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Path through an EMF graph [message #1774187]

Wed, 11 October 2017 12:56

Geoffry Roberts

Messages: 16
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: 32823
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...

Ed Merks
Professional Support: https://www.macromodeling.com/

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