Update README.md

# Conflicts:
#	.all-contributorsrc
#	README.md

.all-contributorsrc

@@ -1296,51 +1296,6 @@
       "contributions": [
         "doc"
       ]
-    },
-    {
-      "login": "omk13",
-      "name": "Omar Karazoun",
-      "avatar_url": "https://avatars0.githubusercontent.com/u/59054172?v=4",
-      "profile": "https://github.com/omk13",
-      "contributions": [
-        "code"
-      ]
-    },
-    {
-      "login": "jeff303",
-      "name": "Jeff Evans",
-      "avatar_url": "https://avatars0.githubusercontent.com/u/3521562?v=4",
-      "profile": "https://github.com/jeff303",
-      "contributions": [
-        "code"
-      ]
-    },
-    {
-      "login": "viveksb007",
-      "name": "Vivek Singh",
-      "avatar_url": "https://avatars1.githubusercontent.com/u/12713808?v=4",
-      "profile": "https://viveksb007.github.io",
-      "contributions": [
-        "code"
-      ]
-    },
-    {
-      "login": "siavashsoleymani",
-      "name": "siavash",
-      "avatar_url": "https://avatars2.githubusercontent.com/u/18074419?v=4",
-      "profile": "https://github.com/siavashsoleymani",
-      "contributions": [
-        "code"
-      ]
-    },
-    {
-      "login": "ruchpeanuts",
-      "name": "ruchpeanuts",
-      "avatar_url": "https://avatars0.githubusercontent.com/u/29301900?v=4",
-      "profile": "https://github.com/ruchpeanuts",
-      "contributions": [
-        "doc"
-      ]
     }
   ],
   "contributorsPerLine": 4,

README.md

@@ -10,7 +10,7 @@
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=iluwatar_java-design-patterns&metric=coverage)](https://sonarcloud.io/dashboard?id=iluwatar_java-design-patterns)
 [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](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 -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-147-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-142-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 # Introduction
@@ -282,13 +282,6 @@ This project is licensed under the terms of the MIT license.
   <tr>
     <td align="center"><a href="https://ibrahimalii.github.io/"><img src="https://avatars2.githubusercontent.com/u/21141301?v=4" 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" 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" 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" 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" 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" 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" 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>
   </tr>
 </table>
 

data-transfer-object-enum-impl/README.md

@@ -1,54 +0,0 @@
----
-layout: pattern
-title: Data Transfer Object
-folder: data-transfer-object
-permalink: /patterns/data-transfer-object/
-categories: Architectural
-tags:
- - Performance
----
-
-## Intent
-
-Pass data with multiple attributes in one shot from client to server, to avoid multiple calls to 
-remote server. 
-
-## Explanation
-
-Real world example
-
-> We need to fetch information about customers from remote database. Instead of querying the 
-> attributes one at a time, we use DTOs to transfer all the relevant attributes in a single shot.     
-
-In plain words
-
-> Using DTO relevant information can be fetched with a single backend query. 
-
-Wikipedia says
-
-> In the field of programming a data transfer object (DTO) is an object that carries data between 
-> processes. The motivation for its use is that communication between processes is usually done 
-> resorting to remote interfaces (e.g. web services), where each call is an expensive operation. 
-> Because the majority of the cost of each call is related to the round-trip time between the client 
-> and the server, one way of reducing the number of calls is to use an object (the DTO) that 
-> aggregates the data that would have been transferred by the several calls, but that is served by 
-> one call only.
-
-## Class diagram
-
-![alt text](./etc/dto-enum-uml.png "data-transfer-object")
-
-## Applicability
-
-Use the Data Transfer Object pattern when:
-
-* The client is asking for multiple information. And the information is related.
-* When you want to boost the performance to get resources.
-* You want reduced number of remote calls.
-
-## Credits
-
-* [Design Pattern - Transfer Object Pattern](https://www.tutorialspoint.com/design_pattern/transfer_object_pattern.htm)
-* [Data Transfer Object](https://msdn.microsoft.com/en-us/library/ff649585.aspx)
-* [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=f27d2644fbe5026ea448791a8ad09c94)
-* [Patterns of Enterprise Application Architecture](https://www.amazon.com/gp/product/0321127420/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0321127420&linkCode=as2&tag=javadesignpat-20&linkId=014237a67c9d46f384b35e10151956bd)

