| Maven project fails during model validation [message #1816272] |
Fri, 25 October 2019 01:30  |
Eclipse User |
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Hello,
I'm facing a problem when running the xtext maven plugin.
I will provide the minimal setup for reproducing the error.
DatamodelDsl.xtext
Context:
'context' name=CTXT_FQN ('extends' parentContext=[Context|CTXT_FQN] )? ;
terminal CTXT_FQN:
ID '-' VERSION ;
DatamodelDslScopeProvider.xtend
class DatamodelDslScopeProvider extends AbstractDatamodelDslScopeProvider {
@Inject
IResourceDescriptions resourceDescriptions;
@Inject
Provider<XtextResourceSet> resourceSetProvider;
val ePackage = DatamodelDslPackage.eINSTANCE;
override getScope(EObject context, EReference reference){
if(reference == ePackage.context_ParentContext && context instanceof Context){
val currentContext = context as Context
return scopeForParentContext(currentContext, context, reference)
}
return super.getScope(context,reference)
}
def protected IScope scopeForParentContext(Context currentContext, EObject context, EReference reference) {
val List<Context> contexts = newArrayList;
if(resourceDescriptions!==null && !resourceDescriptions.empty) {
val descriptions = resourceDescriptions.getExportedObjectsByType(ePackage.context);
if(!descriptions.empty){
for(IEObjectDescription description: resourceDescriptions.getExportedObjectsByType(ePackage.context)){
var Resource resource = resourceSetProvider.get.getResource(description.EObjectURI, true)
var contextInstance = resource.allContents.filter(Context).head
contexts.add(contextInstance)
}
return Scopes::scopeFor(contexts, [QualifiedName.create((it as Context).name.split("\\."))],IScope.NULLSCOPE);
}
} else {
return super.getScope(context,reference)
}
}
}
pom.xml
<plugin>
<groupId>org.eclipse.xtext</groupId>
<artifactId>xtext-maven-plugin</artifactId>
<version>${xtext.version}</version>
<executions>
<execution>
<id>compile-wkfs</id>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<configuration>
<languages>
<language>
<setup>com.wkfsfrc.rr.tools.ruledesigner.datamodel.DatamodelDslStandaloneSetup</setup>
<outputConfigurations>
<outputConfiguration>
<outputDirectory>${project.basedir}/src-gen/main/resources</outputDirectory>
</outputConfiguration>
</outputConfigurations>
</language>
</languages>
</configuration>
</plugin>
The two model examples:
myTest.datamodel
context Base_Context-1.0.0
myTest2.datamodel
context Another_Context-1.0.0 extends Base_Context-1.0.0
The error that I'm getting:
[INFO] --- xtext-maven-plugin:2.17.1:generate (compile-wkfs) @ local-calcParentName-model ---
[INFO] Encoding: UTF-8
[INFO] Compiler source level: 1.8
[INFO] Compiler target level: 1.8
[INFO] Using common types.
[INFO] Collecting source models.
[INFO] Installing type provider.
[INFO] Generating stubs into C:\Work\Rules Designer Builds\local 24.10\workspace\ex\local-calcParentName\local-calcParentName-model\target\xtext-temp\stubs
[INFO] Compiling stubs located in C:\Work\Rules Designer Builds\local 24.10\workspace\ex\local-calcParentName\local-calcParentName-model\target\xtext-temp\stubs
[INFO] Installing type provider for stubs.
[INFO] Starting validation for input: 'myTest.datamodel'
[ERROR] resolution of uriFragment '|0' failed.
java.lang.NullPointerException
at org.eclipse.xtext.resource.impl.ResourceSetBasedResourceDescriptions.isEmpty(ResourceSetBasedResourceDescriptions.java:92)
at com.wkfsfrc.rr.tools.ruledesigner.datamodel.scoping.DatamodelDslScopeProvider.scopeForParentContext(DatamodelDslScopeProvider.java:74)
at com.wkfsfrc.rr.tools.ruledesigner.datamodel.scoping.DatamodelDslScopeProvider.getScope(DatamodelDslScopeProvider.java:54)
at org.eclipse.xtext.linking.impl.DefaultLinkingService.getScope(DefaultLinkingService.java:58)
at org.eclipse.xtext.linking.impl.DefaultLinkingService.getLinkedObjects(DefaultLinkingService.java:107)
at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:265)
at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:236)
at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:203)
at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:162)
at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:148)
at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:504)
at org.eclipse.xtext.builder.standalone.StandaloneBuilder.launch(StandaloneBuilder.java:266)
at org.eclipse.xtext.maven.XtextGenerator.internalExecute(XtextGenerator.java:184)
at org.eclipse.xtext.maven.XtextGenerator.execute(XtextGenerator.java:161)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
The error is definitely caused by the code from scopeForParentContext, since when I'm not setting any parentContext everything works fine.
The reason for which it is like this implemented is because I want to be able to set as parentContext any context that is defined in the Eclipse workspace, no matter on which project belongs to.
I also tried calling code from Java which was collecting all the contexts from the workspace, but I ended up with a 'Workspace is closed' error.
So, the main goal is to be able to setup a parentContext which belong to any project from the workspace. Maybe there is another way to achieve that.
Any suggestion is more that welcomed. :)
Thank you!
Kind Regards,
Alexandra
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