Re: [aspectj-users] Advice on Constructors With Subclasses

["Eric Bodden" <eric.bodden@xxxxxxxxxxxxxx>]

Try the following:

after() returning(A created): call(A+.new(..)) {

}

Eric

2008/9/2 BiggusJimmus <jvelliott@xxxxxxxxx>:
>
> I am attempting to write some advice that will run only after the
> construction has completely finished, i.e. after the an object has been
> completely initialized.
>
> An object can be created in any of the types in an inheritance tree, and
> thus, I would like to advise all of the constructors, but only run the
> advice once, after the object has been constructed.
>
> This is probably easier to describe via an example:
>
> public class A {
>    public A() {
>        System.out.println("init A");
>    }
> }
>
> public class B extends A {
>    public B() {
>        super();
>        System.out.println("init B");
>    }
> }
>
> public class C extends B {
>    public C() {
>        super();
>        System.out.println("init C");
>    }
> }
>
> after(A item) : execution(A+.new()) && target(item) {
>    System.out.println(thisJoinPoint.getSourceLocation());
> }
>
> public static void main(String[] args) {
>    C c = new C();
>    B b = new B();
> }
>
> The above code has the following output:
> init A
> A.java:3
> init B
> B.java:3
> init C
> C.java:3
>
> init A
> A.java:3
> init B
> B.java:3
>
> What I am attempting to create is advice that will produce the following:
> init A
> init B
> init C
> C.java:3
>
> init A
> init B
> B.java:3
>
> i.e. Only run the advice after the object is completely created
>
> I have tried a few approaches, including !within(A+.new()) and
> !cflow(execution(A+.new()), but due to the way the compiler inlines the
> super() calls, these approaches produce the same results as above.
>
> Does anybody have any experience with this problem, and/or suggestions on
> how to solve it?
> --
> View this message in context: http://www.nabble.com/Advice-on-Constructors-With-Subclasses-tp19280739p19280739.html
> Sent from the AspectJ - users mailing list archive at Nabble.com.
>
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>



-- 
Eric Bodden
Sable Research Group
McGill University, Montréal, Canada