hi,
Any update on this please.
*Issue:*
1. I have a variable defined with annotation
2, This variable is being assigned to an ArrayList
*Now, i want to intercept this call *and execute a logic by AOP. In the
interception
1. I should be able to access the annotated value
2. Return a new object called MYLIst
The below mail therad is abt the same,
1. If i use set(* *List) then i cant access the annotation
2. If i use the below its (in eclipse) is throwing compilation errors
pointcut listCut(LIST in) : set(@LIST* (*) * ) && @annotation(in);
ArrayList around( LIST in) :listCut(in){
System.out.println("**annotation " + thisJoinPoint + " ann:"
+ in.value());
return new MyList();
}
*The java class i want to intercept::*
public static void main(String[] argv) {
UserAttributes u = new UserAttributes();
u.alias = new ArrayList();
}
*Any ideas where i am going wrong? Please help.*
Regards,
Ravi
---------- Forwarded message ----------
From: Ravi Chandra <ravi....@gmail.com>
Date: Sun, Jun 21, 2009 at 7:23 PM
Subject: Re: [aspectj-users] (no subject)
To: aspectj-users@eclipse.org
hi,
That was an intelligent soln.
But, I have annotations on each of the fields( i didnt mention this
previously) and during the interception by AOP i would like to access the
annotated info also.
*Original Class:*
public class UserAttributes implements Interceptable {
@IN(3)
private List<String> alias;
public int getAge() {
return age;
}
public static void main(String[] argv) {
UserAttributes u = new UserAttributes();
u.alias = new ArrayList();
u.children = new HashMap<String, String>();
}
}
*and i tried:*
pointcut annCut(Interceptable m, IN in):target(m) && set(@IN* (*) * ) &&
@annotation(in);
pointcut annListCut(Interceptable m, IN in) : cflow(annCut(m,in)) &&
cflow(listCut()) && target(Interceptable+);
after/ Around (Interceptable m, IN in): annListCut(m,in){
* //here i should be able to get the fields annotation + return
MYList object*
System.out.println("point cut + annotation is.." + in.value());
}
*But this is cutting off *
* public int* getAge() {
return age;
}
method also, *which is not intended. *
Any ideas please..
regards,
ravi
On Sun, Jun 21, 2009 at 3:40 PM, Simone Gianni <simo...@apache.org> wrote:
> Hi Ravi,
> you can declare a pointcut around the creation of any ArrayList, returning
> MyArrayList as long as they are assign-compatible.
>
> That means that as long as :
>
> public class MyArrayList extends ArrayList { ...
>
> you can write :
>
> ArrayList around() : call(* ArrayList.new()) {
> return new MyArrayList();
> }
>
> This will replace do the trick. You can narrow it down to some classes
> using within, withincode etc..
>
> ArrayList around() : call(* ArrayList.new()) && within(com.mycompany.*) {
> return new MyArrayList();
> }
>
> And you can add other advice to add parameters :
>
> ArrayList around(int size) : call(* ArrayList.new(int)) && args(size) {
> return new MyArrayList(size);
> }
>
> etc...
>
> In my Apache Magma Lab I use this kind of advice extensively to offer a
> simpler alternative to the factory pattern/dependency injection/context
> pollution.
>
> Hope this helps,
> Simone
>
>
>
>
>
> Ravi Chandra wrote:
>
>> hi,
>>
>> I am trying hard to get a solution to this problem since last 4 days.. but
>> no luck; the issue is as below:
>>
>> I have java classes of this form
>>
>> public class UserAttributes implements Interceptable {
>> private List<String> alias;
>> private void someMethod(){
>> *alias = new ArrayList(); // point 1*
>> .... etc etc
>> }
>> }
>>
>> Now the problem is :
>>
>> When ever a variable is assigned to new ArrayList() i want it to be
>> changed to new MyArrayList() instead
>>
>> i.e..: the point 1 above changes to an eqvivalent of
>>
>> *alias = new MYArrayList();*
>>
>> I am able to get this done
>>
>> aspect abc {
>> pointcut listCut(Interceptable m, IN in):target(m) &&
>> set(java.util.List+ *);
>> after(Interceptable m, IN in):listCut(m,in){
>> *UserAttributes.setAlias( new MyArrayList());*
>> }
>> }
>>
>> *but the point cut is getting very class specific. *I have abt 1000
>> classes which have to be modified this way where ever the ArrayList is being
>> used, now with this approach i need to write 1000 files; isnt there a
>> generic way to do this?
>>
>> Any pointers/ help ? please suggest.
>>
>> regards,
>> ravi
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> aspectj-users mailing list
>> aspectj-users@eclipse.org
>> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>>
>>
>
>
> --
> Simone Gianni CEO Semeru s.r.l. Apache Committer
> http://www.simonegianni.it/
>
> _______________________________________________
> aspectj-users mailing list
> aspectj-users@eclipse.org
> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>
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