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|---|---|---|---|
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| ac3cdfbf35 |
1415
.all-contributorsrc
1415
.all-contributorsrc
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Load Diff
1
.github/FUNDING.yml
vendored
1
.github/FUNDING.yml
vendored
@ -1 +0,0 @@
|
||||
github: [iluwatar]
|
||||
80
.github/workflows/maven-ci.yml
vendored
80
.github/workflows/maven-ci.yml
vendored
@ -1,80 +0,0 @@
|
||||
#
|
||||
# The MIT License
|
||||
# Copyright © 2014-2019 Ilkka Seppälä
|
||||
#
|
||||
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
# of this software and associated documentation files (the "Software"), to deal
|
||||
# in the Software without restriction, including without limitation the rights
|
||||
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
# copies of the Software, and to permit persons to whom the Software is
|
||||
# furnished to do so, subject to the following conditions:
|
||||
#
|
||||
# The above copyright notice and this permission notice shall be included in
|
||||
# all copies or substantial portions of the Software.
|
||||
#
|
||||
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
# THE SOFTWARE.
|
||||
#
|
||||
|
||||
# This workflow will build a Java project with Maven
|
||||
# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
|
||||
|
||||
name: Java CI
|
||||
|
||||
on:
|
||||
push:
|
||||
branches: [ master ]
|
||||
|
||||
|
||||
jobs:
|
||||
|
||||
build:
|
||||
|
||||
runs-on: ubuntu-20.04
|
||||
|
||||
steps:
|
||||
|
||||
- name: Checkout Code
|
||||
uses: actions/checkout@v2
|
||||
with:
|
||||
# Disabling shallow clone for improving relevancy of SonarQube reporting
|
||||
fetch-depth: 0
|
||||
|
||||
- name: Set up JDK 11
|
||||
uses: actions/setup-java@v1
|
||||
with:
|
||||
java-version: 11
|
||||
|
||||
- name: Cache SonarCloud packages
|
||||
uses: actions/cache@v2
|
||||
with:
|
||||
path: ~/.sonar/cache
|
||||
key: ${{ runner.os }}-sonar
|
||||
restore-keys: ${{ runner.os }}-sonar
|
||||
|
||||
- name: Cache Maven dependencies
|
||||
uses: actions/cache@v2
|
||||
with:
|
||||
path: ~/.m2/repository
|
||||
key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
|
||||
restore-keys: |
|
||||
${{ runner.os }}-maven-
|
||||
|
||||
# Some tests need screen access
|
||||
- name: Install xvfb
|
||||
run: sudo apt-get install -y xvfb
|
||||
|
||||
# The SonarQube analysis is only for the master branch of the main repository.
|
||||
# SonarQube scan does not work for forked repositories try changing it to xvfb-run mvn clean verify
|
||||
# See https://jira.sonarsource.com/browse/MMF-1371
|
||||
- name: Build with Maven and run SonarQube analysis
|
||||
run: xvfb-run mvn clean verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar
|
||||
env:
|
||||
# These two env variables are needed for sonar analysis
|
||||
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
|
||||
SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
|
||||
64
.github/workflows/maven-pr-builder.yml
vendored
64
.github/workflows/maven-pr-builder.yml
vendored
@ -1,64 +0,0 @@
|
||||
#
|
||||
# The MIT License
|
||||
# Copyright © 2014-2019 Ilkka Seppälä
|
||||
#
|
||||
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
# of this software and associated documentation files (the "Software"), to deal
|
||||
# in the Software without restriction, including without limitation the rights
|
||||
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
# copies of the Software, and to permit persons to whom the Software is
|
||||
# furnished to do so, subject to the following conditions:
|
||||
#
|
||||
# The above copyright notice and this permission notice shall be included in
|
||||
# all copies or substantial portions of the Software.
|
||||
#
|
||||
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
# THE SOFTWARE.
|
||||
#
|
||||
|
||||
# This workflow will build a Java project with Maven
|
||||
# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
|
||||
|
||||
name: Java PR Builder
|
||||
|
||||
on:
|
||||
pull_request:
|
||||
branches: [ master ]
|
||||
types: [ opened, reopened, synchronize, labeled, unlabeled ]
|
||||
|
||||
jobs:
|
||||
build:
|
||||
|
||||
runs-on: ubuntu-20.04
|
||||
|
||||
steps:
|
||||
- name: Checkout Code
|
||||
uses: actions/checkout@v2
|
||||
|
||||
- name: Set up JDK 11
|
||||
uses: actions/setup-java@v1
|
||||
with:
|
||||
java-version: 11
|
||||
|
||||
- name: Cache Maven Dependecies
|
||||
uses: actions/cache@v2
|
||||
with:
|
||||
path: ~/.m2/repository
|
||||
key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
|
||||
restore-keys: |
|
||||
${{ runner.os }}-maven-
|
||||
|
||||
# Some tests need screen access
|
||||
- name: Install xvfb
|
||||
run: sudo apt-get install -y xvfb
|
||||
|
||||
# This worflow is only for building Pull Requests, the master branch runs Sonar analysis on the main repository.
|
||||
# SonarQube scan does not work for forked repositories.
|
||||
# See https://jira.sonarsource.com/browse/MMF-1371
|
||||
- name: Build with Maven
|
||||
run: xvfb-run mvn clean verify
|
||||
9
.gitignore
vendored
9
.gitignore
vendored
@ -4,8 +4,7 @@ target
|
||||
.classpath
|
||||
.project
|
||||
*.class
|
||||
|
||||
### Package Files ###
|
||||
# Package Files #
|
||||
*.jar
|
||||
*.war
|
||||
*.ear
|
||||
@ -14,8 +13,8 @@ target
|
||||
*.swp
|
||||
datanucleus.log
|
||||
/bin/
|
||||
/bin/
|
||||
/bin/
|
||||
*.log
|
||||
data-mapper/src/main/resources/log4j.xml
|
||||
event-sourcing/Journal.json
|
||||
|
||||
### Checkstyle ###
|
||||
.checkstyle
|
||||
|
||||
39
.travis.yml
Normal file
39
.travis.yml
Normal file
@ -0,0 +1,39 @@
|
||||
language: java
|
||||
jdk:
|
||||
- oraclejdk8
|
||||
|
||||
env:
|
||||
global:
|
||||
- GH_REF: github.com/iluwatar/java-design-patterns.git
|
||||
- secure: LxTDuNS/rBWIvKkaEqr79ImZAe48mCdoYCF41coxNXgNoippo4GIBArknqtv+XvdkiuRZ1yGyj6pn8GU33c/yn+krddTUkVCwTbVatbalW5jhQjDbHYym/JcxaK9ZS/3JTeGcWrBgiPqHEEDhCf26vPZsXoMSeVCEORVKTp1BSg=
|
||||
- secure: "eoWlW9GyTJY04P8K3pxayXwU9/hmptQg/LfirispQkV9YvmziCfSzXnatnBhNfud98sCzY8BScXnb+OWLTnjLKpId4rtEqb0aJ40Jc32cUKzgzFAUn7cNcDAbUIfyPAGVqyQqfj/11wYSADwWMMOPlW97ExUtoyiH2WenXuRHso="
|
||||
|
||||
before_install:
|
||||
- export DISPLAY=:99.0
|
||||
- sh -e /etc/init.d/xvfb start
|
||||
|
||||
# default install command is just "mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V"
|
||||
install:
|
||||
- mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -e
|
||||
|
||||
after_success:
|
||||
- mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.host.url=https://sonarcloud.io -Dsonar.login=$SONAR_TOKEN
|
||||
- bash update-ghpages.sh
|
||||
|
||||
# use latest java version available instead of travis default
|
||||
addons:
|
||||
apt:
|
||||
packages:
|
||||
- oracle-java8-installer
|
||||
|
||||
notifications:
|
||||
email:
|
||||
- iluwatar@gmail.com
|
||||
webhooks:
|
||||
urls:
|
||||
- https://webhooks.gitter.im/e/3319623945358a093a6f
|
||||
on_success: change # options: [always|never|change] default: always
|
||||
on_failure: always # options: [always|never|change] default: always
|
||||
on_start: never # options: [always|never|change] default: always
|
||||
|
||||
sudo: required
|
||||
13
CODE_COVERAGE.md
Normal file
13
CODE_COVERAGE.md
Normal file
@ -0,0 +1,13 @@
|
||||
# Code Coverage Report generation
|
||||
|
||||
To generate the code coverage report, execute the following command:
|
||||
> mvn clean verify jacoco:report
|
||||
|
||||
This will generate code coverage report in each of the modules. In order to view the same, open the following file in your browser.
|
||||
> target/site/jacoco/index.html
|
||||
|
||||
Please note that the above folder is created under each of the modules. For example:
|
||||
* adapter/target/site/jacoco/index.html
|
||||
* busniess-delegate/target/site/jacoco/index.html
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
The MIT License (MIT)
|
||||
|
||||
Copyright (c) 2014-2021 Ilkka Seppälä
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
|
||||
290
README.md
290
README.md
@ -4,312 +4,44 @@
|
||||
|
||||
# Design patterns implemented in Java
|
||||
|
||||
|
||||
[](https://travis-ci.org/iluwatar/java-design-patterns)
|
||||
[](https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/LICENSE.md)
|
||||
[](https://sonarcloud.io/dashboard?id=iluwatar_java-design-patterns)
|
||||
[](https://sonarcloud.io/dashboard?id=iluwatar_java-design-patterns)
|
||||
[](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
|
||||
<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
|
||||
[](#contributors-)
|
||||
<!-- ALL-CONTRIBUTORS-BADGE:END -->
|
||||
|
||||
<br/>
|
||||
|
||||
Read in different language : [**CN**](/zh/README.md),[**KR**](/ko/README.md),[**FR**](/fr/README.md),[**TR**](/tr/README.md),[**AR**](/ar/README.md),
|
||||
|
||||
<br/>
|
||||
[](https://sonarcloud.io/dashboard/index/com.iluwatar%3Ajava-design-patterns)
|
||||
|
||||
# Introduction
|
||||
|
||||
Design patterns are the best formalized practices a programmer can use to
|
||||
Design patterns are formalized best practices that the programmer can use to
|
||||
solve common problems when designing an application or system.
|
||||
|
||||
Design patterns can speed up the development process by providing tested, proven
|
||||
development paradigms.
|
||||
|
||||
Reusing design patterns help prevent subtle issues that cause major
|
||||
Reusing design patterns helps to prevent subtle issues that can cause major
|
||||
problems, and it also improves code readability for coders and architects who
|
||||
are familiar with the patterns.
|
||||
|
||||
# Getting started
|
||||
|
||||
This site showcases Java Design Patterns. The solutions have been developed by
|
||||
experienced programmers and architects from the open source community. The
|
||||
patterns can be browsed by their high level descriptions or by looking at their
|
||||
source code. The source code examples are well commented and can be thought as
|
||||
programming tutorials on how to implement a specific pattern. We use the most
|
||||
popular battle-proven open source Java technologies.
|
||||
|
||||
Before you dive into the material, you should be familiar with various
|
||||
[Software Design Principles](https://java-design-patterns.com/principles/).
|
||||
Programming/Software Design Principles.
|
||||
|
||||
All designs should be as simple as possible. You should start with KISS, YAGNI,
|
||||
and Do The Simplest Thing That Could Possibly Work principles. Complexity and
|
||||
patterns should only be introduced when they are needed for practical
|
||||
extensibility.
|
||||
|
||||
Once you are familiar with these concepts you can start drilling down into the
|
||||
[available design patterns](https://java-design-patterns.com/patterns/) by any
|
||||
of the following approaches
|
||||
Once you are familiar with these concepts you can start drilling down into
|
||||
patterns by any of the following approaches
|
||||
|
||||
- Search for a specific pattern by name. Can't find one? Please report a new pattern [here](https://github.com/iluwatar/java-design-patterns/issues).
|
||||
- Using tags such as `Performance`, `Gang of Four` or `Data access`.
|
||||
- Using pattern categories, `Creational`, `Behavioral`, and others.
|
||||
|
||||
Hopefully you find the object oriented solutions presented on this site useful
|
||||
in your architectures and have as much fun learning them as we had developing them.
|
||||
- Using difficulty tags, `Difficulty-Beginner`, `Difficulty-Intermediate` & `Difficulty-Expert`.
|
||||
- Using pattern categories, `Creational`, `Behavioral` and others.
|
||||
- Search for a specific pattern. Can't find one? Please report a new pattern [here](https://github.com/iluwatar/java-design-patterns/issues).
|
||||
|
||||
# How to contribute
|
||||
|
||||
If you are willing to contribute to the project you will find the relevant information in
|
||||
our [developer wiki](https://github.com/iluwatar/java-design-patterns/wiki). We will help
|
||||
you and answer your questions in the [Gitter chatroom](https://gitter.im/iluwatar/java-design-patterns).
|
||||
If you are willing to contribute to the project you will find the relevant information in our [developer wiki](https://github.com/iluwatar/java-design-patterns/wiki). We will help you and answer your questions in the [Gitter chatroom](https://gitter.im/iluwatar/java-design-patterns).
|
||||
|
||||
# License
|
||||
|
||||
This project is licensed under the terms of the MIT license.
|
||||
|
||||
# Contributors
|
||||
|
||||
<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
|
||||
<!-- prettier-ignore-start -->
|
||||
<!-- markdownlint-disable -->
|
||||
<table>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/iluwatar"><img src="https://avatars1.githubusercontent.com/u/582346?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ilkka Seppälä</b></sub></a><br /><a href="#projectManagement-iluwatar" title="Project Management">📆</a> <a href="#maintenance-iluwatar" title="Maintenance">🚧</a> <a href="#content-iluwatar" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://github.com/amit1307"><img src="https://avatars0.githubusercontent.com/u/23420222?v=4?s=100" width="100px;" alt=""/><br /><sub><b>amit1307</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=amit1307" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/npathai"><img src="https://avatars2.githubusercontent.com/u/1792515?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Narendra Pathai</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=npathai" title="Code">💻</a> <a href="#ideas-npathai" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Anpathai" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="https://github.com/fluxw42"><img src="https://avatars1.githubusercontent.com/u/1545460?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jeroen Meulemeester</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=fluxw42" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="http://www.joemccarthy.co.uk"><img src="https://avatars0.githubusercontent.com/u/4526195?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Joseph McCarthy</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=mikulucky" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/thomasoss"><img src="https://avatars1.githubusercontent.com/u/22516154?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Thomas</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=thomasoss" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/anuragagarwal561994"><img src="https://avatars1.githubusercontent.com/u/6075379?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Anurag Agarwal</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=anuragagarwal561994" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://markusmo3.github.io"><img src="https://avatars1.githubusercontent.com/u/3317416?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Markus Moser</b></sub></a><br /><a href="#design-markusmo3" title="Design">🎨</a> <a href="https://github.com/iluwatar/java-design-patterns/commits?author=markusmo3" title="Code">💻</a> <a href="#ideas-markusmo3" title="Ideas, Planning, & Feedback">🤔</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://twitter.com/i_sabiq"><img src="https://avatars1.githubusercontent.com/u/19510920?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sabiq Ihab</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=isabiq" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://inbravo.github.io"><img src="https://avatars3.githubusercontent.com/u/5253764?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Amit Dixit</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=inbravo" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/piyushchaudhari04"><img src="https://avatars3.githubusercontent.com/u/10268029?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Piyush Kailash Chaudhari</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=piyushchaudhari04" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/joshzambales"><img src="https://avatars1.githubusercontent.com/u/8704552?v=4?s=100" width="100px;" alt=""/><br /><sub><b>joshzambales</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=joshzambales" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/Crossy147"><img src="https://avatars2.githubusercontent.com/u/7272996?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Kamil Pietruszka</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Crossy147" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://cs.joensuu.fi/~zkhayda"><img src="https://avatars2.githubusercontent.com/u/660742?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Zafar Khaydarov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=zafarella" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/commits?author=zafarella" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="https://kemitix.github.io/"><img src="https://avatars1.githubusercontent.com/u/1147749?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Paul Campbell</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kemitix" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Argyro-Sioziou"><img src="https://avatars0.githubusercontent.com/u/22822639?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Argyro Sioziou</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Argyro-Sioziou" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/TylerMcConville"><img src="https://avatars0.githubusercontent.com/u/4946449?v=4?s=100" width="100px;" alt=""/><br /><sub><b>TylerMcConville</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=TylerMcConville" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/saksham93"><img src="https://avatars1.githubusercontent.com/u/37399540?v=4?s=100" width="100px;" alt=""/><br /><sub><b>saksham93</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=saksham93" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/nikhilbarar"><img src="https://avatars2.githubusercontent.com/u/37332144?v=4?s=100" width="100px;" alt=""/><br /><sub><b>nikhilbarar</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=nikhilbarar" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://colinbut.com"><img src="https://avatars2.githubusercontent.com/u/10725674?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Colin But</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=colinbut" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/ruslanpa"><img src="https://avatars2.githubusercontent.com/u/1503411?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ruslan</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ruslanpa" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/JuhoKang"><img src="https://avatars1.githubusercontent.com/u/4745294?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Juho Kang</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=JuhoKang" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/dheeraj-mummareddy"><img src="https://avatars2.githubusercontent.com/u/7002230?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dheeraj Mummareddy</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dheeraj-mummareddy" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.bernardosulzbach.com"><img src="https://avatars0.githubusercontent.com/u/8271090?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Bernardo Sulzbach</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=bernardosulzbach" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/4lexis"><img src="https://avatars0.githubusercontent.com/u/19871727?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Aleksandar Dudukovic</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=4lexis" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.yusufaytas.com"><img src="https://avatars2.githubusercontent.com/u/1049483?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yusuf Aytaş</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=yusufaytas" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://futurehomes.hu"><img src="https://avatars2.githubusercontent.com/u/1001491?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mihály Kuprivecz</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=qpi" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/kapinuss"><img src="https://avatars0.githubusercontent.com/u/17639945?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Stanislav Kapinus</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kapinuss" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/gvsharma"><img src="https://avatars1.githubusercontent.com/u/6648152?v=4?s=100" width="100px;" alt=""/><br /><sub><b>GVSharma</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=gvsharma" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/SrdjanPaunovic"><img src="https://avatars1.githubusercontent.com/u/22815104?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Srđan Paunović</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=SrdjanPaunovic" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://sideris.xyz/"><img src="https://avatars3.githubusercontent.com/u/5484694?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Petros G. Sideris</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=sideris" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/pramodgupta3/"><img src="https://avatars1.githubusercontent.com/u/2184241?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Pramod Gupta</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3AIAmPramod" title="Reviewed Pull Requests">👀</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://amarnath510.github.io/portfolio"><img src="https://avatars0.githubusercontent.com/u/4599623?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Amarnath Chandana</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Amarnath510" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Anurag870"><img src="https://avatars1.githubusercontent.com/u/6295975?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Anurag870</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Anurag870" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/commits?author=Anurag870" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="http://theerroris.me"><img src="https://avatars0.githubusercontent.com/u/1685953?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wes Gilleland</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Deathnerd" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Harshrajsinh"><img src="https://avatars2.githubusercontent.com/u/22811531?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Harshraj Thakor</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Harshrajsinh" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/MaVdbussche"><img src="https://avatars1.githubusercontent.com/u/26136934?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Martin Vandenbussche</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=MaVdbussche" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://alexsomai.com"><img src="https://avatars1.githubusercontent.com/u/5720977?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Alexandru Somai</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=alexsomai" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/amogozov"><img src="https://avatars3.githubusercontent.com/u/7372215?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Artur Mogozov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=amogozov" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/anthonycampbell"><img src="https://avatars3.githubusercontent.com/u/10249255?v=4?s=100" width="100px;" alt=""/><br /><sub><b>anthony</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=anthonycampbell" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="http://ccygnus.com/"><img src="https://avatars1.githubusercontent.com/u/9342724?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Christian Cygnus</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=christophercolumbusdog" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://about.me/dzmitryh"><img src="https://avatars2.githubusercontent.com/u/5390492?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dima Gubin</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dzmitryh" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/jjjimenez100"><img src="https://avatars3.githubusercontent.com/u/22243493?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Joshua Jimenez</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=jjjimenez100" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://about.me/kaiwinter"><img src="https://avatars0.githubusercontent.com/u/110982?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Kai Winter</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kaiwinter" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/lbroman"><img src="https://avatars1.githubusercontent.com/u/86007?v=4?s=100" width="100px;" alt=""/><br /><sub><b>lbroman</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=lbroman" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://przemeknowak.com"><img src="https://avatars1.githubusercontent.com/u/3254609?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Przemek</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=pnowy" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/prafful1"><img src="https://avatars0.githubusercontent.com/u/14350274?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Prafful Agarwal</b></sub></a><br /><a href="#content-prafful1" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://github.com/sankypanhale"><img src="https://avatars1.githubusercontent.com/u/6478783?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sanket Panhale</b></sub></a><br /><a href="#content-sankypanhale" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/staillebois"><img src="https://avatars0.githubusercontent.com/u/23701200?v=4?s=100" width="100px;" alt=""/><br /><sub><b>staillebois</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=staillebois" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/valdar-hu"><img src="https://avatars3.githubusercontent.com/u/17962817?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Krisztián Nagy</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=valdar-hu" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.vanogrid.com"><img src="https://avatars0.githubusercontent.com/u/4307918?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Alexander Ivanov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vanogrid" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/yosfik"><img src="https://avatars3.githubusercontent.com/u/4850270?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yosfik Alqadri</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=yosfik" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/7agustibm"><img src="https://avatars0.githubusercontent.com/u/8149332?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Agustí Becerra Milà</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=7agustibm" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Juaanma"><img src="https://avatars3.githubusercontent.com/u/7390500?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Juan Manuel Suárez</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Juaanma" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://www.devsedge.net/"><img src="https://avatars0.githubusercontent.com/u/9956006?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Luigi Cortese</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=LuigiCortese" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Rzeposlaw"><img src="https://avatars2.githubusercontent.com/u/18425745?