| Null-Pointer-Exception in EMFGeneratorFragment [message #1265856] |
Thu, 06 March 2014 16:50  |
 Reiner Jung
Messages: 9
Registered: June 2010
Location: Uni Kiel |
Junior Member |
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Hi folks,
presently, or more precise for days, a NullPointerException in a MWE2 workflow is bugging me. It is originating in the EMFGeneratorFragment.
I am trying to fix this issue now for a couple of days and I cannot find a solution. This problem looks similar to http://www.eclipse.org/forums/index.php/t/457644/. However, the proposed solution of modifying the ecore model is not feasible and the uri mapping option is already in place.
The setup is as follows: I have, for test purposes, made a very small language PCMXtext which includes a reference to a Palladio component model (PCM) node.
Object:
'obj' name=ID
reference=[repository::BasicComponent]
';'
;
The repository meta-model is imported with
import "http //sdq.ipd.uka.de/PalladioComponentModel/Repository/5.0" as repository
(The missing : in the URI is not an error, but a method circumvent the forums ill assumption that I want to post an URL to some external website. The real code includes that colon.)
During the MWE2 workflow a lot of GenModels are registered and it all looks fine. However, during EMFGeneratorFragment execution, the whole thing comes apart with a NullPointerException
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.hasExtendedMetaData(GenPackageImpl.java:4404)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenPackageImpl.initialize(GenPackageImpl.java:2815)
at org.eclipse.emf.codegen.ecore.genmodel.impl.GenModelImpl.initialize(GenModelImpl.java:2386)
at org.eclipse.xtext.generator.ecore.EMFGeneratorFragment.getSaveAndReconcileGenModel(EMFGeneratorFragment.java:713)
at org.eclipse.xtext.generator.ecore.EMFGeneratorFragment.generate(EMFGeneratorFragment.java:234)
at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:92)
at org.eclipse.xtext.generator.LanguageConfig.generate(LanguageConfig.java:113)
at org.eclipse.xtext.generator.Generator.generate(Generator.java:366)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:132)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
I looks like, a proxy object is not resolved properly and a null pointer is returned instead. However, I could be wrong, as the debugging is a really cumbersome process due to the large number of involved references.
I have attached the workflow, the grammar, the console.log, and the present MANIFEST.MF. There might be more packages listed than necessary in the MANIFEST due to my "fixing" efforts.
Any ideas and suggestions to solve this issue are welcome.
Thanks
Reiner
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