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Derived Relations in Ecore [message #1859078]

Wed, 10 May 2023 15:06

Issam Al-Azzoni is currently offline

Issam Al-Azzoni

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Messages: 7
Registered: June 2022

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In the basicfamily example, a person can have a father and a mother. Both properties are derived. In addition, there are also parents and children properties. What I do not understand is the following scenario:
There is a person named John. Alex and Joanne are the parents of John. When using a model editor, why is Alex set as the father of John and Joanne as the mother. There is nothing in the ecore file defining this relationship.

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Re: Derived Relations in Ecore [message #1859481 is a reply to message #1859078]

Fri, 09 June 2023 19:07

Pierre-Charles David is currently offline

Pierre-Charles David

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Messages: 703
Registered: July 2009

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You're right that there is nothing in the Ecore itself.
It's defined directly in the Java implementation through custom "@generated NOT" versions of "getMother", "setMother", "getFather" and "setFather".
You can see the code here: https://github.com/pcdavid/org.eclipse.sirius/blob/master/plugins/org.eclipse.sirius.samples.family/samples/org.eclipse.sirius.sample.basicfamily/src/org/eclipse/sirius/sample/basicfamily/impl/PersonImpl.java#L187

Pierre-Charles David - Obeo

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http://www.obeodesigner.com/sirius

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