gaspersic/java-design-patterns
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

#107 Dao example JavaDoc

Browse Source
This commit is contained in:
Ilkka Seppala
2015-08-18 22:08:18 +03:00
parent a7d25e0485
commit 3526d96e37
5 changed files with 89 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
dao/src/main/java/com/iluwatar/dao/App.java
View File

@@ -1,47 +1,56 @@
package com.iluwatar.dao;
import java.util.ArrayList;
import java.util.List;
/**
*
* With the DAO pattern, we can use various method calls to retrieve/add/delete/update data without directly
* interacting with the data. The below example demonstrates basic operations(CRUD): select, add, update, and delete.
*/
public class App {
public static void main(String[] args) {
CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
System.out.println("customerDao.getCusterById(2): " + customerDao.getCusterById(2));
Customer customer = new Customer(4, "Dan", "Danson");
customerDao.addCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customer.setFirstName("Daniel");
customer.setLastName("Danielson");
customerDao.updateCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customerDao.deleteCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
}
public static List<Customer> generateSampleCustomers() {
Customer customer1 = new Customer(1, "Adam", "Adamson");
Customer customer2 = new Customer(2, "Bob", "Bobson");
Customer customer3 = new Customer(3, "Carl", "Carlson");
List<Customer> customers = new ArrayList<Customer>();
customers.add(customer1);
customers.add(customer2);
customers.add(customer3);
return customers;
}
}
package com.iluwatar.dao;
import java.util.ArrayList;
import java.util.List;
/**
*
* With the DAO pattern, we can use various method calls to retrieve/add/delete/update data without directly
* interacting with the data. The below example demonstrates basic operations(CRUD): select, add, update, and delete.
*
*/
public class App {
/**
* Program entry point
* @param args command line args
*/
public static void main(String[] args) {
CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
System.out.println("customerDao.getCusterById(2): " + customerDao.getCusterById(2));
Customer customer = new Customer(4, "Dan", "Danson");
customerDao.addCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customer.setFirstName("Daniel");
customer.setLastName("Danielson");
customerDao.updateCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customerDao.deleteCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
}
/**
* Generate customers
* @return list of customers
*/
public static List<Customer> generateSampleCustomers() {
Customer customer1 = new Customer(1, "Adam", "Adamson");
Customer customer2 = new Customer(2, "Bob", "Bobson");
Customer customer3 = new Customer(3, "Carl", "Carlson");
List<Customer> customers = new ArrayList<Customer>();
customers.add(customer1);
customers.add(customer2);
customers.add(customer3);
return customers;
}
}

6
dao/src/main/java/com/iluwatar/dao/Customer.java
View File

@@ -1,6 +1,12 @@
package com.iluwatar.dao;
/**
*
* Customer
*
*/
public class Customer {
private int id;
private String firstName;
private String lastName;

6
dao/src/main/java/com/iluwatar/dao/CustomerDao.java
View File

@@ -2,7 +2,13 @@ package com.iluwatar.dao;
import java.util.List;
/**
*
* CustomerDao
*
*/
public interface CustomerDao {
public List<Customer> getAllCustomers();
public Customer getCusterById(int id);
public void addCustomer(Customer customer);

2
dao/src/main/java/com/iluwatar/dao/CustomerDaoImpl.java
View File

@@ -3,11 +3,13 @@ package com.iluwatar.dao;
import java.util.List;
/**
*
* The data access object (DAO) is an object that provides an abstract interface to some type of database or other persistence mechanism.
* By mapping application calls to the persistence layer, DAO provide some specific data operations without exposing details of the database.
* This isolation supports the Single responsibility principle. It separates what data accesses the application needs, in terms of
* domain-specific objects and data types (the public interface of the DAO), from how these needs can be satisfied with a specific DBMS,
* database schema, etc.
*
*/
public class CustomerDaoImpl implements CustomerDao {