data-transfer-object-enum-impl/etc/data-transfer-object-enum-impl.urm.puml

@@ -1,129 +0,0 @@
-@startuml
-package com.iluwatar.datatransferenum {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  class Product {
-    - cost : Double
-    - id : Long
-    - name : String
-    - price : Double
-    - supplier : String
-    + Product()
-    + getCost() : Double
-    + getId() : Long
-    + getName() : String
-    + getPrice() : Double
-    + getSupplier() : String
-    + setCost(cost : Double) : Product
-    + setId(id : Long) : Product
-    + setName(name : String) : Product
-    + setPrice(price : Double) : Product
-    + setSupplier(supplier : String) : Product
-    + toString() : String
-  }
-  enum ProductDTO {
-    + valueOf(name : String) : ProductDTO {static}
-    + values() : ProductDTO[] {static}
-  }
-  -interface Cost {
-    + getCost() : Double {abstract}
-  }
-  -interface Id {
-    + getId() : Long {abstract}
-  }
-  -interface Name {
-    + getName() : String {abstract}
-  }
-  -interface Price {
-    + getPrice() : Double {abstract}
-  }
-  enum Request {
-    + valueOf(name : String) : Request {static}
-    + values() : Request[] {static}
-  }
-  class Create {
-    - cost : Double
-    - name : String
-    - price : Double
-    - supplier : String
-    + Create()
-    + getCost() : Double
-    + getName() : String
-    + getPrice() : Double
-    + getSupplier() : String
-    + setCost(cost : Double) : Create
-    + setName(name : String) : Create
-    + setPrice(price : Double) : Create
-    + setSupplier(supplier : String) : Create
-  }
-  enum Response {
-    + valueOf(name : String) : Response {static}
-    + values() : Response[] {static}
-  }
-  class Private {
-    - cost : Double
-    - id : Long
-    - name : String
-    - price : Double
-    + Private()
-    + getCost() : Double
-    + getId() : Long
-    + getName() : String
-    + getPrice() : Double
-    + setCost(cost : Double) : Private
-    + setId(id : Long) : Private
-    + setName(name : String) : Private
-    + setPrice(price : Double) : Private
-    + toString() : String
-  }
-  class Public {
-    - id : Long
-    - name : String
-    - price : Double
-    + Public()
-    + getId() : Long
-    + getName() : String
-    + getPrice() : Double
-    + setId(id : Long) : Public
-    + setName(name : String) : Public
-    + setPrice(price : Double) : Public
-    + toString() : String
-  }
-  -interface Supplier {
-    + getSupplier() : String {abstract}
-  }
-  class ProductResource {
-    - products : List<Product>
-    + ProductResource(products : List<Product>)
-    + getAllProductsForAdmin() : List<Private>
-    + getAllProductsForCustomer() : List<Public>
-    + getProducts() : List<Product>
-    + save(createProductDTO : Create)
-  }
-}
-Create ..+ Request
-Request ..+ ProductDTO
-Private ..+ Response
-Supplier ..+ ProductDTO
-Name ..+ ProductDTO
-ProductResource -->  "-products" Product
-Public ..+ Response
-Id ..+ ProductDTO
-Price ..+ ProductDTO
-Response ..+ ProductDTO
-Cost ..+ ProductDTO
-Create ..|> Name 
-Create ..|> Price 
-Create ..|> Cost 
-Create ..|> Supplier 
-Private ..|> Id 
-Private ..|> Name 
-Private ..|> Price 
-Private ..|> Cost 
-Public ..|> Id 
-Public ..|> Name 
-Public ..|> Price 
-@enduml

data-transfer-object-enum-impl/pom.xml

@@ -1,61 +0,0 @@
-<?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: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" xmlns="http://maven.apache.org/POM/4.0.0">
-    <modelVersion>4.0.0</modelVersion>
-    <parent>
-        <groupId>com.iluwatar</groupId>
-        <artifactId>java-design-patterns</artifactId>
-        <version>1.24.0-SNAPSHOT</version>
-    </parent>
-    <artifactId>data-transfer-object-enum-impl</artifactId>
-    <dependencies>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-assembly-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <configuration>
-                            <archive>
-                                <manifest>
-                                    <mainClass>com.iluwatar.datatransferenum.App</mainClass>
-                                </manifest>
-                            </archive>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-</project>

data-transfer-object-enum-impl/src/main/java/com/iluwatar/datatransferenum/App.java

@@ -1,59 +0,0 @@
-package com.iluwatar.datatransferenum;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * The Data Transfer Object pattern is a design pattern in which an data transfer object is used to
- * serve related information together to avoid multiple call for each piece of information.
- *
- * <p>In this example, ({@link App}) as as product details consumer i.e. client to
- * request for product details to server.
- *
- * <p>productResource ({@link ProductResource}) act as server to serve product information. And
- * The productDto ({@link ProductDto} is data transfer object to share product information.
- */
-public class App {
-
-  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-
-  /**
-   * Method as act client and request to server for details.
-   *
-   * @param args program argument.
-   */
-  public static void main(String[] args) {
-    Product tv =
-        new Product().setId(1L).setName("TV").setSupplier("Sony").setPrice(1000D).setCost(1090D);
-    Product microwave =
-        new Product().setId(2L).setName("microwave").setSupplier("Delonghi").setPrice(1000D)
-            .setCost(1090D);
-    Product refrigerator =
-        new Product().setId(3L).setName("refrigerator").setSupplier("Botsch").setPrice(1000D)
-            .setCost(1090D);
-    Product airConditioner =
-        new Product().setId(4L).setName("airConditioner").setSupplier("LG").setPrice(1000D)
-            .setCost(1090D);
-    List<Product> products =
-        new ArrayList<>(Arrays.asList(tv, microwave, refrigerator, airConditioner));
-    ProductResource productResource = new ProductResource(products);
-
-    LOGGER.info("####### List of products including sensitive data just for admins: \n {}",
-        Arrays.toString(productResource.getAllProductsForAdmin().toArray()));
-    LOGGER.info("####### List of products for customers: \n {}",
-        Arrays.toString(productResource.getAllProductsForCustomer().toArray()));
-
-    LOGGER.info("####### Going to save Sony PS5 ...");
-    ProductDto.Request.Create createProductRequestDto = new ProductDto.Request.Create()
-        .setName("PS5")
-        .setCost(1000D)
-        .setPrice(1220D)
-        .setSupplier("Sony");
-    productResource.save(createProductRequestDto);
-    LOGGER.info("####### List of products after adding PS5: {}",
-        Arrays.toString(productResource.getProducts().toArray()));
-  }
-}

data-transfer-object-enum-impl/src/main/java/com/iluwatar/datatransferenum/Product.java

