chain of responsibility pattern

DesignPattern/ChainOfResponsibility/AddHandler.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal class AddHandler : CalcHandler
+    {
+        public override int Calculate(CalcType cType, int a, int b)
+        {
+            if (cType == CalcType.Add)
+                return a + b;
+            else
+                return Next.Calculate(cType, a, b);
+        }
+    }
+}

DesignPattern/ChainOfResponsibility/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8.1" />
+    </startup>
+</configuration>

DesignPattern/ChainOfResponsibility/CalcHandler.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal abstract class CalcHandler
+    {
+        public CalcHandler Next { get; set; }
+        public abstract int Calculate(CalcType cType, int a, int b);
+    }
+}

DesignPattern/ChainOfResponsibility/CalcType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal enum CalcType
+    {
+        Add,
+        Subtract,
+        Multiply,
+        Divide,
+    }
+}

DesignPattern/ChainOfResponsibility/ChainOfResponsibility.csproj

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>ChainOfResponsibility</RootNamespace>
+    <AssemblyName>ChainOfResponsibility</AssemblyName>
+    <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="AddHandler.cs" />
+    <Compile Include="CalcHandler.cs" />
+    <Compile Include="CalcType.cs" />
+    <Compile Include="Client.cs" />
+    <Compile Include="DivideHandler.cs" />
+    <Compile Include="MultiplyHandler.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SubtractHandler.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/ChainOfResponsibility/Client.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal class Client
+    {
+        public static void HowToUse()
+        {
+            CalcHandler add = new AddHandler();
+            CalcHandler sub = new SubtractHandler();
+            CalcHandler mul = new MultiplyHandler();
+            CalcHandler div = new DivideHandler();
+
+            add.Next = sub;
+            sub.Next = mul;
+            mul.Next = div;
+
+            int result = add.Calculate(CalcType.Multiply, 10, 20);
+            Console.WriteLine(result);
+        }
+    }
+}

DesignPattern/ChainOfResponsibility/DivideHandler.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal class DivideHandler : CalcHandler
+    {
+        public override int Calculate(CalcType cType, int a, int b)
+        {
+            if (cType == CalcType.Divide)
+                return a + b;
+            else
+                return Next.Calculate(cType, a, b);
+        }
+    }
+}

DesignPattern/ChainOfResponsibility/MultiplyHandler.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal class MultiplyHandler : CalcHandler
+    {
+        public override int Calculate(CalcType cType, int a, int b)
+        {
+            if (cType == CalcType.Multiply)
+                return a * b;
+            else
+                return Next.Calculate(cType, a, b);
+        }
+    }
+}

DesignPattern/ChainOfResponsibility/Program.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    /*
+     * 카테고리: 행위 패턴
+     * 개요: 명령을 처리하기 위해 명령을 체인을 따라 전달하며
+     * 그 명령을 수행할 수 있도록 체인으로 연결된 객체에서 처리함
+     * 각 체인의 객체는 명령을 수행해보고 처리할 수 없으면 다음 객체로 넘기며
+     * 명령은 체인의 처음부터 끝까지 계속 이동하게 됨
+     */
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Client.HowToUse();
+
+            Console.ReadKey();
+        }
+    }
+}

DesignPattern/ChainOfResponsibility/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("ChainOfResponsibility")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ChainOfResponsibility")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("808a59ea-ef38-4d24-b4c9-add93d21eddc")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

DesignPattern/ChainOfResponsibility/SubtractHandler.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility
+{
+    internal class SubtractHandler : CalcHandler
+    {
+        public override int Calculate(CalcType cType, int a, int b)
+        {
+            if (cType == CalcType.Subtract)
+                return a - b;
+            else
+                return Next.Calculate(cType, a, b);
+        }
+    }
+}

DesignPattern/DesignPattern.sln

@@ -33,6 +33,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Observer", "Observer\Observ
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Strategy", "Strategy\Strategy.csproj", "{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChainOfResponsibility", "ChainOfResponsibility\ChainOfResponsibility.csproj", "{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -99,6 +101,10 @@ Global
 		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{808A59EA-EF38-4D24-B4C9-ADD93D21EDDC}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE