简单工厂
简单工厂由工厂类,抽象产品类和具体产品类组成
1.抽象产品接口
package { public interface IGraph { function draw():void } }
2.产品工厂类
package { public class GrapFactory { public function GrapFactory() { } public static function factory(shape:String):IGraph { switch (shape) { case "circle": return new Circle(); break; case "triangle": return new Triangle(); break; default: throw new Error("shape is not exit"); break; } } } }
3.具体产品类
package { import flash.display.Shape; public class Circle extends Shape implements IGraph { public var radius:Number public function Circle() { } public function draw():void { this.graphics.lineStyle(1); this.graphics.drawCircle(0,0,radius); } } } package { import flash.display.Shape; import flash.geom.Point; public class Triangle extends Shape implements IGraph { public var p1:Point; public var p2:Point; public var p3:Point; public var p4:Point; public function Triangle() { } public function draw():void { this.graphics.lineStyle(1); this.graphics.moveTo(p1.x,p1.y); this.graphics.moveTo(p2.x,p2.y); this.graphics.moveTo(p3.x,p3.y); this.graphics.moveTo(p1.x,p1.y); } } }
4.调用
package { import flash.display.Sprite; public class shejimoshi extends Sprite { public function shejimoshi() { var circle:Circle = GrapFactory.factory("circle") as Circle; circle.radius = 20; circle.draw(); addChild(circle); } } }