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sheimi/Decorator.java

Created November 9, 2014 05:50
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code in blog.sheimi.me: 2012-06-20-software-architecture-review-4 (3)
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Decorator.java
// Problem
abstract class VisualComponent {
void draw();
void resize();
}
class TextView extends VisualComponent {
void draw() {...}
void resize() {...}
}
class StreamVidoView VisualComponent {
void draw() {...}
void resize() {...}
}
// Answer
abstract class Decorator extends VisualComponent {
VisualComponent vc;
Decorator(VisualComponent vc) {this.vc = vc;}
void draw() {vc.draw();}
void resize() {vc.resize();}
}
abstract class Border extends Decorator {
void draw() {super.draw(); drawBorder();}
abstract void drawBorder();
}
class PlainBorder extends Border {
void drawBorder() {...}
}
...
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