C#设计模式之ChainOfResponsibility职责链模式解决真假美猴王问题实例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  /// 

  /// 真 美猴王
  /// 
  public enum TheRealMonkeyKing {
    SunWukong=1,//孙悟空
    SixEarMacaque=2//六耳猕猴
  }
  public interface IHandler
  {
    /// 

    /// 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque);
    /// 

    /// 指定下一个神仙来判断真假美猴王
    /// 
    IHandler NextHandler{get;set;}
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  public class GuangYinBodhisattva:IHandler
  {
    /// 

    /// 观音菩萨 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    public TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque){
      Console.WriteLine("观音菩萨暗念《紧箍儿咒》，两个一齐喊疼，菩萨无计奈何,突然想起李天王的照妖镜，对，交给他去辨别");
      return NextHandler.Handler(SunWukong,SixEarMacaque);
    }
    /// 

    /// 指定下一路神仙 来判断真假美猴王
    /// 
    public IHandler NextHandler { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  public class LiTianWang : IHandler
  {
    /// 

    /// 李天王 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    public TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque)
    {
      Console.WriteLine("李天王取照妖镜照住，镜中乃是两个孙悟空，毫发不差。玉帝亦辨不出，两悟空大战几百回合，来到了唐僧那里");
      return NextHandler.Handler(SunWukong, SixEarMacaque);
    }
    /// 

    /// 指定下一路神仙 来判断真假美猴王
    /// 
    public IHandler NextHandler { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  public class TangSeng : IHandler
  {
    /// 

    /// 唐僧 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    public TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque)
    {
      Console.WriteLine(" 唐僧念《紧箍儿咒》，二人一齐叫苦, 唐僧也不认得真假，两悟空打到阎罗殿，谛听出来辨别");
      return NextHandler.Handler(SunWukong, SixEarMacaque);
    }
    /// 

    /// 指定下一路神仙 来判断真假美猴王
    /// 
    public IHandler NextHandler { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  public class YanLuoDianDiTing : IHandler
  {
    /// 

    /// 阎罗殿的谛听 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    public TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque)
    {
      Console.WriteLine("阎罗殿的谛听可以分辨的出真假, 却不敢说出来，因为六耳猕猴的后台很强：如来是也");
      return NextHandler.Handler(SunWukong, SixEarMacaque);
    }
    /// 

    /// 指定下一路神仙 来判断真假美猴王
    /// 
    public IHandler NextHandler { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  public class RuLai : IHandler
  {
    /// 

    /// 唐僧 判断真假美猴王
    /// 
    /// 孙悟空
    /// 六耳猕猴
    /// 
    public TheRealMonkeyKing Handler(string SunWukong, string SixEarMacaque)
    {
      Console.WriteLine(" 如来佛辨出真假，是所有神仙都没有听说过的新物种：六耳猕猴");
      //返回孙悟空，没有NextHandler了
      return TheRealMonkeyKing.SunWukong;
      //还有人说应该返回TheRealMonkeyKing.SixEarMacaque，
      //因为六耳猕猴是如来佛的徒弟，用来除掉孙悟空，和菩提祖师斗智斗勇。这里打死的是真孙悟空。
      //另有一说六耳猕猴是孙悟空心魔，用佛洛伊德心理学分析，孙悟空也有反抗的一面，其实还是一个孙悟空。
      //还有一说是 六耳猕猴是真正的六耳猕猴，孙悟空也是真的孙悟空，
      //因为孙悟空打死的是 六耳猕猴的本相，六耳猕猴没必要变个猴子给人打死。
      //争议性还是蛮多。《西游记》还真是神作。
    }
    /// 

    /// 指定下一路神仙 来判断真假美猴王
    /// 
    public IHandler NextHandler { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.ChainOfResponsibility
{
  /// 

  /// 判断真假美猴王入口
  /// 
  public class JudgementTheKingOfMonkey
  {
    //各路神仙都请来，放一起
    public IHandler GuangYinBodhisattva { get; set; }
    public IHandler LiTianWang { get; set; }
    public IHandler TangSeng { get; set; }
    public IHandler YanLuoDianDiTing { get; set; }
    public IHandler RuLai { get; set; }
    /// 

    /// 判断真假美猴王，首先从观音菩萨开始
    /// 
    /// 
    public TheRealMonkeyKing Judge(string SunWuKong,string SixEarMacaque) {
     return GuangYinBodhisattva.Handler(SunWuKong, SixEarMacaque);
    }
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Com.Design.Gof.Observer;
using Com.Design.Gof.ChainOfResponsibility;
namespace Com.Design.Gof.Test
{
  class Program
  {
    static void Main(string[] args)
    {
      #region ChainOfResponsibility
      //判断真假孙悟空，首先把各路神仙都new一下，让他们先喝茶休息
      JudgementTheKingOfMonkey judgement = new JudgementTheKingOfMonkey
      {
        GuangYinBodhisattva = new GuangYinBodhisattva(),//观音菩萨
        LiTianWang = new LiTianWang(),//托塔李天王
        TangSeng = new TangSeng(),//唐僧
        YanLuoDianDiTing = new YanLuoDianDiTing(),//阎罗殿谛听
        RuLai = new RuLai()//如来佛祖
      };
      //把各路神仙的责任划分一下，各自指定下一个神仙是谁
      //观音菩萨-->托塔李天王-->唐僧-->阎罗殿谛听-->如来佛祖
      judgement.GuangYinBodhisattva.NextHandler = judgement.LiTianWang;
      judgement.LiTianWang.NextHandler = judgement.TangSeng;
      judgement.TangSeng.NextHandler = judgement.YanLuoDianDiTing;
      judgement.YanLuoDianDiTing.NextHandler = judgement.RuLai;
      //两美猴王入场
      string SunWuKong = "SunWuKong", SixEarMacaque = "SixEarMacaque";
      //开始判断真假美猴王
      TheRealMonkeyKing RealMonkeyKing = judgement.Judge(SunWuKong, SixEarMacaque);
      Console.WriteLine();
      Console.WriteLine("Then,真正的美猴王是：" + RealMonkeyKing + "孙悟空");
      #endregion
      Console.ReadKey();
    }
  }
}