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Build Identifier: 2.0.0 It is impossible to access references from within an IQualifiedNameProvider Having this simple Grammar grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals generate myDsl "http://www.xtext.org/example/mydsl/MyDsl" Model: entities+=Entity* usages+=Usage* ; Entity: "entity" name=ID ; Usage: "usage" entity=[Entity] ; and this simple nameprovider public class MyDslNameProvider extends DefaultDeclarativeQualifiedNameProvider { QualifiedName qualifiedName(Usage u) { return QualifiedName.create(u.getEntity().getName()); } } i get java.lang.AssertionError: Cyclic resolution of lazy links : Usage.entity->Usage.entity at org.eclipse.xtext.linking.lazy.LazyLinkingResource.handleCyclicResolution(LazyLinkingResource.java:206) at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:159) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:219) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:203) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:263) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1483) at org.xtext.example.mydsl.myDsl.impl.UsageImpl.getEntity(UsageImpl.java:77) at org.xtext.example.mydsl.naming.MyDslNameProvider.qualifiedName(MyDslNameProvider.java:10) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider$2.get(DefaultDeclarativeQualifiedNameProvider.java:62) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider$2.get(DefaultDeclarativeQualifiedNameProvider.java:1) at org.eclipse.xtext.util.OnChangeEvictingCache.get(OnChangeEvictingCache.java:46) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider.getFullyQualifiedName(DefaultDeclarativeQualifiedNameProvider.java:58) at org.eclipse.xtext.naming.IQualifiedNameProvider$AbstractImpl.apply(IQualifiedNameProvider.java:31) at org.eclipse.xtext.naming.IQualifiedNameProvider$AbstractImpl.apply(IQualifiedNameProvider.java:1) at org.eclipse.xtext.scoping.Scopes$2.apply(Scopes.java:90) at org.eclipse.xtext.scoping.Scopes$2.apply(Scopes.java:1) at com.google.common.collect.Iterators$8.next(Iterators.java:697) at com.google.common.collect.Iterators$7.computeNext(Iterators.java:602) at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:135) at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:130) at org.eclipse.xtext.scoping.impl.MultimapBasedSelectable.setExportedObjects(MultimapBasedSelectable.java:97) at org.eclipse.xtext.scoping.impl.MultimapBasedSelectable.<init>(MultimapBasedSelectable.java:36) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.internalGetAllDescriptions(ImportedNamespaceAwareLocalScopeProvider.java:216) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider$2.get(ImportedNamespaceAwareLocalScopeProvider.java:204) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider$2.get(ImportedNamespaceAwareLocalScopeProvider.java:1) at org.eclipse.xtext.util.OnChangeEvictingCache.get(OnChangeEvictingCache.java:46) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getAllDescriptions(ImportedNamespaceAwareLocalScopeProvider.java:202) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getResourceScope(ImportedNamespaceAwareLocalScopeProvider.java:112) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getResourceScope(ImportedNamespaceAwareLocalScopeProvider.java:101) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getScope(ImportedNamespaceAwareLocalScopeProvider.java:89) at org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getScope(ImportedNamespaceAwareLocalScopeProvider.java:87) at org.eclipse.xtext.scoping.impl.AbstractDeclarativeScopeProvider.delegateGetScope(AbstractDeclarativeScopeProvider.java:72) at org.eclipse.xtext.scoping.impl.AbstractDeclarativeScopeProvider.getScope(AbstractDeclarativeScopeProvider.java:102) 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:169) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:219) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:203) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:263) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1483) at org.xtext.example.mydsl.myDsl.impl.UsageImpl.getEntity(UsageImpl.java:77) at org.xtext.example.mydsl.naming.MyDslNameProvider.qualifiedName(MyDslNameProvider.java:10) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider$2.get(DefaultDeclarativeQualifiedNameProvider.java:62) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider$2.get(DefaultDeclarativeQualifiedNameProvider.java:1) at org.eclipse.xtext.util.OnChangeEvictingCache.get(OnChangeEvictingCache.java:46) at