Re: [aspectj-users] How to retrieve a parent argument.

[Adrian Colyer <adrian.colyer@xxxxxxxxx>]

On 03/11/05, Laurent Burgy <burgy@xxxxxxxxxx> wrote:
> Hi all,
>
> maybe it's really simple but i didn't know how to do...
>
> if i have:
>
> public void m1( int foo ) {
>
>        m2();
>        m3();
>
> }
>
> If i want to do something around m2 considering the value of foo, how
> may i do it?
>
> public void m1( int foo) {
>
>      if( foo < 42 )
>          titi.m2();
>      else
>          toto.m4();
>
>      tutu.m3();
> }
>
> How can i retrieve the value of foo or  a reference to it ?
> In the same time, how can I retrieve a reference to the current object (
> the one to which "this" refers in the m1 method ) ?
>
>
>
> Regards,
>
> PS: Sorry for my english
>
> _______________________________________________
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> aspectj-users@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>

You need to bind the foo argument of m1 in a control-flow context so
that it is available at join points in the cflow below the execution
of m1. For example:

pointcut m1Execution(int foo) : execution(* m1(..)) && args(foo);

pointcut callTo_m2() : call(* m2(..));

Object around(int foo) : callTo_m2() && cflowbelow(m1Execution(foo)) {
   // now you can use foo in the advice body, e.g.
   if (foo > 5) {.....
      return proceed(29);
   }
}

--
-- Adrian
adrian.colyer@xxxxxxxxx