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Katarzyna Rzepecka</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Rzeposlaw" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="http://adamski.pro"><img src="https://avatars1.githubusercontent.com/u/6537430?v=4?s=100" width="100px;" alt=""/><br /><sub><b>adamski.pro</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=akrystian" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/baislsl"><img src="https://avatars0.githubusercontent.com/u/17060584?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Shengli Bai</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=baislsl" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/besok"><img src="https://avatars2.githubusercontent.com/u/29834592?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Boris</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=besok" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/dmitraver"><img src="https://avatars3.githubusercontent.com/u/1798156?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dmitry Avershin</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dmitraver" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/fanofxiaofeng"><img src="https://avatars0.githubusercontent.com/u/3983683?v=4?s=100" width="100px;" alt=""/><br /><sub><b>靳阳</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=fanofxiaofeng" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/hoangnam2261"><img src="https://avatars2.githubusercontent.com/u/31692990?v=4?s=100" width="100px;" alt=""/><br /><sub><b>hoangnam2261</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=hoangnam2261" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/jarpit96"><img src="https://avatars2.githubusercontent.com/u/10098713?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Arpit Jain</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=jarpit96" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://joningi.net"><img src="https://avatars2.githubusercontent.com/u/6115148?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jón Ingi Sveinbjörnsson</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=joningiwork" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/kirill-vlasov"><img src="https://avatars3.githubusercontent.com/u/16112495?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Kirill Vlasov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kirill-vlasov" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://mitchell-irvin.com"><img src="https://avatars0.githubusercontent.com/u/16233245?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mitchell Irvin</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=mitchellirvin" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://ranjeet-floyd.github.io"><img src="https://avatars0.githubusercontent.com/u/1992972?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ranjeet</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ranjeet-floyd" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://alwayswithme.github.io"><img src="https://avatars3.githubusercontent.com/u/3234786?v=4?s=100" width="100px;" alt=""/><br /><sub><b>PhoenixYip</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Alwayswithme" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/MSaifAsif"><img src="https://avatars1.githubusercontent.com/u/6280554?v=4?s=100" width="100px;" alt=""/><br /><sub><b>M Saif Asif</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=MSaifAsif" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/kanwarpreet25"><img src="https://avatars0.githubusercontent.com/u/39183641?v=4?s=100" width="100px;" alt=""/><br /><sub><b>kanwarpreet25</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kanwarpreet25" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://leonmak.me"><img src="https://avatars3.githubusercontent.com/u/13071508?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Leon Mak</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=leonmak" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://www.wramdemark.se"><img src="https://avatars2.githubusercontent.com/u/7052193?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Per Wramdemark</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=perwramdemark" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/waisuan"><img src="https://avatars2.githubusercontent.com/u/10975700?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Evan Sia Wai Suan</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=waisuan" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/AnaghaSasikumar"><img src="https://avatars2.githubusercontent.com/u/42939261?v=4?s=100" width="100px;" alt=""/><br /><sub><b>AnaghaSasikumar</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=AnaghaSasikumar" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://christofferh.com"><img src="https://avatars1.githubusercontent.com/u/767643?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Christoffer Hamberg</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=christofferh" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/dgruntz"><img src="https://avatars0.githubusercontent.com/u/1516800?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dominik Gruntz</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dgruntz" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://bitbucket.org/hannespernpeintner/"><img src="https://avatars3.githubusercontent.com/u/1679437?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Hannes</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=hannespernpeintner" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/leogtzr"><img src="https://avatars0.githubusercontent.com/u/1211969?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Leo Gutiérrez Ramírez</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=leogtzr" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/npczwh"><img src="https://avatars0.githubusercontent.com/u/14066422?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Zhang WH</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=npczwh" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/oconnelc"><img src="https://avatars0.githubusercontent.com/u/1112973?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Christopher O'Connell</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=oconnelc" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/giorgosmav21"><img src="https://avatars2.githubusercontent.com/u/22855493?v=4?s=100" width="100px;" alt=""/><br /><sub><b>George Mavroeidis</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=giorgosmav21" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/hbothra15"><img src="https://avatars1.githubusercontent.com/u/7418012?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Hemant Bothra</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=hbothra15" title="Code">💻</a> <a href="#design-hbothra15" title="Design">🎨</a></td>
|
||||
<td align="center"><a href="https://www.kevinpeters.net/about/"><img src="https://avatars1.githubusercontent.com/u/12736734?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Kevin Peters</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=igeligel" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://llorllale.github.io/"><img src="https://avatars1.githubusercontent.com/u/2019896?v=4?s=100" width="100px;" alt=""/><br /><sub><b>George Aristy</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=llorllale" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/mookkiah"><img src="https://avatars1.githubusercontent.com/u/8975264?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mahendran Mookkiah</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=mookkiah" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Azureyjt"><img src="https://avatars2.githubusercontent.com/u/18476317?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Azureyjt</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Azureyjt" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/vehpsr"><img src="https://avatars2.githubusercontent.com/u/3133265?v=4?s=100" width="100px;" alt=""/><br /><sub><b>gans</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vehpsr" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/ThatGuyWithTheHat"><img src="https://avatars0.githubusercontent.com/u/24470582?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Matt</b></sub></a><br /><a href="#content-ThatGuyWithTheHat" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/gopinathlangote/"><img src="https://avatars2.githubusercontent.com/u/10210778?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Gopinath Langote</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=gopinath-langote" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/hoswey"><img src="https://avatars3.githubusercontent.com/u/3689445?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Hoswey</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=hoswey" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/amit2103"><img src="https://avatars3.githubusercontent.com/u/7566692?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Amit Pandey</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=amit2103" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/gwildor28"><img src="https://avatars0.githubusercontent.com/u/16000365?v=4?s=100" width="100px;" alt=""/><br /><sub><b>gwildor28</b></sub></a><br /><a href="#content-gwildor28" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://t.me/paul_docker"><img src="https://avatars1.githubusercontent.com/u/2404785?v=4?s=100" width="100px;" alt=""/><br /><sub><b>田浩</b></sub></a><br /><a href="#content-llitfkitfk" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://twitter.com/StPitsios"><img src="https://avatars1.githubusercontent.com/u/6773603?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Stamatis Pitsios</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=pitsios-s" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/qza"><img src="https://avatars3.githubusercontent.com/u/233149?v=4?s=100" width="100px;" alt=""/><br /><sub><b>qza</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=qza" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://tschis.github.io"><img src="https://avatars1.githubusercontent.com/u/20662669?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rodolfo Forte</b></sub></a><br /><a href="#content-Tschis" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/ankurkaushal"><img src="https://avatars2.githubusercontent.com/u/2236616?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ankur Kaushal</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ankurkaushal" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/ovidijus-okinskas/"><img src="https://avatars0.githubusercontent.com/u/20372387?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ovidijus Okinskas</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=okinskas" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/robertt240"><img src="https://avatars1.githubusercontent.com/u/9137432?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Robert Kasperczyk</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=robertt240" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/trautonen"><img src="https://avatars3.githubusercontent.com/u/1641063?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Tapio Rautonen</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=trautonen" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="http://vk.com/yuri.orlov"><img src="https://avatars0.githubusercontent.com/u/1595733?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yuri Orlov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=yorlov" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/varunu28/"><img src="https://avatars0.githubusercontent.com/u/7676016?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Varun Upadhyay</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=varunu28" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/PalAditya"><img src="https://avatars2.githubusercontent.com/u/25523604?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Aditya Pal</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=PalAditya" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/grzesiekkedzior"><img src="https://avatars3.githubusercontent.com/u/23739158?v=4?s=100" width="100px;" alt=""/><br /><sub><b>grzesiekkedzior</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=grzesiekkedzior" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Agrzesiekkedzior" title="Reviewed Pull Requests">👀</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/sivasubramanim"><img src="https://avatars2.githubusercontent.com/u/51107434?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sivasubramani M</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=sivasubramanim" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/d4gg4d"><img src="https://avatars2.githubusercontent.com/u/99457?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sami Airaksinen</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=d4gg4d" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/vertti"><img src="https://avatars0.githubusercontent.com/u/557751?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Janne Sinivirta</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vertti" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/Bobo1239"><img src="https://avatars1.githubusercontent.com/u/2302947?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Boris-Chengbiao Zhou</b></sub></a><br /><a href="#content-Bobo1239" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://jahhein.github.io"><img src="https://avatars2.githubusercontent.com/u/10779515?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jacob Hein</b></sub></a><br /><a href="#content-Jahhein" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://github.com/iamrichardjones"><img src="https://avatars3.githubusercontent.com/u/14842151?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Richard Jones</b></sub></a><br /><a href="#content-iamrichardjones" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://rachelcarmena.github.io"><img src="https://avatars0.githubusercontent.com/u/22792183?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rachel M. Carmena</b></sub></a><br /><a href="#content-rachelcarmena" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://zd-zero.github.io"><img src="https://avatars0.githubusercontent.com/u/21978370?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Zaerald Denze Lungos</b></sub></a><br /><a href="#content-zd-zero" title="Content">🖋</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://webpro.nl"><img src="https://avatars1.githubusercontent.com/u/456426?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Lars Kappert</b></sub></a><br /><a href="#content-webpro" title="Content">🖋</a></td>
|
||||
<td align="center"><a href="https://xiaod.info"><img src="https://avatars2.githubusercontent.com/u/21277644?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mike Liu</b></sub></a><br /><a href="#translation-xiaod-dev" title="Translation">🌍</a></td>
|
||||
<td align="center"><a href="https://github.com/charlesfinley"><img src="https://avatars1.githubusercontent.com/u/6307904?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Matt Dolan</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=charlesfinley" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Acharlesfinley" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="https://github.com/MananS77"><img src="https://avatars3.githubusercontent.com/u/21033516?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Manan</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3AMananS77" title="Reviewed Pull Requests">👀</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/nishant"><img src="https://avatars2.githubusercontent.com/u/15331971?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nishant Arora</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=nishant" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/raja-peeyush-kumar-singh"><img src="https://avatars0.githubusercontent.com/u/5496024?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Peeyush</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=raja-peeyush-kumar-singh" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/ravening"><img src="https://avatars1.githubusercontent.com/u/10645273?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rakesh</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ravening" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Aravening" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="https://github.com/vINCENT8888801"><img src="https://avatars0.githubusercontent.com/u/8037883?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wei Seng</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vINCENT8888801" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/ashish-trivedi-218379135/"><img src="https://avatars3.githubusercontent.com/u/23194128?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ashish Trivedi</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ashishtrivedi16" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://rayyounghong.com"><img src="https://avatars1.githubusercontent.com/u/41055099?v=4?s=100" width="100px;" alt=""/><br /><sub><b>洪月阳</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=RayYH" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://xdvrx1.github.io/"><img src="https://avatars0.githubusercontent.com/u/47092464?v=4?s=100" width="100px;" alt=""/><br /><sub><b>xdvrx1</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Axdvrx1" title="Reviewed Pull Requests">👀</a> <a href="#ideas-xdvrx1" title="Ideas, Planning, & Feedback">🤔</a></td>
|
||||
<td align="center"><a href="http://subho.xyz"><img src="https://avatars0.githubusercontent.com/u/13291222?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Subhrodip Mohanta</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ohbus" title="Code">💻</a> <a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Aohbus" title="Reviewed Pull Requests">👀</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/nahteb"><img src="https://avatars3.githubusercontent.com/u/13121570?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Bethan Palmer</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=nahteb" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/ToxicDreamz"><img src="https://avatars0.githubusercontent.com/u/45225562?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Toxic Dreamz</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ToxicDreamz" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://www.edycutjong.com"><img src="https://avatars1.githubusercontent.com/u/1098102?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Edy Cu Tjong</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=edycutjong" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="https://github.com/mkrzywanski"><img src="https://avatars0.githubusercontent.com/u/15279585?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Michał Krzywański</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=mkrzywanski" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://www.stefan-birkner.de"><img src="https://avatars1.githubusercontent.com/u/711349?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Stefan Birkner</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=stefanbirkner" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/fedorskvorcov"><img src="https://avatars3.githubusercontent.com/u/43882212?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Fedor Skvorcov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=fedorskvorcov" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/samilAyoub"><img src="https://avatars0.githubusercontent.com/u/61546990?v=4?s=100" width="100px;" alt=""/><br /><sub><b>samilAyoub</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=samilAyoub" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/vdlald"><img src="https://avatars0.githubusercontent.com/u/29997701?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Vladislav Golubinov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vdlald" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/swarajsaaj"><img src="https://avatars2.githubusercontent.com/u/6285049?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Swaraj</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=swarajsaaj" title="Code">💻</a></td>
|
||||
<td align="center"><a href="http://christophflick.de"><img src="https://avatars0.githubusercontent.com/u/4465376?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Christoph Flick</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ChFlick" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="https://github.com/Ascenio"><img src="https://avatars1.githubusercontent.com/u/7662016?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ascênio</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3AAscenio" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="https://www.linkedin.com/in/domenico-sibilio/"><img src="https://avatars2.githubusercontent.com/u/24280982?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Domenico Sibilio</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dsibilio" title="Documentation">📖</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/akashchandwani"><img src="https://avatars2.githubusercontent.com/u/3483277?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Akash Chandwani</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3Aakashchandwani" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="http://www.linkedin.com/in/manannikov"><img src="https://avatars2.githubusercontent.com/u/7019769?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Pavlo Manannikov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=manannikov" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/eimanip"><img src="https://avatars0.githubusercontent.com/u/20307301?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Eiman</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=eimanip" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/OrangePants-R"><img src="https://avatars0.githubusercontent.com/u/42976136?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rocky</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=OrangePants-R" title="Documentation">📖</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://ibrahimalii.github.io/"><img src="https://avatars2.githubusercontent.com/u/21141301?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ibrahim ali abdelghany</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/pulls?q=is%3Apr+reviewed-by%3AibrahimAlii" title="Reviewed Pull Requests">👀</a></td>
|
||||
<td align="center"><a href="https://github.com/gkulkarni2020"><img src="https://avatars3.githubusercontent.com/u/5161548?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Girish Kulkarni</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=gkulkarni2020" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="https://github.com/omk13"><img src="https://avatars0.githubusercontent.com/u/59054172?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Omar Karazoun</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=omk13" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/jeff303"><img src="https://avatars0.githubusercontent.com/u/3521562?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jeff Evans</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=jeff303" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://viveksb007.github.io"><img src="https://avatars1.githubusercontent.com/u/12713808?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Vivek Singh</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=viveksb007" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/siavashsoleymani"><img src="https://avatars2.githubusercontent.com/u/18074419?v=4?s=100" width="100px;" alt=""/><br /><sub><b>siavash</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=siavashsoleymani" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/ruchpeanuts"><img src="https://avatars0.githubusercontent.com/u/29301900?v=4?s=100" width="100px;" alt=""/><br /><sub><b>ruchpeanuts</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ruchpeanuts" title="Documentation">📖</a></td>
|
||||
<td align="center"><a href="https://github.com/warp125"><img src="https://avatars1.githubusercontent.com/u/48073115?v=4?s=100" width="100px;" alt=""/><br /><sub><b>warp125</b></sub></a><br /><a href="#translation-warp125" title="Translation">🌍</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="http://libkhadir.fr"><img src="https://avatars1.githubusercontent.com/u/45130488?v=4?s=100" width="100px;" alt=""/><br /><sub><b>KHADIR Tayeb</b></sub></a><br /><a href="#translation-tkhadir" title="Translation">🌍</a></td>
|
||||
<td align="center"><a href="https://github.com/ignite1771"><img src="https://avatars2.githubusercontent.com/u/59446563?v=4?s=100" width="100px;" alt=""/><br /><sub><b>ignite1771</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=ignite1771" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/demirhalil"><img src="https://avatars1.githubusercontent.com/u/22895118?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Halil Demir</b></sub></a><br /><a href="#translation-demirhalil" title="Translation">🌍</a></td>
|
||||
<td align="center"><a href="https://github.com/rohit10000"><img src="https://avatars.githubusercontent.com/u/20845565?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rohit Singh</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=rohit10000" title="Code">💻</a></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/byoungju94"><img src="https://avatars.githubusercontent.com/u/42516378?v=4?s=100" width="100px;" alt=""/><br /><sub><b>byoungju94</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=byoungju94" title="Code">💻</a></td>
|
||||
<td align="center"><a href="https://github.com/moustafafarhat"><img src="https://avatars.githubusercontent.com/u/38836727?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Moustafa Farhat</b></sub></a><br /><a href="#translation-moustafafarhat" title="Translation">🌍</a></td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<!-- markdownlint-restore -->
|
||||
<!-- prettier-ignore-end -->
|
||||
|
||||
<!-- ALL-CONTRIBUTORS-LIST:END -->
|
||||
|
||||
@ -5,186 +5,25 @@ folder: abstract-document
|
||||
permalink: /patterns/abstract-document/
|
||||
categories: Structural
|
||||
tags:
|
||||
- Extensibility
|
||||
- Java
|
||||
- Difficulty-Intermediate
|
||||
---
|
||||
|
||||
## Intent
|
||||
|
||||
Use dynamic properties and achieve flexibility of untyped languages while keeping type-safety.
|
||||
|
||||
## Explanation
|
||||
|
||||
The Abstract Document pattern enables handling additional, non-static properties. This pattern
|
||||
uses concept of traits to enable type safety and separate properties of different classes into
|
||||
set of interfaces.
|
||||
|
||||
Real world example
|
||||
|
||||
> Consider a car that consists of multiple parts. However we don't know if the specific car really has all the parts, or just some of them. Our cars are dynamic and extremely flexible.
|
||||
|
||||
In plain words
|
||||
|
||||
> Abstract Document pattern allows attaching properties to objects without them knowing about it.
|
||||
|
||||
Wikipedia says
|
||||
|
||||
> An object-oriented structural design pattern for organizing objects in loosely typed key-value stores and exposing
|
||||
the data using typed views. The purpose of the pattern is to achieve a high degree of flexibility between components
|
||||
in a strongly typed language where new properties can be added to the object-tree on the fly, without losing the
|
||||
support of type-safety. The pattern makes use of traits to separate different properties of a class into different
|
||||
interfaces.
