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| Re: [Xcore] Adding new super class to all classes in an EMF model [message #1695175 is a reply to message #1695173] |
Tue, 12 May 2015 13:38   |
 Ed Merks
Messages: 30351
Registered: July 2009 |
Senior Member |
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Daniel,
Comments below.
On 12/05/2015 3:26 PM, Daniel K. wrote:
> Hi,
> currently I have a problem to find an easy way to modify an existing
> model.
> We have different defined models based on EMF (Xcore).
> Now a requirement is to add to all elements of a model attributes.
> Therefore we already have defined an interface containing those.
> Sample:
> interface SampleA
> {
> contains resolving MyAttribute [] myAttribute
> }
>
> Goal is that all defined classes are having these myAttribute
> available, if possible without explicit extending it, as the model is
> very large and we have to touch a lot of elements.
No, this is impossible.
>
> First idea was to add the base class and its provider to the Genmodel
> annotation:
> @GenModel(
> .. rootExtendsClass="package.myclass",
> providerRootExtendsClass="package.myclassprovider)
>
> Problem with that solution is that I'm able to see the entry in the
> editor, but I'm not able to use it. It's greyed out.
Which editor? These things should be fully qualified names of classes,
but a root extends class must be a class like EObjectImpl without any
explicitly modeled features.
>
> Is there something missing or another simple way existing to achieve
> such a constellation?
No, if you want modeled features they must be explicitly known in the
Ecore model itself and hence must be explicit in the Xcore model.
> Fallback would be to add to all elements the extend SampleA...
It's the only way.
>
> Regards
> Daniel
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