我的Design Pattern之旅[6]：Adapter Pattern(OO)(12)

C#

/**//*
(C) OOMusou 2007 http://oomusou.cnblogs.com

Filename　　: DP_AdpaterPattern_Strategy_Object.cs
Compiler　　: Visual Studio 2005 / Visual C# 2.0
Description : Demo how to use Strategy Pattern with Adapter Pattern (Object)
Release　　 : 07/11/2007 1.0
*/
using System;

interface IDrawStrategy {
　void draw();
}

class Grapher {
　protected IDrawStrategy _drawStrategy = null;

　public Grapher() {}

　public Grapher(IDrawStrategy drawStrategy) {
　　 _drawStrategy = drawStrategy;
　}

　public void drawShape() {
　　if (_drawStrategy != null)
　　　_drawStrategy.draw();
　}

　public void setShape(IDrawStrategy drawStrategy) {
　　_drawStrategy = drawStrategy;
　}
};

interface IPaint {
　void paint();
}

class Triangle : IPaint {
　public void paint() {
　　Console.WriteLine("Draw Triangle");
　}
}

class Circle : IPaint {
　public void paint() {
　　Console.WriteLine("Draw Circle");
　}
}

class Square : IPaint {
　public void paint() {
　　Console.WriteLine("Draw Square");
　}
};

class DrawAdapter : IDrawStrategy {
　protected IPaint _adaptee = null;

　public DrawAdapter() {}

　public DrawAdapter(IPaint adaptee) {
　　_adaptee = adaptee;
　}

　public void draw() {
　　_adaptee.paint();
　}
}

class ClIEnt {
　static void Main() {
　　Grapher grapher = new Grapher(new DrawAdapter(new Triangle()));
　　grapher.drawShape();

　　grapher.setShape(new DrawAdapter(new Circle()));
　　grapher.drawShape();

　　grapher.setShape(new DrawAdapter(new Square()));
　　grapher.drawShape();
　}
}