[news.eclipse.modeling.mdt.uml2] Re: DerivedSubsetEList won't be generat

[Kenn Hussey <Kenn.Hussey@xxxxxxxxx>]

Timothy,

I think it is reasonable to expect that this case be automatically 
supported by the generator, but in fact the subsets constraint (alone) 
in UML doesn't provide enough information to do so - there's nothing 
about a subsets constraint that indicates _how_ elements are chosen to 
be part of the subset. In many (most?) cases, if both the superset and 
subset properties are composite, the subset is probably just a type 
restriction (as it is in this case), but I'm not sure how safe this 
assumption is in general...

Kenn

Timothy Marc wrote:
> Kenn,
>
> of course... again, i refer to the Package::ownedTypes containment of 
> Figure 7.14 in the UML2 spec.
>
> When i generate the corresponding code, it looks like this:
>
> public EList<Type> getOwnedTypes() {
>     // TODO: implement this method to return the 'Owned Type' reference 
> list
>     // Ensure that you remove @generated or mark it @generated NOT
>     throw new UnsupportedOperationException();
> }
>
> but it should look like this:
>
> public EList<Type> getOwnedTypes() {
>     return new DerivedSubsetEObjectEList<Type>(Type.class, 
> this,          TestingPackage.PACKAGE__OWNED_TYPE, OWNED_TYPE_ESUPERSETS);
> }
>
> Well, it was not hard to implement this if you understand how the UML 
> list framework works, but i was wondering, why the generator is not 
> capable to generate it. Almost any information, that is necessary, is 
> avialable in the model, i think.
>
> Thx
> Timothy
>
>
> Kenn Hussey schrieb:
> > Timothy,
> >
> > I'm afraid you'll have to provide a bit more detail about your model 
> > in order for us to help. What do you mean by "manually defining the 
> > relation"?
> >
> > Note that code using derived subset lists will generally only be 
> > generated if the subset is derived and the option to process subsets 
> > is turned on in the wizard...
> >
> > Kenn
> >
> > Timothy Marc wrote:
> > > Hi all,
> > >
> > > i'm using the UML2 genmodel to generate an Ecore model, which is 
> > > aware of the UML2 subsets mechanism. This works well for the most 
> > > parts of my model, but i was wondering why a derived subset wasn't 
> > > generate the DerivedSubsetEList. By manually defining the relation, 
> > > it works as expected, but it won't be generated.
> > > Is this the intended behavior?
> > >
> > > Thanks
> > > {Timothy}