How do I attach arbitrary data to a GNode?

[midrare]

Lets say that I have some extra data that I want to display in my custom GNodeSkin. From what I understand of the wiki page, this would be done by creating a new EMF model, and then creating a new EClass with the extra attributes needed. Whenever a new node of that extended type is needed, both a GNode and a MyExtendedGNode are instantiated, with the same ID, and both are added to the GModel.

But then how does the custom GNodeSkin get access to the MyExtendedGNode instance? Do I use the GNode to look up the MyExtendedGNode instance? Where do I do this? Do I do this in the skin factory? Is there a function I can call such as getMyExtendedGNodeById(String id), or do I manually keep a Map<String, MyExtendedGNode> that acts as an index for the extra attributes? I'm confused. What is the recommended approach? (Or am I going about this entirely the wrong way?)

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[eckig]

The GNode is added to the GModel but your MyExtendedGNode needs to be added to the MyExtendedGModel (4.2 in the wiki).

In the GNodeSkin you can access the GModel with getGraphEditor().getModel() and from that you can retrieve your custom Model (via the editing domain).

If you frequently do this kind of a query, you should cache the value somehow, but that is up to you.