|
||||
|
||||
**Programmatic Example**
|
||||
|
||||
Let's first define the base classes `Document` and `AbstractDocument`. They basically make the object hold a property
|
||||
map and any amount of child objects.
|
||||
|
||||
```java
|
||||
public interface Document {
|
||||
|
||||
Void put(String key, Object value);
|
||||
|
||||
Object get(String key);
|
||||
|
||||
<T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor);
|
||||
}
|
||||
|
||||
public abstract class AbstractDocument implements Document {
|
||||
|
||||
private final Map<String, Object> properties;
|
||||
|
||||
protected AbstractDocument(Map<String, Object> properties) {
|
||||
Objects.requireNonNull(properties, "properties map is required");
|
||||
this.properties = properties;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Void put(String key, Object value) {
|
||||
properties.put(key, value);
|
||||
return null;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Object get(String key) {
|
||||
return properties.get(key);
|
||||
}
|
||||
|
||||
@Override
|
||||
public <T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor) {
|
||||
return Stream.ofNullable(get(key))
|
||||
.filter(Objects::nonNull)
|
||||
.map(el -> (List<Map<String, Object>>) el)
|
||||
.findAny()
|
||||
.stream()
|
||||
.flatMap(Collection::stream)
|
||||
.map(constructor);
|
||||
}
|
||||
...
|
||||
}
|
||||
```
|
||||
Next we define an enum `Property` and a set of interfaces for type, price, model and parts. This allows us to create
|
||||
static looking interface to our `Car` class.
|
||||
|
||||
```java
|
||||
public enum Property {
|
||||
|
||||
PARTS, TYPE, PRICE, MODEL
|
||||
}
|
||||
|
||||
public interface HasType extends Document {
|
||||
|
||||
default Optional<String> getType() {
|
||||
return Optional.ofNullable((String) get(Property.TYPE.toString()));
|
||||
}
|
||||
}
|
||||
|
||||
public interface HasPrice extends Document {
|
||||
|
||||
default Optional<Number> getPrice() {
|
||||
return Optional.ofNullable((Number) get(Property.PRICE.toString()));
|
||||
}
|
||||
}
|
||||
public interface HasModel extends Document {
|
||||
|
||||
default Optional<String> getModel() {
|
||||
return Optional.ofNullable((String) get(Property.MODEL.toString()));
|
||||
}
|
||||
}
|
||||
|
||||
public interface HasParts extends Document {
|
||||
|
||||
default Stream<Part> getParts() {
|
||||
return children(Property.PARTS.toString(), Part::new);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Now we are ready to introduce the `Car`.
|
||||
|
||||
```java
|
||||
public class Car extends AbstractDocument implements HasModel, HasPrice, HasParts {
|
||||
|
||||
public Car(Map<String, Object> properties) {
|
||||
super(properties);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
And finally here's how we construct and use the `Car` in a full example.
|
||||
|
||||
```java
|
||||
LOGGER.info("Constructing parts and car");
|
||||
|
||||
var wheelProperties = Map.of(
|
||||
Property.TYPE.toString(), "wheel",
|
||||
Property.MODEL.toString(), "15C",
|
||||
Property.PRICE.toString(), 100L);
|
||||
|
||||
var doorProperties = Map.of(
|
||||
Property.TYPE.toString(), "door",
|
||||
Property.MODEL.toString(), "Lambo",
|
||||
Property.PRICE.toString(), 300L);
|
||||
|
||||
var carProperties = Map.of(
|
||||
Property.MODEL.toString(), "300SL",
|
||||
Property.PRICE.toString(), 10000L,
|
||||
Property.PARTS.toString(), List.of(wheelProperties, doorProperties));
|
||||
|
||||
var car = new Car(carProperties);
|
||||
|
||||
LOGGER.info("Here is our car:");
|
||||
LOGGER.info("-> model: {}", car.getModel().orElseThrow());
|
||||
LOGGER.info("-> price: {}", car.getPrice().orElseThrow());
|
||||
LOGGER.info("-> parts: ");
|
||||
car.getParts().forEach(p -> LOGGER.info("\t{}/{}/{}",
|
||||
p.getType().orElse(null),
|
||||
p.getModel().orElse(null),
|
||||
p.getPrice().orElse(null))
|
||||
);
|
||||
|
||||
// Constructing parts and car
|
||||
// Here is our car:
|
||||
// model: 300SL
|
||||
// price: 10000
|
||||
// parts:
|
||||
// wheel/15C/100
|
||||
// door/Lambo/300
|
||||
```
|
||||
|
||||
## Class diagram
|
||||
Achieve flexibility of untyped languages and keep the type-safety
|
||||
|
||||
|
||||
|
||||
## Applicability
|
||||
|
||||
## Applicability
|
||||
Use the Abstract Document Pattern when
|
||||
|
||||
* There is a need to add new properties on the fly
|
||||
* You want a flexible way to organize domain in tree like structure
|
||||
* You want more loosely coupled system
|
||||
* there is a need to add new properties on the fly
|
||||
* you want a flexible way to organize domain in tree like structure
|
||||
* you want more loosely coupled system
|
||||
|
||||
|
||||
## Credits
|
||||
|
||||
* [Wikipedia: Abstract Document Pattern](https://en.wikipedia.org/wiki/Abstract_Document_Pattern)
|
||||
* [Martin Fowler: Dealing with properties](http://martinfowler.com/apsupp/properties.pdf)
|
||||
* [Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing (v. 4)](https://www.amazon.com/gp/product/0470059028/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=javadesignpat-20&creative=9325&linkCode=as2&creativeASIN=0470059028&linkId=e3aacaea7017258acf184f9f3283b492)
|
||||
* [Martin Fowler: Dealing with properties](http://martinfowler.com/apsupp/properties.pdf)
|
||||
@ -1,65 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.abstractdocument.domain.enums {
|
||||
enum Property {
|
||||
+ MODEL {static}
|
||||
+ PARTS {static}
|
||||
+ PRICE {static}
|
||||
+ TYPE {static}
|
||||
+ valueOf(name : String) : Property {static}
|
||||
+ values() : Property[] {static}
|
||||
}
|
||||
}
|
||||
package com.iluwatar.abstractdocument.domain {
|
||||
class Car {
|
||||
+ Car(properties : Map<String, Object>)
|
||||
}
|
||||
interface HasModel {
|
||||
+ getModel() : Optional<String>
|
||||
}
|
||||
interface HasParts {
|
||||
+ getParts() : Stream<Part>
|
||||
}
|
||||
interface HasPrice {
|
||||
+ getPrice() : Optional<Number>
|
||||
}
|
||||
interface HasType {
|
||||
+ getType() : Optional<String>
|
||||
}
|
||||
class Part {
|
||||
+ Part(properties : Map<String, Object>)
|
||||
}
|
||||
}
|
||||
package com.iluwatar.abstractdocument {
|
||||
abstract class AbstractDocument {
|
||||
- properties : Map<String, Object>
|
||||
# AbstractDocument(properties : Map<String, Object>)
|
||||
+ children(key : String, constructor : Function<Map<String, Object>, T>) : Stream<T>
|
||||
+ get(key : String) : Object
|
||||
+ put(key : String, value : Object)
|
||||
+ toString() : String
|
||||
}
|
||||
class App {
|
||||
- LOGGER : Logger {static}
|
||||
+ App()
|
||||
+ main(args : String[]) {static}
|
||||
}
|
||||
interface Document {
|
||||
+ children(String, Function<Map<String, Object>, T>) : Stream<T> {abstract}
|
||||
+ get(String) : Object {abstract}
|
||||
+ put(String, Object) {abstract}
|
||||
}
|
||||
}
|
||||
AbstractDocument ..|> Document
|
||||
Car ..|> HasModel
|
||||
Car ..|> HasPrice
|
||||
Car ..|> HasParts
|
||||
Car --|> AbstractDocument
|
||||
HasModel --|> Document
|
||||
HasParts --|> Document
|
||||
HasPrice --|> Document
|
||||
HasType --|> Document
|
||||
Part ..|> HasType
|
||||
Part ..|> HasModel
|
||||
Part ..|> HasPrice
|
||||
Part --|> AbstractDocument
|
||||
@enduml
|
||||
@ -1,55 +1,47 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>abstract-document</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<!-- Maven assembly plugin is invoked with default setting which we have
|
||||
in parent pom and specifying the class having main method -->
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.abstractdocument.App</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>abstract-document</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</project>
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,18 +20,17 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import java.util.Collection;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.Objects;
|
||||
import java.util.Optional;
|
||||
import java.util.function.Function;
|
||||
import java.util.stream.Stream;
|
||||
|
||||
/**
|
||||
* Abstract implementation of Document interface.
|
||||
* Abstract implementation of Document interface
|
||||
*/
|
||||
public abstract class AbstractDocument implements Document {
|
||||
|
||||
@ -55,21 +54,17 @@ public abstract class AbstractDocument implements Document {
|
||||
|
||||
@Override
|
||||
public <T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor) {
|
||||
return Stream.ofNullable(get(key))
|
||||
.filter(Objects::nonNull)
|
||||
.map(el -> (List<Map<String, Object>>) el)
|
||||
.findAny()
|
||||
.stream()
|
||||
.flatMap(Collection::stream)
|
||||
.map(constructor);
|
||||
Optional<List<Map<String, Object>>> any = Stream.of(get(key)).filter(el -> el != null)
|
||||
.map(el -> (List<Map<String, Object>>) el).findAny();
|
||||
return any.isPresent() ? any.get().stream().map(constructor) : Stream.empty();
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
var builder = new StringBuilder();
|
||||
StringBuilder builder = new StringBuilder();
|
||||
builder.append(getClass().getName()).append("[");
|
||||
properties.forEach((key, value) -> builder.append("[").append(key).append(" : ").append(value)
|
||||
.append("]"));
|
||||
properties.entrySet()
|
||||
.forEach(e -> builder.append("[").append(e.getKey()).append(" : ").append(e.getValue()).append("]"));
|
||||
builder.append("]");
|
||||
return builder.toString();
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,61 +20,72 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import com.iluwatar.abstractdocument.domain.Car;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import com.iluwatar.abstractdocument.domain.HasModel;
|
||||
import com.iluwatar.abstractdocument.domain.HasParts;
|
||||
import com.iluwatar.abstractdocument.domain.HasPrice;
|
||||
import com.iluwatar.abstractdocument.domain.HasType;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import java.util.Arrays;
|
||||
import java.util.HashMap;
|
||||
import java.util.Map;
|
||||
|
||||
/**
|
||||
* The Abstract Document pattern enables handling additional, non-static properties. This pattern
|
||||
* uses concept of traits to enable type safety and separate properties of different classes into
|
||||
* set of interfaces.
|
||||
*
|
||||
* <p>In Abstract Document pattern,({@link AbstractDocument}) fully implements {@link Document})
|
||||
* interface. Traits are then defined to enable access to properties in usual, static way.
|
||||
* The Abstract Document pattern enables handling additional, non-static
|
||||
* properties. This pattern uses concept of traits to enable type safety and
|
||||
* separate properties of different classes into set of interfaces.
|
||||
* <p>
|
||||
* <p>
|
||||
* In Abstract Document pattern,({@link AbstractDocument}) fully implements
|
||||
* {@link Document}) interface. Traits are then defined to enable access to
|
||||
* properties in usual, static way.
|
||||
*/
|
||||
public class App {
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
|
||||
|
||||
/**
|
||||
* Program entry point.
|
||||
* Executes the App
|
||||
*/
|
||||
public App() {
|
||||
LOGGER.info("Constructing parts and car");
|
||||
|
||||
Map<String, Object> carProperties = new HashMap<>();
|
||||
carProperties.put(HasModel.PROPERTY, "300SL");
|
||||
carProperties.put(HasPrice.PROPERTY, 10000L);
|
||||
|
||||
Map<String, Object> wheelProperties = new HashMap<>();
|
||||
wheelProperties.put(HasType.PROPERTY, "wheel");
|
||||
wheelProperties.put(HasModel.PROPERTY, "15C");
|
||||
wheelProperties.put(HasPrice.PROPERTY, 100L);
|
||||
|
||||
Map<String, Object> doorProperties = new HashMap<>();
|
||||
doorProperties.put(HasType.PROPERTY, "door");
|
||||
doorProperties.put(HasModel.PROPERTY, "Lambo");
|
||||
doorProperties.put(HasPrice.PROPERTY, 300L);
|
||||
|
||||
carProperties.put(HasParts.PROPERTY, Arrays.asList(wheelProperties, doorProperties));
|
||||
|
||||
Car car = new Car(carProperties);
|
||||
|
||||
LOGGER.info("Here is our car:");
|
||||
LOGGER.info("-> model: {}", car.getModel().get());
|
||||
LOGGER.info("-> price: {}", car.getPrice().get());
|
||||
LOGGER.info("-> parts: ");
|
||||
car.getParts().forEach(p -> LOGGER.info("\t{}/{}/{}", p.getType().get(), p.getModel().get(), p.getPrice().get()));
|
||||
}
|
||||
|
||||
/**
|
||||
* Program entry point
|
||||
*
|
||||
* @param args command line args
|
||||
*/
|
||||
public static void main(String[] args) {
|
||||
LOGGER.info("Constructing parts and car");
|
||||
|
||||
var wheelProperties = Map.of(
|
||||
Property.TYPE.toString(), "wheel",
|
||||
Property.MODEL.toString(), "15C",
|
||||
Property.PRICE.toString(), 100L);
|
||||
|
||||
var doorProperties = Map.of(
|
||||
Property.TYPE.toString(), "door",
|
||||
Property.MODEL.toString(), "Lambo",
|
||||
Property.PRICE.toString(), 300L);
|
||||
|
||||
var carProperties = Map.of(
|
||||
Property.MODEL.toString(), "300SL",
|
||||
Property.PRICE.toString(), 10000L,
|
||||
Property.PARTS.toString(), List.of(wheelProperties, doorProperties));
|
||||
|
||||
var car = new Car(carProperties);
|
||||
|
||||
LOGGER.info("Here is our car:");
|
||||
LOGGER.info("-> model: {}", car.getModel().orElseThrow());
|
||||
LOGGER.info("-> price: {}", car.getPrice().orElseThrow());
|
||||
LOGGER.info("-> parts: ");
|
||||
car.getParts().forEach(p -> LOGGER.info("\t{}/{}/{}",
|
||||
p.getType().orElse(null),
|
||||
p.getModel().orElse(null),
|
||||
p.getPrice().orElse(null))
|
||||
);
|
||||
new App();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import java.util.Map;
|
||||
@ -28,12 +27,12 @@ import java.util.function.Function;
|
||||
import java.util.stream.Stream;
|
||||
|
||||
/**
|
||||
* Document interface.
|
||||
* Document interface
|
||||
*/
|
||||
public interface Document {
|
||||
|
||||
/**
|
||||
* Puts the value related to the key.
|
||||
* Puts the value related to the key
|
||||
*
|
||||
* @param key element key
|
||||
* @param value element value
|
||||
@ -42,7 +41,7 @@ public interface Document {
|
||||
Void put(String key, Object value);
|
||||
|
||||
/**
|
||||
* Gets the value for the key.
|
||||
* Gets the value for the key
|
||||
*
|
||||
* @param key element key
|
||||
* @return value or null
|
||||
@ -50,7 +49,7 @@ public interface Document {
|
||||
Object get(String key);
|
||||
|
||||
/**
|
||||
* Gets the stream of child documents.
|
||||
* Gets the stream of child documents
|
||||
*
|
||||
* @param key element key
|
||||
* @param constructor constructor of child class
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,14 +20,14 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.AbstractDocument;
|
||||
import java.util.Map;
|
||||
|
||||
import com.iluwatar.abstractdocument.AbstractDocument;
|
||||
|
||||
/**
|
||||
* Car entity.
|
||||
* Car entity
|
||||
*/
|
||||
public class Car extends AbstractDocument implements HasModel, HasPrice, HasParts {
|
||||
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,20 +20,21 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
import java.util.Optional;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
|
||||
/**
|
||||
* HasModel trait for static access to 'model' property.
|
||||
* HasModel trait for static access to 'model' property
|
||||
*/
|
||||
public interface HasModel extends Document {
|
||||
|
||||
String PROPERTY = "model";
|
||||
|
||||
default Optional<String> getModel() {
|
||||
return Optional.ofNullable((String) get(Property.MODEL.toString()));
|
||||
return Optional.ofNullable((String) get(PROPERTY));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,20 +20,21 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
import java.util.stream.Stream;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
|
||||
/**
|
||||
* HasParts trait for static access to 'parts' property.
|
||||
* HasParts trait for static access to 'parts' property
|
||||
*/
|
||||
public interface HasParts extends Document {
|
||||
|
||||
String PROPERTY = "parts";
|
||||
|
||||
default Stream<Part> getParts() {
|
||||
return children(Property.PARTS.toString(), Part::new);
|
||||
return children(PROPERTY, Part::new);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,20 +20,21 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
import java.util.Optional;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
|
||||
/**
|
||||
* HasPrice trait for static access to 'price' property.
|
||||
* HasPrice trait for static access to 'price' property
|
||||
*/
|
||||
public interface HasPrice extends Document {
|
||||
|
||||
String PROPERTY = "price";
|
||||
|
||||
default Optional<Number> getPrice() {
|
||||
return Optional.ofNullable((Number) get(Property.PRICE.toString()));
|
||||
return Optional.ofNullable((Number) get(PROPERTY));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,20 +20,21 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.Document;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
|
||||
import java.util.Optional;
|
||||
|
||||
/**
|
||||
* HasType trait for static access to 'type' property.
|
||||
* HasType trait for static access to 'type' property
|
||||
*/
|
||||
public interface HasType extends Document {
|
||||
|
||||
String PROPERTY = "type";
|
||||
|
||||
default Optional<String> getType() {
|
||||
return Optional.ofNullable((String) get(Property.TYPE.toString()));
|
||||
return Optional.ofNullable((String) get(PROPERTY));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,14 +20,14 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain;
|
||||
|
||||
import com.iluwatar.abstractdocument.AbstractDocument;
|
||||
import java.util.Map;
|
||||
|
||||
import com.iluwatar.abstractdocument.AbstractDocument;
|
||||
|
||||
/**
|
||||
* Part entity.
|
||||
* Part entity
|
||||
*/
|
||||
public class Part extends AbstractDocument implements HasType, HasModel, HasPrice {
|
||||
|
||||
|
||||
@ -1,32 +0,0 @@
|
||||
/*
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument.domain.enums;
|
||||
|
||||
/**
|
||||
* Enum To Describe Property type.
