Description Maxime Porhel 2015-07-30 11:50:06 EDT

+++ This bug was initially created as a clone of Bug #473263 +++

Steps to reproduce: 
 . Open a DTree/DTable
 . Open the aird a text editor, modify it (add a space) and save
 . The aird is reloaded
 . Set the focus to the DTable/DTree editor
 . Popup "The root element has been deleted, the editor will close." > KO



The main issue seems to be the aird reload with an open Table or Tree editor: our Tree and Table editors are not able to resolve their proxy Viewpoint/Sirius element, see: 
 . AbstractDTableEditor.table
 . DTreeEditor.treeModel
 . DDiagramEditor.setFocus: getDiagramGraphicalViewer().getRootEditPart().getChildren().get(0): DDiagramEditPart.resolveSemanticElement is able to resolve the proxy.

Fast working DRAFT:
> private void checkSemanticAssociation() {
>   if (tableModel != null && tableModel.eIsProxy()) {
>     URI uri = ((InternalEObject) tableModel).eProxyURI();
>     tableModel = (DTable)
session.getTransactionalEditingDomain().getResourceSet().getEObject(uri, false);
>   }
>   if (tableModel == null || tableModel.eResource() == null || tableModel.getTarget() == null || tableModel.getTarget().eResource() == null) {
>  ...


Look for resolve/resolveSemanticeElement methods into GrapicalEditPart/ViewUiil/EMFCoreUtile/Util/EcoreUtil