Re: [aspectj-users] identifying a call within a method and harvest the p

["Ron Bodkin" <rbodkin@xxxxxxxxxxxxxx>]

Robert,

At the call join point, the args pointcut matches the arguments to the called method, not the arguments to the enclosing execution join point. Note that withincode selects where a join point occurs but it doesn't correspond to a kind of join point. As Elizabeth suggests, you can use cflow to achieve what you want:

     // a call in the cflow of a process call
     pointcut creationInCflow(Parameter param):
         cflow(execution(public Result Processor.process(Parameter)) &&
               args(param)) &&
         call(public Value Processor.createValue());

     // a call that is occuring directly within the code of a process method, if that's
     // really what you want
     pointcut creationInProcess(Parameter param):
         cflow(execution(public Result Processor.process(Parameter)) &&
               args(param)) &&
         withincode(public Result Processor.process(Parameter)) &&
         call(public Value Processor.createValue());

Ron

Ron Bodkin
Chief Technology Officer
New Aspects of Software
o: (415) 824-4690
m: (415) 509-2895

> ------------Original Message------------
> From: robert kuzelj <robert_kuzelj@xxxxxxxxx>
> To: aspectj-users@xxxxxxxxxxx
> Date: Fri, Jun-18-2004 6:05 AM
> Subject: [aspectj-users] identifying a call within a method and harvest the parameter
> 
> hi,
> 
> i want to weave something around a call to a
> method where the result of the around advice is dependent
> on a paramater value given to the calling method.
> 
> <code>
> public class Processor
> {
>    public Result process(Parameter _param)
>    {
>      ...
>      Value val = createValue();
>      ...
>    }
> 
>    public Value createValue()
>    {
>      return null;
>    }
> }
> </code>
> 
> now i want to do something like this
> 
> <code>
> public aspect ProcessCreation
> {
>     pointcut creation(Parameter _param):
>        withincode(public Result Processor.process(Parameter))
>     && args(_param)
>     && call(public Value Processor.createValue());
> 
>     Value around(Parameter _param): creation(_param)
>     {
>        Value result = null;
>        if (_param.getValue() == 0)
>        {
>           result = new Value("OK");
>        }
>        else
>        {
>           result = new Value("FAILED");
>        }
>        return result;
>     }
> }
> </code>
> 
> the problem is that as soon as i try to harvest the parameter
> from the surrounding method the advice gets not executed anymore
> (meaning the pointcut is not matched of course).
> 
> anybody any idea?
> 
> ciao robertj
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