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ID in derived EClass seems the same in different containments [message #896226]

Tue, 17 July 2012 16:05

John M.

Messages: 198
Registered: July 2010

Senior Member

Hello,

I have a model, which contains a abstract EClass with two attributes and one of it is an ID.
That EClass is extended by two others EClass declarations.

The validation doesn't succeed because I use in different containments the same ID.

I have attached a miniexample for demonstrating.

On the picture you can see, that the validation says that both in another list contained IDs collide with the first one (Ex Definition1 Test).
index.php/fa/10733/0/

Attachment: My.ecore
(Size: 2.42KB, Downloaded 112 times)
Attachment: My.genmodel
(Size: 2.25KB, Downloaded 147 times)
Attachment: My.miniexample
(Size: 0.33KB, Downloaded 122 times)
Attachment: unnamed.png
(Size: 18.09KB, Downloaded 170 times)

[Updated on: Tue, 17 July 2012 16:06]

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Re: ID in derived EClass seems the same in different containments [message #896343 is a reply to message #896226]

Wed, 18 July 2012 06:56

Ed Merks

Messages: 31161
Registered: July 2009

Senior Member

Comments below.

On 17/07/2012 6:05 PM, Missing name Mising name wrote:
> Hello,
>
> I have a model, which contains a abstract EClass with two attributes and one of it is unique.
Unique in what context?
> That EClass is extended by two others EClass declarations.
>
> The validation doesn't succeed because I use in different containments the same ID.
An ID means it must be unique within the scope of all objects of all
types in any given resource.
>
> I have attached a miniexample for demonstrating.
>
> On the picture you can see, that the validation says that both in another list contained IDs collide with the first one (Ex Definition1 Test).
Yes, I'd expect that. Perhaps you want to make use of EReference.eKeys
so that the containment reference itself declares which combination of
attributes in the referenced class are unique within the context of a
single containment list.
>

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Re: ID in derived EClass seems the same in different containments [message #896381 is a reply to message #896343]

Wed, 18 July 2012 08:44

John M.

Messages: 198
Registered: July 2010

Senior Member

>> On the picture you can see, that the validation says that both in another list contained IDs collide with the first one (Ex Definition1 Test).
> Yes, I'd expect that. Perhaps you want to make use of EReference.eKeys
> so that the containment reference itself declares which combination of
> attributes in the referenced class are unique within the context of a
> single containment list.

Thanks for the advice, it is what I need.

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