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Nothing comes when I drag a node on to the Editor [message #772319]

Thu, 29 December 2011 14:06

vinny503 Missing name

Messages: 156
Registered: August 2011

Senior Member

Hi All,

In my GMF Application, When I drag a node and drop it on to the Editor nothing comes.

Error shown below...

!ENTRY org.eclipse.gmf.runtime.diagram.ui 4 4 2011-12-29 19:27:15.368
!MESSAGE execute
!STACK 0
org.eclipse.core.commands.ExecutionException: While executing the operation, an exception occurred
at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:521)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramCommandStack.execute(DiagramCommandStack.java:206)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramCommandStack.execute(DiagramCommandStack.java:169)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramCommandStack.execute(DiagramCommandStack.java:156)
at org.eclipse.gef.dnd.AbstractTransferDropTargetListener.handleDrop(AbstractTransferDropTargetListener.java:339)
at org.eclipse.gef.dnd.TemplateTransferDropTargetListener.handleDrop(TemplateTransferDropTargetListener.java:115)
at org.eclipse.gmf.runtime.diagram.ui.internal.parts.PaletteToolTransferDropTargetListener.handleDrop(PaletteToolTransferDropTargetListener.java:89)
at org.eclipse.gef.dnd.AbstractTransferDropTargetListener.drop(AbstractTransferDropTargetListener.java:183)
at org.eclipse.jface.util.DelegatingDropAdapter$3.run(DelegatingDropAdapter.java:211)
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.util.DelegatingDropAdapter.drop(DelegatingDropAdapter.java:209)
at org.eclipse.swt.dnd.DNDListener.handleEvent(DNDListener.java:90)
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.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
at org.eclipse.swt.dnd.DropTarget.Drop(DropTarget.java:456)
at org.eclipse.swt.dnd.DropTarget$3.method6(DropTarget.java:258)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:119)
at org.eclipse.swt.internal.ole.win32.COM.DoDragDrop(Native Method)
at org.eclipse.swt.dnd.DragSource.drag(DragSource.java:363)
at org.eclipse.swt.dnd.DragSource.access$0(DragSource.java:289)
at org.eclipse.swt.dnd.DragSource$1.handleEvent(DragSource.java:172)
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:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at omsbuilder.diagram.application.OmsbuilderApplication.start(OmsbuilderApplication.java:22)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
at org.eclipse.equinox.launcher.Main.main(Main.java:1383)
Caused by: java.lang.NullPointerException
at org.eclipse.emf.common.util.BasicEList.get(BasicEList.java:354)
at omsbuilder.impl.ComponentImpl.eIsSet(ComponentImpl.java:211)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eIsSet(BasicEObjectImpl.java:1247)
at org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl.hasNext(EContentsEList.java:407)
at org.eclipse.emf.ecore.util.EcoreUtil$ProperContentIterator.hasNext(EcoreUtil.java:1258)
at org.eclipse.emf.ecore.util.EcoreUtil$ContentTreeIterator.hasNext(EcoreUtil.java:1442)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.attached(ResourceImpl.java:860)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eBasicSetContainer(BasicEObjectImpl.java:1342)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eInverseAdd(BasicEObjectImpl.java:1423)
at org.eclipse.emf.ecore.util.EcoreEList.inverseAdd(EcoreEList.java:292)
at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:292)
at org.eclipse.emf.common.util.AbstractEList.add(AbstractEList.java:307)
at omsbuilder.diagram.edit.commands.ComponentCreateCommand.doExecuteWithResult(ComponentCreateCommand.java:63)
at org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand.doExecute(AbstractTransactionalCommand.java:247)
at org.eclipse.emf.workspace.AbstractEMFOperation.execute(AbstractEMFOperation.java:150)
at org.eclipse.gmf.runtime.diagram.ui.commands.SemanticCreateCommand.doExecuteWithResult(SemanticCreateCommand.java:91)
at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.execute(AbstractCommand.java:134)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.doExecuteWithResult(CompositeCommand.java:403)
at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.execute(AbstractCommand.java:134)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.doExecuteWithResult(CompositeCommand.java:403)
at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.execute(AbstractCommand.java:134)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.doExecuteWithResult(CompositeCommand.java:403)
at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.execute(AbstractCommand.java:134)
at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:513)
... 50 more

Regards,
Vinay

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Re: Nothing comes when I drag a node on to the Editor [message #780924 is a reply to message #772319]

Thu, 19 January 2012 23:20

UmaShankar Subramani

Messages: 194
Registered: December 2011
Location: SWEDEN

Senior Member

No Message Body

[Updated on: Fri, 20 January 2012 13:59]

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Re: Nothing comes when I drag a node on to the Editor [message #781082 is a reply to message #780924]

Fri, 20 January 2012 13:00

Michael Golubev

Messages: 383
Registered: July 2009

Senior Member

Hello,

The part of stack trace below looks suspicious to me, because normally eIsSet is not calling the list.get().
I may guess that you have some generated @not code here.

Caused by: java.lang.NullPointerException
at org.eclipse.emf.common.util.BasicEList.get(BasicEList.java:354)
at omsbuilder.impl.ComponentImpl.eIsSet(ComponentImpl.java:211)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eIsSet(BasicEObjectImpl.java:1247)

In any case, the bottom part of the whole stack trace shows that it is thrown from pure EMF generated code, on attempt to add the new created object into the new container. Can you check that the code whatever change you are doing at the ComponentCreateCommand.doExecuteWithResult(ComponentCreateCommand.java:63) actually works without the GMF?

There are no GMF-specific code executed at the time when it fails -- only your model and basic EMF staff is running there.

Regards,
Michael "Borlander" Golubev
at Montages Think Tank, Prague, Czech Republic
Montages AG, Zürich, Switzerland

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