@@ -1,91 +0,0 @@
-package com.iluwatar.datatransferenum;
-
-/**
- * {@link Product} is a entity class for product entity. This class act as entity in the demo.
- */
-public final class Product {
-  private Long id;
-  private String name;
-  private Double price;
-  private Double cost;
-  private String supplier;
-
-  /**
-   * Constructor.
-   *
-   * @param id       product id
-   * @param name     product name
-   * @param price    product price
-   * @param cost     product cost
-   * @param supplier product supplier
-   */
-  public Product(Long id, String name, Double price, Double cost, String supplier) {
-    this.id = id;
-    this.name = name;
-    this.price = price;
-    this.cost = cost;
-    this.supplier = supplier;
-  }
-
-  /**
-   * Constructor.
-   */
-  public Product() {
-  }
-
-  public Long getId() {
-    return id;
-  }
-
-  public Product setId(Long id) {
-    this.id = id;
-    return this;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  public Product setName(String name) {
-    this.name = name;
-    return this;
-  }
-
-  public Double getPrice() {
-    return price;
-  }
-
-  public Product setPrice(Double price) {
-    this.price = price;
-    return this;
-  }
-
-  public Double getCost() {
-    return cost;
-  }
-
-  public Product setCost(Double cost) {
-    this.cost = cost;
-    return this;
-  }
-
-  public String getSupplier() {
-    return supplier;
-  }
-
-  public Product setSupplier(String supplier) {
-    this.supplier = supplier;
-    return this;
-  }
-
-  @Override
-  public String toString() {
-    return "Product{"
-        + "id=" + id
-        + ", name='" + name + '\''
-        + ", price=" + price
-        + ", cost=" + cost
-        + ", supplier='" + supplier + '\''
-        + '}';
-  }
-}

data-transfer-object-enum-impl/src/main/java/com/iluwatar/datatransferenum/ProductDto.java

@@ -1,264 +0,0 @@
-package com.iluwatar.datatransferenum;
-
-/**
- * {@link ProductDto} is a data transfer object POJO.
- * Instead of sending individual information to
- * client We can send related information together in POJO.
- *
- * <p>Dto will not have any business logic in it.
- */
-public enum ProductDto {
-  ;
-
-  /**
-   * This is Request class which consist of Create or any other request DTO's
-   * you might want to use in your API.
-   */
-  public enum Request {
-    ;
-
-    /**
-     * This is Create dto class for requesting create new product.
-     */
-    public static final class Create implements Name, Price, Cost, Supplier {
-      private String name;
-      private Double price;
-      private Double cost;
-      private String supplier;
-
-      @Override
-      public String getName() {
-        return name;
-      }
-
-      public Create setName(String name) {
-        this.name = name;
-        return this;
-      }
-
-      @Override
-      public Double getPrice() {
-        return price;
-      }
-
-      public Create setPrice(Double price) {
-        this.price = price;
-        return this;
-      }
-
-      @Override
-      public Double getCost() {
-        return cost;
-      }
-
-      public Create setCost(Double cost) {
-        this.cost = cost;
-        return this;
-      }
-
-      @Override
-      public String getSupplier() {
-        return supplier;
-      }
-
-      public Create setSupplier(String supplier) {
-        this.supplier = supplier;
-        return this;
-      }
-    }
-  }
-
-  /**
-   * This is Response class which consist of any response DTO's
-   * you might want to provide to your clients.
-   */
-  public enum Response {
-    ;
-
-    /**
-     * This is Public dto class for API response with the lowest data security.
-     */
-    public static final class Public implements Id, Name, Price {
-      private Long id;
-      private String name;
-      private Double price;
-
-      @Override
-      public Long getId() {
-        return id;
-      }
-
-      public Public setId(Long id) {
-        this.id = id;
-        return this;
-      }
-
-      @Override
-      public String getName() {
-        return name;
-      }
-
-      public Public setName(String name) {
-        this.name = name;
-        return this;
-      }
-
-      @Override
-      public Double getPrice() {
-        return price;
-      }
-
-      public Public setPrice(Double price) {
-        this.price = price;
-        return this;
-      }
-
-      @Override
-      public String toString() {
-        return "Public{"
-            + "id="
-            + id
-            + ", name='"
-            + name
-            + '\''
-            + ", price="
-            + price
-            + '}';
-      }
-    }
-
-    /**
-     * This is Private dto class for API response with the highest data security.
-     */
-    public static final class Private implements Id, Name, Price, Cost {
-      private Long id;
-      private String name;
-      private Double price;
-      private Double cost;
-
-      @Override
-      public Long getId() {
-        return id;
-      }
-
-      public Private setId(Long id) {
-        this.id = id;
-        return this;
-      }
-
-      @Override
-      public String getName() {
-        return name;
-      }
-
-      public Private setName(String name) {
-        this.name = name;
-        return this;
-      }
-
-      @Override
-      public Double getPrice() {
-        return price;
-      }
-
-      public Private setPrice(Double price) {
-        this.price = price;
-        return this;
-      }
-
-      @Override
-      public Double getCost() {
-        return cost;
-      }
-
-      public Private setCost(Double cost) {
-        this.cost = cost;
-        return this;
-      }
-
-      @Override
-      public String toString() {
-        return "Private{"
-            +
-            "id="
-            + id
-            +
-            ", name='"
-            + name
-            + '\''
-            +
-            ", price="
-            + price
-            +
-            ", cost="
-            + cost
-            +
-            '}';
-      }
-    }
-  }
-
-  /**
-   * Use this interface whenever you want to provide the product Id in your DTO.
-   */
-  private interface Id {
-    /**
-     * Unique identifier of the product.
-     *
-     * @return : id of the product.
-     */
-    Long getId();
-  }
-
-  /**
-   * Use this interface whenever you want to provide the product Name in your DTO.
-   */
-  private interface Name {
-    /**
-     * The name of the product.
-     *
-     * @return : name of the product.
-     */
-    String getName();
-  }
-
-  /**
-   * Use this interface whenever you want to provide the product Price in your DTO.
-   */
-  private interface Price {
-    /**
-     * The amount we sell a product for.
-     * <b>This data is not confidential</b>
-     *
-     * @return : price of the product.
-     */
-    Double getPrice();
-  }
-
-  /**
-   * Use this interface whenever you want to provide the product Cost in your DTO.
-   */
-  private interface Cost {
-    /**
-     * The amount that it costs us to purchase this product
-     * For the amount we sell a product for, see the {@link Price Price} parameter.
-     * <b>This data is confidential</b>
-     *
-     * @return : cost of the product.
-     */
-    Double getCost();
-  }
-
-  /**
-   * Use this interface whenever you want to provide the product Supplier in your DTO.
-   */
-  private interface Supplier {
-    /**
-     * The name of supplier of the product or its manufacturer.
-     * <b>This data is highly confidential</b>
-     *
-     * @return : supplier of the product.
-     */
-    String getSupplier();
-  }
-}

