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Commit 7465f32

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Add implementation of Prototype DP.
1 parent 7157d28 commit 7465f32

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6 files changed

+214
-16
lines changed

6 files changed

+214
-16
lines changed

‎Prototype/Participants.txt‎

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The classes and objects participating in this pattern are:
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Prototype (ColorPrototype)
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declares an interface for cloning itself
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ConcretePrototype (Color)
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implements an operation for cloning itself
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Client (ColorManager)
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creates a new object by asking a prototype to clone itself

‎Prototype/Program.RealWorldCode.cs‎

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using System;
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using System.Collections.Generic;
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namespace DoFactory.GangOfFour.Prototype.RealWorld
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{
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/// <summary>
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/// MainApp startup class for Real-World
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/// Prototype Design Pattern.
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/// </summary>
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class MainApp
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{
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/// <summary>
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/// Entry point into console application.
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/// </summary>
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static void Main()
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{
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ColorManager colormanager = new ColorManager();
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// Initialize with standard colors
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colormanager["red"] = new Color(255, 0, 0);
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colormanager["green"] = new Color(0, 255, 0);
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colormanager["blue"] = new Color(0, 0, 255);
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// User adds personalized colors
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colormanager["angry"] = new Color(255, 54, 0);
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colormanager["peace"] = new Color(128, 211, 128);
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colormanager["flame"] = new Color(211, 34, 20);
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// User clones selected colors
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Color color1 = colormanager["red"].Clone() as Color;
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Color color2 = colormanager["peace"].Clone() as Color;
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Color color3 = colormanager["flame"].Clone() as Color;
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// Wait for user
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Console.ReadKey();
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}
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}
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/// <summary>
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/// The 'Prototype' abstract class
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/// </summary>
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abstract class ColorPrototype
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{
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public abstract ColorPrototype Clone();
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}
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/// <summary>
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/// The 'ConcretePrototype' class
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/// </summary>
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class Color : ColorPrototype
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{
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private int _red;
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private int _green;
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private int _blue;
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// Constructor
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public Color(int red, int green, int blue)
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{
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this._red = red;
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this._green = green;
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this._blue = blue;
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}
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// Create a shallow copy
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public override ColorPrototype Clone()
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{
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Console.WriteLine(
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"Cloning color RGB: {0,3},{1,3},{2,3}",
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_red, _green, _blue);
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return this.MemberwiseClone() as ColorPrototype;
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}
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}
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/// <summary>
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/// Prototype manager
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/// </summary>
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class ColorManager
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{
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private Dictionary<string, ColorPrototype> _colors =
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new Dictionary<string, ColorPrototype>();
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// Indexer
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public ColorPrototype this[string key]
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{
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get { return _colors[key]; }
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set { _colors.Add(key, value); }
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}
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}
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}
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//Output:
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//Cloning color RGB: 255, 0, 0
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//Cloning color RGB: 128,211,128
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//Cloning color RGB: 211, 34, 20

‎Prototype/Program.StructuralCode.cs‎

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using System;
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/// <summary>
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///A fully initialized instance to be copied or cloned
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///
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/// Specify the kind of objects to create using a prototypical instance,
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/// and create new objects by copying this prototype.
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///
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/// Frequency of use: 3 Medium.
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/// </summary>
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namespace DoFactory.GangOfFour.Prototype.Structural
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{
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/// <summary>
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/// MainApp startup class for Structural
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/// Prototype Design Pattern.
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/// </summary>
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class MainApp
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{
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/// <summary>
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/// Entry point into console application.
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/// </summary>
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static void Main()
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{
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// Create two instances and clone each
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ConcretePrototype1 p1 = new ConcretePrototype1("I");
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ConcretePrototype1 c1 = (ConcretePrototype1)p1.Clone();
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Console.WriteLine("Cloned: {0}", c1.Id);
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ConcretePrototype2 p2 = new ConcretePrototype2("II");
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ConcretePrototype2 c2 = (ConcretePrototype2)p2.Clone();
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Console.WriteLine("Cloned: {0}", c2.Id);
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// Wait for user
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Console.ReadKey();
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}
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}
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/// <summary>
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/// The 'Prototype' abstract class
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/// </summary>
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abstract class Prototype
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{
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private string _id;
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// Constructor
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public Prototype(string id)
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{
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this._id = id;
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}
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// Gets id
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public string Id
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{
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get { return _id; }
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}
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public abstract Prototype Clone();
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}
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/// <summary>
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/// A 'ConcretePrototype' class
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/// </summary>
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class ConcretePrototype1 : Prototype
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{
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// Constructor
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public ConcretePrototype1(string id)
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: base(id)
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{
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}
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// Returns a shallow copy
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public override Prototype Clone()
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{
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return (Prototype)this.MemberwiseClone();
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}
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}
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/// <summary>
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/// A 'ConcretePrototype' class
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/// </summary>
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class ConcretePrototype2 : Prototype
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{
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// Constructor
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public ConcretePrototype2(string id)
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: base(id)
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{
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}
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// Returns a shallow copy
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public override Prototype Clone()
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{
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return (Prototype)this.MemberwiseClone();
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}
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}
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}
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//Output:
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//Cloned: I
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//Cloned: II

‎Prototype/Program.cs‎

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This file was deleted.

‎Prototype/Prototype.csproj‎

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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Program.cs" />
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<Compile Include="Program.RealWorldCode.cs" />
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<Compile Include="Program.StructuralCode.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="App.config" />
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</ItemGroup>
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<ItemGroup>
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<Content Include="Participants.txt" />
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<Content Include="prototype.gif" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.

‎Prototype/prototype.gif‎

6.42 KB
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