Description Antti Karanta 2004-02-25 04:12:01 EST

In the AspectJ Programming guide, Appendix B: Language Semantics: Advice:

http://dev.eclipse.org/viewcvs/indextech.
cgi/~checkout~/aspectj-home/doc/progguide/semantics-advice.html

quote:
"A piece of around advice may be declared void, in which case it is not allowed 
to return a value, and instead whatever value the join point returned will be 
returned by the around advice (unless the around advice throws an exception of 
its own)."

Yet this does not seem to work:

public class AroundSample {

   public static void main(String[] args) {
      AroundSample s = new AroundSample();
      int x = s.aMethod();
   }

   public int aMethod() {
      System.out.println("Hello");
      return 0;
   }

}

aspect AroundSampleAspect {
 
   pointcut sampleOperations(): call(* AroundSample.*(..));
   
   void around(): sampleOperations() {
      System.out.println("before " + thisJoinPointStaticPart);
      proceed();  
      System.out.println("after " + thisJoinPointStaticPart);  
   }
   
}

It results in compilation error:

> ajc -Xlint -d classes src/testipaketti/AroundSample.java 
/home/akaranta/workspace/aspektitesti/src/testipaketti/AroundSample.java:21 
applying to join point that doesn't return void: method-call(int testipaketti.
AroundSample.aMethod())
/home/akaranta/workspace/aspektitesti/src/testipaketti/AroundSample.java:7 
applying to join point that doesn't return void: method-call(int testipaketti.
AroundSample.aMethod())

2 errors

So either the compiler or the documentation is wrong, my guess is the 
documentation in this case.