data-transfer-object-enum-impl/src/main/java/com/iluwatar/datatransferenum/ProductResource.java

@@ -1,71 +0,0 @@
-package com.iluwatar.datatransferenum;
-
-import java.util.List;
-import java.util.stream.Collectors;
-
-/**
- * The resource class which serves product information. This class act as server in the demo. Which
- * has all product details.
- */
-public class ProductResource {
-  private final List<Product> products;
-
-  /**
-   * Initialise resource with existing products.
-   *
-   * @param products initialize resource with existing products. Act as database.
-   */
-  public ProductResource(final List<Product> products) {
-    this.products = products;
-  }
-
-  /**
-   * Get all products.
-   *
-   * @return : all products in list but in the scheme of private dto.
-   */
-  public List<ProductDto.Response.Private> getAllProductsForAdmin() {
-    return products
-        .stream()
-        .map(p -> new ProductDto.Response.Private().setId(p.getId()).setName(p.getName())
-            .setCost(p.getCost())
-            .setPrice(p.getPrice()))
-        .collect(Collectors.toList());
-  }
-
-  /**
-   * Get all products.
-   *
-   * @return : all products in list but in the scheme of public dto.
-   */
-  public List<ProductDto.Response.Public> getAllProductsForCustomer() {
-    return products
-        .stream()
-        .map(p -> new ProductDto.Response.Public().setId(p.getId()).setName(p.getName())
-            .setPrice(p.getPrice()))
-        .collect(Collectors.toList());
-  }
-
-  /**
-   * Save new product.
-   *
-   * @param createProductDto save new product to list.
-   */
-  public void save(ProductDto.Request.Create createProductDto) {
-    products.add(new Product()
-        .setId((long) (products.size() + 1))
-        .setName(createProductDto.getName())
-        .setSupplier(createProductDto.getSupplier())
-        .setPrice(createProductDto.getPrice())
-        .setCost(createProductDto.getCost()));
-  }
-
-  /**
-   * List of all products in an entity representation.
-   *
-   * @return : all the products entity that stored in the products list
-   */
-  public List<Product> getProducts() {
-    return products;
-  }
-}

data-transfer-object-enum-impl/src/test/java/com/iluwatar/datatransferenum/AppTest.java

@@ -1,44 +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.datatransferenum;
-
-import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
-
-
-import org.junit.jupiter.api.Test;
-
-class AppTest {
-
-  /**
-   * Issue: Add at least one assertion to this test case.
-   * <p>
-   * Solution: Inserted assertion to check whether the execution of the main method in {@link App#main(String[])}
-   * throws an exception.
-   */
-
-  @Test
-  void shouldExecuteApplicationWithoutException() {
-    assertDoesNotThrow(() -> App.main(new String[] {}));
-  }
-}

