设计模式之中介者模式

package com.hml.mediator;

public interface Mediator {

    public void send(String message, Colleague colleague);
}

package com.hml.mediator;

public class ConcreateMediator implements Mediator {

    private Colleague colleague1;
    private Colleague colleague2;

    public Colleague getColleague1() {
        return colleague1;
    }

    public void setColleague1(Colleague colleague1) {
        this.colleague1 = colleague1;
    }

    public Colleague getColleague2() {
        return colleague2;
    }

    public void setColleague2(Colleague colleague2) {
        this.colleague2 = colleague2;
    }

    public void send(String message, Colleague colleague) {
        if (colleague == colleague1) {
            colleague2.notifyMessage(message);
        }else {
            colleague1.notifyMessage(message);
        }
    }

}

package com.hml.mediator;

public abstract class Colleague {

    private Mediator mediator;

    public Mediator getMediator() {
        return mediator;
    }

    public void setMediator(Mediator mediator) {
        this.mediator = mediator;
    }

    public abstract void notifyMessage(String message);
    
    public abstract void sendMessage(String messege);

}

package com.hml.mediator;

public class ConcreateColleague1 extends Colleague {

    @Override
    public void notifyMessage(String message) {
        System.out.println("ConcreateColleague1:" + message);
    }

    @Override
    public void sendMessage(String messege) {
        getMediator().send(messege, this);
    }


}

package com.hml.mediator;

public class ConcreateColleague2 extends Colleague {

    @Override
    public void notifyMessage(String message) {
        System.out.println("ConcreateColleague2:" + message);
    }

    @Override
    public void sendMessage(String messege) {
        getMediator().send(messege, this);
    }


}

package com.hml.mediator;

public class Test {
    public static void main(String[] args) {
        ConcreateMediator mediator = new ConcreateMediator();
       Colleague colleague1 = new ConcreateColleague1();
       colleague1.setMediator(mediator); // 同事认识中介
       Colleague colleague2 = new ConcreateColleague2();
       colleague2.setMediator(mediator); // 同事认识中介
       mediator.setColleague1(colleague1); // 中介认识同事
       mediator.setColleague2(colleague2); // 中介认识同事
       
       colleague1.sendMessage("你吃饭了吗？"); // 通信
       colleague2.sendMessage("没有，你请客吗？"); // 通信
    }
}