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Commit 87b9b78

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tk-codestk-codes
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Add code example to Facade pattern
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‎Diagrams/Facade.png

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‎README.md

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+2-2Lines changed: 2 additions & 2 deletions
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@@ -4,7 +4,7 @@ Design Patterns in C# / .NET
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[![Build Status](https://travis-ci.org/tk-codes/DesignPatterns.NET.svg?branch=master)](https://travis-ci.org/tk-codes/DesignPatterns.NET)
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![Language C#](https://img.shields.io/badge/language-c%23-blue.svg)
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![status in progress](https://img.shields.io/badge/status-in%20progress-brightgreen.svg)
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![number of patterns](https://img.shields.io/badge/patterns-16-red.svg)
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![number of patterns](https://img.shields.io/badge/patterns-17-red.svg)
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## Creational Patterns
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| :heavy_check_mark: | [Bridge](/StructuralPatterns/Bridge) |
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| :heavy_check_mark: | [Composite](/StructuralPatterns/Composite) |
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| :heavy_check_mark: | [Decorator](/StructuralPatterns/Decorator) |
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| | [Facade](/StructuralPatterns/Facade) |
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| :heavy_check_mark: | [Facade](/StructuralPatterns/Facade) |
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| | [Flyweight](/StructuralPatterns/Flyweight) |
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| | [Proxy](/StructuralPatterns/Proxy) |
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‎StructuralPatterns/Facade/Checker.cs

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using System;
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namespace StructuralPatterns.Facade;
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public class Checker
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{
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private readonly ProgramNode _program;
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public Checker(ProgramNode program)
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{
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_program = program;
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}
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public bool Check()
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{
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Console.WriteLine("Checker: Run semantic checks");
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return true;
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}
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}

‎StructuralPatterns/Facade/Compiler.cs

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using System;
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namespace StructuralPatterns.Facade;
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// Facade
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public class Compiler
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{
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public void Compile(string sourceCodePath, string targetPath)
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{
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Console.WriteLine($"Compiler: Starting to compile source code from {sourceCodePath}");
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// Subsystem 1
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var lexer = new Lexer(sourceCodePath);
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// Subsystem 2
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var parser = new Parser(lexer);
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var program = parser.Parse();
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// Subsystem 3
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var checker = new Checker(program);
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var isSemanticallyCorrect = checker.Check();
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// Subsystem 4
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if (isSemanticallyCorrect)
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{
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var generator = new Generator(program);
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generator.Generate(targetPath);
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}
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else
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{
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Console.WriteLine("Source code has errors");
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}
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}
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}

‎StructuralPatterns/Facade/Generator.cs

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using System;
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namespace StructuralPatterns.Facade;
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public class Generator
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{
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private readonly ProgramNode _program;
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public Generator(ProgramNode program)
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{
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_program = program;
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}
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public void Generate(string targetPath)
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{
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Console.WriteLine($"Generator: Generate IL code at {targetPath}");
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}
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}

‎StructuralPatterns/Facade/Lexer.cs

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using System;
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namespace StructuralPatterns.Facade;
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public class Lexer
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{
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private readonly string _sourceCodePath;
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public Lexer(string sourceCodePath)
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{
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_sourceCodePath = sourceCodePath;
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}
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public Token ReadToken()
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{
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Console.WriteLine("Lexer: Scanning token from source code");
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return new Token();
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}
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}
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public class Token{}

‎StructuralPatterns/Facade/Parser.cs

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using System;
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namespace StructuralPatterns.Facade;
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public class Parser
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{
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private readonly Lexer _lexer;
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public Parser(Lexer lexer)
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{
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_lexer = lexer;
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}
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public ProgramNode Parse()
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{
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var token = _lexer.ReadToken();
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Console.WriteLine("Parser: Parsing the token");
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return new ProgramNode();
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}
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}
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public class ProgramNode
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{
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}

‎StructuralPatterns/Facade/README.md

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@@ -43,7 +43,15 @@ Define a `Facade` object that
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## Example
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TODO
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![Facade](../../Diagrams/Facade.png)
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**Usage**
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```csharp
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// Client uses facade which hides the interaction with the sub-processes
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var compiler = new Compiler();
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compiler.Compile(@"~\hello.cs", @"~\hello.il");
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```
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## Relations with Other Patterns
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‎StructuralPatterns/Facade/TestFacade.cs

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namespace StructuralPatterns.Facade;
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public class TestFacade
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{
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public static void Run()
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{
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// Client uses facade which abstracts the interaction with the sub-processes
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var compiler = new Compiler();
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compiler.Compile(@"~\hello.cs", @"~\hello.il");
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}
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}

‎StructuralPatterns/Program.cs

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{
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static void Main()
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{
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Bridge.TestBridge.Run();
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Facade.TestFacade.Run();
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Console.ReadKey();
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}
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}

‎StructuralPatterns/doc/Facade.cd

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<?xml version="1.0" encoding="utf-8"?>
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<ClassDiagram MajorVersion="1" MinorVersion="1">
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<Class Name="StructuralPatterns.Facade.Checker">
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<Position X="12" Y="5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>AAAAAAgAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAAAAAAA=</HashCode>
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<FileName>Facade\Checker.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Class Name="StructuralPatterns.Facade.Compiler">
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<Position X="11" Y="2.5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEA=</HashCode>
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<FileName>Facade\Compiler.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Class Name="StructuralPatterns.Facade.Generator">
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<Position X="14" Y="5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>AAAAAAAAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAEAAAAA=</HashCode>
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<FileName>Facade\Generator.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Class Name="StructuralPatterns.Facade.Lexer">
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<Position X="8" Y="5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>ACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAA=</HashCode>
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<FileName>Facade\Lexer.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Class Name="StructuralPatterns.Facade.Parser">
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<Position X="10" Y="5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>AAAgAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAA=</HashCode>
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<FileName>Facade\Parser.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Class Name="StructuralPatterns.Facade.TestFacade">
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<Position X="7.25" Y="2.5" Width="1.5" />
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<TypeIdentifier>
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<HashCode>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAI=</HashCode>
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<FileName>Facade\TestFacade.cs</FileName>
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</TypeIdentifier>
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</Class>
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<Font Name="Segoe UI" Size="9" />
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</ClassDiagram>

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