[news.eclipse.modeling.gmf] Re: Object multiplicity in the diagram

[Adrian Gygax <adrian.gygax@xxxxxxxxxx>]

Hi Marcin,

Cardinalities defined in the ecore model are not translated by GMF into 
validations automatically. You have to take further manual steps for that.

If you want to automatically create a B if A ist created, you can modify 
doDefaultElementCreation() in your ACreateCommand class to 
programmatically add a B object to the newly created A object.

To validate the cardinalities you can use GMF's validation functionality 
which is introduced here: 
http://wiki.eclipse.org/GMF_Tutorial_Part_2#Validation

Adrian

Marcin Cylke schrieb:
> Hello
> I'm generating a GMF editor from an ecore model. I have some parent 
> object that should be placed on the diagram - lets call it A. It can 
> have one object B and 0..* objects B. I've specified that condition in 
> Ecore model, but generated diagram does not obey that, and I have to 
> place object B by myself. Moreover, I'm able to place more B-objects 
> than one.
>
> How can I force such object's multiplicity?
>
> Marcin