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How do I determine if a class has no one inhereting from it? [message #695753]

Tue, 12 July 2011 09:39

David Sauter
Messages: 6
Registered: July 2011

Junior Member

I've got a rather large and sweeping set of models that I have to combine into a single coherent autogenerator. The issue I'm running across is that I need to determine if a class has no one inhereting from it or not as there's different generation steps that have to be done if a class has children.

Is there an easy way to do this with OCL in an ECore environment?

David Sauter

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Re: How do I determine if a class has no one inhereting from it? [message #695762 is a reply to message #695753]

Tue, 12 July 2011 09:57

st oehm
Messages: 79
Registered: October 2009

Member

hallo david
normally a class does not know, something about its subclasses
i had a similiar problem. i wanted to get all childs from a class
an ocl-expression like this should work
self.getModel().allOwnedElements().oclIsTypeOf(Generalization)->select(e|e.general()=self).owner
then you should get all subclasses of an class
this only work if your rootElement is a model
mabe that helps you

greetings stoehm

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(no subject) [message #695843 is a reply to message #695753]

Tue, 12 July 2011 11:54

Ed Willink
Messages: 3165
Registered: July 2009

Senior Member

Hi David

When necessary allInstances() is useful for finding everything. So get
all classes then filter all superClasses thereof.

Regards

Ed Willink

On 12/07/2011 14:39, David Sauter wrote:
> I've got a rather large and sweeping set of models that I have to
> combine into a single coherent autogenerator. The issue I'm running
> across is that I need to determine if a class has no one inhereting
> from it or not as there's different generation steps that have to be
> done if a class has children.
>
> Is there an easy way to do this with OCL in an ECore environment?
>
> David Sauter

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Re: How do I determine if a class has no one inhereting from it? [message #695844 is a reply to message #695762]

Tue, 12 July 2011 12:28

David Sauter
Messages: 6
Registered: July 2011

Junior Member

That did it though I did have to make some changes for ECore syntax.

self.eAllContents(EClass)->select(e : EClass| e.eAllSuperTypes->any(e.name = self.name)->size() > 0)

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Re: How do I determine if a class has no one inhereting from it? [message #697192 is a reply to message #695844]

Fri, 15 July 2011 14:24

David Sauter
Messages: 6
Registered: July 2011

Junior Member

and it turns out you need to go get the root...

[query public isFinal(a : EClass) : Boolean = if
(
invoke('org.eclipse.emf.ecore.util.EcoreUtil', 
'getRootContainer(org.eclipse.emf.ecore.EObject)', Sequence{a.eSuperTypes->first()}).eAllContents(EClass)->select(b : EClass | a.isSuperTypeOf(b))->size() = 1
)
then true else false endif /]

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