Decorator Pattern

最新推荐文章于 2025-11-23 17:28:22 发布

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#装饰器模式

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本文探讨了装饰者模式如何增强现有功能，区别于代理模式，后者通常隐藏原始对象并提供扩展行为。同时，揭示了代理模式与适配器模式的相似之处，以及它们在接口实现上的差异。通过实例展示了装饰器和代理在`Test`类中的应用。

Decorator pattern is to enhance existing function, decorator and original class implement same interface, from implementation it's close to proxy pattern.

The difference between decorator and proxy is, decorator is to enhance existing function, after that we still have the object instance, it's just the way to implement it has been enhanced; but proxy is normally we want to hide original object instance, we want to give a proxy implementation and may give additional steps before or after orignial method.

From above part, we can see proxy pattern is also close to adapter pattern, but in proxy pattern, proxied class and proxy class they will implement same interface, in adapter pattern normally we use it because adapter class and adaptee class implement different interface, hence we use adapter to covert the implementation.

public class Test {
    public static void main(String[] args) {
        DecoratorFilter decorator = new DecoratorFilter(new DecoratorBeauty(new Phone()));
        decorator.takePhotograph();
    }
}