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Path through an EMF graph [message #1774187]

Wed, 11 October 2017 12:56

Geoffry Roberts

Messages: 12
Registered: May 2014

Junior Member

All,

I need an EMF equivalent to XPath. i.e. A string that points to a value inside an EMF object graph. I need to--starting with an EObject, EAttribute, or EReference; which might be well nested--get the string I mentioned (a path reaching up container by container to the top, containing object) and vice versa. i.e. Starting with the string, navigating down to a object and updating an attribute(s).

Clearly, I can roll my own, but I would prefer to use something more standardized if such a thing exists.

Is there any such thing?

I realize one can always go from EMF to XML then hit it with XPath, but that's jumping through too many hoops.

Thanks

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Re: Path through an EMF graph [message #1774307 is a reply to message #1774187]

Thu, 12 October 2017 14:23

Ed Merks

Messages: 30819
Registered: July 2009

Senior Member

There are org.eclipse.emf.ecore.InternalEObject.eURIFragmentSegment(EStructuralFeature, EObject) and org.eclipse.emf.ecore.InternalEObject.eObjectForURIFragmentSegment(String) for creating path segments and traversing path segments, so an extension of that idea would allow the final segment to refer to an attribute's value and return it...

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