factory/README.md

@@ -98,7 +98,7 @@ Now on the client code we can create different types of cars using the factory c
 var car1 = CarsFactory.getCar(CarType.FORD);
 var car2 = CarsFactory.getCar(CarType.FERRARI);
 LOGGER.info(car1.getDescription());
-LOGGER.info(car2.getDescription());
+LOGGER.info(car2.getDescription());;
 ```
 
 Program output:
@@ -126,16 +126,6 @@ Cons
 
 * The code becomes more complicated than it should be. 
 
-## Real world examples
-
-* [java.util.Calendar#getInstance()](https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance--)
-* [java.util.ResourceBundle#getBundle()](https://docs.oracle.com/javase/8/docs/api/java/util/ResourceBundle.html#getBundle-java.lang.String-)
-* [java.text.NumberFormat#getInstance()](https://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html#getInstance--)
-* [java.nio.charset.Charset#forName()](https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html#forName-java.lang.String-)
-* [java.net.URLStreamHandlerFactory#createURLStreamHandler(String)](https://docs.oracle.com/javase/8/docs/api/java/net/URLStreamHandlerFactory.html) (Returns different singleton objects, depending on a protocol)
-* [java.util.EnumSet#of()](https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html#of(E))
-* [javax.xml.bind.JAXBContext#createMarshaller()](https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/JAXBContext.html#createMarshaller--) and other similar methods.
-
 ## Related patterns
 
 * [Factory Method](https://java-design-patterns.com/patterns/factory-method/)

game-loop/src/test/java/com/iluwatar/gameloop/AppTest.java

@@ -23,7 +23,7 @@
 
 package com.iluwatar.gameloop;
 
-import org.junit.jupiter.api.Test;
+import org.junit.Test;
 
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 

game-loop/src/test/java/com/iluwatar/gameloop/FixedStepGameLoopTest.java

@@ -23,11 +23,10 @@
 
 package com.iluwatar.gameloop;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.After;
-
+import org.junit.Assert;
-import org.junit.jupiter.api.Test;
+import org.junit.Before;
-import org.junit.jupiter.api.AfterEach;
+import org.junit.Test;
-import org.junit.jupiter.api.BeforeEach;
 
 /**
  * FixedStepGameLoop unit test class.
@@ -36,12 +35,12 @@ public class FixedStepGameLoopTest {
 
   private FixedStepGameLoop gameLoop;
 
-  @BeforeEach
+  @Before
   public void setup() {
     gameLoop = new FixedStepGameLoop();
   }
 
-  @AfterEach
+  @After
   public void tearDown() {
     gameLoop = null;
   }
@@ -49,7 +48,7 @@ public class FixedStepGameLoopTest {
   @Test
   public void testUpdate() {
     gameLoop.update();
-    assertEquals(0.01f, gameLoop.controller.getBulletPosition(), 0);
+    Assert.assertEquals(0.01f, gameLoop.controller.getBulletPosition(), 0);
   }
 
 }

game-loop/src/test/java/com/iluwatar/gameloop/FrameBasedGameLoopTest.java

@@ -23,10 +23,10 @@
 
 package com.iluwatar.gameloop;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.After;
-
+import org.junit.Assert;
-import org.junit.jupiter.api.AfterEach;
+import org.junit.Before;
-import org.junit.jupiter.api.BeforeEach;
+import org.junit.Test;
 
 /**
  * FrameBasedGameLoop unit test class.
@@ -35,19 +35,19 @@ public class FrameBasedGameLoopTest {
 
   private FrameBasedGameLoop gameLoop;
 
-  @BeforeEach
+  @Before
   public void setup() {
     gameLoop = new FrameBasedGameLoop();
   }
 
-  @AfterEach
+  @After
   public void tearDown() {
     gameLoop = null;
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testUpdate() {
     gameLoop.update();
-    assertEquals(0.5f, gameLoop.controller.getBulletPosition(), 0);
+    Assert.assertEquals(0.5f, gameLoop.controller.getBulletPosition(), 0);
   }
 }

game-loop/src/test/java/com/iluwatar/gameloop/GameControllerTest.java

@@ -23,33 +23,34 @@
 
 package com.iluwatar.gameloop;
 
-import org.junit.jupiter.api.Assertions;
+import org.junit.After;
-import org.junit.jupiter.api.AfterEach;
+import org.junit.Assert;
-import org.junit.jupiter.api.BeforeEach;
+import org.junit.Before;
+import org.junit.Test;
 
 public class GameControllerTest {
 
   private GameController controller;
 
-  @BeforeEach
+  @Before
   public void setup() {
     controller = new GameController();
   }
 
-  @AfterEach
+  @After
   public void tearDown() {
     controller = null;
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testMoveBullet() {
     controller.moveBullet(1.5f);
-    Assertions.assertEquals(1.5f, controller.bullet.getPosition(), 0);
+    Assert.assertEquals(1.5f, controller.bullet.getPosition(), 0);
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testGetBulletPosition() {
-    Assertions.assertEquals(controller.bullet.getPosition(), controller.getBulletPosition(), 0);
+    Assert.assertEquals(controller.bullet.getPosition(), controller.getBulletPosition(), 0);
   }
 
 }

game-loop/src/test/java/com/iluwatar/gameloop/GameLoopTest.java

@@ -23,9 +23,10 @@
 
 package com.iluwatar.gameloop;
 
-import org.junit.jupiter.api.AfterEach;
+import org.junit.After;
-import org.junit.jupiter.api.Assertions;
+import org.junit.Assert;
-import org.junit.jupiter.api.BeforeEach;
+import org.junit.Before;
+import org.junit.Test;
 
 /**
  * GameLoop unit test class.
@@ -37,7 +38,7 @@ public class GameLoopTest {
   /**
    * Create mock implementation of GameLoop.
    */
-  @BeforeEach
+  @Before
   public void setup() {
     gameLoop = new GameLoop() {
       @Override
@@ -45,26 +46,26 @@ public class GameLoopTest {
     };
   }
 
-  @AfterEach
+  @After
   public void tearDown() {
     gameLoop = null;
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testRun() {
     gameLoop.run();
-    Assertions.assertEquals(GameStatus.RUNNING, gameLoop.status);
+    Assert.assertEquals(GameStatus.RUNNING, gameLoop.status);
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testStop() {
     gameLoop.stop();
-    Assertions.assertEquals(GameStatus.STOPPED, gameLoop.status);
+    Assert.assertEquals(GameStatus.STOPPED, gameLoop.status);
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testIsGameRunning() {
