Bug 506322

Description Pierre-Charles David 2016-10-21 06:22:56 EDT

Created attachment 264985 [details]
Sample data to reproduce the bug

This is somewhat similar to the "zombie viewpoints" of but #475598, but is actually a regression introduced by part of commit de35505b28c6c6f5d583f3616950708e36b02b73 for bug #442133.

Steps to reproduce:
1. Download an extract the attached zombie.zip archive *outside of the workspace*.
2. Import the plain project zombie/t and zombie/v1/zombie-vsm in the workspace. Make sure to check "Copy projects into the workspace".
3. Create a representation file on t/sample.ecore, enable the "zombie" viewpoint, and create a diagram on the EPackage in the model. The diagram should show a single EClass as a green square, as defined in v1 of the VSM.
4. While keeping the session and diagram editor open, delete the zombie-vsm project (with "Delete project contents from disk" checked).
5. Import zombie/v2/zombie-vsm in the workspace. Make sure to check "Copy projects into the workspace".
6. Refresh the representation. Nothing happens, it does not even become dirty. The v2 of the VSM defined the same node mapping with a different style (red diamond), but this is not taken into account (KO).
7. Close the session, reopen it and reopen the diagram. Now it is taken into account and the green square has become a red diamond.

This kind of scenario used to work, and while not critical as its does not correspond to a "canonical" use case, it is useful in the context of demos and tutorials, when you want to replace a modeler definition with a different version (e.g. revert to a known-good version if the user is lost during a tutorial).