Description Maxime Porhel 2014-07-10 11:44:19 EDT

Created attachment 244982 [details]
No diamond arrow for a bi-directionnal reference with containment

Steps to reproduce: 
 . Create/Open an Entity diagram
 . Create two classes C1 and then C2
 . Create a standard reference r_1_2 from C1 to C2
 . Create a Containment reference r_2_1 from C2 to C1
 . Set r_1_2 as the opposite of r_2_1 (properties view)
 . Set r_2_1 as the opposite of r_1_2 (properties view)

-> KO : the containment diamond is not displayed.

org.eclipse.emf.ecoretools.design.service.EReferenceServices.getEOppositeEReferences(EPackage, DSemanticDiagram) compute the list of bi-directionnal references. It take the first found EReference of each couple as main ref. 

So regarding the ref order (sorted by EClass and then by containment order in each EClass), the main ref / candidate used to build the DEdge is the containment EReference or the container EReference. 

So a solution is to add a specific StyleCustomization:
 . StyleCustomization feature:container
   . PropertyCustomization (by expr) targetArrow
   . PropertyCustomization (by expr) sizeComputationExpression