-    Assertions.assertFalse(gameLoop.isGameRunning());
+    Assert.assertFalse(gameLoop.isGameRunning());
   }
 
 }

game-loop/src/test/java/com/iluwatar/gameloop/VariableStepGameLoopTest.java

@@ -23,9 +23,11 @@
 
 package com.iluwatar.gameloop;
 
-import org.junit.jupiter.api.Assertions;
+import java.lang.reflect.InvocationTargetException;
-import org.junit.jupiter.api.AfterEach;
+import org.junit.After;
-import org.junit.jupiter.api.BeforeEach;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
 
 /**
  * VariableStepGameLoop unit test class.
@@ -34,19 +36,19 @@ public class VariableStepGameLoopTest {
 
   private VariableStepGameLoop gameLoop;
 
-  @BeforeEach
+  @Before
   public void setup() {
     gameLoop = new VariableStepGameLoop();
   }
 
-  @AfterEach
+  @After
   public void tearDown() {
     gameLoop = null;
   }
 
-  @org.junit.jupiter.api.Test
+  @Test
   public void testUpdate() {
     gameLoop.update(20L);
-    Assertions.assertEquals(0.01f, gameLoop.controller.getBulletPosition(), 0);
+    Assert.assertEquals(0.01f, gameLoop.controller.getBulletPosition(), 0);
   }
 }

pom.xml

@@ -195,11 +195,9 @@
         <module>strangler</module>
         <module>arrange-act-assert</module>
         <module>transaction-script</module>
-        <module>registry</module>
         <module>filterer</module>
         <module>factory</module>
         <module>separated-interface</module>
-        <module>data-transfer-object-enum-impl</module>
     </modules>
 
     <repositories>

registry/README.md

@@ -1,86 +0,0 @@
----
-layout: pattern
-title: Registry
-folder: registry
-permalink: /patterns/registry/
-categories: Creational
-tags:
- - Instantiation
----
-
-## Intent
-Stores the objects of a single class and provide a global point of access to them. 
-Similar to Multiton pattern, only difference is that in a registry there is no restriction on the number of objects.
-
-## Explanation
-
-In Plain Words
-
-> Registry is a well-known object that other objects can use to find common objects and services.
-
-**Programmatic Example**
-Below is a `Customer` Class
-
-```java
-public class Customer {
-
-  private final String id;
-  private final String name;
-
-  public Customer(String id, String name) {
-    this.id = id;
-    this.name = name;
-  }
-
-  public String getId() {
-    return id;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-}
-```
-
-This registry of the `Customer` objects is `CustomerRegistry`
-```java
-public final class CustomerRegistry {
-
-  private static final CustomerRegistry instance = new CustomerRegistry();
-
-  public static CustomerRegistry getInstance() {
-    return instance;
-  }
-
-  private final Map<String, Customer> customerMap;
-
-  private CustomerRegistry() {
-    customerMap = new ConcurrentHashMap<>();
-  }
-
-  public Customer addCustomer(Customer customer) {
-    return customerMap.put(customer.getId(), customer);
-  }
-
-  public Customer getCustomer(String id) {
-    return customerMap.get(id);
-  }
-
-}
-```
-
-## Class diagram
-![Registry](./etc/registry.png)
-
-## Applicability
-Use Registry pattern when 
-
-* client wants reference of some object, so client can lookup for that object in the object's registry.
-
-## Consequences
-Large number of bulky objects added to registry would result in a lot of memory consumption as objects in the registry are not garbage collected.
-
-## Credits
-* https://www.martinfowler.com/eaaCatalog/registry.html
-* https://wiki.c2.com/?RegistryPattern

registry/etc/registry.urm.puml

@@ -1,21 +0,0 @@
-@startuml
-package com.iluwatar.registry {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  class Customer {
-    - id : String
-    - name : String
-    + getId() : String
-    + getName() : String
-    + toString() : String
-  }
-  class CustomerRegistry {
-    + addCustomer(customer : Customer)
-    + getCustomer(id : String)
-  }
-}
-Customer --> "-addCustomer" CustomerRegistry
-@enduml

registry/pom.xml

@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<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>
-  </parent>
-  <artifactId>registry</artifactId>
-
-  <dependencies>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-    </dependency>
-  </dependencies>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <executions>
-          <execution>
-            <configuration>
-              <archive>
-                <manifest>
-                  <mainClass>com.iluwatar.registry.App</mainClass>
-                </manifest>
-              </archive>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-
-</project>

registry/src/main/java/com/iluwatar/registry/App.java

@@ -1,27 +0,0 @@
-package com.iluwatar.registry;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public class App {
-
-  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
-
-  /**
-   * Program entry point.
-   *
-   * @param args command line args
-   */
-  public static void main(String[] args) {
-    CustomerRegistry customerRegistry = CustomerRegistry.getInstance();
-    var john = new Customer("1", "John");
-    customerRegistry.addCustomer(john);
-
-    var julia = new Customer("2", "Julia");
-    customerRegistry.addCustomer(julia);
-
-    LOGGER.info("John {}", customerRegistry.getCustomer("1"));
-    LOGGER.info("Julia {}", customerRegistry.getCustomer("2"));
-  }
-
-}

registry/src/main/java/com/iluwatar/registry/Customer.java

@@ -1,28 +0,0 @@
-package com.iluwatar.registry;
-
-public class Customer {
-
-  private final String id;
-  private final String name;
-
-  public Customer(String id, String name) {
-    this.id = id;
-    this.name = name;
-  }
-
-  public String getId() {
-    return id;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  @Override
-  public String toString() {
-    return "Customer{"
-        + "id='" + id + '\''
-        + ", name='" + name + '\''
-        + '}';
-  }
-}

registry/src/main/java/com/iluwatar/registry/CustomerRegistry.java

@@ -1,28 +0,0 @@
-package com.iluwatar.registry;
-
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-public final class CustomerRegistry {
-
