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[EVL] Access to parent node [message #1274064]

Fri, 21 March 2014 00:05

Johnny Soab

Messages: 1
Registered: March 2014

Junior Member

Hi,

I have a simple metamodel defined as follows:

class Model {
  val Root[1] root;
}

class Node {
  attr String name;
  val Child[*] childs;
}

class Root extends Node {
}

class Child {
}

class Mand extends Node, Child {
}

I can therefore create two nodes with a reference between them. How can I, with two nodes between them through EVL, access to the parent node? I tried "Node.self" but it gives me error.. is there any way?

Thank you!

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Re: [EVL] Access to parent node [message #1274414 is a reply to message #1274064]

Fri, 21 March 2014 12:42

Dimitris Kolovos

Messages: 1520
Registered: July 2009
Location: York, UK

Senior Member

Hi Johny,

The quick and dirty way is to use EMF's eContainer() operation (i.e. self.eContainer()). The proper way is to define an opposite reference in your metamodel e.g.

class Node {
attr String name;
val Child[*]#parent children;
ref Child#children parent;
}

Cheers,
Dimitris

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