|
||||
*/
|
||||
public enum Property {
|
||||
|
||||
PARTS, TYPE, PRICE, MODEL
|
||||
}
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,17 +20,18 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertNotNull;
|
||||
import static org.junit.jupiter.api.Assertions.assertTrue;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import java.util.Arrays;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import java.util.stream.Stream;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertNotNull;
|
||||
|
||||
/**
|
||||
* AbstractDocument test class
|
||||
@ -40,14 +41,14 @@ public class AbstractDocumentTest {
|
||||
private static final String KEY = "key";
|
||||
private static final String VALUE = "value";
|
||||
|
||||
private static class DocumentImplementation extends AbstractDocument {
|
||||
private class DocumentImplementation extends AbstractDocument {
|
||||
|
||||
DocumentImplementation(Map<String, Object> properties) {
|
||||
super(properties);
|
||||
}
|
||||
}
|
||||
|
||||
private final DocumentImplementation document = new DocumentImplementation(new HashMap<>());
|
||||
private DocumentImplementation document = new DocumentImplementation(new HashMap<>());
|
||||
|
||||
@Test
|
||||
public void shouldPutAndGetValue() {
|
||||
@ -57,28 +58,31 @@ public class AbstractDocumentTest {
|
||||
|
||||
@Test
|
||||
public void shouldRetrieveChildren() {
|
||||
var children = List.of(Map.of(), Map.of());
|
||||
Map<String, Object> child1 = new HashMap<>();
|
||||
Map<String, Object> child2 = new HashMap<>();
|
||||
List<Map<String, Object>> children = Arrays.asList(child1, child2);
|
||||
|
||||
document.put(KEY, children);
|
||||
|
||||
var childrenStream = document.children(KEY, DocumentImplementation::new);
|
||||
Stream<DocumentImplementation> childrenStream = document.children(KEY, DocumentImplementation::new);
|
||||
assertNotNull(children);
|
||||
assertEquals(2, childrenStream.count());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void shouldRetrieveEmptyStreamForNonExistingChildren() {
|
||||
var children = document.children(KEY, DocumentImplementation::new);
|
||||
Stream<DocumentImplementation> children = document.children(KEY, DocumentImplementation::new);
|
||||
assertNotNull(children);
|
||||
assertEquals(0, children.count());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void shouldIncludePropsInToString() {
|
||||
var props = Map.of(KEY, (Object) VALUE);
|
||||
var document = new DocumentImplementation(props);
|
||||
assertTrue(document.toString().contains(KEY));
|
||||
assertTrue(document.toString().contains(VALUE));
|
||||
Map<String, Object> props = new HashMap<>();
|
||||
props.put(KEY, VALUE);
|
||||
DocumentImplementation document = new DocumentImplementation(props);
|
||||
assertNotNull(document.toString().contains(KEY));
|
||||
assertNotNull(document.toString().contains(VALUE));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,28 +20,18 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
|
||||
|
||||
/**
|
||||
* Simple App test
|
||||
*/
|
||||
class AppTest {
|
||||
|
||||
/**
|
||||
* Issue: Add at least one assertion to this test case.
|
||||
*
|
||||
* Solution: Inserted assertion to check whether the execution of the main method in {@link App}
|
||||
* throws an exception.
|
||||
*/
|
||||
public class AppTest {
|
||||
|
||||
@Test
|
||||
void shouldExecuteAppWithoutException() {
|
||||
assertDoesNotThrow(() -> App.main(null));
|
||||
public void shouldExecuteAppWithoutException() {
|
||||
App.main(null);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,18 +20,22 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractdocument;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
|
||||
import com.iluwatar.abstractdocument.domain.Car;
|
||||
import com.iluwatar.abstractdocument.domain.HasModel;
|
||||
import com.iluwatar.abstractdocument.domain.HasParts;
|
||||
import com.iluwatar.abstractdocument.domain.HasPrice;
|
||||
import com.iluwatar.abstractdocument.domain.HasType;
|
||||
import com.iluwatar.abstractdocument.domain.Part;
|
||||
import com.iluwatar.abstractdocument.domain.enums.Property;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import java.util.Arrays;
|
||||
import java.util.HashMap;
|
||||
import java.util.Map;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
|
||||
/**
|
||||
* Test for Part and Car
|
||||
*/
|
||||
@ -46,27 +50,27 @@ public class DomainTest {
|
||||
|
||||
@Test
|
||||
public void shouldConstructPart() {
|
||||
var partProperties = Map.of(
|
||||
Property.TYPE.toString(), TEST_PART_TYPE,
|
||||
Property.MODEL.toString(), TEST_PART_MODEL,
|
||||
Property.PRICE.toString(), (Object) TEST_PART_PRICE
|
||||
);
|
||||
var part = new Part(partProperties);
|
||||
assertEquals(TEST_PART_TYPE, part.getType().orElseThrow());
|
||||
assertEquals(TEST_PART_MODEL, part.getModel().orElseThrow());
|
||||
assertEquals(TEST_PART_PRICE, part.getPrice().orElseThrow());
|
||||
Map<String, Object> partProperties = new HashMap<>();
|
||||
partProperties.put(HasType.PROPERTY, TEST_PART_TYPE);
|
||||
partProperties.put(HasModel.PROPERTY, TEST_PART_MODEL);
|
||||
partProperties.put(HasPrice.PROPERTY, TEST_PART_PRICE);
|
||||
Part part = new Part(partProperties);
|
||||
|
||||
assertEquals(TEST_PART_TYPE, part.getType().get());
|
||||
assertEquals(TEST_PART_MODEL, part.getModel().get());
|
||||
assertEquals(TEST_PART_PRICE, part.getPrice().get());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void shouldConstructCar() {
|
||||
var carProperties = Map.of(
|
||||
Property.MODEL.toString(), TEST_CAR_MODEL,
|
||||
Property.PRICE.toString(), TEST_CAR_PRICE,
|
||||
Property.PARTS.toString(), List.of(Map.of(), Map.of())
|
||||
);
|
||||
var car = new Car(carProperties);
|
||||
assertEquals(TEST_CAR_MODEL, car.getModel().orElseThrow());
|
||||
assertEquals(TEST_CAR_PRICE, car.getPrice().orElseThrow());
|
||||
Map<String, Object> carProperties = new HashMap<>();
|
||||
carProperties.put(HasModel.PROPERTY, TEST_CAR_MODEL);
|
||||
carProperties.put(HasPrice.PROPERTY, TEST_CAR_PRICE);
|
||||
carProperties.put(HasParts.PROPERTY, Arrays.asList(new HashMap<>(), new HashMap<>()));
|
||||
Car car = new Car(carProperties);
|
||||
|
||||
assertEquals(TEST_CAR_MODEL, car.getModel().get());
|
||||
assertEquals(TEST_CAR_PRICE, car.getPrice().get());
|
||||
assertEquals(2, car.getParts().count());
|
||||
}
|
||||
|
||||
|
||||
@ -5,23 +5,22 @@ folder: abstract-factory
|
||||
permalink: /patterns/abstract-factory/
|
||||
categories: Creational
|
||||
tags:
|
||||
- Gang of Four
|
||||
- Java
|
||||
- Gang Of Four
|
||||
- Difficulty-Intermediate
|
||||
---
|
||||
|
||||
## Also known as
|
||||
|
||||
Kit
|
||||
|
||||
## Intent
|
||||
|
||||
Provide an interface for creating families of related or dependent
|
||||
objects without specifying their concrete classes.
|
||||
|
||||
## Explanation
|
||||
|
||||
Real world example
|
||||
|
||||
> To create a kingdom we need objects with a common theme. Elven kingdom needs an Elven king, Elven castle and Elven army whereas Orcish kingdom needs an Orcish king, Orcish castle and Orcish army. There is a dependency between the objects in the kingdom.
|
||||
> To create a kingdom we need objects with common theme. Elven kingdom needs an Elven king, Elven castle and Elven army whereas Orcish kingdom needs an Orcish king, Orcish castle and Orcish army. There is a dependency between the objects in the kingdom.
|
||||
|
||||
In plain words
|
||||
|
||||
@ -33,18 +32,15 @@ Wikipedia says
|
||||
|
||||
**Programmatic Example**
|
||||
|
||||
Translating the kingdom example above. First of all we have some interfaces and implementation for the objects in the
|
||||
kingdom.
|
||||
Translating the kingdom example above. First of all we have some interfaces and implementation for the objects in the kingdom
|
||||
|
||||
```java
|
||||
public interface Castle {
|
||||
String getDescription();
|
||||
}
|
||||
|
||||
public interface King {
|
||||
String getDescription();
|
||||
}
|
||||
|
||||
public interface Army {
|
||||
String getDescription();
|
||||
}
|
||||
@ -72,7 +68,7 @@ public class ElfArmy implements Army {
|
||||
}
|
||||
}
|
||||
|
||||
// Orcish implementations similarly -> ...
|
||||
// Orcish implementations similarly...
|
||||
|
||||
```
|
||||
|
||||
@ -113,22 +109,14 @@ public class OrcKingdomFactory implements KingdomFactory {
|
||||
Now we have our abstract factory that lets us make family of related objects i.e. Elven kingdom factory creates Elven castle, king and army etc.
|
||||
|
||||
```java
|
||||
var factory = new ElfKingdomFactory();
|
||||
var castle = factory.createCastle();
|
||||
var king = factory.createKing();
|
||||
var army = factory.createArmy();
|
||||
KingdomFactory factory = new ElfKingdomFactory();
|
||||
Castle castle = factory.createCastle();
|
||||
King king = factory.createKing();
|
||||
Army army = factory.createArmy();
|
||||
|
||||
castle.getDescription();
|
||||
king.getDescription();
|
||||
army.getDescription();
|
||||
```
|
||||
|
||||
Program output:
|
||||
|
||||
```java
|
||||
This is the Elven castle!
|
||||
This is the Elven king!
|
||||
This is the Elven Army!
|
||||
castle.getDescription(); // Output: This is the Elven castle!
|
||||
king.getDescription(); // Output: This is the Elven king!
|
||||
army.getDescription(); // Output: This is the Elven Army!
|
||||
```
|
||||
|
||||
Now, we can design a factory for our different kingdom factories. In this example, we created FactoryMaker, responsible for returning an instance of either ElfKingdomFactory or OrcKingdomFactory.
|
||||
@ -155,7 +143,7 @@ public static class FactoryMaker {
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
var app = new App();
|
||||
App app = new App();
|
||||
|
||||
LOGGER.info("Elf Kingdom");
|
||||
app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
|
||||
@ -169,54 +157,43 @@ public static void main(String[] args) {
|
||||
}
|
||||
```
|
||||
|
||||
## Class diagram
|
||||
|
||||
|
||||
|
||||
|
||||
## Applicability
|
||||
|
||||
Use the Abstract Factory pattern when
|
||||
|
||||
* The system should be independent of how its products are created, composed and represented
|
||||
* The system should be configured with one of multiple families of products
|
||||
* The family of related product objects is designed to be used together, and you need to enforce this constraint
|
||||
* You want to provide a class library of products, and you want to reveal just their interfaces, not their implementations
|
||||
* The lifetime of the dependency is conceptually shorter than the lifetime of the consumer.
|
||||
* You need a run-time value to construct a particular dependency
|
||||
* You want to decide which product to call from a family at runtime.
|
||||
* You need to supply one or more parameters only known at run-time before you can resolve a dependency.
|
||||
* When you need consistency among products
|
||||
* You don’t want to change existing code when adding new products or families of products to the program.
|
||||
* a system should be independent of how its products are created, composed and represented
|
||||
* a system should be configured with one of multiple families of products
|
||||
* a family of related product objects is designed to be used together, and you need to enforce this constraint
|
||||
* you want to provide a class library of products, and you want to reveal just their interfaces, not their implementations
|
||||
* the lifetime of the dependency is conceptually shorter than the lifetime of the consumer.
|
||||
* you need a run-time value to construct a particular dependency
|
||||
* you want to decide which product to call from a family at runtime.
|
||||
* you need to supply one or more parameters only known at run-time before you can resolve a dependency.
|
||||
|
||||
Example use cases
|
||||
## Use Cases:
|
||||
|
||||
* Selecting to call to the appropriate implementation of FileSystemAcmeService or DatabaseAcmeService or NetworkAcmeService at runtime.
|
||||
* Unit test case writing becomes much easier
|
||||
* UI tools for different OS
|
||||
* Selecting to call the appropriate implementation of FileSystemAcmeService or DatabaseAcmeService or NetworkAcmeService at runtime.
|
||||
* Unit test case writing becomes much easier
|
||||
|
||||
## Consequences:
|
||||
|
||||
* Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time.
|
||||
* While the pattern is great when creating predefined objects, adding the new ones might be challenging.
|
||||
* The code becomes more complicated than it should be, since a lot of new interfaces and classes are introduced along with the pattern.
|
||||
* Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time.
|
||||
|
||||
|
||||
## Tutorial
|
||||
|
||||
* [Abstract Factory Pattern Tutorial](https://www.journaldev.com/1418/abstract-factory-design-pattern-in-java)
|
||||
|
||||
## Known uses
|
||||
## Presentations
|
||||
|
||||
* [Abstract Factory Pattern](etc/presentation.html)
|
||||
|
||||
|
||||
## Real world examples
|
||||
|
||||
* [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)
|
||||
* [javax.xml.transform.TransformerFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/transform/TransformerFactory.html#newInstance--)
|
||||
* [javax.xml.xpath.XPathFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathFactory.html#newInstance--)
|
||||
|
||||
## Related patterns
|
||||
|
||||
* [Factory Method](https://java-design-patterns.com/patterns/factory-method/)
|
||||
* [Factory Kit](https://java-design-patterns.com/patterns/factory-kit/)
|
||||
|
||||
## Credits
|
||||
|
||||
* [Design Patterns: Elements of Reusable Object-Oriented Software](https://www.amazon.com/gp/product/0201633612/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0201633612&linkCode=as2&tag=javadesignpat-20&linkId=675d49790ce11db99d90bde47f1aeb59)
|
||||
* [Head First Design Patterns: A Brain-Friendly Guide](https://www.amazon.com/gp/product/0596007124/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596007124&linkCode=as2&tag=javadesignpat-20&linkId=6b8b6eea86021af6c8e3cd3fc382cb5b)
|
||||
* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
|
||||
|
||||
Binary file not shown.
|
Before Width: | Height: | Size: 80 KiB |
@ -1,101 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.abstractfactory {
|
||||
class App {
|
||||
- LOGGER : Logger {static}
|
||||
- army : Army
|
||||
- castle : Castle
|
||||
- king : King
|
||||
+ App()
|
||||
+ createKingdom(factory : KingdomFactory)
|
||||
+ getArmy() : Army
|
||||
~ getArmy(factory : KingdomFactory) : Army
|
||||
+ getCastle() : Castle
|
||||
~ getCastle(factory : KingdomFactory) : Castle
|
||||
+ getKing() : King
|
||||
~ getKing(factory : KingdomFactory) : King
|
||||
+ main(args : String[]) {static}
|
||||
- setArmy(army : Army)
|
||||
- setCastle(castle : Castle)
|
||||
- setKing(king : King)
|
||||
}
|
||||
class FactoryMaker {
|
||||
+ FactoryMaker()
|
||||
+ makeFactory(type : KingdomType) : KingdomFactory {static}
|
||||
}
|
||||
enum KingdomType {
|
||||
+ ELF {static}
|
||||
+ ORC {static}
|
||||
+ valueOf(name : String) : KingdomType {static}
|
||||
+ values() : KingdomType[] {static}
|
||||
}
|
||||
interface Army {
|
||||
+ getDescription() : String {abstract}
|
||||
}
|
||||
interface Castle {
|
||||
+ getDescription() : String {abstract}
|
||||
}
|
||||
class ElfArmy {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ ElfArmy()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class ElfCastle {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ ElfCastle()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class ElfKing {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ ElfKing()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class ElfKingdomFactory {
|
||||
+ ElfKingdomFactory()
|
||||
+ createArmy() : Army
|
||||
+ createCastle() : Castle
|
||||
+ createKing() : King
|
||||
}
|
||||
interface King {
|
||||
+ getDescription() : String {abstract}
|
||||
}
|
||||
interface KingdomFactory {
|
||||
+ createArmy() : Army {abstract}
|
||||
+ createCastle() : Castle {abstract}
|
||||
+ createKing() : King {abstract}
|
||||
}
|
||||
class OrcArmy {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ OrcArmy()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class OrcCastle {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ OrcCastle()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class OrcKing {
|
||||
~ DESCRIPTION : String {static}
|
||||
+ OrcKing()
|
||||
+ getDescription() : String
|
||||
}
|
||||
class OrcKingdomFactory {
|
||||
+ OrcKingdomFactory()
|
||||
+ createArmy() : Army
|
||||
+ createCastle() : Castle
|
||||
+ createKing() : King
|
||||
}
|
||||
}
|
||||
KingdomType ..+ FactoryMaker
|
||||
App --> "-castle" Castle
|
||||
FactoryMaker ..+ App
|
||||
App --> "-king" King
|
||||
App --> "-army" Army
|
||||
ElfArmy ..|> Army
|
||||
ElfCastle ..|> Castle
|
||||
ElfKing ..|> King
|
||||
ElfKingdomFactory ..|> KingdomFactory
|
||||
OrcArmy ..|> Army
|
||||
OrcCastle ..|> Castle
|
||||
OrcKing ..|> King
|
||||
OrcKingdomFactory ..|> KingdomFactory
|
||||
@enduml
|
||||
BIN
abstract-factory/etc/diagram1.png
Normal file
BIN
abstract-factory/etc/diagram1.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 57 KiB |
BIN
abstract-factory/etc/diagram2.png
Normal file
BIN
abstract-factory/etc/diagram2.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 26 KiB |
190
abstract-factory/etc/presentation.html
Normal file
190
abstract-factory/etc/presentation.html
Normal file
@ -0,0 +1,190 @@
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2017 Rodolfo Forte
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>Design Patterns - Abstract Factory Presentation</title>
|
||||
<meta charset="utf-8">
|
||||
<style>
|
||||
@import url(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz);
|
||||
@import url(https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic);
|
||||
@import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
|
||||
|
||||
body { font-family: 'Droid Serif'; }
|
||||
h1, h2, h3 {
|
||||
font-family: 'Yanone Kaffeesatz';
|
||||
font-weight: normal;
|
||||
}
|
||||
.remark-code, .remark-inline-code { font-family: 'Ubuntu Mono'; }
|
||||
|
||||
blockquote {
|
||||
border-left: 0.3em solid rgba(0,0,0,0.5);
|
||||
padding: 0 15px;
|
||||
font-style: italic;
|
||||
}
|
||||
|
||||
img {
|
||||
max-width:100%;
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<textarea id="source">
|
||||
|
||||
class: center, middle
|
||||
|
||||
# Abstract Factory
|
||||
|
||||
---
|
||||
|
||||
# Also known as
|
||||
|
||||
* Kit
|
||||
|
||||
---
|
||||
|
||||
# Intent
|
||||
|
||||
* Provide an interface for creating families of related or dependent objects without specifying their concrete classes
|
||||
|
||||
---
|
||||
|
||||
# Explanation
|
||||
|
||||
* [Wikipedia](https://en.wikipedia.org/wiki/Abstract_factory_pattern) says:
|
||||
> "The abstract factory pattern provides a way to encapsulate a group of individual factories that have a common theme without specifying their concrete classes"
|
||||
|
||||
<br />
|
||||
|
||||
* In plain words:
|
||||
* A factory that groups individual but related/dependent factories together without specifying their concrete classes;
|
||||
* A factory of factories;
|
||||
|
||||
---
|
||||
|
||||
# Example
|
||||
|
||||
* In a factory that creates kingdoms, we need objects with common theme:
|
||||
|
||||
* Elven kingdom needs an Elven king, Elven castle and Elven army;
|
||||
|
||||
* Orcish kingdom needs an Orcish king, Orcish castle and Orcish army;
|
||||
|
||||
<br />
|
||||
|
||||
* There is a dependency between the objects in the kingdom;
|
||||
|
||||
---
|
||||
|
||||
# Diagram
|
||||
|
||||
* Based on the kingdom example, the diagram below showcases the different concrete factories and their concrete products:
|
||||
|
||||
.center[]
|
||||
|
||||
|
||||
---
|
||||
|
||||
# Diagram
|
||||
|
||||
* The class diagram below showcases the factory of factories;
|
||||
|
||||
* At runtime, we can define which Kingdom type is needed and pass it as a parameter to define which concrete KingdomFactory to instantiate;
|
||||
|
||||
* The concrete factory returned will then be able to produce the related objects of the specified type;
|
||||
|
||||
.center[]
|
||||
|
||||
---
|
||||
|
||||
# Applicability
|
||||
|
||||
Use the Abstract Factory pattern when:
|
||||
|
||||
* A system should be independent of how its products are created, composed and represented;
|
||||
|
||||
* A system should be configured with one of multiple families of products;
|
||||
|
||||
* A family of related product objects is designed to be used together, and you need to enforce this constraint;
|
||||
|
||||
* You want to provide a class library of products, and you want to reveal just their interfaces, not their implementations;
|
||||
|
||||
---
|
||||
|
||||
# Applicability
|
||||
|
||||
Use the Abstract Factory pattern when:
|
||||
|
||||
* The lifetime of the dependency is conceptually shorter than the lifetime of the consumer;
|
||||
|
||||
* You need a run-time value to construct a particular dependency;
|
||||
|
||||
* You want to decide which product to call from a family at runtime;
|
||||
|
||||
* You need to supply one or more parameters only known at run-time before you can resolve a dependency;
|
||||
|
||||
---
|
||||
|
||||
#Use Cases
|
||||
|
||||
* Selecting to call the appropriate implementation of FileSystemAcmeService or DatabaseAcmeService or NetworkAcmeService at runtime;
|
||||
* Unit test case writing becomes much easier;
|
||||
|
||||
---
|
||||
|
||||
# Consequences
|
||||
|
||||
* Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time
|
||||
|
||||
---
|
||||
|
||||
# Real world examples
|
||||
|
||||
[javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)
|
||||
|
||||
[javax.xml.transform.TransformerFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/transform/TransformerFactory.html#newInstance--)
|
||||
|
||||
[javax.xml.xpath.XPathFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathFactory.html#newInstance--)
|
||||
|
||||
---
|
||||
|
||||
# Credits
|
||||
|
||||
* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
|
||||
|
||||
---
|
||||
|
||||
# Tutorials
|
||||
|
||||
* Source code http://java-design-patterns.com/patterns/abstract-factory/
|
||||
|
||||
</textarea>
|
||||
<script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
|
||||
</script>
|
||||
<script>
|
||||
var slideshow = remark.create();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
@ -1,56 +1,47 @@
|
||||
<?xml version="1.0"?>
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<project
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
|
||||
xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>abstract-factory</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<!-- Maven assembly plugin is invoked with default setting which we have
|
||||
in parent pom and specifying the class having main method -->
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.abstractfactory.App</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>abstract-factory</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</project>
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,69 +20,128 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType;
|
||||
|
||||
/**
|
||||
* The Abstract Factory pattern provides a way to encapsulate a group of individual factories that
|
||||
* have a common theme without specifying their concrete classes. In normal usage, the client
|
||||
* software creates a concrete implementation of the abstract factory and then uses the generic
|
||||
* interface of the factory to create the concrete objects that are part of the theme. The client
|
||||
* does not know (or care) which concrete objects it gets from each of these internal factories,
|
||||
* since it uses only the generic interfaces of their products. This pattern separates the details
|
||||
* of implementation of a set of objects from their general usage and relies on object composition,
|
||||
* as object creation is implemented in methods exposed in the factory interface.
