行为型模式-中介者mediator

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一般用于一组对象以定义良好但是复杂的方式进行通信的场合
using System;using System.Collections.Generic;using System.Text;namespace 中介者模式{    class Program    {        static void Main(string[] args)        {            UnitedNationsSecurityCouncil UNSC = new UnitedNationsSecurityCouncil();            USA c1 = new USA(UNSC);            Iraq c2 = new Iraq(UNSC);            UNSC.Colleague1 = c1;            UNSC.Colleague2 = c2;            c1.Declare("不准研制核武器，否则要发动战争！");            c2.Declare("我们没有核武器，也不怕侵略。");            Console.Read();        }    }    //联合国机构    abstract class UnitedNations    {        /// <summary>        /// 声明        /// </summary>        /// <param name="message">声明信息</param>        /// <param name="colleague">声明国家</param>        public abstract void Declare(string message, Country colleague);    }    //联合国安全理事会    class UnitedNationsSecurityCouncil : UnitedNations    {        private USA colleague1;        private Iraq colleague2;        public USA Colleague1        {            set { colleague1 = value; }        }        public Iraq Colleague2        {            set { colleague2 = value; }        }        public override void Declare(string message, Country colleague)        {            if (colleague == colleague1)            {                colleague2.GetMessage(message);            }            else            {                colleague1.GetMessage(message);            }        }    }    //国家    abstract class Country    {        protected UnitedNations mediator;        public Country(UnitedNations mediator)        {            this.mediator = mediator;        }    }    //美国    class USA : Country    {        public USA(UnitedNations mediator)            : base(mediator)        {        }        //声明        public void Declare(string message)        {            mediator.Declare(message, this);        }        //获得消息        public void GetMessage(string message)        {            Console.WriteLine("美国获得对方信息：" + message);        }    }    //伊拉克    class Iraq : Country    {        public Iraq(UnitedNations mediator)            : base(mediator)        {        }        //声明        public void Declare(string message)        {            mediator.Declare(message, this);        }        //获得消息        public void GetMessage(string message)        {            Console.WriteLine("伊拉克获得对方信息：" + message);        }    }}
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