Description Arthur Daussy 2011-10-20 05:46:30 EDT

Created attachment 205601 [details]
Models to reproduce the bug

When delete an element with a stereotype a UMLStereotypeApplicationRemoval diff is created. Which look like: 
Stereotype <Stereotype> Block has been unapplied on null.

How to reproduce:
 1. Create two model with one element stereotyped
 2. Delete this element in the "left" model
 3. Run comparison
 4. See result.
(See also models in attachment)

My guess is that the problem come from UMLStereotypeApplicationRemovalFactory.handles(DiffElement) which should test that the left based element is still available. I have tried to correct with:

	public boolean handles(DiffElement input) {
		if (input instanceof ModelElementChangeRightTarget) {
			final EObject rightElement = ((ModelElementChangeRightTarget)input).getRightElement();
			final Element rightBase = UMLUtil.getBaseElement(rightElement);
			if (rightBase != null) {
				final EObject leftBase = getEngine().getMatched(rightBase, MatchSide.LEFT);
				return leftBase != null;
			}
		}
		return false;
	}

But there is still some problems.

Regards,