装饰者模式的另一种思路

今天看dubbo源码，发现一个很不错的装饰者设计模式；wrapperClasses 记录下；

/**
 * @Auther: penghaozhong
 * @Date: 2020-05-21 15:53
 */
public interface Test {

    String say(String name);

}

public class Test1 implements Test {

    private Test test;

    public Test1(Test test) {
        this.test = test;
    }

    @Override
    public String say(String name) {
        System.out.println("Test1");
        return test.say(name);
    }
}

public class Test2 implements Test {

    private Test test;

    public Test2(Test test) {
        this.test = test;
    }

    @Override
    public String say(String name) {
        System.out.println("Test2");
        return test.say(name);
    }
}

public class Test3 implements Test {

    private Test test;

    public Test3(Test test) {
        this.test = test;
    }

    @Override
    public String say(String name) {
        System.out.println("Test3");
        return test.say(name);
    }
}

public class TestA implements Test {

    @Override
    public String say(String name) {
        return "TestA-" + name;
    }
}



public class TestMain {
    public static void main(String[] args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        Set<Class<?>> wrapperClasses = Sets.newHashSet(Test1.class,Test2.class,Test3.class);
        Test instance = new TestA();
        if (CollectionUtils.isNotEmpty(wrapperClasses)) {
            for (Class<?> wrapperClass : wrapperClasses) {
                instance = (Test)wrapperClass.getConstructor(Test.class).newInstance(instance);
            }
        }

        String heihe = instance.say("heihe");
        System.out.println(heihe);
    }
}

输出结果

 

 

来源：oschina

链接：https://my.oschina.net/penghaozhong/blog/4286520