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Re: [aspectj-users] about set pcd capabilities
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Thank you Eric.
Ulises J. M.
-----Original Message-----
From: eric.bodden@xxxxxxxxxxxxxx
To: aspectj-users@xxxxxxxxxxx
Sent: Mon, 27 Nov 2006 7:17 PM
Subject: RE: [aspectj-users] about set pcd capabilities
Oh, I just remembered...
What I said is not entirely true. There is a solution without using
reflection if you think 4D ;-)
The point is that if at time t_i there is a previous value for a field
this means that the field has been set before, at time t_{i-1}. So what
you can do is, every time the field is set, you store its value
somewhere on the heap, so that on the subsequent set-joinpoint it's
available from there.
I blogged an example ages ago here:
http://www.bodden.de/n/index.php?option=com_content&task=view&id=35&Item
id=31
There I also describe a 3rd solution using "tracematches".
Eric
> -----Original Message-----
> From: Eric Bodden
> Sent: Monday, November 27, 2006 5:35 PM
> To: 'aspectj-users@xxxxxxxxxxx'
> Subject: RE: [aspectj-users] about set pcd capabilities
>
> No, you have to use reflection.
>
>
> Eric
>
>
> > -----Original Message-----
> > From: aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-
> > bounces@xxxxxxxxxxx] On Behalf Of ujuarez71@xxxxxxxxxxxx
> > Sent: Monday, November 27, 2006 3:18 PM
> > To: aspectj-users@xxxxxxxxxxx
> > Subject: [aspectj-users] about set pcd capabilities
> >
> > Hi.
> >
> > Is there a way to know the previos value of a field when I apply a
> set
> > pcd ??
> >
> > Suppose I have the next piece of code:
> >
> > 1. double d;
> > 2. void m() {
> > 3. d = 5.5;
> > // a lot of code here
> > 40. d = Math.random();
> > 41. System.out.println(d);
> > 42. }
> >
> > I can use 'set(double d)' to know the new value will be assigned to
> 'd'
> > field. Can I know the OLD value of 'd' at line 40 ??
> >
> > Is it possible to apply get/set pcd and advising field 'd' at line 1
> ??
> >
> >
> > Best regards.
> >
> > Uli.
> >
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