-  private static final CustomerRegistry instance = new CustomerRegistry();
-
-  public static CustomerRegistry getInstance() {
-    return instance;
-  }
-
-  private final Map<String, Customer> customerMap;
-
-  private CustomerRegistry() {
-    customerMap = new ConcurrentHashMap<>();
-  }
-
-  public Customer addCustomer(Customer customer) {
-    return customerMap.put(customer.getId(), customer);
-  }
-
-  public Customer getCustomer(String id) {
-    return customerMap.get(id);
-  }
-
-}

registry/src/test/java/com/iluwatar/registry/CustomerRegistryTest.java

@@ -1,44 +0,0 @@
-package com.iluwatar.registry;
-
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Test;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertNull;
-
-public class CustomerRegistryTest {
-
-  private static CustomerRegistry customerRegistry;
-
-  @BeforeAll
-  public static void setUp() {
-    customerRegistry = CustomerRegistry.getInstance();
-  }
-
-  @Test
-  public void shouldBeAbleToAddAndQueryCustomerObjectFromRegistry() {
-    Customer john = new Customer("1", "john");
-    Customer julia = new Customer("2", "julia");
-
-    customerRegistry.addCustomer(john);
-    customerRegistry.addCustomer(julia);
-
-    Customer customerWithId1 = customerRegistry.getCustomer("1");
-    assertNotNull(customerWithId1);
-    assertEquals("1", customerWithId1.getId());
-    assertEquals("john", customerWithId1.getName());
-
-    Customer customerWithId2 = customerRegistry.getCustomer("2");
-    assertNotNull(customerWithId2);
-    assertEquals("2", customerWithId2.getId());
-    assertEquals("julia", customerWithId2.getName());
-  }
-
-  @Test
-  public void shouldReturnNullWhenQueriedCustomerIsNotInRegistry() {
-    Customer customerWithId5 = customerRegistry.getCustomer("5");
-    assertNull(customerWithId5);
-  }
-
-}

zh/bridge/README.md

@@ -1,205 +0,0 @@
----
-layout: pattern
-title: Bridge
-folder: bridge
-permalink: /patterns/bridge/
-categories: Structural
-tags:
- - Gang of Four
----
-
-## 又被称为
-
-手柄/身体模式
-
-## 目的
-
-将抽象与其实现分离，以便二者可以独立变化。
-
-## 解释
-
-真实世界例子
-
-> 考虑一下你拥有一种具有不同附魔的武器，并且应该允许将具有不同附魔的不同武器混合使用。 你会怎么做？ 为每个附魔创建每种武器的多个副本，还是只是创建单独的附魔并根据需要为武器设置它？ 桥接模式使您可以进行第二次操作。
-
-通俗的说
-
-> 桥接模式是一个更推荐组合而不是继承的模式。将实现细节从一个层次结构推送到具有单独层次结构的另一个对象。
-
-维基百科说
-
-> 桥接模式是软件工程中使用的一种设计模式，旨在“将抽象与其实现分离，从而使两者可以独立变化”
-
-**程序示例**
-
-翻译一下上面的武器示例。下面我们有武器的类层级：
-
-```java
-public interface Weapon {
-  void wield();
-  void swing();
-  void unwield();
-  Enchantment getEnchantment();
-}
-
-public class Sword implements Weapon {
-
-  private final Enchantment enchantment;
-
-  public Sword(Enchantment enchantment) {
-    this.enchantment = enchantment;
-  }
-
-  @Override
-  public void wield() {
-    LOGGER.info("The sword is wielded.");
-    enchantment.onActivate();
-  }
-
-  @Override
-  public void swing() {
-    LOGGER.info("The sword is swinged.");
-    enchantment.apply();
-  }
-
-  @Override
-  public void unwield() {
-    LOGGER.info("The sword is unwielded.");
-    enchantment.onDeactivate();
-  }
-
-  @Override
-  public Enchantment getEnchantment() {
-    return enchantment;
-  }
-}
-
-public class Hammer implements Weapon {
-
-  private final Enchantment enchantment;
-
-  public Hammer(Enchantment enchantment) {
-    this.enchantment = enchantment;
-  }
-
-  @Override
-  public void wield() {
-    LOGGER.info("The hammer is wielded.");
-    enchantment.onActivate();
-  }
-
-  @Override
-  public void swing() {
-    LOGGER.info("The hammer is swinged.");
-    enchantment.apply();
-  }
-
-  @Override
-  public void unwield() {
-    LOGGER.info("The hammer is unwielded.");
-    enchantment.onDeactivate();
-  }
-
-  @Override
-  public Enchantment getEnchantment() {
-    return enchantment;
-  }
-}
-```
-
-这里是单独的附魔类结构：
-
-```java
-public interface Enchantment {
-  void onActivate();
-  void apply();
-  void onDeactivate();
-}
-
-public class FlyingEnchantment implements Enchantment {
-
-  @Override
-  public void onActivate() {
-    LOGGER.info("The item begins to glow faintly.");
-  }
-
-  @Override
-  public void apply() {
-    LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand.");
-  }
-
-  @Override
-  public void onDeactivate() {
-    LOGGER.info("The item's glow fades.");
-  }
-}
-
-public class SoulEatingEnchantment implements Enchantment {
-
-  @Override
-  public void onActivate() {
-    LOGGER.info("The item spreads bloodlust.");
-  }
-
-  @Override
-  public void apply() {
-    LOGGER.info("The item eats the soul of enemies.");
-  }
-
-  @Override
-  public void onDeactivate() {
-    LOGGER.info("Bloodlust slowly disappears.");
-  }
-}
-```
-
-这里是两种层次结构的实践：
-
-```java
-var enchantedSword = new Sword(new SoulEatingEnchantment());
-enchantedSword.wield();
-enchantedSword.swing();
-enchantedSword.unwield();
-// The sword is wielded.
-// The item spreads bloodlust.
-// The sword is swinged.
-// The item eats the soul of enemies.
-// The sword is unwielded.
-// Bloodlust slowly disappears.
-
-var hammer = new Hammer(new FlyingEnchantment());
-hammer.wield();
-hammer.swing();
-hammer.unwield();
-// The hammer is wielded.
-// The item begins to glow faintly.
-// The hammer is swinged.
-// The item flies and strikes the enemies finally returning to owner's hand.
-// The hammer is unwielded.
-// The item's glow fades.
-```
-
-
-
-## 类图
-
-![alt text](../../bridge/etc/bridge.urm.png "Bridge class diagram")
-
-## 适用性
-
-使用桥接模式当
-
-* 你想永久性的避免抽象和他的实现之间的绑定。有可能是这种情况，当实现需要被选择或者在运行时切换。
-* 抽象和他们的实现应该能通过写子类来扩展。这种情况下，桥接模式让你可以组合不同的抽象和实现并独立的扩展他们。
-* 对抽象的实现的改动应当不会对客户产生影响；也就是说，他们的代码不必重新编译。
-* 你有种类繁多的类。这样的类层次结构表明需要将一个对象分为两部分。Rumbaugh 使用术语“嵌套归纳”来指代这种类层次结构。
-* 你想在多个对象间分享一种实现（可能使用引用计数），这个事实应该对客户隐藏。一个简单的示例是Coplien的String类，其中多个对象可以共享同一字符串表示形式
-
-## 教程
-
-* [Bridge Pattern Tutorial](https://www.journaldev.com/1491/bridge-design-pattern-java)
-
-## 鸣谢
-
-* [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)

zh/decorator/README.md

@@ -33,6 +33,8 @@ tags:
 
 以巨魔的为例。首先我有有一个简单的巨魔，实现了巨魔接口。
 
+程序mple. First of all we have a simple troll implementing the troll interface
+
 ```java
 public interface Troll {
   void attack();

