Modify a method using Annotations

Question

How can I change what a method is doing in Java ?

I mean, I am trying to use annotations to make the following code

@Anno1(Argument = \"Option1\")
p         


        

Answer 1

Well, you might see if the following boilerplate code will be useful:

public void magic(Object bean, String[] args) throws Exception {
    for (Method method : bean.getClass().getDeclaredMethods()) {
        if (method.isAnnotationPresent(Anno2.class)) {
            // Invoke the original method
            method.invoke(bean, args);
            // Invoke your 'z' method
            StaticReference.invokeAll();
        }
    }
}

As an alternative your might employ aspect oriented programming, for instance you have the AspectJ project.