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Ecore - inherited derived attributes [message #1838761]

Thu, 04 March 2021 16:47

Francesco Bedini

Messages: 32
Registered: March 2018

Member

I am trying to create a metamodel for logical expressions:
index.php/fa/40080/0/

Is there a way to define those inherited "output" derived attributes?
Should they rather be operations?

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Re: Ecore - inherited derived attributes [message #1838768 is a reply to message #1838761]

Thu, 04 March 2021 18:43

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

In UML, yes. Only Operations are polymorphic.

In Ecore, probably. If you're lucky you can exploit the Java implementation as getOutput() to achieve polymorphism, but IIRC you need to do a bit of manual fixing up.

Much easier to use operations.

Regards

Ed Willink

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Re: Ecore - inherited derived attributes [message #1838790 is a reply to message #1838768]

Fri, 05 March 2021 06:28

Ed Merks

Messages: 33133
Registered: July 2009

Senior Member

Certainly in the Java implementation classes you can override the methods, and in the Ecore model you can define an operation that has the same signature as the generated getter for the feature to "override" it.

Ed Merks
Professional Support: https://www.macromodeling.com/

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