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[news.eclipse.modeling.gmf] Re: null pointer exception with draw2d 
But you can use Eclipse debugger, right? )))

Rene Ladan wrote:
Boris Blajer wrote: 
Hi Rene,

The stack trace indicates that the child you are creating returns null
from its createFigure() method. AFAIK, no GMF generated edit parts
exhibit this behavior, so please check if there is some hand-modified
code (or use of custom templates).

I didn't modify any GMF-related code (only some code in the generated EMF
editor meta.editor.MetaEditor.java), nor did I use any custom JET templates.

Could this be caused by some mismatch between the gmfgraph and gmfmap file?
Both validate ok, so either the validation is too loose or there exists a
bug in the GMF code generator (the gmfgen file also validates ok).

Regards,
Rene

Best regards,
Boris



Rene Ladan wrote:
Rene Ladan wrote:
[..] 
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)