|
||||
*
|
||||
* <p>The essence of the Abstract Factory pattern is a factory interface ({@link KingdomFactory})
|
||||
* and its implementations ( {@link ElfKingdomFactory}, {@link OrcKingdomFactory}). The example uses
|
||||
* both concrete implementations to create a king, a castle and an army.
|
||||
*
|
||||
* The Abstract Factory pattern provides a way to encapsulate a group of individual factories that have a common theme
|
||||
* without specifying their concrete classes. In normal usage, the client software creates a concrete implementation of
|
||||
* the abstract factory and then uses the generic interface of the factory to create the concrete objects that are part
|
||||
* of the theme. The client does not know (or care) which concrete objects it gets from each of these internal
|
||||
* factories, since it uses only the generic interfaces of their products. This pattern separates the details of
|
||||
* implementation of a set of objects from their general usage and relies on object composition, as object creation is
|
||||
* implemented in methods exposed in the factory interface.
|
||||
* <p>
|
||||
* The essence of the Abstract Factory pattern is a factory interface ({@link KingdomFactory}) and its implementations (
|
||||
* {@link ElfKingdomFactory}, {@link OrcKingdomFactory}). The example uses both concrete implementations to create a
|
||||
* king, a castle and an army.
|
||||
*
|
||||
*/
|
||||
public class App implements Runnable {
|
||||
public class App {
|
||||
|
||||
private static Logger log = LoggerFactory.getLogger(App.class);
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
|
||||
|
||||
private final Kingdom kingdom = new Kingdom();
|
||||
private King king;
|
||||
private Castle castle;
|
||||
private Army army;
|
||||
|
||||
public Kingdom getKingdom() {
|
||||
return kingdom;
|
||||
/**
|
||||
* Creates kingdom
|
||||
*/
|
||||
public void createKingdom(final KingdomFactory factory) {
|
||||
setKing(factory.createKing());
|
||||
setCastle(factory.createCastle());
|
||||
setArmy(factory.createArmy());
|
||||
}
|
||||
|
||||
King getKing(final KingdomFactory factory) {
|
||||
return factory.createKing();
|
||||
}
|
||||
|
||||
public King getKing() {
|
||||
return king;
|
||||
}
|
||||
|
||||
private void setKing(final King king) {
|
||||
this.king = king;
|
||||
}
|
||||
|
||||
Castle getCastle(final KingdomFactory factory) {
|
||||
return factory.createCastle();
|
||||
}
|
||||
|
||||
public Castle getCastle() {
|
||||
return castle;
|
||||
}
|
||||
|
||||
private void setCastle(final Castle castle) {
|
||||
this.castle = castle;
|
||||
}
|
||||
|
||||
Army getArmy(final KingdomFactory factory) {
|
||||
return factory.createArmy();
|
||||
}
|
||||
|
||||
public Army getArmy() {
|
||||
return army;
|
||||
}
|
||||
|
||||
private void setArmy(final Army army) {
|
||||
this.army = army;
|
||||
}
|
||||
|
||||
/**
|
||||
* The factory of kingdom factories.
|
||||
*/
|
||||
public static class FactoryMaker {
|
||||
|
||||
/**
|
||||
* Enumeration for the different types of Kingdoms.
|
||||
*/
|
||||
public enum KingdomType {
|
||||
ELF, ORC
|
||||
}
|
||||
|
||||
/**
|
||||
* The factory method to create KingdomFactory concrete objects.
|
||||
*/
|
||||
public static KingdomFactory makeFactory(KingdomType type) {
|
||||
switch (type) {
|
||||
case ELF:
|
||||
return new ElfKingdomFactory();
|
||||
case ORC:
|
||||
return new OrcKingdomFactory();
|
||||
default:
|
||||
throw new IllegalArgumentException("KingdomType not supported.");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Program entry point.
|
||||
*
|
||||
* @param args command line args
|
||||
*
|
||||
* @param args
|
||||
* command line args
|
||||
*/
|
||||
public static void main(String[] args) {
|
||||
var app = new App();
|
||||
app.run();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
log.info("Elf Kingdom");
|
||||
createKingdom(Kingdom.FactoryMaker.KingdomType.ELF);
|
||||
log.info(kingdom.getArmy().getDescription());
|
||||
log.info(kingdom.getCastle().getDescription());
|
||||
log.info(kingdom.getKing().getDescription());
|
||||
App app = new App();
|
||||
|
||||
log.info("Orc Kingdom");
|
||||
createKingdom(Kingdom.FactoryMaker.KingdomType.ORC);
|
||||
log.info(kingdom.getArmy().getDescription());
|
||||
log.info(kingdom.getCastle().getDescription());
|
||||
log.info(kingdom.getKing().getDescription());
|
||||
}
|
||||
LOGGER.info("Elf Kingdom");
|
||||
app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
|
||||
LOGGER.info(app.getArmy().getDescription());
|
||||
LOGGER.info(app.getCastle().getDescription());
|
||||
LOGGER.info(app.getKing().getDescription());
|
||||
|
||||
/**
|
||||
* Creates kingdom.
|
||||
* @param kingdomType type of Kingdom
|
||||
*/
|
||||
public void createKingdom(final Kingdom.FactoryMaker.KingdomType kingdomType) {
|
||||
final KingdomFactory kingdomFactory = Kingdom.FactoryMaker.makeFactory(kingdomType);
|
||||
kingdom.setKing(kingdomFactory.createKing());
|
||||
kingdom.setCastle(kingdomFactory.createCastle());
|
||||
kingdom.setArmy(kingdomFactory.createArmy());
|
||||
LOGGER.info("Orc Kingdom");
|
||||
app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC));
|
||||
LOGGER.info(app.getArmy().getDescription());
|
||||
LOGGER.info(app.getCastle().getDescription());
|
||||
LOGGER.info(app.getKing().getDescription());
|
||||
}
|
||||
}
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* Army interface.
|
||||
*
|
||||
* Army interface
|
||||
*
|
||||
*/
|
||||
public interface Army {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* Castle interface.
|
||||
*
|
||||
* Castle interface
|
||||
*
|
||||
*/
|
||||
public interface Castle {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* ElfArmy.
|
||||
*
|
||||
* ElfArmy
|
||||
*
|
||||
*/
|
||||
public class ElfArmy implements Army {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* ElfCastle.
|
||||
*
|
||||
* ElfCastle
|
||||
*
|
||||
*/
|
||||
public class ElfCastle implements Castle {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* ElfKing.
|
||||
*
|
||||
* ElfKing
|
||||
*
|
||||
*/
|
||||
public class ElfKing implements King {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,25 +20,23 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
*
|
||||
* ElfKingdomFactory concrete factory.
|
||||
*
|
||||
*/
|
||||
public class ElfKingdomFactory implements KingdomFactory {
|
||||
|
||||
@Override
|
||||
public Castle createCastle() {
|
||||
return new ElfCastle();
|
||||
}
|
||||
|
||||
@Override
|
||||
public King createKing() {
|
||||
return new ElfKing();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Army createArmy() {
|
||||
return new ElfArmy();
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* King interface.
|
||||
*
|
||||
* King interface
|
||||
*
|
||||
*/
|
||||
public interface King {
|
||||
|
||||
|
||||
@ -1,82 +0,0 @@
|
||||
/*
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
public class Kingdom {
|
||||
|
||||
private King king;
|
||||
private Castle castle;
|
||||
private Army army;
|
||||
|
||||
public King getKing() {
|
||||
return king;
|
||||
}
|
||||
|
||||
public Castle getCastle() {
|
||||
return castle;
|
||||
}
|
||||
|
||||
public Army getArmy() {
|
||||
return army;
|
||||
}
|
||||
|
||||
public void setKing(King king) {
|
||||
this.king = king;
|
||||
}
|
||||
|
||||
public void setCastle(Castle castle) {
|
||||
this.castle = castle;
|
||||
}
|
||||
|
||||
public void setArmy(Army army) {
|
||||
this.army = army;
|
||||
}
|
||||
|
||||
/**
|
||||
* The factory of kingdom factories.
|
||||
*/
|
||||
public static class FactoryMaker {
|
||||
|
||||
/**
|
||||
* Enumeration for the different types of Kingdoms.
|
||||
*/
|
||||
public enum KingdomType {
|
||||
ELF, ORC
|
||||
}
|
||||
|
||||
/**
|
||||
* The factory method to create KingdomFactory concrete objects.
|
||||
*/
|
||||
public static KingdomFactory makeFactory(KingdomType type) {
|
||||
switch (type) {
|
||||
case ELF:
|
||||
return new ElfKingdomFactory();
|
||||
case ORC:
|
||||
return new OrcKingdomFactory();
|
||||
default:
|
||||
throw new IllegalArgumentException("KingdomType not supported.");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
*
|
||||
* KingdomFactory factory interface.
|
||||
*
|
||||
*/
|
||||
public interface KingdomFactory {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* OrcArmy.
|
||||
*
|
||||
* OrcArmy
|
||||
*
|
||||
*/
|
||||
public class OrcArmy implements Army {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* OrcCastle.
|
||||
*
|
||||
* OrcCastle
|
||||
*
|
||||
*/
|
||||
public class OrcCastle implements Castle {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
* OrcKing.
|
||||
*
|
||||
* OrcKing
|
||||
*
|
||||
*/
|
||||
public class OrcKing implements King {
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,25 +20,23 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
/**
|
||||
*
|
||||
* OrcKingdomFactory concrete factory.
|
||||
*
|
||||
*/
|
||||
public class OrcKingdomFactory implements KingdomFactory {
|
||||
|
||||
@Override
|
||||
public Castle createCastle() {
|
||||
return new OrcCastle();
|
||||
}
|
||||
|
||||
@Override
|
||||
public King createKing() {
|
||||
return new OrcKing();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Army createArmy() {
|
||||
return new OrcArmy();
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,74 +20,68 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertTrue;
|
||||
|
||||
import com.iluwatar.abstractfactory.App.FactoryMaker;
|
||||
import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType;
|
||||
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
/**
|
||||
* Test for abstract factory.
|
||||
* Test for abstract factory
|
||||
*/
|
||||
public class AbstractFactoryTest {
|
||||
|
||||
private final App app = new App();
|
||||
private App app = new App();
|
||||
private KingdomFactory elfFactory;
|
||||
private KingdomFactory orcFactory;
|
||||
|
||||
@BeforeEach
|
||||
public void setUp() {
|
||||
elfFactory = FactoryMaker.makeFactory(KingdomType.ELF);
|
||||
orcFactory = FactoryMaker.makeFactory(KingdomType.ORC);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void king() {
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ELF);
|
||||
final var kingdom = app.getKingdom();
|
||||
|
||||
final var elfKing = kingdom.getKing();
|
||||
final King elfKing = app.getKing(elfFactory);
|
||||
assertTrue(elfKing instanceof ElfKing);
|
||||
assertEquals(ElfKing.DESCRIPTION, elfKing.getDescription());
|
||||
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ORC);
|
||||
final var orcKing = kingdom.getKing();
|
||||
final King orcKing = app.getKing(orcFactory);
|
||||
assertTrue(orcKing instanceof OrcKing);
|
||||
assertEquals(OrcKing.DESCRIPTION, orcKing.getDescription());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void castle() {
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ELF);
|
||||
final var kingdom = app.getKingdom();
|
||||
|
||||
final var elfCastle = kingdom.getCastle();
|
||||
final Castle elfCastle = app.getCastle(elfFactory);
|
||||
assertTrue(elfCastle instanceof ElfCastle);
|
||||
assertEquals(ElfCastle.DESCRIPTION, elfCastle.getDescription());
|
||||
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ORC);
|
||||
final var orcCastle = kingdom.getCastle();
|
||||
final Castle orcCastle = app.getCastle(orcFactory);
|
||||
assertTrue(orcCastle instanceof OrcCastle);
|
||||
assertEquals(OrcCastle.DESCRIPTION, orcCastle.getDescription());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void army() {
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ELF);
|
||||
final var kingdom = app.getKingdom();
|
||||
|
||||
final var elfArmy = kingdom.getArmy();
|
||||
final Army elfArmy = app.getArmy(elfFactory);
|
||||
assertTrue(elfArmy instanceof ElfArmy);
|
||||
assertEquals(ElfArmy.DESCRIPTION, elfArmy.getDescription());
|
||||
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ORC);
|
||||
final var orcArmy = kingdom.getArmy();
|
||||
final Army orcArmy = app.getArmy(orcFactory);
|
||||
assertTrue(orcArmy instanceof OrcArmy);
|
||||
assertEquals(OrcArmy.DESCRIPTION, orcArmy.getDescription());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void createElfKingdom() {
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ELF);
|
||||
final var kingdom = app.getKingdom();
|
||||
|
||||
final var king = kingdom.getKing();
|
||||
final var castle = kingdom.getCastle();
|
||||
final var army = kingdom.getArmy();
|
||||
app.createKingdom(elfFactory);
|
||||
final King king = app.getKing();
|
||||
final Castle castle = app.getCastle();
|
||||
final Army army = app.getArmy();
|
||||
assertTrue(king instanceof ElfKing);
|
||||
assertEquals(ElfKing.DESCRIPTION, king.getDescription());
|
||||
assertTrue(castle instanceof ElfCastle);
|
||||
@ -98,12 +92,10 @@ public class AbstractFactoryTest {
|
||||
|
||||
@Test
|
||||
public void createOrcKingdom() {
|
||||
app.createKingdom(Kingdom.FactoryMaker.KingdomType.ORC);
|
||||
final var kingdom = app.getKingdom();
|
||||
|
||||
final var king = kingdom.getKing();
|
||||
final var castle = kingdom.getCastle();
|
||||
final var army = kingdom.getArmy();
|
||||
app.createKingdom(orcFactory);
|
||||
final King king = app.getKing();
|
||||
final Castle castle = app.getCastle();
|
||||
final Army army = app.getArmy();
|
||||
assertTrue(king instanceof OrcKing);
|
||||
assertEquals(OrcKing.DESCRIPTION, king.getDescription());
|
||||
assertTrue(castle instanceof OrcCastle);
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,28 +20,19 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.abstractfactory;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
|
||||
import java.io.IOException;
|
||||
|
||||
/**
|
||||
* Tests that Abstract Factory example runs without errors.
|
||||
*/
|
||||
class AppTest {
|
||||
|
||||
/**
|
||||
* Issue: Add at least one assertion to this test case.
|
||||
*
|
||||
* Solution: Inserted assertion to check whether the execution of the main method in {@link App}
|
||||
* throws an exception.
|
||||
*/
|
||||
|
||||
public class AppTest {
|
||||
@Test
|
||||
void shouldExecuteApplicationWithoutException() {
|
||||
|
||||
assertDoesNotThrow(() -> App.main(new String[]{}));
|
||||
public void test() throws IOException {
|
||||
String[] args = {};
|
||||
App.main(args);
|
||||
}
|
||||
}
|
||||
|
||||
@ -5,132 +5,17 @@ folder: acyclic-visitor
|
||||
permalink: /patterns/acyclic-visitor/
|
||||
categories: Behavioral
|
||||
tags:
|
||||
- Extensibility
|
||||
- Java
|
||||
- Difficulty-Intermediate
|
||||
---
|
||||
|
||||
## Intent
|
||||
|
||||
Allow new functions to be added to existing class hierarchies without affecting those hierarchies, and without creating
|
||||
the troublesome dependency cycles that are inherent to the GoF Visitor Pattern.
|
||||
|
||||
## Explanation
|
||||
|
||||
Real world example
|
||||
|
||||
> We have a hierarchy of modem classes. The modems in this hierarchy need to be visited by an external algorithm based
|
||||
> on filtering criteria (is it Unix or DOS compatible modem).
|
||||
|
||||
In plain words
|
||||
|
||||
> Acyclic Visitor allows functions to be added to existing class hierarchies without modifying the hierarchies.
|
||||
|
||||
[WikiWikiWeb](https://wiki.c2.com/?AcyclicVisitor) says
|
||||
|
||||
> The Acyclic Visitor pattern allows new functions to be added to existing class hierarchies without affecting those
|
||||
> hierarchies, and without creating the dependency cycles that are inherent to the GangOfFour VisitorPattern.
|
||||
|
||||
**Programmatic Example**
|
||||
|
||||
Here's the `Modem` hierarchy.
|
||||
|
||||
```java
|
||||
public abstract class Modem {
|
||||
public abstract void accept(ModemVisitor modemVisitor);
|
||||
}
|
||||
|
||||
public class Zoom extends Modem {
|
||||
...
|
||||
@Override
|
||||
public void accept(ModemVisitor modemVisitor) {
|
||||
if (modemVisitor instanceof ZoomVisitor) {
|
||||
((ZoomVisitor) modemVisitor).visit(this);
|
||||
} else {
|
||||
LOGGER.info("Only ZoomVisitor is allowed to visit Zoom modem");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public class Hayes extends Modem {
|
||||
...
|
||||
@Override
|
||||
public void accept(ModemVisitor modemVisitor) {
|
||||
if (modemVisitor instanceof HayesVisitor) {
|
||||
((HayesVisitor) modemVisitor).visit(this);
|
||||
} else {
|
||||
LOGGER.info("Only HayesVisitor is allowed to visit Hayes modem");
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Next we introduce the `ModemVisitor` hierarchy.
