设计模式--5.3 代理模式-强制代理

1 .强制代理
　　(1)强制代理是调用者直接调用真实角色，而不用关心代理类是否存在。其代理的产生是由真实角色决定的。
　　(2) 通过真实角色，查找代理角色；再通过代理角色，调真实角色的方法

2.代码

（1）抽象类，多了一个getProxy方法

package com.design.代理模式.强制代理;

public interface IGamePlayer {
    
    void login(String username , String pwd);
    
    void killBoss();
    
    void upgrade();
    
    IGamePlayer getProxy();
}

（2）真实角色

package com.design.代理模式.强制代理;

public class GamePlayer implements IGamePlayer {
    private String name = "";
    
    private IGamePlayer proxy = null;
    
    
    
    public GamePlayer(String name) {
        super();
        this.name = name;
    }

    @Override
    public IGamePlayer getProxy(){
        this.proxy = new GamePlayerProxy(this);
        return this.proxy;
    }

    @Override
    public void login(String username, String pwd) {
        if(this.isProxy()){
            System.out.println("name:" + name +" login....");
        }else{
            System.out.println("请使用代理");
        }
    }

    @Override
    public void killBoss() {
        if(this.isProxy()){
            System.out.println("name:" + name +" killBoss....");
        }else{
            System.out.println("请使用代理");
        }
    }

    @Override
    public void upgrade() {
        if(this.isProxy()){
            System.out.println("name:" + name +" upgrade....");
        }else{
            System.out.println("请使用代理");
        }
    }

     
    private boolean isProxy(){
        if(this.proxy == null){
            return false;
        }else{
            return true;
        }
    }
}

（3）代理类

package com.design.代理模式.强制代理;

import java.util.Date;

public class GamePlayerProxy implements IGamePlayer {
    private IGamePlayer gamePlayer = null;
    
    public GamePlayerProxy(IGamePlayer gamePlayer) {
        super();
        this.gamePlayer = gamePlayer;
    }

    @Override
    public void login(String username, String pwd) {
        System.out.println(username+"开始登录");
        this.gamePlayer.login(username, pwd);
        System.out.println(username+"登录完成");
    }

    @Override
    public void killBoss() {
        System.out.println("开始打怪" + new Date());
        this.gamePlayer.killBoss();
        Thread.currentThread();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("打怪结束" + new Date());
    }

    @Override
    public void upgrade() {
        this.gamePlayer.upgrade();
        System.out.println("恭喜升级完成");
    }

    @Override
    public IGamePlayer getProxy() {
        return this;
    }

}

（4）场景类

package com.design.代理模式.强制代理;

public class Client {
    public static void main(String[] args) {
        // 1.不使用代理，看结果，只能打印请使用代理
        IGamePlayer gp1 = new GamePlayer("lvyf");
        gp1.login("lvyf", "123");
        gp1.killBoss();
        gp1.upgrade();
        
        // 2.使用代理类,还是不行
        IGamePlayer gp2 = new GamePlayer("lvyf");
        IGamePlayer gp3 = new GamePlayerProxy(gp2);
        gp3.login("lvyf", "123");
        gp3.killBoss();
        gp3.upgrade();
        
        // 3. 通过真实角色，查找代理角色；再通过代理角色，调真实角色的方法
        IGamePlayer gp4 = new GamePlayer("lvyf");
        IGamePlayer proxy = gp4.getProxy();
        proxy.login("lvyf", "123");
        proxy.killBoss();
        proxy.upgrade();
    }
}