Re: [aspectj-users] Adding a new buddy field for EVERY existing field in

[y a <yaniv.azriel.samsung@xxxxxxxxx>]

Thanks Ron

About this shaodw class...
Even if i have a shadow class for each original class
The set() advice still need runtime reflection or a switch statement
to set the shadow field ?!

I cant find too many examples on set()/get()

UPDATE

The map solution is easy and works

I thought about injecting a buddy *object* into each real object (i.e. no new classes), using aspectj to skip all method execution, and only use the fields for storage.
Is there some execution side effect which i wont be able to skip?

TIA

On Sat, Mar 9, 2013 at 4:20 PM, Ron DiFrango <rdifrango@xxxxxxxxxxxxxxxxxxxxx> wrote:

Without creating a aspectj shadow class that gets "injected" via an intertype declaration, I don't see a way to do it without reflection and/or using the map approached referenced in your post.

Ron DiFrango            
Director / Architect  |  CapTech
(804) 855-9196  |  rdifrango@xxxxxxxxxxxxxxxxxxxxx

---

From: aspectj-users-bounces@xxxxxxxxxxx [aspectj-users-bounces@xxxxxxxxxxx] on behalf of y a [yaniv.azriel.samsung@xxxxxxxxx]
Sent: Saturday, March 09, 2013 7:18 AM
To: aspectj-users@xxxxxxxxxxx
Subject: [aspectj-users] Adding a new buddy field for EVERY existing field in a class ?!

I want an aspect to store the old value for each field set operation

So if a class has 3 long fields, i now need 3 new fields in the aspect

Is this possible ?!

And is there a suitable ajc syntax to access such a buddy field in a set() advice ?

my example:

aspect to  "print" the field changes, but i need the new fields to "store" the values

import java.io.*;
import org.aspectj.lang.reflect.FieldSignature;

aspect AspectField  {
      before(long newval): set(long *) && args(newval) {
     
         FieldSignature fs;
         fs = (FieldSignature)thisJoinPointStaticPart.getSignature();
         System.out.println(fs.getFieldType());
         System.out.println("FIELD SET TO " + newval); 

         // i want to store the newval here in a "buddy field"

      }
  }

[[ Eventually i want all of this to be done statically with out reflection but one bridge at a time.. ]]
[[ http://stackoverflow.com/questions/6698203/exposing-previous-value-in-aspectj-set-pointcut - this discussion stores all the fields in a single map - i dis like solution for performance.. ]]

TIA

_______________________________________________
aspectj-users mailing list
aspectj-users@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/aspectj-users