设计模式深入学习--Mediator 中介者模式(行为型模式)

   今天我们来介绍下Mediator 中介者模式。Interpreter 解释器模式是一种我们游戏设计中大量会用到的设计模式，中介者模定义了一个中介对象来封装一系列对象之间的交互关系。中介者使各个对象之间不需要显式地相互引用，从而使耦合性降低，而且可以独立地改变它们之间的交互行为。我们先来看基本代码来了解下实现的原理。

/// <summary>
/// Mediator类，抽象中介者类
/// </summary>
abstract class Mediator
{public abstract void Send(string message, Colleague colleague);
}/// <summary>
/// Colleague类 抽象同事类
/// </summary>
abstract class Colleague
{protected Mediator mediator;public Colleague(Mediator mediator){this.mediator = mediator;}
}/// <summary>
/// 实体中介者类
/// </summary>
class ConcreteMediator : Mediator
{private ConcreteColleague1 colleague1;private ConcreteColleague2 colleague2;public ConcreteColleague1 Colleague1{set { colleague1 = value; }}public ConcreteColleague2 Colleague2{set { colleague2 = value; }}public override void Send(string message, Colleague colleague){if (colleague == colleague1){colleague2.Notify(message);}else{colleague1.Notify(message);}}
}/// <summary>
/// 实体同事类1
/// </summary>
class ConcreteColleague1 : Colleague
{public ConcreteColleague1(Mediator mediator) : base(mediator){}public void Send(string message){mediator.Send(message,this);}public void Notify(string message){Console.WriteLine("同事1得到信息:"+message);}
}/// <summary>
/// 实体同事类2
/// </summary>
class ConcreteColleague2 : Colleague
{public ConcreteColleague2(Mediator mediator) : base(mediator){}public void Send(string message){mediator.Send(message, this);}public void Notify(string message){Console.WriteLine("同事2得到信息:" + message);}
}

{ConcreteMediator m=new ConcreteMediator();ConcreteColleague1 c1=new ConcreteColleague1(m);ConcreteColleague2 c2=new ConcreteColleague2(m);m.Colleague1 = c1;m.Colleague2 = c2;c1.Send("土豆土豆，我是地瓜");c2.Send("土豆收到，地瓜请讲");Console.ReadKey();

abstract class Manager
{public abstract void Notify(string message, Module colleague);
}abstract class Module
{protected Manager mediator;public Module(Manager mediator){this.mediator = mediator;}
}//Model 模型数据层
class ModelModule:Module
{public ModelModule(Manager mediator) : base(mediator){}//通知public void Notify(string message){mediator.Notify(message,this);}//获得消息public void GetMessage(string message){Console.WriteLine("Model层收到消息:"+message);}
}//View 视图数据层
class ViewModule : Module
{public ViewModule(Manager mediator) : base(mediator){}//通知public void Notify(string message){mediator.Notify(message, this);}//获得消息public void GetMessage(string message){Console.WriteLine("View层收到消息:" + message);}
}//Controller 视图数据层
class ControllerModule : Module
{public ControllerModule(Manager mediator) : base(mediator){}//通知public void Notify(string message){mediator.Notify(message, this);}//获得消息public void GetMessage(string message){Console.WriteLine("Controller层收到消息:" + message);}
}class MVCManager : Manager
{public  ModelModule m;public ViewModule v;public ControllerModule c;public override void Notify(string message, Module colleague){if (colleague == c){m.GetMessage(message);v.GetMessage(message);}}
}

//声明中介对象MVCManager mvc=new MVCManager();//声明三个同事类，把中介类传入ModelModule model=new ModelModule(mvc);ViewModule view=new ViewModule(mvc);ControllerModule controller=new ControllerModule(mvc);//中介类绑定操作对象mvc.m = model;mvc.c = controller;mvc.v = view;controller.Notify("Conrtroller发送了消息");Console.ReadKey();