|
||||
|
||||
```java
|
||||
public interface ModemVisitor {
|
||||
}
|
||||
|
||||
public interface HayesVisitor extends ModemVisitor {
|
||||
void visit(Hayes hayes);
|
||||
}
|
||||
|
||||
public interface ZoomVisitor extends ModemVisitor {
|
||||
void visit(Zoom zoom);
|
||||
}
|
||||
|
||||
public interface AllModemVisitor extends ZoomVisitor, HayesVisitor {
|
||||
}
|
||||
|
||||
public class ConfigureForDosVisitor implements AllModemVisitor {
|
||||
...
|
||||
@Override
|
||||
public void visit(Hayes hayes) {
|
||||
LOGGER.info(hayes + " used with Dos configurator.");
|
||||
}
|
||||
@Override
|
||||
public void visit(Zoom zoom) {
|
||||
LOGGER.info(zoom + " used with Dos configurator.");
|
||||
}
|
||||
}
|
||||
|
||||
public class ConfigureForUnixVisitor implements ZoomVisitor {
|
||||
...
|
||||
@Override
|
||||
public void visit(Zoom zoom) {
|
||||
LOGGER.info(zoom + " used with Unix configurator.");
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Finally, here are the visitors in action.
|
||||
|
||||
```java
|
||||
var conUnix = new ConfigureForUnixVisitor();
|
||||
var conDos = new ConfigureForDosVisitor();
|
||||
var zoom = new Zoom();
|
||||
var hayes = new Hayes();
|
||||
hayes.accept(conDos);
|
||||
zoom.accept(conDos);
|
||||
hayes.accept(conUnix);
|
||||
zoom.accept(conUnix);
|
||||
```
|
||||
|
||||
Program output:
|
||||
|
||||
```
|
||||
// Hayes modem used with Dos configurator.
|
||||
// Zoom modem used with Dos configurator.
|
||||
// Only HayesVisitor is allowed to visit Hayes modem
|
||||
// Zoom modem used with Unix configurator.
|
||||
```
|
||||
|
||||
## Class diagram
|
||||
|
||||
|
||||
|
||||
## Intent
|
||||
Allow new functions to be added to existing class hierarchies without affecting those hierarchies, and without creating the troublesome dependency cycles that are inherent to the GOF VISITOR Pattern.
|
||||
|
||||
## Applicability
|
||||
|
||||
This pattern can be used:
|
||||
|
||||
* When you need to add a new function to an existing hierarchy without the need to alter or affect that hierarchy.
|
||||
* When there are functions that operate upon a hierarchy, but which do not belong in the hierarchy itself. e.g. the ConfigureForDOS / ConfigureForUnix / ConfigureForX issue.
|
||||
* When you need to perform very different operations on an object depending upon its type.
|
||||
@ -138,23 +23,17 @@ This pattern can be used:
|
||||
* When the recompilation, relinking, retesting or redistribution of the derivatives of Element is very expensive.
|
||||
|
||||
## Consequences
|
||||
|
||||
The good:
|
||||
|
||||
* No dependency cycles between class hierarchies.
|
||||
* No need to recompile all the visitors if a new one is added.
|
||||
* Does not cause compilation failure in existing visitors if class hierarchy has a new member.
|
||||
|
||||
The bad:
|
||||
|
||||
* Violates [Liskov's Substitution Principle](https://java-design-patterns.com/principles/#liskov-substitution-principle) by showing that it can accept all visitors but actually only being interested in particular visitors.
|
||||
* Violates the principle of least surprise or Liskov's Substitution principle by showing that it can accept all visitors but actually only being interested in particular visitors.
|
||||
* Parallel hierarchy of visitors has to be created for all members in visitable class hierarchy.
|
||||
|
||||
## Related patterns
|
||||
|
||||
* [Visitor Pattern](https://java-design-patterns.com/patterns/visitor/)
|
||||
* [Visitor Pattern](../visitor/README.md)
|
||||
|
||||
## Credits
|
||||
|
||||
* [Acyclic Visitor by Robert C. Martin](http://condor.depaul.edu/dmumaugh/OOT/Design-Principles/acv.pdf)
|
||||
* [Acyclic Visitor in WikiWikiWeb](https://wiki.c2.com/?AcyclicVisitor)
|
||||
* [Acyclic Visitor](http://condor.depaul.edu/dmumaugh/OOT/Design-Principles/acv.pdf)
|
||||
115
acyclic-visitor/etc/Acyclic Visitor.ucls
Normal file
115
acyclic-visitor/etc/Acyclic Visitor.ucls
Normal file
@ -0,0 +1,115 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<class-diagram version="1.2.2" icons="true" always-add-relationships="false" generalizations="true" realizations="true"
|
||||
associations="true" dependencies="false" nesting-relationships="true" router="FAN">
|
||||
<interface id="1" language="java" name="com.iluwatar.acyclicvisitor.ModemVisitor" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ModemVisitor.java" binary="false"
|
||||
corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="860" y="67"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</interface>
|
||||
<class id="2" language="java" name="com.iluwatar.acyclicvisitor.Modem" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/Modem.java" binary="false" corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="327" y="77"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</class>
|
||||
<class id="3" language="java" name="com.iluwatar.acyclicvisitor.ConfigureForUnixVisitor" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ConfigureForUnixVisitor.java" binary="false"
|
||||
corner="BOTTOM_RIGHT">
|
||||
<position height="124" width="196" x="647" y="225"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</class>
|
||||
<class id="4" language="java" name="com.iluwatar.acyclicvisitor.Zoom" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/Zoom.java" binary="false" corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="203" y="305"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</class>
|
||||
<interface id="5" language="java" name="com.iluwatar.acyclicvisitor.HayesVisitor" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/HayesVisitor.java" binary="false"
|
||||
corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="1019" y="468"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</interface>
|
||||
<interface id="6" language="java" name="com.iluwatar.acyclicvisitor.ZoomVisitor" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ZoomVisitor.java" binary="false"
|
||||
corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="758" y="467"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</interface>
|
||||
<class id="7" language="java" name="com.iluwatar.acyclicvisitor.Hayes" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/Hayes.java" binary="false" corner="BOTTOM_RIGHT">
|
||||
<position height="-1" width="-1" x="479" y="307"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</class>
|
||||
<class id="8" language="java" name="com.iluwatar.acyclicvisitor.ConfigureForDosVisitor" project="acyclic-visitor"
|
||||
file="/acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ConfigureForDosVisitor.java" binary="false"
|
||||
corner="BOTTOM_RIGHT">
|
||||
<position height="142" width="192" x="883" y="225"/>
|
||||
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</display>
|
||||
</class>
|
||||
<generalization id="9">
|
||||
<end type="SOURCE" refId="7"/>
|
||||
<end type="TARGET" refId="2"/>
|
||||
</generalization>
|
||||
<realization id="10">
|
||||
<end type="SOURCE" refId="8"/>
|
||||
<end type="TARGET" refId="6"/>
|
||||
</realization>
|
||||
<realization id="11">
|
||||
<end type="SOURCE" refId="8"/>
|
||||
<end type="TARGET" refId="5"/>
|
||||
</realization>
|
||||
<realization id="12">
|
||||
<end type="SOURCE" refId="3"/>
|
||||
<end type="TARGET" refId="6"/>
|
||||
</realization>
|
||||
<realization id="13">
|
||||
<end type="SOURCE" refId="3"/>
|
||||
<end type="TARGET" refId="1"/>
|
||||
</realization>
|
||||
<realization id="14">
|
||||
<end type="SOURCE" refId="8"/>
|
||||
<end type="TARGET" refId="1"/>
|
||||
</realization>
|
||||
<generalization id="15">
|
||||
<end type="SOURCE" refId="4"/>
|
||||
<end type="TARGET" refId="2"/>
|
||||
</generalization>
|
||||
<classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
|
||||
sort-features="false" accessors="true" visibility="true">
|
||||
<attributes public="true" package="true" protected="true" private="true" static="true"/>
|
||||
<operations public="true" package="true" protected="true" private="true" static="true"/>
|
||||
</classifier-display>
|
||||
<association-display labels="true" multiplicity="true"/>
|
||||
</class-diagram>
|
||||
Binary file not shown.
|
Before Width: | Height: | Size: 48 KiB After Width: | Height: | Size: 26 KiB |
@ -1,53 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.acyclicvisitor {
|
||||
interface AllModemVisitor {
|
||||
}
|
||||
class App {
|
||||
+ App()
|
||||
+ main(args : String[]) {static}
|
||||
}
|
||||
class ConfigureForDosVisitor {
|
||||
- LOGGER : Logger {static}
|
||||
+ ConfigureForDosVisitor()
|
||||
+ visit(hayes : Hayes)
|
||||
+ visit(zoom : Zoom)
|
||||
}
|
||||
class ConfigureForUnixVisitor {
|
||||
- LOGGER : Logger {static}
|
||||
+ ConfigureForUnixVisitor()
|
||||
+ visit(zoom : Zoom)
|
||||
}
|
||||
class Hayes {
|
||||
- LOGGER : Logger {static}
|
||||
+ Hayes()
|
||||
+ accept(modemVisitor : ModemVisitor)
|
||||
+ toString() : String
|
||||
}
|
||||
interface HayesVisitor {
|
||||
+ visit(Hayes) {abstract}
|
||||
}
|
||||
abstract class Modem {
|
||||
+ Modem()
|
||||
+ accept(ModemVisitor) {abstract}
|
||||
}
|
||||
interface ModemVisitor {
|
||||
}
|
||||
class Zoom {
|
||||
- LOGGER : Logger {static}
|
||||
+ Zoom()
|
||||
+ accept(modemVisitor : ModemVisitor)
|
||||
+ toString() : String
|
||||
}
|
||||
interface ZoomVisitor {
|
||||
+ visit(Zoom) {abstract}
|
||||
}
|
||||
}
|
||||
AllModemVisitor --|> ZoomVisitor
|
||||
AllModemVisitor --|> HayesVisitor
|
||||
ConfigureForDosVisitor ..|> AllModemVisitor
|
||||
ConfigureForUnixVisitor ..|> ZoomVisitor
|
||||
Hayes --|> Modem
|
||||
HayesVisitor --|> ModemVisitor
|
||||
Zoom --|> Modem
|
||||
ZoomVisitor --|> ModemVisitor
|
||||
@enduml
|
||||
@ -1,29 +1,38 @@
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2014 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
|
||||
|
||||
<parent>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
|
||||
|
||||
<artifactId>acyclic-visitor</artifactId>
|
||||
|
||||
<properties>
|
||||
@ -44,40 +53,24 @@
|
||||
<dependency>
|
||||
<groupId>uk.org.lidalia</groupId>
|
||||
<artifactId>slf4j-test</artifactId>
|
||||
<version>1.2.0</version>
|
||||
<version>1.0.0</version>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.mockito</groupId>
|
||||
<artifactId>mockito-all</artifactId>
|
||||
<version>1.10.19</version>
|
||||
<version>1.9.5</version>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<!-- Maven assembly plugin is invoked with default setting which we have
|
||||
in parent pom and specifying the class having main method -->
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.acyclicvisitor.App</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,13 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* All ModemVisitor interface extends all visitor interfaces. This interface provides ease of use
|
||||
* when a visitor needs to visit all modem types.
|
||||
* All ModemVisitor interface extends all visitor interfaces. This interface
|
||||
* provides ease of use when a visitor needs to visit all modem types.
|
||||
*/
|
||||
public interface AllModemVisitor extends ZoomVisitor, HayesVisitor {
|
||||
public interface AllModemVisitor extends ZoomVisitor, HayesVisitor{
|
||||
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,33 +20,34 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* The Acyclic Visitor pattern allows new functions to be added to existing class hierarchies
|
||||
* without affecting those hierarchies, and without creating the dependency cycles that are inherent
|
||||
* to the GoF Visitor pattern, by making the Visitor base class degenerate
|
||||
*
|
||||
* <p>In this example the visitor base class is {@link ModemVisitor}. The base class of the visited
|
||||
* hierarchy is {@link Modem} and has two children {@link Hayes} and {@link Zoom} each one having
|
||||
* its own visitor interface {@link HayesVisitor} and {@link ZoomVisitor} respectively. {@link
|
||||
* ConfigureForUnixVisitor} and {@link ConfigureForDosVisitor} implement each derivative's visit
|
||||
* method only if it is required
|
||||
* The Acyclic Visitor pattern allows new functions to be added to existing class
|
||||
* hierarchies without affecting those hierarchies, and without creating the dependency
|
||||
* cycles that are inherent to the GoF Visitor pattern, by making the Visitor base class
|
||||
* degenerate
|
||||
* <p>
|
||||
* In this example the visitor base class is {@link ModemVisitor}. The base class of the
|
||||
* visited hierarchy is {@link Modem} and has two children {@link Hayes} and {@link Zoom}
|
||||
* each one having its own visitor interface {@link HayesVisitor} and {@link ZoomVisitor}
|
||||
* respectively. {@link ConfigureForUnixVisitor} and {@link ConfigureForDosVisitor}
|
||||
* implement each derivative's visit method only if it is required
|
||||
*/
|
||||
public class App {
|
||||
|
||||
|
||||
/**
|
||||
* Program's entry point.
|
||||
* Program's entry point
|
||||
*/
|
||||
public static void main(String[] args) {
|
||||
var conUnix = new ConfigureForUnixVisitor();
|
||||
var conDos = new ConfigureForDosVisitor();
|
||||
|
||||
var zoom = new Zoom();
|
||||
var hayes = new Hayes();
|
||||
|
||||
hayes.accept(conDos); // Hayes modem with Dos configurator
|
||||
|
||||
public static void main(String[] args) {
|
||||
ConfigureForUnixVisitor conUnix = new ConfigureForUnixVisitor();
|
||||
ConfigureForDosVisitor conDos = new ConfigureForDosVisitor();
|
||||
|
||||
Zoom zoom = new Zoom();
|
||||
Hayes hayes = new Hayes();
|
||||
|
||||
hayes.accept(conDos); // Hayes modem with Unix configurator
|
||||
zoom.accept(conDos); // Zoom modem with Dos configurator
|
||||
hayes.accept(conUnix); // Hayes modem with Unix configurator
|
||||
zoom.accept(conUnix); // Zoom modem with Unix configurator
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,26 +20,23 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
/**
|
||||
* ConfigureForDosVisitor class implements both zoom's and hayes' visit method for Dos
|
||||
* manufacturer.
|
||||
* ConfigureForDosVisitor class implements both zoom's and hayes' visit method
|
||||
* for Dos manufacturer
|
||||
*/
|
||||
public class ConfigureForDosVisitor implements AllModemVisitor {
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForDosVisitor.class);
|
||||
|
||||
@Override
|
||||
public void visit(Hayes hayes) {
|
||||
LOGGER.info(hayes + " used with Dos configurator.");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void visit(Zoom zoom) {
|
||||
LOGGER.info(zoom + " used with Dos configurator.");
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,21 +20,20 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
/**
|
||||
* ConfigureForUnixVisitor class implements zoom's visit method for Unix manufacturer, unlike
|
||||
* traditional visitor pattern, this class may selectively implement visit for other modems.
|
||||
* ConfigureForUnixVisitor class implements zoom's visit method for Unix
|
||||
* manufacturer, unlike traditional visitor pattern, this class may selectively implement
|
||||
* visit for other modems.
|
||||
*/
|
||||
public class ConfigureForUnixVisitor implements ZoomVisitor {
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForUnixVisitor.class);
|
||||
|
||||
@Override
|
||||
public void visit(Zoom zoom) {
|
||||
LOGGER.info(zoom + " used with Unix configurator.");
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,21 +20,20 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
/**
|
||||
* Hayes class implements its accept method.
|
||||
* Hayes class implements its accept method
|
||||
*/
|
||||
public class Hayes extends Modem {
|
||||
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForDosVisitor.class);
|
||||
|
||||
/**
|
||||
* Accepts all visitors but honors only HayesVisitor.
|
||||
* Accepts all visitors but honors only HayesVisitor
|
||||
*/
|
||||
@Override
|
||||
public void accept(ModemVisitor modemVisitor) {
|
||||
@ -45,9 +44,10 @@ public class Hayes extends Modem {
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Hayes' modem's toString method.
|
||||
* Hayes' modem's toString
|
||||
* method
|
||||
*/
|
||||
@Override
|
||||
public String toString() {
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,10 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* HayesVisitor interface.
|
||||
* HayesVisitor interface
|
||||
*/
|
||||
public interface HayesVisitor extends ModemVisitor {
|
||||
void visit(Hayes hayes);
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,10 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* Modem abstract class.
|
||||
* Modem abstract class
|
||||
*/
|
||||
public abstract class Modem {
|
||||
public abstract void accept(ModemVisitor modemVisitor);
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,12 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* ModemVisitor interface does not contain any visit methods so that it does not depend on the
|
||||
* visited hierarchy. Each derivative's visit method is declared in its own visitor interface
|
||||
* ModemVisitor interface does not contain any visit methods so that it does not
|
||||
* depend on the visited hierarchy. Each derivative's visit method is declared in
|
||||
* its own visitor interface
|
||||
*/
|
||||
public interface ModemVisitor {
|
||||
// Visitor is a degenerate base class for all visitors.
