职责链模式基本代码

XINCGer · XINCGer · commit 1c6c8e19a9be · 2017-09-04T20:54:46.000+08:00
diff --git a/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/ChainofResponsibilityPattern.csproj b/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/ChainofResponsibilityPattern.csproj
@@ -42,6 +42,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Handler.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
diff --git a/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/Handler.cs b/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/Handler.cs
@@ -0,0 +1,85 @@
+﻿using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainofResponsibilityPattern
+{
+    abstract class Handler
+    {
+        protected Handler successor;
+
+        /// <summary>
+        /// 设定被授权者
+        /// </summary>
+        /// <param name="handler"></param>
+        public void SetSuccesor(Handler handler)
+        {
+            this.successor = handler;
+        }
+
+        /// <summary>
+        /// 抽象的处理请求方法
+        /// </summary>
+        /// <param name="requset"></param>
+        public abstract void HandleRequest(int requset);
+    }
+
+    class ConcreteHandlerA : Handler
+    {
+        public override void HandleRequest(int requset)
+        {
+            if (1 == requset)
+            {
+                Console.WriteLine("ConcreteHandlerA处理了请求" + requset);
+            }
+            else
+            {
+                if (null != this.successor)
+                {
+                    Console.WriteLine("自身无法处理请求，转到下一个处理者");
+                    this.successor.HandleRequest(requset);
+                }
+            }
+        }
+    }
+
+    class ConcreteHandlerB : Handler
+    {
+        public override void HandleRequest(int requset)
+        {
+            if (2 == requset)
+            {
+                Console.WriteLine("ConcreteHandlerB处理了请求" + requset);
+            }
+            else
+            {
+                if (null != this.successor)
+                {
+                    Console.WriteLine("自身无法处理请求，转到下一个处理者");
+                    this.successor.HandleRequest(requset);
+                }
+            }
+        }
+    }
+
+    class ConcreteHandlerC : Handler
+    {
+        public override void HandleRequest(int requset)
+        {
+            if (3 == requset)
+            {
+                Console.WriteLine("ConcreteHandlerC处理了请求" + requset);
+            }
+            else
+            {
+                if (null != this.successor)
+                {
+                    Console.WriteLine("自身无法处理请求，转到下一个处理者");
+                    this.successor.HandleRequest(requset);
+                }
+            }
+        }
+    }
+}
diff --git a/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/Program.cs b/DesignPatterns/ChainofResponsibilityPattern/ChainofResponsibilityPattern/Program.cs
@@ -10,6 +10,18 @@ class Program
     {
         static void Main(string[] args)
         {
+
+            Handler ha = new ConcreteHandlerA();
+            Handler hb = new ConcreteHandlerB();
+            Handler hc = new ConcreteHandlerC();
+
+            ha.SetSuccesor(hb);
+            hb.SetSuccesor(hc);
+
+            for (int i = 1; i < 4; i++)
+            {
+                ha.HandleRequest(i);
+            }
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -10,6 +10,18 @@ class Program`
`10`	`10`	`{`
`11`	`11`	`static void Main(string[] args)`
`12`	`12`	`{`
	`13`	`+`
	`14`	`+ Handler ha = new ConcreteHandlerA();`
	`15`	`+ Handler hb = new ConcreteHandlerB();`
	`16`	`+ Handler hc = new ConcreteHandlerC();`
	`17`	`+`
	`18`	`+ ha.SetSuccesor(hb);`
	`19`	`+ hb.SetSuccesor(hc);`
	`20`	`+`
	`21`	`+ for (int i = 1; i < 4; i++)`
	`22`	`+ {`
	`23`	`+ ha.HandleRequest(i);`
	`24`	`+ }`
`13`	`25`	`}`
`14`	`26`	`}`
`15`	`27`	`}`