Eclipse Community Forums: TMF (Xtext) » Importing in a grammar an external metamodel depending on another metamodel

Help

Home

Home » Modeling » TMF (Xtext) » Importing in a grammar an external metamodel depending on another metamodel

Show: Today's Messages :: Show Polls :: Message Navigator

Importing in a grammar an external metamodel depending on another metamodel [message #636728]

Tue, 02 November 2010 15:15

Steven Derrien

Messages: 50
Registered: July 2009

Member

Hi,

After being able to import an external metamodel containing several EPackage in my grammar, I
am facing another problem, related to the fact that my metamodel definitions (A.ecore) uses
another metamodel (B.ecore) as some EClass in A extend some EClass in B.

To make sure that the MWE2 workflow can find the corresponding EPackages, I used the following
lines in my mwe2 workflow.

fragment = ecore.EcoreGeneratorFragment {
referencedGenModels = " platform:/resource/projectA/model/A.genmodel,platform:/resou rce/projectB/model/B.genmodel "
}

Which leads to the following error during the workflow execution

java.lang.NullPointerException
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.set ImportManager(GenModelImpl.java:2136)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.set ImportManager(GenModelImpl.java:2136)

I also tried with

fragment = ecore.EcoreGeneratorFragment {
referencedGenModels = "platform:/resource/projectA/model/A.genmodel"
referencedGenModels = "platform:/resource/projectB/model/B.genmodel"
}

Which then leads to the following error during the workflow execution

java.lang.NullPointerException
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenBaseImpl.find GenPackageHelper(GenBaseImpl.java:870)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.fin dGenPackage(GenModelImpl.java:1839)

PS: Because of some preexisting code base, I cannot generate a single genmodel implementing A and B as a
workaround.

Steven

Report message to a moderator