facade pattern

DesignPattern/DesignPattern.sln

@@ -21,6 +21,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Composite", "Composite\Comp
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Decorator", "Decorator\Decorator.csproj", "{4BDF9142-7984-485F-AA62-77B7B7359966}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Facade", "Facade\Facade.csproj", "{968D6295-75C3-46FF-AAB9-1579DB405B31}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -63,6 +65,10 @@ Global
 		{4BDF9142-7984-485F-AA62-77B7B7359966}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4BDF9142-7984-485F-AA62-77B7B7359966}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4BDF9142-7984-485F-AA62-77B7B7359966}.Release|Any CPU.Build.0 = Release|Any CPU
+		{968D6295-75C3-46FF-AAB9-1579DB405B31}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{968D6295-75C3-46FF-AAB9-1579DB405B31}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{968D6295-75C3-46FF-AAB9-1579DB405B31}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{968D6295-75C3-46FF-AAB9-1579DB405B31}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

DesignPattern/Facade/App.config

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

DesignPattern/Facade/Client.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Facade
+{
+	class Client
+	{
+		public static void HowToUse()
+		{
+			GC.Collect();
+
+			byte[] data = Facade.PrintPicture(102802);
+
+			Form form = new Form();
+			form.BackgroundImageLayout = ImageLayout.Stretch;
+			form.BackgroundImage = GenerateBitmapImage(data);
+			form.ShowDialog();
+		}
+
+		private static Bitmap GenerateBitmapImage(byte[] data)
+		{
+			int size = (int)Math.Sqrt(data.Length);
+
+			Bitmap bitmap = new Bitmap(size, size, PixelFormat.Format8bppIndexed);
+			BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
+
+			try
+			{
+				for (int rowIdx = 0; rowIdx < bitmapData.Height; ++rowIdx)
+				{
+					Marshal.Copy(data, rowIdx * bitmap.Width, bitmapData.Scan0 + rowIdx * bitmapData.Stride, bitmap.Width);
+				}
+			}
+			finally
+			{
+				bitmap.UnlockBits(bitmapData);
+			}
+
+			return bitmap;
+		}
+	}
+}

DesignPattern/Facade/Facade.cs

@@ -0,0 +1,24 @@
+using Facade.Subsystems;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Facade
+{
+	class Facade
+	{
+		public static byte[] PrintPicture(int employeeId)
+		{
+			HRSystem hr = new HRSystem();
+			int picId = hr.GetPictureId(employeeId);
+
+			PictureSystem pic = new PictureSystem();
+			byte[] picData = pic.GetPicture(picId);
+
+			PrintSystem prt = new PrintSystem();
+			return prt.Print(picData);
+		}
+	}
+}

DesignPattern/Facade/Facade.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>{968D6295-75C3-46FF-AAB9-1579DB405B31}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Facade</RootNamespace>
+    <AssemblyName>Facade</AssemblyName>
+    <TargetFrameworkVersion>v4.8</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.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <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="Client.cs" />
+    <Compile Include="Facade.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Subsystems\HRSystem.cs" />
+    <Compile Include="Subsystems\PictureSystem.cs" />
+    <Compile Include="Subsystems\PrintSystem.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/Facade/Program.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Facade
+{
+	/*
+	 * 카테고리: 구조 패턴
+	 * 개요: 복잡하고 커다란 서브시스템을 간단한 인터페이스를 통해 사용이 쉽도록 함
+	 * 클라이언트는 패턴을 통해 전면의 단순 인터페이스만 사용하므로,
+	 * 서브시스템 라이브러리 사용의 가독성, 사용도를 높임
+	 * 
+	 * 참고: Adapter 패턴과 유사하지만,
+	 * Adapter는 클라이언트가 필요로 하는 다른 인터페이스로 변환하는 것이고
+	 * Facade는 서브시스템을 쉽게 사용할 수 있는 간단한 인터페이스를 제공하는 것임
+	 */
+	class Program
+	{
+		static void Main(string[] args)
+		{
+			Client.HowToUse();
+
+			Console.ReadKey();
+		}
+	}
+}

DesignPattern/Facade/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("Facade")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Facade")]
+[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("968d6295-75c3-46ff-aab9-1579db405b31")]
+
+// 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/Facade/Subsystems/HRSystem.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Facade.Subsystems
+{
+	class HRSystem
+	{
+		public int GetPictureId(int empId)
+		{
+			return empId;
+		}
+	}
+}

DesignPattern/Facade/Subsystems/PictureSystem.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Facade.Subsystems
+{
+	class PictureSystem
+	{
+		Random rand = new Random();
+
+		public byte[] GetPicture(int id)
+		{
+			byte[] data = new byte[id];
+			rand.NextBytes(data);
+
+			return data;
+		}
+	}
+}

DesignPattern/Facade/Subsystems/PrintSystem.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Facade.Subsystems
+{
+	class PrintSystem
+	{
+		public byte[] Print(byte[] data)
+		{
+			Console.WriteLine(String.Concat(data.Select(b => string.Format("[{0}]", b.ToString("X2")))));
+			
+
+			return data;
+		}
+	}
+}