Decorator - 객체의 기능을 장식하기

When Using It

객체의 본질적인 정보와 실제 보여지는 기능을 분리하고 싶을때

Class Diagram

Sample Code



public abstract class Component {

public abstract String operation();

}

public class ConcreteComponent extends Component {

private String name;

public ConcreteComponent(String name) {

this.name = name;

}

@Override

public String operation() {

return this.name;

}

}

public abstract class Decorator extends Component {

protected Component component;

public Decorator(Component component) {

this.component = component;

}

public abstract void display();

}

public class ConcreteDecorator extends Decorator {

public ConcreteDecorator(Component component) {

super(component);

}

@Override

public void display() {

System.out.println(this.operation());

}

@Override

public String operation() {

return "+" + component.operation() + "+";

}

}

 
Caution

특별한 주의사항은 없다.