Comment 1 Sven Efftinge 2011-10-20 09:10:00 EDT

With this source file:



package org.xtext.example.mydsl.jvmmodel

import com.google.inject.Inject
import org.eclipse.emf.ecore.EObject
import org.eclipse.xtext.common.types.JvmDeclaredType
import org.eclipse.xtext.common.types.JvmExecutable
import org.eclipse.xtext.util.IAcceptor
import org.eclipse.xtext.xbase.XExpression
import org.eclipse.xtext.xbase.jvmmodel.AbstractModelInferrer
import org.eclipse.xtext.xbase.jvmmodel.JvmTypesBuilder
import org.xtext.example.mydsl.myDsl.Entity
import org.xtext.example.mydsl.myDsl.Operation
import org.xtext.example.mydsl.myDsl.PackageDeclaration
import org.xtext.example.mydsl.myDsl.Property

/**
 * <p>Infers a JVM model from the source model.</p> 
 *
 * <p>The JVM model should contain all elements that would appear in the Java code 
 * which is generated from the source model. Other models link against the JVM model rather than the source model.</p>     
 */
class MyDslJvmModelInferrer extends AbstractModelInferrer {

    /**
     * conveninence API to build and initialize JvmTypes and their members.
     */
	@Inject extension JvmTypesBuilder
	
	def void setBody(JvmExecutable it, XExpression expression) {
		expression.isLogicallyContainedIn(it)
	}

	/**
	 * Is called for each instance of the first argument's type contained in a resource.
	 * 
	 * @param element - the model to create one or more JvmDeclaredTypes from.
	 * @param acceptor - each created JvmDeclaredType without a container should be passed to the acceptor in order get attached to the
	 *                   current resource.
	 * @param isPreLinkingPhase - whether the method is called in a pre linking üphase, i.e. when the global index isn't fully updated. You
	 *        must not rely on linking using the index if iPrelinkingPhase is <code>true</code>
	 */
   	def dispatch void infer(Entity element, IAcceptor<JvmDeclaredType> acceptor, boolean isPrelinkingPhase) {
   		
   		acceptor.accept(element.toClass(element.qualifiedName) [
   			for (feature : element.features) {
   				switch feature {
   					Property : {
   						
   					}
   					Operation : {
		   				it.members += feature.toMethod(feature.name, feature.newTypeRef(typeof(String))) [
		   					body = feature.body
						]
   					}
   				}
   			}
   		])
   	}
   	
   	def String qualifiedName(EObject element) {
   		switch element {
   			Entity case element.eContainer != null : 
   				qualifiedName(element.eContainer)+"."+element.name
   			Entity : 
   				element.name
   			PackageDeclaration case element.eContainer != null :
   				qualifiedName(element.eContainer)+"."+element.name
   			PackageDeclaration :
   				element.name
   		}
   	}
}

Comment 2 Holger Schill 2011-11-23 05:18:09 EST

I have a Nullpointer for this file during scoping.

239171 [Worker-7] ERROR org.eclipse.xtext.xbase.scoping.XbaseScopeProvider  - error during scoping
java.lang.NullPointerException
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:61)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector$Implementation.caseJvmDelegateTypeReference(SuperTypeCollector.java:222)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector$Implementation.caseJvmDelegateTypeReference(SuperTypeCollector.java:1)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:510)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:75)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:61)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector$Implementation.caseJvmMultiTypeReference(SuperTypeCollector.java:211)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector$Implementation.caseJvmMultiTypeReference(SuperTypeCollector.java:1)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:306)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:75)
	at org.eclipse.xtext.common.types.util.TypesSwitch.doSwitch(TypesSwitch.java:61)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector.doCollectSupertypeData(SuperTypeCollector.java:137)
	at org.eclipse.xtext.common.types.util.SuperTypeCollector.collectSuperTypes(SuperTypeCollector.java:87)
	at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider.linearizeTypeHierarchy(JvmFeatureScopeProvider.java:159)
	at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider.createFeatureScopeForTypeRef(JvmFeatureScopeProvider.java:109)
	at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider.createFeatureScope(JvmFeatureScopeProvider.java:73)
	at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider$JvmFeatureScopeAcceptor.createScope(XbaseScopeProvider.java:739)
	at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createFeatureScopeForTypeRef(XbaseScopeProvider.java:372)
	at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createFeatureCallScopeForReceiver(XbaseScopeProvider.java:394)
	at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createFeatureCallScope(XbaseScopeProvider.java:327)
	at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.getScope(XbaseScopeProvider.java:181)
	at org.eclipse.xtext.xbase.annotations.scoping.XbaseWithAnnotationsScopeProvider.getScope(XbaseWithAnnotationsScopeProvider.java:50)
	at org.eclipse.xtext.xbase.linking.XbaseLinkingScopeProvider.getScope(XbaseLinkingScopeProvider.java:42)
	at org.eclipse.xtext.linking.impl.DefaultLinkingService.getScope(DefaultLinkingService.java:59)
	at org.eclipse.xtext.linking.impl.DefaultLinkingService.getLinkedObjects(DefaultLinkingService.java:119)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:175)
	at org.eclipse.xtext.xbase.resource.XbaseResource.access$0(XbaseResource.java:1)
	at org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(XbaseResource.java:227)
	at org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(XbaseResource.java:1)
	at org.eclipse.xtext.util.OnChangeEvictingCache.execWithoutCacheClear(OnChangeEvictingCache.java:121)
	at org.eclipse.xtext.xbase.resource.XbaseResource.getEObject(XbaseResource.java:225)
	at org.eclipse.xtext.xtend2.resource.Xtend2Resource.getEObject(Xtend2Resource.java:88)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:219)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:202)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:262)
	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1475)
	at org.eclipse.xtext.xbase.impl.XAbstractFeatureCallImpl.getFeature(XAbstractFeatureCallImpl.java:161)
	at org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator.computeFeatureCallHighlighting(XbaseHighlightingCalculator.java:149)
	at org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator.searchAndHighlightElements(XbaseHighlightingCalculator.java:115)
	at org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator.doProvideHighlightingFor(XbaseHighlightingCalculator.java:107)
	at org.eclipse.xtext.xtend2.ui.highlighting.XtendHighlightingCalculator.doProvideHighlightingFor(XtendHighlightingCalculator.java:93)
	at org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator.provideHighlightingFor(XbaseHighlightingCalculator.java:87)
	at org.eclipse.xtext.ui.editor.syntaxcoloring.MergingHighlightedPositionAcceptor.provideHighlightingFor(MergingHighlightedPositionAcceptor.java:51)
	at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.reconcilePositions(HighlightingReconciler.java:87)
	at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.modelChanged(HighlightingReconciler.java:277)
	at org.eclipse.xtext.ui.editor.model.XtextDocument.notifyModelListeners(XtextDocument.java:118)
	at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.afterModify(XtextDocument.java:172)
	at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.afterModify(XtextDocument.java:1)
	at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.modify(AbstractReadWriteAcces.java:50)
	at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:181)
	at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:90)
	at org.eclipse.xtext.ui.editor.reconciler.XtextDocumentReconcileStrategy.reconcile(XtextDocumentReconcileStrategy.java:33)
	at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.run(XtextReconciler.java:239)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Comment 3 Sven Efftinge 2012-04-11 08:59:20 EDT

Added NPE guard for comment #3. stack trace from comment #1 is outdated and can't happen anymore. pushed to master.

Comment 4 Eclipse Webmaster 2017-10-31 10:47:16 EDT

Requested via bug 522520.

-M.

Comment 5 Eclipse Webmaster 2017-10-31 10:58:24 EDT

Requested via bug 522520.

-M.