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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » How to create a copy of an EObject with non-null Resource
How to create a copy of an EObject with non-null Resource [message #618948] Sat, 24 May 2008 16:15
Lars Schneider is currently offline Lars SchneiderFriend
Messages: 50
Registered: July 2009
I have a little problem using EcoreUtil.copy(EObject) because the
eResource() of that copy returns null.

More precisely I want to copy the root of a model, change it and compare
it to the original with EMF Compare. I think the following code snippet
explains it best:

EObject copy = EcoreUtil.copy(original);
Transformation trans = new Transformation(copy);
trans.transform(); // changes copy
MatchModel match = null;
try {
match = MatchService.doMatch(original, copy
Collections.<String, Object> emptyMap());
} catch (InterruptedException e) {

The problem is that doMatch(...) ends up in a NullPointerException
because the resource of copy is null. Does anyone have an idea how to
solve this problem? I think I can either set the resource manually or
get another IMatchEngine implementation. But I don't know how to.
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