[news.eclipse.tools.emf] ChangeRecorder issue ?

[stephane.fournier@xxxxxxxxxxxxxxx (Stephane)]

Hi,

I'm using the ChangeRecorder API and I have got a weird problem.

I monitor an EMF object "Canvas" that has a containment reference named 
"figures" of type Figure .

Let's imagine, one instance of this "Canvas" named canvas1 has 2 objects 
contained in the "figures" feature.

a) I start a change recorder for canvas1.
b) I unset the "figures" containment feature.
c) I end the change recorder and get the change description.

Result : no change happens for canvas1 : 
ChangeDescription#getObjectChanges(), ChangeDescription#getObjectsToAttach 
or ChangeDescription#getObjectsToDetach are empty  collections !! Weird 
isn'it ?

When ending the change recorder, the 
BasicChangeRecorder#eliminateEmptyChanges() is called.
I debug the code, and the featureChange is retrieved according the unset 
on the "figures" feature. 
Nevertheless, It compares the value registered into the featureChange with 
the current value of the related feature on canvas1.  Both lists are empty 
ones and hence equals, the featureChange is removed... What's a pitty !!

Is it a bug or normal behavior ? How can i figure out that issue ?

Stephane.