Hi
Im new to AOP and AspectJ. Currently Im studying an aspect oriented library
to support associations as cross cutting concerns.
In this library I have an aspect /SimpleStaticRel/ that alters the type
hirarchy and introduce new members to the formal type parameters /FROM/ and
/TO/.
Below I present a snippet of the original implementation which is relevant
to my question.
#1:
If I declare /final private HashSet<TO> Fwd.fwd = new HashSet<TO>();/ I get
the follwoing compile error: The method add(TO) in the type HashSet<TO> is
not applicable for the arguments (TO)
forward.fwd.add(_t);
#2:
Here I have made a test which shows me that its possible to parameterize a
HashSet with generic type /FROM/. This HashSet is a member of the aspect and
is not introduced as a member of FROM.
Why is it ok to parameterize in this situation?
----------------------------- -----------------------------
----------------------------- -----------------------------
-----------------------------
import java.util.*;
public abstract aspect SimpleStaticRel <FROM,TO>{
public static interface Fwd {}
//public static interface Bwd {}
declare parents : FROM implements Fwd;
// #1
final private HashSet<TO> Fwd.fwd = new HashSet<TO>();
//final private HashSet Fwd.fwd = new HashSet();
// #2
private HashSet<TO> myHash = new HashSet<TO>();
public boolean add(FROM _f, TO _t) {
myHash.add(_t);
return true;
}
public boolean andreasAdd(FROM _f, TO _t) {
Fwd forward = (Fwd) _f;
forward.fwd.add(_t);
return true;
}
}
Thank you / dres
_______________________________________________
aspectj-users mailing list
[email protected]
https://dev.eclipse.org/mailman/listinfo/aspectj-users
