C#设计模式之十七中介者模式（Mediator Pattern）【行为型】

  1 namespace 中介者模式的实现
  2 {
  3     //抽象中介者角色
  4     public interface Mediator
  5     {
  6         void Command(Department department);
  7     }
  8 
  9     //总经理--相当于具体中介者角色
 10     public sealed class President : Mediator
 11     {
 12         //总经理有各个部门的管理权限
 13         private Financial _financial;
 14         private Market _market;
 15         private Development _development;
 16 
 17         public void SetFinancial(Financial financial)
 18         {
 19             this._financial = financial;
 20         }
 21         public void SetDevelopment(Development development)
 22         {
 23             this._development = development;
 24         }
 25         public void SetMarket(Market market)
 26         {
 27             this._market = market;
 28         }
 29 
 30         public void Command(Department department)
 31         {
 32             if (department.GetType() == typeof(Market))
 33             {
 34                 _financial.Process();
 35             }
 36         }
 37     }
 38 
 39     //同事类的接口
 40     public abstract class Department
 41     {
 42         //持有中介者(总经理)的引用
 43         private Mediator mediator;
 44 
 45         protected Department(Mediator mediator)
 46         {
 47             this.mediator = mediator;
 48         }
 49 
 50         public Mediator GetMediator
 51         {
 52             get { return mediator; }
 53             private set { this.mediator = value; }
 54         }
 55 
 56         //做本部门的事情
 57         public abstract void Process();
 58 
 59         //向总经理发出申请
 60         public abstract void Apply();
 61     }
 62 
 63     //开发部门
 64     public sealed class Development : Department
 65     {
 66         public Development(Mediator m) : base(m) { }
 67 
 68         public override void Process()
 69         {
 70             Console.WriteLine("我们是开发部门，要进行项目开发，没钱了，需要资金支持！");
 71         }
 72 
 73         public override void Apply()
 74         {
 75             Console.WriteLine("专心科研，开发项目！");
 76         }
 77     }
 78 
 79     //财务部门
 80     public sealed class Financial : Department
 81     {
 82         public Financial(Mediator m) : base(m) { }
 83 
 84         public override void Process()
 85         {
 86             Console.WriteLine("汇报工作！没钱了，钱太多了！怎么花?");
 87         }
 88 
 89         public override void Apply()
 90         {
 91             Console.WriteLine("数钱！");
 92         }
 93     }
 94 
 95     //市场部门
 96     public sealed class Market : Department
 97     {
 98         public Market(Mediator mediator) : base(mediator) { }
 99 
100         public override void Process()
101         {
102             Console.WriteLine("汇报工作！项目承接的进度，需要资金支持！");
103             GetMediator.Command(this);
104         }
105 
106         public override void Apply()
107         {
108             Console.WriteLine("跑去接项目！");
109         }
110     }
111 
112 
113     class Program
114     {
115         static void Main(String[] args)
116         {
117             President mediator = new President();
118             Market market = new Market(mediator);
119             Development development = new Development(mediator);
120             Financial financial = new Financial(mediator);
121 
122             mediator.SetFinancial(financial);
123             mediator.SetDevelopment(development);
124             mediator.SetMarket(market);
125 
126             market.Process();
127             market.Apply();
128 
129             Console.Read();
130         }
131     }
132 }