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

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

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

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)