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,33 +20,33 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
/**
|
||||
* Zoom class implements its accept method.
|
||||
* Zoom class implements its accept method
|
||||
*/
|
||||
public class Zoom extends Modem {
|
||||
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForDosVisitor.class);
|
||||
|
||||
/**
|
||||
* Accepts all visitors but honors only ZoomVisitor.
|
||||
* Accepts all visitors but honors only ZoomVisitor
|
||||
*/
|
||||
@Override
|
||||
public void accept(ModemVisitor modemVisitor) {
|
||||
if (modemVisitor instanceof ZoomVisitor) {
|
||||
if (modemVisitor instanceof ZoomVisitor) {
|
||||
((ZoomVisitor) modemVisitor).visit(this);
|
||||
} else {
|
||||
LOGGER.info("Only ZoomVisitor is allowed to visit Zoom modem");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Zoom modem's toString method.
|
||||
* Zoom modem's toString
|
||||
* method
|
||||
*/
|
||||
@Override
|
||||
public String toString() {
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,10 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
/**
|
||||
* ZoomVisitor interface.
|
||||
* ZoomVisitor interface
|
||||
*/
|
||||
public interface ZoomVisitor extends ModemVisitor {
|
||||
void visit(Zoom zoom);
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,28 +20,20 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
|
||||
import com.iluwatar.acyclicvisitor.App;
|
||||
|
||||
/**
|
||||
* Tests that the Acyclic Visitor example runs without errors.
|
||||
*/
|
||||
class AppTest {
|
||||
|
||||
/**
|
||||
* Issue: Add at least one assertion to this test case.
|
||||
*
|
||||
* Solution: Inserted assertion to check whether the execution of the main method in {@link App}
|
||||
* throws an exception.
|
||||
*/
|
||||
|
||||
public class AppTest {
|
||||
|
||||
@Test
|
||||
void shouldExecuteApplicationWithoutException() {
|
||||
|
||||
assertDoesNotThrow(() -> App.main(new String[]{}));
|
||||
public void test() {
|
||||
String[] args = {};
|
||||
App.main(args);
|
||||
}
|
||||
}
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,15 +20,22 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import static org.assertj.core.api.Assertions.assertThat;
|
||||
import static org.assertj.core.groups.Tuple.tuple;
|
||||
import static org.mockito.Mockito.mock;
|
||||
import static uk.org.lidalia.slf4jext.Level.INFO;
|
||||
|
||||
import org.junit.jupiter.api.AfterEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForDosVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Hayes;
|
||||
import com.iluwatar.acyclicvisitor.HayesVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Zoom;
|
||||
import com.iluwatar.acyclicvisitor.ZoomVisitor;
|
||||
|
||||
import uk.org.lidalia.slf4jtest.TestLogger;
|
||||
import uk.org.lidalia.slf4jtest.TestLoggerFactory;
|
||||
|
||||
@ -37,30 +44,28 @@ import uk.org.lidalia.slf4jtest.TestLoggerFactory;
|
||||
*/
|
||||
public class ConfigureForDosVisitorTest {
|
||||
|
||||
private final TestLogger logger = TestLoggerFactory.getTestLogger(ConfigureForDosVisitor.class);
|
||||
TestLogger logger = TestLoggerFactory.getTestLogger(ConfigureForDosVisitor.class);
|
||||
|
||||
@Test
|
||||
public void testVisitForZoom() {
|
||||
var conDos = new ConfigureForDosVisitor();
|
||||
var zoom = new Zoom();
|
||||
ConfigureForDosVisitor conDos = new ConfigureForDosVisitor();
|
||||
Zoom zoom = new Zoom();
|
||||
|
||||
conDos.visit(zoom);
|
||||
|
||||
assertThat(logger.getLoggingEvents())
|
||||
.extracting("level", "message")
|
||||
.contains(tuple(INFO, zoom + " used with Dos configurator."));
|
||||
assertThat(logger.getLoggingEvents()).extracting("level", "message").contains(
|
||||
tuple(INFO, zoom + " used with Dos configurator."));
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testVisitForHayes() {
|
||||
var conDos = new ConfigureForDosVisitor();
|
||||
var hayes = new Hayes();
|
||||
ConfigureForDosVisitor conDos = new ConfigureForDosVisitor();
|
||||
Hayes hayes = new Hayes();
|
||||
|
||||
conDos.visit(hayes);
|
||||
|
||||
assertThat(logger.getLoggingEvents())
|
||||
.extracting("level", "message")
|
||||
.contains(tuple(INFO, hayes + " used with Dos configurator."));
|
||||
assertThat(logger.getLoggingEvents()).extracting("level", "message").contains(
|
||||
tuple(INFO, hayes + " used with Dos configurator."));
|
||||
}
|
||||
|
||||
@AfterEach
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,25 +20,32 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import static org.assertj.core.api.Assertions.assertThat;
|
||||
import static org.assertj.core.groups.Tuple.tuple;
|
||||
import static uk.org.lidalia.slf4jext.Level.INFO;
|
||||
|
||||
import org.junit.jupiter.api.AfterEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import static org.mockito.Mockito.mock;
|
||||
|
||||
import uk.org.lidalia.slf4jtest.TestLogger;
|
||||
import uk.org.lidalia.slf4jtest.TestLoggerFactory;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForUnixVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Hayes;
|
||||
import com.iluwatar.acyclicvisitor.HayesVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Zoom;
|
||||
import com.iluwatar.acyclicvisitor.ZoomVisitor;
|
||||
|
||||
import org.junit.jupiter.api.AfterEach;
|
||||
import org.junit.jupiter.api.Assertions;
|
||||
|
||||
/**
|
||||
* ConfigureForUnixVisitor test class
|
||||
*/
|
||||
public class ConfigureForUnixVisitorTest {
|
||||
|
||||
private static final TestLogger LOGGER = TestLoggerFactory.getTestLogger(ConfigureForUnixVisitor.class);
|
||||
TestLogger logger = TestLoggerFactory.getTestLogger(ConfigureForUnixVisitor.class);
|
||||
|
||||
@AfterEach
|
||||
public void clearLoggers() {
|
||||
@ -47,13 +54,12 @@ public class ConfigureForUnixVisitorTest {
|
||||
|
||||
@Test
|
||||
public void testVisitForZoom() {
|
||||
var conUnix = new ConfigureForUnixVisitor();
|
||||
var zoom = new Zoom();
|
||||
ConfigureForUnixVisitor conUnix = new ConfigureForUnixVisitor();
|
||||
Zoom zoom = new Zoom();
|
||||
|
||||
conUnix.visit(zoom);
|
||||
|
||||
assertThat(LOGGER.getLoggingEvents())
|
||||
.extracting("level", "message")
|
||||
.contains(tuple(INFO, zoom + " used with Unix configurator."));
|
||||
assertThat(logger.getLoggingEvents()).extracting("level", "message").contains(
|
||||
tuple(INFO, zoom + " used with Unix configurator."));
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
import static org.mockito.Matchers.eq;
|
||||
@ -30,6 +29,11 @@ import static org.mockito.Mockito.verifyZeroInteractions;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForDosVisitor;
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForUnixVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Hayes;
|
||||
import com.iluwatar.acyclicvisitor.HayesVisitor;
|
||||
|
||||
/**
|
||||
* Hayes test class
|
||||
*/
|
||||
@ -37,8 +41,8 @@ public class HayesTest {
|
||||
|
||||
@Test
|
||||
public void testAcceptForDos() {
|
||||
var hayes = new Hayes();
|
||||
var mockVisitor = mock(ConfigureForDosVisitor.class);
|
||||
Hayes hayes = new Hayes();
|
||||
ConfigureForDosVisitor mockVisitor = mock(ConfigureForDosVisitor.class);
|
||||
|
||||
hayes.accept(mockVisitor);
|
||||
verify((HayesVisitor)mockVisitor).visit(eq(hayes));
|
||||
@ -46,8 +50,8 @@ public class HayesTest {
|
||||
|
||||
@Test
|
||||
public void testAcceptForUnix() {
|
||||
var hayes = new Hayes();
|
||||
var mockVisitor = mock(ConfigureForUnixVisitor.class);
|
||||
Hayes hayes = new Hayes();
|
||||
ConfigureForUnixVisitor mockVisitor = mock(ConfigureForUnixVisitor.class);
|
||||
|
||||
hayes.accept(mockVisitor);
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.acyclicvisitor;
|
||||
|
||||
|
||||
@ -30,6 +29,11 @@ import static org.mockito.Mockito.mock;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForDosVisitor;
|
||||
import com.iluwatar.acyclicvisitor.ConfigureForUnixVisitor;
|
||||
import com.iluwatar.acyclicvisitor.Zoom;
|
||||
import com.iluwatar.acyclicvisitor.ZoomVisitor;
|
||||
|
||||
/**
|
||||
* Zoom test class
|
||||
*/
|
||||
@ -37,8 +41,8 @@ public class ZoomTest {
|
||||
|
||||
@Test
|
||||
public void testAcceptForDos() {
|
||||
var zoom = new Zoom();
|
||||
var mockVisitor = mock(ConfigureForDosVisitor.class);
|
||||
Zoom zoom = new Zoom();
|
||||
ConfigureForDosVisitor mockVisitor = mock(ConfigureForDosVisitor.class);
|
||||
|
||||
zoom.accept(mockVisitor);
|
||||
verify((ZoomVisitor)mockVisitor).visit(eq(zoom));
|
||||
@ -46,8 +50,8 @@ public class ZoomTest {
|
||||
|
||||
@Test
|
||||
public void testAcceptForUnix() {
|
||||
var zoom = new Zoom();
|
||||
var mockVisitor = mock(ConfigureForUnixVisitor.class);
|
||||
Zoom zoom = new Zoom();
|
||||
ConfigureForUnixVisitor mockVisitor = mock(ConfigureForUnixVisitor.class);
|
||||
|
||||
zoom.accept(mockVisitor);
|
||||
verify((ZoomVisitor)mockVisitor).visit(eq(zoom));
|
||||
|
||||
@ -5,15 +5,18 @@ folder: adapter
|
||||
permalink: /patterns/adapter/
|
||||
categories: Structural
|
||||
tags:
|
||||
- Gang of Four
|
||||
- Java
|
||||
- Gang Of Four
|
||||
- Difficulty-Beginner
|
||||
---
|
||||
|
||||
## Also known as
|
||||
Wrapper
|
||||
|
||||
## Intent
|
||||
Convert the interface of a class into another interface the clients expect. Adapter lets classes work together that
|
||||
couldn't otherwise because of incompatible interfaces.
|
||||
Convert the interface of a class into another interface the clients
|
||||
expect. Adapter lets classes work together that couldn't otherwise because of
|
||||
incompatible interfaces.
|
||||
|
||||
## Explanation
|
||||
|
||||
@ -53,14 +56,15 @@ public class FishingBoat {
|
||||
And captain expects an implementation of `RowingBoat` interface to be able to move
|
||||
|
||||
```java
|
||||
public class Captain {
|
||||
public class Captain implements RowingBoat {
|
||||
|
||||
private RowingBoat rowingBoat;
|
||||
|
||||
private final RowingBoat rowingBoat;
|
||||
// default constructor and setter for rowingBoat
|
||||
public Captain(RowingBoat rowingBoat) {
|
||||
this.rowingBoat = rowingBoat;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void row() {
|
||||
rowingBoat.row();
|
||||
}
|
||||
@ -74,7 +78,7 @@ public class FishingBoatAdapter implements RowingBoat {
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoatAdapter.class);
|
||||
|
||||
private final FishingBoat boat;
|
||||
private FishingBoat boat;
|
||||
|
||||
public FishingBoatAdapter() {
|
||||
boat = new FishingBoat();
|
||||
@ -90,13 +94,10 @@ public class FishingBoatAdapter implements RowingBoat {
|
||||
And now the `Captain` can use the `FishingBoat` to escape the pirates.
|
||||
|
||||
```java
|
||||
var captain = new Captain(new FishingBoatAdapter());
|
||||
Captain captain = new Captain(new FishingBoatAdapter());
|
||||
captain.row();
|
||||
```
|
||||
|
||||
## Class diagram
|
||||
|
||||
|
||||
## Applicability
|
||||
Use the Adapter pattern when
|
||||
|
||||
@ -128,7 +129,5 @@ An object adapter
|
||||
|
||||
## Credits
|
||||
|
||||
* [Design Patterns: Elements of Reusable Object-Oriented Software](https://www.amazon.com/gp/product/0201633612/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0201633612&linkCode=as2&tag=javadesignpat-20&linkId=675d49790ce11db99d90bde47f1aeb59)
|
||||
* [J2EE Design Patterns](https://www.amazon.com/gp/product/0596004273/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596004273&linkCode=as2&tag=javadesignpat-20&linkId=48d37c67fb3d845b802fa9b619ad8f31)
|
||||
* [Head First Design Patterns: A Brain-Friendly Guide](https://www.amazon.com/gp/product/0596007124/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596007124&linkCode=as2&tag=javadesignpat-20&linkId=6b8b6eea86021af6c8e3cd3fc382cb5b)
|
||||
* [Refactoring to Patterns](https://www.amazon.com/gp/product/0321213351/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0321213351&linkCode=as2&tag=javadesignpat-20&linkId=2a76fcb387234bc71b1c61150b3cc3a7)
|
||||
* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
|
||||
* [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2)
|
||||
|
||||
Binary file not shown.
|
Before Width: | Height: | Size: 25 KiB |
@ -1,31 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.adapter {
|
||||
class App {
|
||||
- App()
|
||||
+ main(args : String[]) {static}
|
||||
}
|
||||
class Captain {
|
||||
- rowingBoat : RowingBoat
|
||||
+ Captain()
|
||||
+ Captain(boat : RowingBoat)
|
||||
~ row()
|
||||
~ setRowingBoat(boat : RowingBoat)
|
||||
}
|
||||
~class FishingBoat {
|
||||
- LOGGER : Logger {static}
|
||||
~ FishingBoat()
|
||||
~ sail()
|
||||
}
|
||||
class FishingBoatAdapter {
|
||||
- boat : FishingBoat
|
||||
+ FishingBoatAdapter()
|
||||
+ row()
|
||||
}
|
||||
interface RowingBoat {
|
||||
+ row() {abstract}
|
||||
}
|
||||
}
|
||||
FishingBoatAdapter --> "-boat" FishingBoat
|
||||
Captain --> "-rowingBoat" RowingBoat
|
||||
FishingBoatAdapter ..|> RowingBoat
|
||||
@enduml
|
||||
109
adapter/pom.xml
109
adapter/pom.xml
@ -1,61 +1,52 @@
|
||||
<?xml version="1.0"?>
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<project
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
|
||||
xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>adapter</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.mockito</groupId>
|
||||
<artifactId>mockito-core</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<!-- Maven assembly plugin is invoked with default setting which we have
|
||||
in parent pom and specifying the class having main method -->
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.adapter.App</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<parent>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<artifactId>java-design-patterns</artifactId>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<artifactId>adapter</artifactId>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.mockito</groupId>
|
||||
<artifactId>mockito-core</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</project>
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
/**
|
||||
@ -29,33 +28,33 @@ package com.iluwatar.adapter;
|
||||
* The Adapter design pattern allows otherwise incompatible classes to work together by converting
|
||||
* the interface of one class into an interface expected by the clients.
|
||||
*
|
||||
* <p>There are two variations of the Adapter pattern: The class adapter implements the adaptee's
|
||||
* <p>
|
||||
* There are two variations of the Adapter pattern: The class adapter implements the adaptee's
|
||||
* interface whereas the object adapter uses composition to contain the adaptee in the adapter
|
||||
* object. This example uses the object adapter approach.
|
||||
*
|
||||
* <p>The Adapter ({@link FishingBoatAdapter}) converts the interface of the adaptee class ({@link
|
||||
* FishingBoat}) into a suitable one expected by the client ({@link RowingBoat}).
|
||||
* <p>
|
||||
* The Adapter ({@link FishingBoatAdapter}) converts the interface of the adaptee class (
|
||||
* {@link FishingBoat}) into a suitable one expected by the client ( {@link RowingBoat} ).
|
||||
*
|
||||
* <p>
|
||||
* The story of this implementation is this. <br>
|
||||
* Pirates are coming! we need a {@link RowingBoat} to flee! We have a {@link FishingBoat} and our
|
||||
* captain. We have no time to make up a new ship! we need to reuse this {@link FishingBoat}. The
|
||||
* captain needs a rowing boat which he can operate. The spec is in {@link RowingBoat}. We will
|
||||
* use the Adapter pattern to reuse {@link FishingBoat}.
|
||||
*
|
||||
* <p>The story of this implementation is this. <br> Pirates are coming! we need a {@link
|
||||
* RowingBoat} to flee! We have a {@link FishingBoat} and our captain. We have no time to make up a
|
||||
* new ship! we need to reuse this {@link FishingBoat}. The captain needs a rowing boat which he can
|
||||
* operate. The spec is in {@link RowingBoat}. We will use the Adapter pattern to reuse {@link
|
||||
* FishingBoat}.
|
||||
*/
|
||||
public final class App {
|
||||
|
||||
private App() {
|
||||
}
|
||||
public class App {
|
||||
|
||||
/**
|
||||
* Program entry point.
|
||||
*
|
||||
* @param args command line args
|
||||
*/
|
||||
public static void main(final String[] args) {
|
||||
// The captain can only operate rowing boats but with adapter he is able to
|
||||
// use fishing boats as well
|
||||
var captain = new Captain(new FishingBoatAdapter());
|
||||
public static void main(String[] args) {
|
||||
// The captain can only operate rowing boats but with adapter he is able to use fishing boats as well
|
||||
Captain captain = new Captain(new FishingBoatAdapter());
|
||||
captain.row();
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,28 +20,27 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
/**
|
||||
* The Captain uses {@link RowingBoat} to sail. <br> This is the client in the pattern.
|
||||
* The Captain uses {@link RowingBoat} to sail. <br>
|
||||
* This is the client in the pattern.
|
||||
*/
|
||||
public final class Captain {
|
||||
public class Captain {
|
||||
|
||||
private RowingBoat rowingBoat;
|
||||
|
||||
public Captain() {
|
||||
public Captain() {}
|
||||
|
||||
public Captain(RowingBoat rowingBoat) {
|
||||
this.rowingBoat = rowingBoat;
|
||||
}
|
||||
|
||||
public Captain(final RowingBoat boat) {
|
||||
this.rowingBoat = boat;
|
||||
public void setRowingBoat(RowingBoat rowingBoat) {
|
||||
this.rowingBoat = rowingBoat;
|
||||
}
|
||||
|
||||
void setRowingBoat(final RowingBoat boat) {
|
||||
this.rowingBoat = boat;
|
||||
}
|
||||
|
||||
void row() {
|
||||
public void row() {
|
||||
rowingBoat.row();
|
||||
}
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,22 +20,22 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
import static org.slf4j.LoggerFactory.getLogger;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
/**
|
||||
* Device class (adaptee in the pattern). We want to reuse this class. Fishing boat moves by
|
||||
* sailing.
|
||||
*
|
||||
* Device class (adaptee in the pattern). We want to reuse this class.
|
||||
* Fishing boat moves by sailing.
|
||||
*
|
||||
*/
|
||||
final class FishingBoat {
|
||||
public class FishingBoat {
|
||||
|
||||
private static final Logger LOGGER = getLogger(FishingBoat.class);
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoat.class);
|
||||
|
||||
void sail() {
|
||||
public void sail() {
|
||||
LOGGER.info("The fishing boat is sailing");
|
||||
}
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,22 +20,24 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
/**
|
||||
*
|
||||
* Adapter class. Adapts the interface of the device ({@link FishingBoat}) into {@link RowingBoat}
|
||||
* interface expected by the client ({@link Captain}).
|
||||
*
|
||||
*/
|
||||
public class FishingBoatAdapter implements RowingBoat {
|
||||
|
||||
private final FishingBoat boat;
|
||||
private FishingBoat boat;
|
||||
|
||||
public FishingBoatAdapter() {
|
||||
boat = new FishingBoat();
|
||||
}
|
||||
|
||||
public final void row() {
|
||||
@Override
|
||||
public void row() {
|
||||
boat.sail();
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,11 +20,12 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
/**
|
||||
* The interface expected by the client.<br> A rowing boat is rowed to move.
|
||||
* The interface expected by the client.<br>
|
||||
* A rowing boat is rowed to move.
|
||||
*
|
||||
*/
|
||||
public interface RowingBoat {
|
||||
|
||||
|
||||
@ -1,24 +0,0 @@
|
||||
/*
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,19 +20,20 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import java.util.HashMap;
|
||||
import java.util.Map;
|
||||
|
||||
import static org.mockito.Mockito.spy;
|
||||
import static org.mockito.Mockito.verify;
|
||||
|
||||
import java.util.HashMap;
|
||||
import java.util.Map;
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
/**
|
||||
* Test class
|
||||
*
|
||||
*/
|
||||
public class AdapterPatternTest {
|
||||
|
||||
@ -49,29 +50,29 @@ public class AdapterPatternTest {
|
||||
public void setup() {
|
||||
beans = new HashMap<>();
|
||||
|
||||
var fishingBoatAdapter = spy(new FishingBoatAdapter());
|
||||
FishingBoatAdapter fishingBoatAdapter = spy(new FishingBoatAdapter());
|
||||
beans.put(FISHING_BEAN, fishingBoatAdapter);
|
||||
|
||||
var captain = new Captain();
|
||||
Captain captain = new Captain();
|
||||
captain.setRowingBoat((FishingBoatAdapter) beans.get(FISHING_BEAN));
|
||||
beans.put(ROWING_BEAN, captain);
|
||||
}
|
||||
|
||||
/**
|
||||
* This test asserts that when we use the row() method on a captain bean(client), it is internally
|
||||
* calling sail method on the fishing boat object. The Adapter ({@link FishingBoatAdapter} )
|
||||
* converts the interface of the target class ( {@link FishingBoat}) into a suitable one expected
|
||||
* by the client ({@link Captain} ).
|
||||
* This test asserts that when we use the row() method on a captain bean(client), it is
|
||||
* internally calling sail method on the fishing boat object. The Adapter ({@link FishingBoatAdapter}
|
||||
* ) converts the interface of the target class ( {@link FishingBoat}) into a suitable one
|
||||
* expected by the client ({@link Captain} ).
|
||||
*/
|
||||
@Test
|
||||
public void testAdapter() {
|
||||
var captain = (Captain) beans.get(ROWING_BEAN);
|
||||
Captain captain = (Captain) beans.get(ROWING_BEAN);
|
||||
|
||||
// when captain moves
|
||||
captain.row();
|
||||
|
||||
// the captain internally calls the battleship object to move
|
||||
var adapter = (RowingBoat) beans.get(FISHING_BEAN);
|
||||
RowingBoat adapter = (RowingBoat) beans.get(FISHING_BEAN);
|
||||
verify(adapter).row();
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,28 +20,19 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.adapter;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
|
||||
import java.io.IOException;
|
||||
|
||||
/**
|
||||
* Tests that Adapter example runs without errors.
