Description Mikaël Barbero 2011-05-20 04:20:09 EDT

When setting/unsetting the value of a reference (from null to someting or something to null), the value referenced by the UpdateReference instance are the same. 

It appears that in the ReferencesCheck#createUpdatedReferenceOperation(EObject, EObject, EReference, EObject, EObject), the left/right targets are set to deleted/added values by only testing their nullity. The added/deleted values MUST be checked for nullity before assigning deleted/added values respectively to left/right targets.

Here is the patch:

== before ==

EObject leftTarget = getMatchedEObject(addedValue);
EObject rightTarget = getMatchedEObject(deletedValue);
// checks if target are defined remotely
if (leftTarget == null) {
	leftTarget = deletedValue;
}
if (rightTarget == null) {
	rightTarget = addedValue;
}

== after ==

EObject leftTarget = getMatchedEObject(addedValue);
EObject rightTarget = getMatchedEObject(deletedValue);
// checks if target are defined remotely
if (leftTarget == null && addedValue != null) {
	leftTarget = deletedValue;
}
if (rightTarget == null && deletedValue != null) {
	rightTarget = addedValue;
}