[henshin-dev] Problems with transformation in UML Models

[Marco Konersmann <marco.konersmann@xxxxxxxxxxxxxxxxx>]

Hi,

I have difficulties when transforming models that are based on the ecore 
meta model for UML.
The transformations always delete all elements and add them again, when 
they should not be touched.

I attached a trivial example for the model I use and two transformation 
rules as an Eclipse Project. I also included the UML meta model file for 
convenience.
The model is a UML "Model" as root and two "Classes" with the name "A" 
and "B".
The first rule (testRule) is a "Delete the class with the name 'A' that 
is a packagedElement in the model".
The execution then results in:
* remove A
* remove B
* add B

while I expected it to be
* remove A
only.

The second rule (testRule2) just has a LHS: "preserve Model". This 
results in
* remove A
* remove B
* add A
* add B

These changes make it nearly impossible for me to analyse the results of 
transformations in more complex UML models using the wizard, because for 
n elements I have about 2n changes in the model, regardless of the 
existence of a real change.

Interestingly this does not occur when I use a self-made meta-model.

Best regards
Marco

Attachment: uml-test-project.zip
Description: Zip archive