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References in multiple ecores using . giving exception [message #418044]

Thu, 03 April 2008 15:16

Eclipse User

Originally posted by: hkumar.agrawal.gmail.com

Hi,

We have a functionality where we generate multiple ecores with one ecore referring the other. The ecores are loaded fine into the resource set. If the reference has a relative path (i.e. of the form ./second.ecore#//second) then we get the following exception while generating the genmodel (during its initialization):

java.lang.NullPointerException
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.h asExtendedMetaData(GenPackageImpl.java:3984)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.i nitialize(GenPackageImpl.java:2473)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.ini tialize(GenModelImpl.java:1927)

Digging a bit into the code, we run into a TreeIterator which was difficult to follow after a point !

Note that if we change the reference to be an absolute project path (i.e. /project/folder/second.ecore#//second) then the error goes away and everything is fine.

Is there something that we are missing here ? Do we have set some property during the generation / initialization of the genmodel ?

Thanks in advance.

-Hemant

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Re: References in multiple ecores using . giving exception [message #418046 is a reply to message #418044]

Thu, 03 April 2008 15:29

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Hemant,

You should use platform:/resource/project/whatever.genmodel to load your
resource, not "/project/whatever.genmodel", otherwise all relative URIs
won't resolve properly. I.e., it's best to use
URI.createPlatformResourceURI when creating a URI for something in the
workspace.

Hemant wrote:
> Hi,
>
> We have a functionality where we generate multiple ecores with one ecore referring the other. The ecores are loaded fine into the resource set. If the reference has a relative path (i.e. of the form ./second.ecore#//second) then we get the following exception while generating the genmodel (during its initialization):
>
> java.lang.NullPointerException
> at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.h asExtendedMetaData(GenPackageImpl.java:3984)
> at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.i nitialize(GenPackageImpl.java:2473)
> at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.ini tialize(GenModelImpl.java:1927)
>
> Digging a bit into the code, we run into a TreeIterator which was difficult to follow after a point !
>
> Note that if we change the reference to be an absolute project path (i.e. /project/folder/second.ecore#//second) then the error goes away and everything is fine.
>
> Is there something that we are missing here ? Do we have set some property during the generation / initialization of the genmodel ?
>
> Thanks in advance.
>
> -Hemant
>

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

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