[aspectj-users] thisJoinPoint.getSignature().getMethod() returns NULL in a call join point

[Guido Schmutz]

Hi
 
I have the following strange behavior, where I’m not sure, if it’s a bug or if 
it’s a mistake on my side. I just prepared a small test case to show it
 
I have 2 interfaces, the first, the top defines mayPerform
 
public interface Authorization {
      boolean mayPerform(String user, String action);
}
 
The second extends the first and adds
 
public interface AuthorizationAdmin extends Authorization {
      boolean mayPerform2(String user, String action);
}
 
Then there is an implementation of these 2 methods doing nothing spectacular:
 
public class AuthorizationImpl implements AuthorizationAdmin {
 
      /* ========== interface Authorization ============*/
     
      public boolean mayPerform(String user, String action) {
            System.out.println("executing mayPerform()");
            return true;
      }
     
      /* ========== interface AuthorizationAdmin  ============*/
 
      public boolean mayPerform2(String user, String action) {
            System.out.println("executing mayPerform2()");
            return true;
      }
 
}
 
Here is the aspect, which returns NULL when calling the method mayPerform(..) 
on the Authorization Interface but when I call mayPerform2(..) it works fine.
 
public aspect CallAndMethodSignatureAspect {
 
      pointcut callAnyPublicMethodInAuthorization() : call(public * 
Authorization+.*(..) );
     
      Object around() : callAnyPublicMethodInAuthorization() {
           
            MethodSignature methodSignature = (MethodSignature) 
thisJoinPoint.getSignature();
 
            // returns NULL when calling a method defined in the top interface 
"Authorization"
            Method method = methodSignature.getMethod();
           
            System.out.println(method);
            System.out.println(methodSignature.toLongString());
 
            return proceed();
      }
}
 
 
Here is the unit test
 
import junit.framework.TestCase;
 
 
public class CallTest extends TestCase {
     
      private AuthorizationAdmin admin;
     
      public void testMayPerform() {
            admin = new AuthorizationImpl();
           
            boolean bool = admin.mayPerform("peter", "query");
           
            assertTrue(bool);
      }
 
      public void testMayPerform2() {
            admin = new AuthorizationImpl();
           
            boolean bool = admin.mayPerform2("peter2", "query2");
           
            assertTrue(bool);
      }
}
 
Why is that ? If I switch to execution instead of call then it works as 
expected. I can also provide the test project, if required.
 
I’m using AspectJ 1.5.2.
 
Thanks
Guido

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