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Trying to define Relation Based Edges [message #1832652]

Tue, 22 September 2020 14:50

Eclipse User

Hello all,

I am trying to define a relation based edge for my project for class A. The target of the relation can be class B or class C. How can I define in the target finder expression an 'or' expression so that I don't have to change my ecore metamodel in order to implement this reference? I am trying to learn AQL in order to do it but it is not very clear how I can do this. Any help would be greatly appreciated!

[Updated on: Wed, 23 September 2020 16:14] by Moderator

Re: Trying to define Relation Based Edges [message #1832755 is a reply to message #1832652]

Thu, 24 September 2020 08:50

Eclipse User

Hello Thomas,

You have 2 options to do this. The first is to modify you ecore metamodel and define a super Class for B and C.
If you don't want modify your metamodel you can create a query that allow to find the target from the source. A request as for example aql:self.myrelationB or self.myRelationC where self correspond to the source and myRelationD correspond to relation return B.

Regards,

Re: Trying to define Relation Based Edges [message #1832941 is a reply to message #1832755]

Tue, 29 September 2020 12:46

Eclipse User

Thanks! I ended up just changing the metamodel to make things easier as I couldn't get a query to work the way I wanted it to.

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