[news.eclipse.modeling.mdt.uml2tools] Re: cannot open diagram programmat

[Tatiana Fesenko <tatiana.fesenko@xxxxxxxxxxx>]

Hi Aram,

I found the root of the problem. 

If diagram file is located in eclipse workspace, it is opened correctly in 
both Windows and Linux (I use Ubuntu) systems.
However, when I tried to open diagrams that are not in workspace, it didn't 
work, while *.uml files were opened well.
The reason is, that when file isn't located in Workspace, IDE.getEditorInput() 
is instanceof FileStoreEditorInput. It is used as a parameter in UMLDiagramEditor#setDocumentProvider(IEditorInput) 
.
UMLDiagramEditor#setDocumentProvider(IEditorInput) sets null in such case. 
That's why getDocumentProvider() returns null after and you see NPE.

Solution is to add diagram file to your workspace before opening it. It should 
help.
I hope I wasn't late with the advice.

Best wishes,
Tatiana.

> Hey guys,
>
> I still can't find it. I have to give a demo at thursday and
> I'd like to
> have it working :). The UML2 tree editor works fine while the diagram
> editor always results in an error saying that he can't find the file,
> while
> the file is there.
> thnx.
>
> Aram Hovsepyan wrote:
>
> > Hi,
> >
> > I have the following problem using UML2Tools plugin.
> >
> > I can open the uml2class_diagram files from my Eclipse, however
> > this does
> > not work when I do this programmatically. I get the following
> > error: "Cannot open input element. Reason: text editor does not have
> > a
> > document provider".
> > All other files open fine.
> >
> > Here is the code that handles the opening:
> >
> > IFileStore fileStore = EFS.getLocalFileSystem().getStore(new
> > Path(path));
> IDE.openEditorOnFileStore(PlatformUI.getWorkbench().getActiveWorkbench
> Window().getActivePage(),
>
> > fileStore);
> >
> > I've already tried to launch eclipse with the -clean option. Doesn't
> > help. Thanks in advance for the help.
> >
> > Here is the complete stack trace of the exception:
> >
> > java.lang.NullPointerException
> > at
> org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.DiagramDocum
> entEditor$1.run(DiagramDocumentEditor.java:120)
>
> > at
> org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalConte
> xt.java:369)
>
> > at
> org.eclipse.jface.operation.ModalContext.run(ModalContext.java:313)
>
> > at
> org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.jav
> a:758)
>
> > at
> org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
>
> > at
> > org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java
> > :755) at
> org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2451)
>
> > at
> org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.DiagramDocum
> entEditor.init(DiagramDocumentEditor.java:129)
>
> > at
> org.eclipse.ui.internal.EditorManager.createSite(EditorManager.java:79
> 4)
>
> > at
> org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReferen
> ce.java:643)
>
> > at
> org.eclipse.ui.internal.EditorReference.createPart(EditorReference.jav
> a:426)
>
> > at
> org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartRe
> ference.java:592)
>
> > at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:299) at
> org.eclipse.ui.internal.presentations.PresentablePart.setVisible(Prese
> ntablePart.java:179)
>
> > at
> org.eclipse.ui.internal.presentations.util.PresentablePartFolder.selec
> t(PresentablePartFolder.java:268)
>
> > at
> org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(
> LeftToRightTabOrder.java:65)
>
> > at
> org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.sel
> ectPart(TabbedStackPresentation.java:400)
>
> > at
> org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartSta
> ck.java:1256)
>
> > at
> org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)
>
> > at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1604) at
> > org.eclipse.ui.internal.PartStack.add(PartStack.java:499) at
> > org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103) at
> > org.eclipse.ui.internal.PartStack.add(PartStack.java:485) at
> > org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112) at
> org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContai
> ner.java:63)
>
> > at
> org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.
> java:217)
>
> > at
> org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.ja
> va:207)
>
> > at
> org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.ja
> va:774)
>
> > at
> org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorM
> anager.java:673)
>
> > at
> org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:63
> 4)
>
> > at
> org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchP
> age.java:2737)
>
> > at
> org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.jav
> a:2651)
>
> > at
> > org.eclipse.ui.internal.WorkbenchPage.access$1
> (WorkbenchPage.java:2643)
>
> > at
> org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2595)
>
> > at
> org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
>
> > at
> > org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2
> > 590)
> > at
> > org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2
> > 574)
> > at
> > org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2
> > 557)
> > at org.eclipse.ui.ide.IDE.openEditorOnFileStore(IDE.java:1090)
> > at
> org.kuleuven.grecco.views.GreccoConcernLibraryView$3.run(GreccoConcern
> LibraryView.java:233)
>
> > at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at
> org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(
> ActionContributionItem.java:546)
>
> > at org.eclipse.jface.action.ActionContributionItem.access$
> > (ActionContributionItem.java:490)
> > at
> org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionCo
> ntributionItem.java:402)
>
> > at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
> > at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101) at
> org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319)
>
> > at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)
> > at
> org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
>
> > at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) 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.jav
> a: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(IDEApplic
> ation.java:106)
>
> > at
> org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle
> .java:169)
>
> > at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplic
> ation(EclipseAppLauncher.java:106)
>
> > at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Ecl
> ipseAppLauncher.java:76)
>
> > at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.jav
> a:363)
>
> > at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.jav
> a:176)
>
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.j
> ava:39)
>
> > at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccess
> orImpl.java:25)
>
> > at java.lang.reflect.Method.invoke(Method.java:585)
> > at
> > org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
> > at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447) at
> > org.eclipse.equinox.launcher.Main.run(Main.java:1173)