@AspectJ pointcut for subclasses of a class with an annotation

Question

I'm looking for a pointcut that matches method executions in classes that subclass a class with a specific annotation. The excellent AspectJ cheat sheet helped me to create the following pointcut:

within(@my.own.annotations.AnnotationToMatch *) && execution(* *(..))

This matches all method calls of a class A that carries the @AnnotationToMatch, but not method of a class B that extends A. How can I match both?

alehro · Accepted Answer · 2011-08-22 08:53:34Z

3

public aspect AnnotatedParentPointcutAspect { //introducing empty marker interface declare parents : (@MyAnnotation *) implements TrackedParentMarker; public pointcut p1() : execution(* TrackedParentMarker+.*(..)); before(): p1(){ System.out.println("Crosscutted method: " +thisJoinPointStaticPart.getSignature().getDeclaringTypeName() +"." +thisJoinPointStaticPart.getSignature().getName()); } }

answered Aug 22, 2011 at 8:53

alehro

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2 Comments

Dr. Hans-Peter Störr Over a year ago

Thanks! For the benefit of others: if you use the annotation style, the declare parents translates to @DeclareParents("(@MyAnnotation *)") private TrackedParentMarker emptyMixinForClassesWithMyAnnotation;

ddimitrov Over a year ago

That works well for super-classes, but not so well for interfaces. I.e. in code such as MyInterface o = new MyClass() it looks loke MyClass gets loaded before the interface and the condition doesn't match. Adding a println(MyInterface.class) before the statement fixes the problem, but is not feasible requirement for library aspects. Any ideas?

Dr. Hans-Peter Störr · Accepted Answer · 2011-08-24 16:17:46Z

3

Another and simpler possibility is to declare the annotation as @Inherited - thus it applies to the subclasses as well.

answered Aug 24, 2011 at 16:17

Dr. Hans-Peter Störr

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1 Comment

alehro Over a year ago

But it won't work if you cannot declare annotation as @Inherited. E.g. base classes from third party libraries.

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