Re: about PointCut selection and Context Parameter

Hi Shiyiying.

It is actually possible to change the parameters in the current version
of AspectWerkz.

You simple cast the JoinPoint to f.e. MethodJoinPoint and call the
setParameters(Object[] params) method for changing the parameters.

The parameters are held within the JoinPoint class and are not passed
explicitly through the proceed() method as in AspectJ.

Best regards.

Jonas.



 娑 wrote:
> Hi Jonas:
> 
> Aspectwerkz seems very different from other's aop frameworks. I think it 
> is "practical" AspectJ.
> But I have some questions:
> 1.In AspectJ, you can select a PointCut by combine some conditions,and 
> can provide some parameters, such as:
> 
> pointcut setXY(FigureElement fe, int x, int y):
>   call(void FigureElement.setXY(int, int))   && target(fe)   && args(x, y);
> 
> around(FigureElement fe, int x, int y): setXY(fe, x, y) {
>   System.out.println(fe + " moved to (" + x + ", " + y + ").");
>   x++;
>   proceed(fe,x,y);
> }
> 
> in this around advice, we can change x's value , and proceed to next 
> advice(or org method) with the new parameter.
> But in Aspectwerk,jointpoint proceed() has no parameter.Is it means we 
> cannot change parameter like AspectJ?
> 
> 2.How can I select PointCut by attribute(and combine with others)?
> 3.Would Aspectwerkz implement PreAdvice,PostAdvice and Around advice 
> like AspectJ?
> Now in Aspectwerkz,every advice is around advice.
> For example, can we just declare a PreAdvice in XML, and in this advice 
> class's execute method, we can just do our aspect thing,and need not to 
> invoke proceed method?
> Best regards
> shiyiying
> 
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-- 
Jonas
http://freeroller.net/page/jboner





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