Bug 363929

Description Seref Arikan 2011-11-16 10:49:59 EST

Build Identifier:  M20110210-1200

When an Xtext project is created based on an existing Ecore model, the wizard allows giving names to project and to language that is going to be created. If one chooses a name like SomeLang, without any namespace, the resulting project fails to run as mwe2 workflow. Under Windows 7 64 with Java 1.6 and Eclipse Helios, the console output is as follows: 

2614 [main] INFO ipse.xtext.generator.LanguageConfig - generating infrastructure for Archelang with fragments : ImplicitRuntimeFragment, ImplicitUiFragment, GrammarAccessFragment, ParseTreeConstructorFragment, ResourceFactoryFragment, XtextAntlrGeneratorFragment, Ecore2XtextValueConverterServiceFragment, JavaValidatorFragment, ImportURIScopingFragment, SimpleNamesFragment, FormatterFragment, LabelProviderFragment, OutlineTreeProviderFragment, QuickOutlineFragment, JavaBasedContentAssistFragment, XtextAntlrUiGeneratorFragment, CompareFragment, BuilderIntegrationFragment, QuickfixProviderFragment
23915 [main] INFO or.validation.JavaValidatorFragment - generating Java-based EValidator API
33923 [main] INFO text.generator.junit.Junit4Fragment - generating Compare Framework infrastructure
33981 [main] ERROR g.eclipse.xtext.generator.Generator - java.lang.NullPointerException
org.eclipse.emf.common.util.WrappedException: java.lang.NullPointerException
at org.eclipse.xtext.generator.Generator.mergeManifest(Generator.java:408)
at org.eclipse.xtext.generator.Generator.generateManifestRt(Generator.java:375)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:134)
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:97)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:73)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:64)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:55)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
Caused by: java.lang.NullPointerException
at org.eclipse.xtext.generator.MergeableManifest.mergeIntoCommaSeparatedList(MergeableManifest.java:306)
at org.eclipse.xtext.generator.MergeableManifest.addExportedPackages(MergeableManifest.java:257)
at org.eclipse.xtext.generator.Generator.mergeManifest(Generator.java:396)
... 13 more
33982 [main] INFO .emf.mwe2.runtime.workflow.Workflow - Done.

There is no warning that this is related to namespace not being present. The same behavior happens in Indigo too.

Reproducible: Always

Steps to Reproduce:
1.Create an ECore project (I've done via an existing XML Schema)
2.Generate code for Ecore project
3. Create an Xtext project using the ecore project
4. Give the name SomeLang or any other Single word name to the language in the nex Xtext project wizard
5. Run the generated project via Run as Mwe2 workflow.