Re: [aspectj-users] Join Point Static Part

[Simone Gianni <simoneg@xxxxxxxxxx>]

Hi Bhaskar and Mohan,
I think Bhaskar is trying to access method NAMES, not actual values. You can access method names in AspectJ, using MethodSignature.getParameterNames .. for example:

void around() : test(){
  Signature s = thisJoinPointStaticPart.getSignature();
  // Warning, this means you are weaving a method, otherwise there will be of another subclass of Signature
  MethodSignature m = (MethodSignature)s;
  String[] names = m.getParameterName();
  Object[] values = thisJoinPoint.getArgs();
  for (int i = 0; i < names.length; i++) {
    System.out.println(names[i] + " : " + values[i]);
  }
  proceed();
}

Names are present only if target code (the class you are weaving) has been compiled with debug symbols, which is true for 99% of java code actually available, but still could happen that you are weaving into a third party library which has been compiled without debug symbols.

Simone

2010/5/28 Mohan Radhakrishnan <radhakrishnan.mohan@xxxxxxxxx>

Hi Bhaskar,

I am using a simple around advice. The argument is printed. Is this
simiilar to what you are looking for ?

       pointcut test() : call( * com.test.TestClass.test1(..) );

       void around() : test(){

               System.out.println( thisJoinPoint.getArgs()[ 0 ] );

               proceed();
       }


       public void test1( int i){
       }

Thanks,
Mohan

On Thu, May 27, 2010 at 3:35 AM, Bhaskar Maddala <maddalab@xxxxxxxxx> wrote:
> Hello,
>
>    I am trying to write a logging aspect. Something that logs method
> arguments when the method executed. I was looking up the reflection
> apis for aspectj and did not find anything in either StaticPart,
> ProceedingJoinPoint or Signature that would give me the method
> arguments names.
>
> As as example
>    @Pointcut("execution(@Unit * *(..)) && @annotation(u) &&
> @within(ct) && this(cinstance)")
>    public void unit(Auditable cinstance, Container ct, Unit u) {
>    }
>
>    @Around(unit(ct, u))
>    public void do(ProceedingJoinPoint pjp, Auditable cinstance,
> Container ct, Unit u){
>      pjp.getMethodArgNames(); //???
>    }
>
>  Any ideas on where I can get the method argument names?
>
> Thanks
> Bhaskar
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