|
||||
*/
|
||||
class AppTest {
|
||||
|
||||
/**
|
||||
* Issue: Add at least one assertion to this test case.
|
||||
*
|
||||
* Solution: Inserted assertion to check whether the execution of the main method in {@link App}
|
||||
* throws an exception.
|
||||
*/
|
||||
|
||||
public class AppTest {
|
||||
@Test
|
||||
void shouldExecuteApplicationWithoutException() {
|
||||
|
||||
assertDoesNotThrow(() -> App.main(new String[]{}));
|
||||
public void test() throws IOException {
|
||||
String[] args = {};
|
||||
App.main(args);
|
||||
}
|
||||
}
|
||||
|
||||
@ -5,98 +5,20 @@ folder: aggregator-microservices
|
||||
permalink: /patterns/aggregator-microservices/
|
||||
categories: Architectural
|
||||
tags:
|
||||
- Cloud distributed
|
||||
- Decoupling
|
||||
- Microservices
|
||||
- Java
|
||||
- Spring
|
||||
---
|
||||
|
||||
## Intent
|
||||
|
||||
The user makes a single call to the aggregator service, and the aggregator then calls each relevant microservice.
|
||||
The user makes a single call to the Aggregator, and the aggregator then calls each relevant microservice and collects
|
||||
the data, apply business logic to it, and further publish is as a REST Endpoint.
|
||||
More variations of the aggregator are:
|
||||
- Proxy Microservice Design Pattern: A different microservice is called upon the business need.
|
||||
- Chained Microservice Design Pattern: In this case each microservice is dependent/ chained to a series
|
||||
of other microservices.
|
||||
|
||||
## Explanation
|
||||
|
||||
Real world example
|
||||
|
||||
> Our web marketplace needs information about products and their current inventory. It makes a call to an aggregator
|
||||
> service which in turn calls the product information microservice and product inventory microservice returning the
|
||||
> combined information.
|
||||
|
||||
In plain words
|
||||
|
||||
> Aggregator Microservice collects pieces of data from various microservices and returns an aggregate for processing.
|
||||
|
||||
Stack Overflow says
|
||||
|
||||
> Aggregator Microservice invokes multiple services to achieve the functionality required by the application.
|
||||
|
||||
**Programmatic Example**
|
||||
|
||||
Let's start from the data model. Here's our `Product`.
|
||||
|
||||
```java
|
||||
public class Product {
|
||||
private String title;
|
||||
private int productInventories;
|
||||
// getters and setters ->
|
||||
...
|
||||
}
|
||||
```
|
||||
|
||||
Next we can introduce our `Aggregator` microservice. It contains clients `ProductInformationClient` and
|
||||
`ProductInventoryClient` for calling respective microservices.
|
||||
|
||||
```java
|
||||
@RestController
|
||||
public class Aggregator {
|
||||
|
||||
@Resource
|
||||
private ProductInformationClient informationClient;
|
||||
|
||||
@Resource
|
||||
private ProductInventoryClient inventoryClient;
|
||||
|
||||
@RequestMapping(path = "/product", method = RequestMethod.GET)
|
||||
public Product getProduct() {
|
||||
|
||||
var product = new Product();
|
||||
var productTitle = informationClient.getProductTitle();
|
||||
var productInventory = inventoryClient.getProductInventories();
|
||||
|
||||
//Fallback to error message
|
||||
product.setTitle(requireNonNullElse(productTitle, "Error: Fetching Product Title Failed"));
|
||||
|
||||
//Fallback to default error inventory
|
||||
product.setProductInventories(requireNonNullElse(productInventory, -1));
|
||||
|
||||
return product;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Here's the essence of information microservice implementation. Inventory microservice is similar, it just returns
|
||||
inventory counts.
|
||||
|
||||
```java
|
||||
@RestController
|
||||
public class InformationController {
|
||||
@RequestMapping(value = "/information", method = RequestMethod.GET)
|
||||
public String getProductTitle() {
|
||||
return "The Product Title.";
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Now calling our `Aggregator` REST API returns the product information.
|
||||
|
||||
```bash
|
||||
curl http://localhost:50004/product
|
||||
{"title":"The Product Title.","productInventories":5}
|
||||
```
|
||||
|
||||
## Class diagram
|
||||
|
||||
|
||||
|
||||
|
||||
## Applicability
|
||||
|
||||
@ -104,6 +26,4 @@ Use the Aggregator Microservices pattern when you need a unified API for various
|
||||
|
||||
## Credits
|
||||
|
||||
* [Microservice Design Patterns](http://web.archive.org/web/20190705163602/http://blog.arungupta.me/microservice-design-patterns/)
|
||||
* [Microservices Patterns: With examples in Java](https://www.amazon.com/gp/product/1617294543/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=javadesignpat-20&creative=9325&linkCode=as2&creativeASIN=1617294543&linkId=8b4e570267bc5fb8b8189917b461dc60)
|
||||
* [Architectural Patterns: Uncover essential patterns in the most indispensable realm of enterprise architecture](https://www.amazon.com/gp/product/B077T7V8RC/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=javadesignpat-20&creative=9325&linkCode=as2&creativeASIN=B077T7V8RC&linkId=c34d204bfe1b277914b420189f09c1a4)
|
||||
* [Microservice Design Patterns](http://blog.arungupta.me/microservice-design-patterns/)
|
||||
|
||||
Binary file not shown.
|
Before Width: | Height: | Size: 40 KiB |
@ -1,43 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.aggregator.microservices {
|
||||
class Aggregator {
|
||||
- informationClient : ProductInformationClient
|
||||
- inventoryClient : ProductInventoryClient
|
||||
+ Aggregator()
|
||||
+ getProduct() : Product
|
||||
}
|
||||
class App {
|
||||
+ App()
|
||||
+ main(args : String[]) {static}
|
||||
}
|
||||
class Product {
|
||||
- productInventories : int
|
||||
- title : String
|
||||
+ Product()
|
||||
+ getProductInventories() : int
|
||||
+ getTitle() : String
|
||||
+ setProductInventories(productInventories : int)
|
||||
+ setTitle(title : String)
|
||||
}
|
||||
interface ProductInformationClient {
|
||||
+ getProductTitle() : String {abstract}
|
||||
}
|
||||
class ProductInformationClientImpl {
|
||||
- LOGGER : Logger {static}
|
||||
+ ProductInformationClientImpl()
|
||||
+ getProductTitle() : String
|
||||
}
|
||||
interface ProductInventoryClient {
|
||||
+ getProductInventories() : Integer {abstract}
|
||||
}
|
||||
class ProductInventoryClientImpl {
|
||||
- LOGGER : Logger {static}
|
||||
+ ProductInventoryClientImpl()
|
||||
+ getProductInventories() : Integer
|
||||
}
|
||||
}
|
||||
Aggregator --> "-informationClient" ProductInformationClient
|
||||
Aggregator --> "-inventoryClient" ProductInventoryClient
|
||||
ProductInformationClientImpl ..|> ProductInformationClient
|
||||
ProductInventoryClientImpl ..|> ProductInventoryClient
|
||||
@enduml
|
||||
@ -1,81 +1,93 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<parent>
|
||||
<artifactId>aggregator-microservices</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<artifactId>aggregator-service</artifactId>
|
||||
<packaging>jar</packaging>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework</groupId>
|
||||
<artifactId>spring-webmvc</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-web</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.mockito</groupId>
|
||||
<artifactId>mockito-core</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<!--
|
||||
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>repackage</goal>
|
||||
</goals>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<!-- Maven assembly plugin is invoked with default setting which we have
|
||||
in parent pom and specifying the class having main method -->
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.aggregator.microservices.App</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
The MIT License
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<parent>
|
||||
<artifactId>aggregator-microservices</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
|
||||
<artifactId>aggregator-service</artifactId>
|
||||
<packaging>jar</packaging>
|
||||
|
||||
<dependencyManagement>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-dependencies</artifactId>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</dependencyManagement>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework</groupId>
|
||||
<artifactId>spring-webmvc</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-web</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.mockito</groupId>
|
||||
<artifactId>mockito-core</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.apache.httpcomponents</groupId>
|
||||
<artifactId>httpclient</artifactId>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
<version>${spring-boot.version}</version>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>repackage</goal>
|
||||
</goals>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,19 +20,16 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
import static java.util.Objects.requireNonNullElse;
|
||||
|
||||
import javax.annotation.Resource;
|
||||
import org.springframework.web.bind.annotation.RequestMapping;
|
||||
import org.springframework.web.bind.annotation.RequestMethod;
|
||||
import org.springframework.web.bind.annotation.RestController;
|
||||
|
||||
import javax.annotation.Resource;
|
||||
|
||||
/**
|
||||
* The aggregator aggregates calls on various micro-services, collects data and further publishes
|
||||
* them under a REST endpoint.
|
||||
* The aggregator aggregates calls on various micro-services, collects
|
||||
* data and further publishes them under a REST endpoint.
|
||||
*/
|
||||
@RestController
|
||||
public class Aggregator {
|
||||
@ -50,19 +47,11 @@ public class Aggregator {
|
||||
*
|
||||
* @return a Product.
|
||||
*/
|
||||
@RequestMapping(path = "/product", method = RequestMethod.GET)
|
||||
@RequestMapping("/product")
|
||||
public Product getProduct() {
|
||||
|
||||
var product = new Product();
|
||||
var productTitle = informationClient.getProductTitle();
|
||||
var productInventory = inventoryClient.getProductInventories();
|
||||
|
||||
//Fallback to error message
|
||||
product.setTitle(requireNonNullElse(productTitle, "Error: Fetching Product Title Failed"));
|
||||
|
||||
//Fallback to default error inventory
|
||||
product.setProductInventories(requireNonNullElse(productInventory, -1));
|
||||
|
||||
Product product = new Product();
|
||||
product.setTitle(informationClient.getProductTitle());
|
||||
product.setProductInventories(inventoryClient.getProductInventories());
|
||||
return product;
|
||||
}
|
||||
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,20 +20,19 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
import org.springframework.boot.SpringApplication;
|
||||
import org.springframework.boot.autoconfigure.SpringBootApplication;
|
||||
|
||||
/**
|
||||
* Spring Boot EntryPoint Class.
|
||||
* Spring Boot EntryPoint Class
|
||||
*/
|
||||
@SpringBootApplication
|
||||
public class App {
|
||||
|
||||
/**
|
||||
* Program entry point.
|
||||
* Program entry point
|
||||
*
|
||||
* @param args command line args
|
||||
*/
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
/**
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
/**
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,18 +20,19 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.net.URI;
|
||||
import java.net.http.HttpClient;
|
||||
import java.net.http.HttpRequest;
|
||||
import java.net.http.HttpResponse;
|
||||
import org.apache.http.client.methods.CloseableHttpResponse;
|
||||
import org.apache.http.client.methods.HttpGet;
|
||||
import org.apache.http.impl.client.CloseableHttpClient;
|
||||
import org.apache.http.impl.client.HttpClients;
|
||||
import org.apache.http.util.EntityUtils;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
import org.springframework.stereotype.Component;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
/**
|
||||
* An adapter to communicate with information micro-service.
|
||||
*/
|
||||
@ -42,19 +43,15 @@ public class ProductInformationClientImpl implements ProductInformationClient {
|
||||
|
||||
@Override
|
||||
public String getProductTitle() {
|
||||
var request = HttpRequest.newBuilder()
|
||||
.GET()
|
||||
.uri(URI.create("http://localhost:51515/information"))
|
||||
.build();
|
||||
var client = HttpClient.newHttpClient();
|
||||
try {
|
||||
var httpResponse = client.send(request, HttpResponse.BodyHandlers.ofString());
|
||||
return httpResponse.body();
|
||||
} catch (IOException ioe) {
|
||||
LOGGER.error("IOException Occurred", ioe);
|
||||
} catch (InterruptedException ie) {
|
||||
LOGGER.error("InterruptedException Occurred", ie);
|
||||
String response = null;
|
||||
try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
|
||||
HttpGet httpGet = new HttpGet("http://localhost:51515/information");
|
||||
try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) {
|
||||
response = EntityUtils.toString(httpResponse.getEntity());
|
||||
}
|
||||
} catch (IOException e) {
|
||||
LOGGER.error("Exception caught.", e);
|
||||
}
|
||||
return null;
|
||||
return response;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
/**
|
||||
@ -28,5 +27,5 @@ package com.iluwatar.aggregator.microservices;
|
||||
*/
|
||||
public interface ProductInventoryClient {
|
||||
|
||||
Integer getProductInventories();
|
||||
int getProductInventories();
|
||||
}
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,18 +20,19 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.net.URI;
|
||||
import java.net.http.HttpClient;
|
||||
import java.net.http.HttpRequest;
|
||||
import java.net.http.HttpResponse;
|
||||
import org.apache.http.client.methods.CloseableHttpResponse;
|
||||
import org.apache.http.client.methods.HttpGet;
|
||||
import org.apache.http.impl.client.CloseableHttpClient;
|
||||
import org.apache.http.impl.client.HttpClients;
|
||||
import org.apache.http.util.EntityUtils;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
import org.springframework.stereotype.Component;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
/**
|
||||
* An adapter to communicate with inventory micro-service.
|
||||
*/
|
||||
@ -41,26 +42,16 @@ public class ProductInventoryClientImpl implements ProductInventoryClient {
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(ProductInventoryClientImpl.class);
|
||||
|
||||
@Override
|
||||
public Integer getProductInventories() {
|
||||
var response = "";
|
||||
|
||||
var request = HttpRequest.newBuilder()
|
||||
.GET()
|
||||
.uri(URI.create("http://localhost:51516/inventories"))
|
||||
.build();
|
||||
var client = HttpClient.newHttpClient();
|
||||
try {
|
||||
var httpResponse = client.send(request, HttpResponse.BodyHandlers.ofString());
|
||||
response = httpResponse.body();
|
||||
} catch (IOException ioe) {
|
||||
LOGGER.error("IOException Occurred", ioe);
|
||||
} catch (InterruptedException ie) {
|
||||
LOGGER.error("InterruptedException Occurred", ie);
|
||||
}
|
||||
if ("".equalsIgnoreCase(response)) {
|
||||
return null;
|
||||
} else {
|
||||
return Integer.parseInt(response);
|
||||
public int getProductInventories() {
|
||||
String response = "0";
|
||||
try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
|
||||
HttpGet httpGet = new HttpGet("http://localhost:51516/inventories");
|
||||
try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) {
|
||||
response = EntityUtils.toString(httpResponse.getEntity());
|
||||
}
|
||||
} catch (IOException e) {
|
||||
LOGGER.error("Exception caught.", e);
|
||||
}
|
||||
return Integer.parseInt(response);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
#
|
||||
# The MIT License
|
||||
# Copyright © 2014-2019 Ilkka Seppälä
|
||||
# Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
#
|
||||
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
# of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,4 +20,5 @@
|
||||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
# THE SOFTWARE.
|
||||
#
|
||||
|
||||
server.port=50004
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,18 +20,17 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.aggregator.microservices;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.mockito.Mockito.when;
|
||||
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import org.mockito.InjectMocks;
|
||||
import org.mockito.Mock;
|
||||
import org.mockito.MockitoAnnotations;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.mockito.Mockito.when;
|
||||
|
||||
/**
|
||||
* Test Aggregation of domain objects
|
||||
*/
|
||||
@ -56,13 +55,13 @@ public class AggregatorTest {
|
||||
*/
|
||||
@Test
|
||||
public void testGetProduct() {
|
||||
var title = "The Product Title.";
|
||||
var inventories = 5;
|
||||
String title = "The Product Title.";
|
||||
int inventories = 5;
|
||||
|
||||
when(informationClient.getProductTitle()).thenReturn(title);
|
||||
when(inventoryClient.getProductInventories()).thenReturn(inventories);
|
||||
|
||||
var testProduct = aggregator.getProduct();
|
||||
Product testProduct = aggregator.getProduct();
|
||||
|
||||
assertEquals(title, testProduct.getTitle());
|
||||
assertEquals(inventories, testProduct.getProductInventories());
|
||||
|
||||
BIN
aggregator-microservices/etc/aggregator-microservice.png
Normal file
BIN
aggregator-microservices/etc/aggregator-microservice.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 40 KiB |
@ -1,2 +0,0 @@
|
||||
@startuml
|
||||
@enduml
|
||||
@ -1,12 +0,0 @@
|
||||
@startuml
|
||||
package com.iluwatar.information.microservice {
|
||||
class InformationApplication {
|
||||
+ InformationApplication()
|
||||
+ main(args : String[]) {static}
|
||||
}
|
||||
class InformationController {
|
||||
+ InformationController()
|
||||
+ getProductTitle() : String
|
||||
}
|
||||
}
|
||||
@enduml
|
||||
@ -1,76 +1,84 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby
|
||||
granted, free of charge, to any person obtaining a copy of this software
|
||||
and associated documentation files (the "Software"), to deal in the Software
|
||||
without restriction, including without limitation the rights to use, copy,
|
||||
modify, merge, publish, distribute, sublicense, and/or sell copies of the
|
||||
Software, and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions: The above copyright notice and this
|
||||
permission notice shall be included in all copies or substantial portions
|
||||
of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
||||
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE. -->
|
||||
<!--
|
||||
|
||||
The MIT License
|
||||
Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
|
||||
-->
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<parent>
|
||||
<artifactId>aggregator-microservices</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.24.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<parent>
|
||||
<artifactId>aggregator-microservices</artifactId>
|
||||
<groupId>com.iluwatar</groupId>
|
||||
<version>1.21.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
|
||||
<artifactId>information-microservice</artifactId>
|
||||
<packaging>jar</packaging>
|
||||
<artifactId>information-microservice</artifactId>
|
||||
<packaging>jar</packaging>
|
||||
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework</groupId>
|
||||
<artifactId>spring-webmvc</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-web</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<dependencyManagement>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-dependencies</artifactId>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</dependencyManagement>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework</groupId>
|
||||
<artifactId>spring-webmvc</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-web</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-api</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.junit.jupiter</groupId>
|
||||
<artifactId>junit-jupiter-engine</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>repackage</goal>
|
||||
</goals>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-assembly-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>com.iluwatar.information.microservices.InformationApplication</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
<version>${spring-boot.version}</version>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>repackage</goal>
|
||||
</goals>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.information.microservice;
|
||||
|
||||
import org.springframework.boot.SpringApplication;
|
||||
|
||||
@ -1,17 +1,17 @@
|
||||
/*
|
||||
/**
|
||||
* The MIT License
|
||||
* Copyright © 2014-2019 Ilkka Seppälä
|
||||
*
|
||||
* Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
* <p/>
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* <p/>
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* <p/>
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
@ -20,7 +20,6 @@
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
package com.iluwatar.information.microservice;
|
||||
|
||||
import org.springframework.web.bind.annotation.RequestMapping;
|
||||
@ -28,7 +27,7 @@ import org.springframework.web.bind.annotation.RequestMethod;
|
||||
import org.springframework.web.bind.annotation.RestController;
|
||||
|
||||
/**
|
||||
* Controller providing endpoints to retrieve information about products.
|
||||
* Controller providing endpoints to retrieve information about products
|
||||
*/
|
||||
@RestController
|
||||
public class InformationController {
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
#
|
||||
# The MIT License
|
||||
# Copyright © 2014-2019 Ilkka Seppälä
|
||||
# Copyright (c) 2014-2016 Ilkka Seppälä
|
||||
#
|
||||
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
# of this software and associated documentation files (the "Software"), to deal
|
||||
@ -20,4 +20,5 @@
|
||||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
# THE SOFTWARE.
|
||||
#
|
||||
|
||||
server.port=51515
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user