springaopspring-aoppointcut

Spring AOP pointcut for annotated argument

Say I have a method like so:

public void method(@CustomAnnotation("value") String argument)

Is there a pointcut expression that could select all methods with arguments annotated with @CustomAnnotation? If so is there a way I could get access go the "value" argument?

Solution

  • On selecting your arguments :

    @Before("execution(* *(@CustomAnnotation (*)))")
public void advice() {
System.out.println("hello");
}

    ref : http://forum.springsource.org/archive/index.php/t-61308.html

    On getting the annotation param : 

    MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
Annotation[][] methodAnnotations = method.getParameterAnnotations();

    Will get you the annotations which you can iterate and use instanceof to find your bound annotation. I know thats hacky but afaik this is the only way supported currently.