RE: [aspectj-users] Match a method call on a class field with specific a

[Rifflard Mickaël <Mickael.Rifflard@xxxxxxxxxxxxxx>]

Hi Andy,

As first idea, I would write this pointcut like this : 

    call(* *(..)) && target(MyClass.*) && @target(@MyAnnotation)
or
    call(* *(..)) && @target(@MyAnnotation MyClass.*)

This two writing would require the modification of the designator target or @target to add concept of class field.

Regards,

   Mickaël Rifflard



 -----Message d'origine-----
De : aspectj-users-admin@xxxxxxxxxxx [mailto:aspectj-users-admin@xxxxxxxxxxx]De la part de Adrian Colyer
Envoyé : jeudi 24 février 2005 16:53
À : aspectj-users@xxxxxxxxxxx
Objet : Re: [aspectj-users] Match a method call on a class field with specific annotation



This is an interesting use case because.... there's no easy way to do this. 

At a call join point, we know about the the *caller*, and the *callee*, we know the static context in which the call is being made (within, withincode), and the dynamic context in which the call is being made (cflow[below]), so whilst we can say: 

"any call where the type of the target of the call has an annotation @ABC..." 

we don't have a way to say: 

"any call where the target of the call is currently refered to by a member variable, and that member variable has an annotation of type @ABC..." 

The closest thing you can say is 

"any access to a field with annotation @MyAnnotation"  : get(@MyAnnotation * *) 

Using reflection it should be possible, but awkward to get closer what you want: 

pointcut annotatedFieldCall() : call(* *(..)) && if(calleeIsAFieldWithMyAnnotation(thisJoinPoint); 

private static boolean calleeIsAFieldWithMyAnnotation(JoinPoint tjp) { 

  / / pseudo-code... 

   Object obj = tjp.getThis(); 
   for-all (Field field : obj.getClass().getDeclaredFields()) { 
      if (field.hasAnnotation(MyAnnotation.class) return true; 
   } 
    

   return false; 
} 


but it's not pretty.... (and only works for fields defined within the calling class). 

If you *could* write a pointcut to match this, how would you want it to look? 

-- Adrian
Adrian_Colyer@xxxxxxxxxx 


Rifflard Mickaël <Mickael.Rifflard@xxxxxxxxxxxxxx> 
Sent by: aspectj-users-admin@xxxxxxxxxxx 
23/02/2005 08:22 Please respond to
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Subject[aspectj-users] Match a method call on a class field with specific annotation







Hi all,

I don't succeed to express with AspectJ 5 this expression :

                Match a method call on a class field with specific annotation
                (Of course, I don't know the name of the class and field)

Exemple : 

                public class MyClass {

                                 @MyAnnotation
                                 public static SortedMap myMap1 = new TreeMap();

                                 public static SortedMap myMap2 = new TreeMap();

                                 public static void main(String[] args) {
                                                  myMap1.put("key","value"); // Match this method call
                                                  myMap2.put("key","value"); // Don't match this method call
                                 }
                }

Any suggestion would be appreciated,

Regards

                Mickaël Rifflard


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