zh/dependency-injection/README.md

@@ -1,101 +0,0 @@
----
-layout: pattern
-title: Dependency Injection
-folder: dependency-injection
-permalink: /patterns/dependency-injection/
-categories: Creational
-tags:
- - Decoupling
----
-
-## 目的
-
-依赖注入是一种软件设计模式，其中一个或多个依赖项（或服务）被注入或通过引用传递到一个依赖对象（或客户端）中，并成为客户端状态的一部分。该模式将客户的依赖关系的创建与其自身的行为分开，这使程序设计可以松散耦合，并遵循控制反转和单一职责原则。
-
-## 解释
-
-真实世界例子
-
-> 老巫师喜欢不时地装满烟斗抽烟。 但是，他不想只依赖一个烟草品牌，而是希望能够互换使用它们。 
-
-通俗的说
-
-> 依赖注入将客户端依赖的创建与其自身行为分开。
-
-维基百科说
-
-> 在软件工程中，依赖注入是一种对象接收其依赖的其他对象的技术。 这些其他对象称为依赖项。
-
-**程序示例**
-
-先介绍一下烟草接口和具体的品牌。
-
-```java
-public abstract class Tobacco {
-
-  private static final Logger LOGGER = LoggerFactory.getLogger(Tobacco.class);
-
-  public void smoke(Wizard wizard) {
-    LOGGER.info("{} smoking {}", wizard.getClass().getSimpleName(),
-        this.getClass().getSimpleName());
-  }
-}
-
-public class SecondBreakfastTobacco extends Tobacco {
-}
-
-public class RivendellTobacco extends Tobacco {
-}
-
-public class OldTobyTobacco extends Tobacco {
-}
-```
-
-下面是老巫师的类的层次结构。
-
-```java
-public interface Wizard {
-
-  void smoke();
-}
-
-public class AdvancedWizard implements Wizard {
-
-  private final Tobacco tobacco;
-
-  public AdvancedWizard(Tobacco tobacco) {
-    this.tobacco = tobacco;
-  }
-
-  @Override
-  public void smoke() {
-    tobacco.smoke(this);
-  }
-}
-```
-
-最后我们可以看到给老巫师任意品牌的烟草是多么的简单。
-
-```java
-    var advancedWizard = new AdvancedWizard(new SecondBreakfastTobacco());
-    advancedWizard.smoke();
-```
-
-## 类图
-
-![alt text](../../dependency-injection/etc/dependency-injection.png "Dependency Injection")
-
-## 适用性
-
-使用依赖注入当：
-
-- 当你需要从对象中移除掉具体的实现内容时
-
-* 使用模拟对象或存根隔离地启用类的单元测试
-
-## 鸣谢
-
-* [Dependency Injection Principles, Practices, and Patterns](https://www.amazon.com/gp/product/161729473X/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=javadesignpat-20&creative=9325&linkCode=as2&creativeASIN=161729473X&linkId=57079257a5c7d33755493802f3b884bd)
-* [Clean Code: A Handbook of Agile Software Craftsmanship](https://www.amazon.com/gp/product/0132350882/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0132350882&linkCode=as2&tag=javadesignpat-20&linkId=2c390d89cc9e61c01b9e7005c7842871)
-* [Java 9 Dependency Injection: Write loosely coupled code with Spring 5 and Guice](https://www.amazon.com/gp/product/1788296257/ref=as_li_tl?ie=UTF8&tag=javadesignpat-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=1788296257&linkId=4e9137a3bf722a8b5b156cce1eec0fc1)
-* [Google Guice Tutorial: Open source Java based dependency injection framework](https://www.amazon.com/gp/product/B083P7DZ8M/ref=as_li_tl?ie=UTF8&tag=javadesignpat-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B083P7DZ8M&linkId=04f0f902c877921e45215b624a124bfe)