被装饰类与装饰器抽象类共同实现的接口——IComponent
+ operation(params):void要被增加功能的方法
ConcreteDecoratorB
+ ConcreteDecoratorA(component:IComponent)-addedBehavior():void+ operation(params):void
装饰器抽象类——Decorator
-component:IComponent=null
+ Decorator(component:IComponent)+ operation(params):void
被装饰类——ConcreteComponent
+ operation(params):void
ConcreteDecoratorA
-addedState:string
+ ConcreteDecoratorA(component:IComponent)+ operation(params):void
