Spring AOP: how to get the annotations of the adviced method

Question

I\'d like to implement declarative security with Spring/AOP and annotations. As you see in the next code sample I have the Restricted Annotations with the paramter \"allowed

Answer 1

Even after changing the retention policy like Bozho mentioned this call to get annotation returns null:

targetMethod.getAnnotation(Restricted.class);

What I found is you have to bind the annotation. Given the interface is declared like this:

 @Retention(RetentionPolicy.RUNTIME)
 public @interface Restricted {
     String[] allowedRoles();
  }

The advice would need to be declared like this:

       @Before("@annotation( restrictedAnnotation )")
       public Object processRequest(final ProceedingJoinPoint pjp, Restricted restrictedAnnotation) throws Throwable {
                  String[] roles = restrictedAnnotation.allowedRoles();
                  System.out.println("Allowed:" +  roles);
       }

What this does is bind the annotation to the parameter in the method signature, restrictedAnnotation. The part I am not sure about is how it gets the annotation type, it seems to be based on the parameter. And once you have the annotation you can get the values.