Ich entwickle ein Eclipse Plugin. In meinem Plugin habe ich den folgenden Code:

Bundle bundle = Platform.getBundle("org.eclipse.acceleo.EcoreDiff2EDelta");
URL fileURL = bundle.getEntry("src/metamodel/EcoreDiff.ecore");
String uri = null;
try {
        uri = FileLocator.resolve(fileURL).getFile();
    } catch (IOException e1) {
        e1.printStackTrace();
    }

    Resource resource = resourceSet.getResource(URI.createURI(uri), true);

Dieser Code greift auf eine Ressource (EcoreDiff.ecore) zu, die sich in meinem Plugin im Ordner src / metamodel befindet. Wenn ich das Plugin durch Klicken mit der rechten Maustaste auf den Projektordner -> Ausführen als -> Eclipse-Anwendung starte, funktioniert alles einwandfrei. Wenn ich das Plugin jedoch als "Deployable Plugin and Fragments" exportiere, erhalte ich den folgenden Stack-Trace, was im Grunde bedeutet, dass die Datei EcoreDiff.ecore nicht gefunden werden konnte. Ich habe zwei Tage lang versucht, das zu beheben, ich verstehe nicht, was falsch ist ...

java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.progress.ProgressManager$3.run(ProgressManager.java:960)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:995)
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:970)
at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1166)
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:91)
at org.eclipse.ui.actions.ActionDelegate.runWithEvent(ActionDelegate.java:70)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:241)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
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:4169)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
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:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
Caused by: java.lang.NullPointerException
at org.eclipse.core.internal.runtime.Activator.getURLConverter(Activator.java:321)
at org.eclipse.core.runtime.FileLocator.resolve(FileLocator.java:227)
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.registerPackages(Generate.java:359)
at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:422)
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.<init>(Generate.java:97)
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.common.GenerateAll.doGenerate(GenerateAll.java:90)
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction$1.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:76)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Root exception:
java.lang.NullPointerException
at org.eclipse.core.internal.runtime.Activator.getURLConverter(Activator.java:321)
at org.eclipse.core.runtime.FileLocator.resolve(FileLocator.java:227)
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.registerPackages(Generate.java:359)
at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:422)
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.<init>(Generate.java:97)
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.common.GenerateAll.doGenerate(GenerateAll.java:90)
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction$1.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:76)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)