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How to make diagram files survive plugin code regeneration? [message #71359]

Sat, 28 October 2006 16:22

Eclipse User

Whenever one regenerates the diagram code, the newly created plugin
crashes with a nullpointer-exception when trying to open a diagram file
created by a previous version (see below). Can one somehow prevent
that - e.g. define explicit IDs or serialUIDs or such?

If one needs to change something in the application that should have no
influence on the model nor the the graphical model used (like e.g.
correcting a spelling error in some menu item or adding an optional new
field), this clearly must not invalidate prior generated files or else,
changing even the tiniest detail of an application makes all previous
data files obsolete. Such a tool or approach would never be acceptable
for the development of any real-world application...

Michael

----------------------------
....
java.lang.NullPointerException
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eSettingDelegate (BasicEObjectImpl.java:1115)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjec tImpl.java:610)
at test.impl.ArtifactTypeImpl.eGet(ArtifactTypeImpl.java:109)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjec tImpl.java:595)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjec tImpl.java:587)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjec tImpl.java:582)
at
test.diagram.providers.TestStructuralFeatureParser.getString ByPattern(TestStructuralFeatureParser.java:84)
at
test.diagram.providers.TestStructuralFeatureParser.getString ByPattern(TestStructuralFeatureParser.java:75)
at
test.diagram.providers.TestAbstractParser.getPrintString(Tes tAbstractParser.java:112)
at
test.diagram.edit.parts.ArtifactContainerTypeNameEditPart.ge tLabelText(ArtifactContainerTypeNameEditPart.java:249)
at
test.diagram.edit.parts.ArtifactContainerTypeNameEditPart.re freshLabel(ArtifactContainerTypeNameEditPart.java:470)
at
test.diagram.edit.parts.ArtifactContainerTypeNameEditPart.re freshVisuals(ArtifactContainerTypeNameEditPart.java:459)
at
test.diagram.edit.parts.ArtifactContainerTypeNameEditPart.se tLabel(ArtifactContainerTypeNameEditPart.java:203)
at
test.diagram.edit.parts.ArtifactContainerTypeEditPart.addFix edChild(ArtifactContainerTypeEditPart.java:120)
at
test.diagram.edit.parts.ArtifactContainerTypeEditPart.addChi ldVisual(ArtifactContainerTypeEditPart.java:200)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:197)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:727)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:677)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt.access$3(GraphicalEditPart.java:1)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt$3.run(GraphicalEditPart.java:824)
at
org.eclipse.emf.transaction.impl.TransactionalEditingDomainI mpl.runExclusive(TransactionalEditingDomainImpl.java:258)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt.refresh(GraphicalEditPart.java:814)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:235)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:198)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:727)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:677)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt.access$3(GraphicalEditPart.java:1)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt$3.run(GraphicalEditPart.java:824)
at
org.eclipse.emf.transaction.impl.TransactionalEditingDomainI mpl.runExclusive(TransactionalEditingDomainImpl.java:258)
at
org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPa rt.refresh(GraphicalEditPart.java:814)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:235)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:198)
at
org.eclipse.gef.editparts.SimpleRootEditPart.setContents(Sim pleRootEditPart.java:101)
at
org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents( AbstractEditPartViewer.java:583)
at
org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents( AbstractEditPartViewer.java:592)
at
org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.initi alizeGraphicalViewerContents(DiagramEditor.java:854)
at
org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.initi alizeGraphicalViewer(DiagramEditor.java:847)
at
org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditorWithFl yOutPalette.initializeGraphicalViewer(DiagramEditorWithFlyOu tPalette.java:112)
at
org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.creat eGraphicalViewer(DiagramEditor.java:791)
at
org.eclipse.gef.ui.parts.GraphicalEditor.createPartControl(G raphicalEditor.java:163)
at
org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditorWithFl yOutPalette.createPartControl(DiagramEditorWithFlyOutPalette .java:310)
at
org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.Di agramDocumentEditor.createPartControl(DiagramDocumentEditor. java:1459)
at
org.eclipse.ui.internal.EditorReference.createPartHelper(Edi torReference.java:596)
at
org.eclipse.ui.internal.EditorReference.createPart(EditorRef erence.java:372)
at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:566)
at
org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(Ed itorAreaHelper.java:263)
at
org.eclipse.ui.internal.EditorManager.setVisibleEditor(Edito rManager.java:1446)
at org.eclipse.ui.internal.EditorManager$5.run(EditorManager.ja va:1006)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
at org.eclipse.core.runtime.Platform.run(Platform.java:843)
at
org.eclipse.ui.internal.EditorManager.restoreState(EditorMan ager.java:1001)
at
org.eclipse.ui.internal.WorkbenchPage.restoreState(Workbench Page.java:2843)
at
org.eclipse.ui.internal.WorkbenchWindow.restoreState(Workben chWindow.java:1936)
at
org.eclipse.ui.internal.Workbench.doRestoreState(Workbench.j ava:2857)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.jav a:1665)
at org.eclipse.ui.internal.Workbench.access$12(Workbench.java:1 650)
at org.eclipse.ui.internal.Workbench$17.run(Workbench.java:1529 )
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.jav a:1473)
at
org.eclipse.ui.internal.WorkbenchConfigurer.restoreState(Wor kbenchConfigurer.java:183)
at
org.eclipse.ui.application.WorkbenchAdvisor.openWindows(Work benchAdvisor.java:702)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1085)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1847)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:419)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
at
org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplicatio n.java:95)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(Pl atformActivator.java:78)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .runApplication(EclipseAppLauncher.java:92)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .start(EclipseAppLauncher.java:68)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:400)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:64)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe thodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:615)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336 )
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)
----------------------------

Different error: generated code can't read its own files. [message #71437 is a reply to message #71359]

Mon, 30 October 2006 06:00

Eclipse User

Actually - it just turned out - that this error has a completely
different reason:

The generated code does not only have trouble to read data-files from
previous versions, it has trouble reading data-files at all! I.e. for
some reason, the GMF-generated code can not read its own files, even if
it's the identical code and version. Already closing (and saving) a
diagram and immediately reopening it again leads to the described
null-pointer expection.

Due to my edit-build-test cycles I accidentally had thought, that this
problem only happens after a rebuild. But there isn't even a rebuild
necessary to reproduce these crashes..

Michael

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