AdapterFromUsersRepositoryToMySQLUserRepository.java

package com.design.patterns.factory.Adapter;

/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public class AdapterFromUsersRepositoryToMySQLUserRepository implements  UsersRepository { // implements used interface by client !

    //compose the adaptee class/interface
    private MySQLUserRepository mySQLUserRepository;

    //constructor ...

    @Override
    public void save(AnotherUserType anotherUserType) {
        //Adapt any object that needs adaptation ...
        User user  = new User();
        user.setName(anotherUserType.getName());
       mySQLUserRepository.save(user);
    }
}

AnotherUserType.java

package com.design.patterns.factory.Adapter;

/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public class AnotherUserType {

    private int id;
    private String username;
    private String name;

    public AnotherUserType(int id, String username, String name) {
        this.id = id;
        this.username = username;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public String getUsername() {
        return username;
    }

    public String getName() {
        return name;
    }
    //setters and getters.

}

Client.java

package com.design.patterns.factory.Adapter;

/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public class Client {
    private UsersRepository usersRepository;

    public void createNew(AnotherUserType anotherUserType){
        //validate anotherUserType
        // send some emails ...
        // do any business logic
        //then ...
        usersRepository.save(anotherUserType);
    }
}

MySQLUserRepository.java

package com.design.patterns.factory.Adapter;
/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public class MySQLUserRepository {  // Adaptee interface

    //Uses JDBC to save the user in MySQL ...
    public void save(User user) {
        //save in some J
    }

    public User getById(String id){
        //return a user from MySQL using JDBC ...
        return new User();
    }
}

User.java

package com.design.patterns.factory.Adapter;

/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public class User {
    private int age;
    private String name;
    //constructor, getters, and setters !

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

UsersRepository.java

package com.design.patterns.factory.Adapter;
/**
 * Created by Adelin_Ghanayem on 05-Jul-17.
 */
public interface UsersRepository {
    void save(AnotherUserType anotherUserType);
}