| Re: [aspectj-users] implement an interface by subclassing |
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Hoi Jan, I think what you did not realise is that call pointcuts match based on the declared type. Thus, your advice does not run on the call new SomeSubClass().someMethod(); but does run when you use ((SomeInterface)new SomeSubClass()).someMethod(); You can modify the pointcut to include the SomeInterface subclasses to also include the top method call: pointcut someCall(): call(void SomeInterface+.someMethod()); cheers, - Gijs Peek Jan Van Besien wrote: > Hi all > > I recently bumped into a problem using aspectJ that I can't seem to > explain. If I implement an interface by subclassing from a class > that happens to have the correct methods to implement the interface > (but doesn't implement the interface in intself), aspectJ advices > are not being executed with call or execution pointcuts for a > method in the implemented interface. > > An example: > > 1) Interface to be implemented: SomeInterface.java > > public interface SomeInterface { void someMethod(); } > > 2) Class with correct methods, without implementing the interface: > SomeClass.java > > public class SomeClass { public void someMethod() { > System.out.println("some method in some class"); } } > > 3) Subclass that implements the interface by extending from > SomeClass: SomeSubClass.java > > public class SomeSubClass extends SomeClass implements > SomeInterface {} > > 4) A simple aspect: > > aspect SomeAspect { pointcut someCall(): call(void > SomeInterface.someMethod()); > > before(): someCall() { System.out.println("Entering: " + > thisJoinPoint); } } > > Now, when you call 'someMethod' on an instance of SomeSubClass, the > advice is not executed. > > new SomeSubClass().someMethod(); > > When you let SomeClass implement the SomeInterface interface > directly, everything works as expected. > > What am I missing here? > > Thanx in advance Jan > _______________________________________________ aspectj-users > mailing list aspectj-users@xxxxxxxxxxx > https://dev.eclipse.org/mailman/listinfo/aspectj-users |