[news.eclipse.modeling.gmf] Re: null pointer exception with draw2d

[Rene Ladan <r.c.ladan@xxxxxx>]

Rene Ladan wrote:
> Hi,
> 
> I'm getting the below null pointer exception when I first draw a model in a
> generated GMF editor, alter the gmfgraph/gmfmap file, regenerate the gmfgen
> file and the Java code, and then try to reload the model.  The ecore file is not
> modified, so the model itself should still be valid.  I first thought that it
> was caused by a small change in the representation of the Component element (see
> the marked line, changing the Fill property from false to true) but that wasn't
> the case.  I also deleted and recreated the gmfgen file, which didn't help
> either.  All gmf* model files are validated ok.
> 
> Versions:
> * Eclipse 3.4 Integration 20070921919
> * EMF 2.3.1 20070925
> * OCL 2.0.* 20070921
> * GEF 3.4.0 20070919
> * GMF SDK 2.0 20070903 (Integration)
> * Apache Batik 1.6.0 200706111724
> 
Upgrading to GMF 2.0.1 20070928 and regenerating the gmfgen and java files
doesn't help (same backtrace).  Could this be caused by an undetected
modeling error?

> Any clues?
> 
> Thanks,
> Rene
> 
> java.lang.NullPointerException
> 	at org.eclipse.draw2d.Figure.add(Figure.java:146)
> 	at org.eclipse.draw2d.Figure.add(Figure.java:179)
> 	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addChildVisual(AbstractGraphicalEditPart.java:198)
> 	at meta.diagram.edit.parts.ComponentEditPart.addChildVisual(ComponentEditPart.java:135) <-- ?
> 	at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:197)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.addChild(GraphicalEditPart.java:1292)
> 	at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:727)
> 	at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:677)
> 	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:564)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.access$3(GraphicalEditPart.java:1)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart$3.run(GraphicalEditPart.java:836)
> 	at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.runExclusive(TransactionalEditingDomainImpl.java:262)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.refresh(GraphicalEditPart.java:826)
> 	at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235)
> 	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:212)
> 	at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.addChild(GraphicalEditPart.java:1292)
> 	at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:727)
> 	at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:677)
> 	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:564)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.access$3(GraphicalEditPart.java:1)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart$3.run(GraphicalEditPart.java:836)
> 	at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.runExclusive(TransactionalEditingDomainImpl.java:262)
> 	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.refresh(GraphicalEditPart.java:826)
> 	at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235)
> 	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:212)
> 	at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198)
> 	at org.eclipse.gef.editparts.SimpleRootEditPart.setContents(SimpleRootEditPart.java:101)
> 	at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(AbstractEditPartViewer.java:601)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramGraphicalViewer.setContents(DiagramGraphicalViewer.java:378)
> 	at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(AbstractEditPartViewer.java:610)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.initializeGraphicalViewerContents(DiagramEditor.java:857)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.initializeGraphicalViewer(DiagramEditor.java:850)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditorWithFlyOutPalette.initializeGraphicalViewer(DiagramEditorWithFlyOutPalette.java:112)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.createGraphicalViewer(DiagramEditor.java:794)
> 	at org.eclipse.gef.ui.parts.GraphicalEditor.createPartControl(GraphicalEditor.java:163)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.createPartControl(DiagramEditor.java:1548)
> 	at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditorWithFlyOutPalette.createPartControl(DiagramEditorWithFlyOutPalette.java:310)
> 	at org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.DiagramDocumentEditor.createPartControl(DiagramDocumentEditor.java:1459)
> 	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661)
> 	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:426)
> 	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:594)
> 	at org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(EditorAreaHelper.java:263)
> 	at org.eclipse.ui.internal.EditorManager.setVisibleEditor(EditorManager.java:1405)
> 	at org.eclipse.ui.internal.EditorManager$5.runWithException(EditorManager.java:939)
> 	at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
> 	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
> 	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:124)
> 	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3719)
> 	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3356)
> 	at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:801)
> 	at org.eclipse.ui.internal.Workbench$25.runWithException(Workbench.java:1342)
> 	at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
> 	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
> 	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:124)
> 	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3719)
> 	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3356)
> 	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309)
> 	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
> 	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
> 	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
> 	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
> 	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
> 	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
> 	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> 	at java.lang.reflect.Method.invoke(Unknown Source)
> 	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:515)
> 	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:455)
> 	at org.eclipse.equinox.launcher.Main.run(Main.java:1193)
> 	at org.eclipse.equinox.launcher.Main.main(Main.java:1169)