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Understanding Etypes for attribute in Ecore [message #1837143]

Fri, 22 January 2021 16:28

Thomas Chiang

Messages: 100
Registered: March 2020

Senior Member

I am trying to understand how to set up dependencies so that I can introduce OCL as a type into my editor so that the type of an attribute for a class would be of type OCL. I am going through the available types and I am trying to understand what some of them are.

index.php/fa/39806/0/

Can I use the Gen* types here in order to set up that dependency? Or the EResource ones? Or is there another type that I should be using entirely?

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Re: Understanding Etypes for attribute in Ecore [message #1837154 is a reply to message #1837143]

Fri, 22 January 2021 20:36

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

You need to explain EXACTLY what you are trying to do, with a very clear use case examples.

I would expect that a full integration of OCL into another language would take me at least a couple of months and I have a fair idea of what I'm doing.

However if you want something much more modest analogous to Papyrus' support for OCL embedded via an OpaqueExpression as a text String in a UML model, then something much more modest may be tractable.

If you want something a bit stronger than String, you might go for ExpressionInOCL/LanguageExpression (making sure you use the Pivot OCL for which ExpressionInOCL has more comprehensive interface capabilities.)

Regards

Ed Willink

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