org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider.getFullyQualifiedName(DefaultDeclarativeQualifiedNameProvider.java:58) at org.eclipse.xtext.resource.impl.DefaultResourceDescriptionStrategy.createEObjectDescriptions(DefaultResourceDescriptionStrategy.java:65) at org.eclipse.xtext.resource.impl.DefaultResourceDescription.computeExportedObjects(DefaultResourceDescription.java:88) at org.eclipse.xtext.resource.impl.DefaultResourceDescription$4.get(DefaultResourceDescription.java:172) at org.eclipse.xtext.resource.impl.DefaultResourceDescription$4.get(DefaultResourceDescription.java:1) at org.eclipse.xtext.util.OnChangeEvictingCache.get(OnChangeEvictingCache.java:46) at org.eclipse.xtext.resource.impl.DefaultResourceDescription.getLookUp(DefaultResourceDescription.java:167) at org.eclipse.xtext.resource.impl.AbstractResourceDescription.getExportedObjects(AbstractResourceDescription.java:32) at org.eclipse.xtext.ui.editor.StatefulResourceDescription.copyExportedObjects(StatefulResourceDescription.java:46) at org.eclipse.xtext.ui.editor.StatefulResourceDescription.<init>(StatefulResourceDescription.java:42) at org.eclipse.xtext.ui.editor.DocumentBasedDirtyResource.copyState(DocumentBasedDirtyResource.java:93) at org.eclipse.xtext.ui.editor.DocumentBasedDirtyResource.initiallyProcessResource(DocumentBasedDirtyResource.java:53) at org.eclipse.xtext.builder.impl.PersistentDataAwareDirtyResource.initiallyProcessResource(PersistentDataAwareDirtyResource.java:35) at org.eclipse.xtext.ui.editor.DocumentBasedDirtyResource$1.process(DocumentBasedDirtyResource.java:40) at org.eclipse.xtext.ui.editor.DocumentBasedDirtyResource$1.process(DocumentBasedDirtyResource.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:36) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.readOnly(AbstractReadWriteAcces.java:32) at org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(XtextDocument.java:86) at org.eclipse.xtext.ui.editor.DocumentBasedDirtyResource.connect(DocumentBasedDirtyResource.java:36) at org.eclipse.xtext.ui.editor.DirtyStateEditorSupport.initDirtyResource(DirtyStateEditorSupport.java:261) at org.eclipse.xtext.ui.editor.DirtyStateEditorSupport.initializeDirtyStateSupport(DirtyStateEditorSupport.java:221) at org.eclipse.xtext.ui.editor.AbstractDirtyStateAwareEditorCallback.afterCreatePartControl(AbstractDirtyStateAwareEditorCallback.java:32) at org.eclipse.xtext.builder.nature.NatureAddingEditorCallback.afterCreatePartControl(NatureAddingEditorCallback.java:29) at org.eclipse.xtext.ui.editor.CompoundXtextEditorCallback.afterCreatePartControl(CompoundXtextEditorCallback.java:49) at org.eclipse.xtext.ui.editor.XtextEditor.createPartControl(XtextEditor.java:381) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595) at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:289) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2945) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2850) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2842) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2793) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2789) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2773) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2764) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:355) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:164) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538) at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48) at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:864) at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152) at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256) at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275) at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410) at org.eclipse.equinox.launcher.Main.main(Main.java:1386) The problem is the ImportedNamespaceAwareLocalScopeProvider that needs the name it is actually used to be calculated itself. Reproducible: Always
We won't remove this assertion since it reveals actual bugs (like relying on cross references to compute a name).
so that is the intended way to workarround this? using NodeModelUtils to read the Xtext?
(In reply to comment #2) > so that is the intended way to workarround this? > > using NodeModelUtils to read the Xtext? That would be only a partial solution since the resolved entity may have a longer qualified name due to imports etc. but it may work in some cases. Another option would be to customize the scoping for instances of 'Usage' to make sure that their qualified name is computed locally.
