at org.eclipse.jdt.internal.core.JavaProject.computeExpandedClasspath(JavaProject.java:1217)
        at org.eclipse.jdt.internal.core.JavaProject.getExpandedClasspath(JavaProject.java:1175)
        at org.eclipse.jdt.internal.core.JavaProject.getExpandedClasspath(JavaProject.java:1158)
        at org.eclipse.jdt.internal.core.JavaProject.getClasspathEntryFor(JavaProject.java:648)
        at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.findSourceAttachmentRecommendation(JarPackageFragmentRoot.java:389)
        at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.getSourceAttachmentProperty(JarPackageFragmentRoot.java:492)
        at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.getSourceAttachmentPath(JarPackageFragmentRoot.java:471)
        at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.openWhenClosed(JarPackageFragmentRoot.java:595)
        at org.eclipse.jdt.internal.core.JavaElement.openHierarchy(JavaElement.java:481)
        at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:277)
        - locked <0496AA48> (a org.eclipse.jdt.internal.core.JavaModelManager)
        at org.eclipse.jdt.internal.core.JavaElement.getChildren(JavaElement.java:234)
        at org.eclipse.jdt.internal.core.NameLookup.seekPackageFragments(NameLookup.java:501)
        at org.eclipse.jdt.internal.core.NameLookup.findType(NameLookup.java:355)
        at org.eclipse.jdt.internal.core.SearchableEnvironment.find(SearchableEnvironment.java:49)
        at org.eclipse.jdt.internal.core.SearchableEnvironment.findType(SearchableEnvironment.java:117)
        at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:59)
        at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:23)
        at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.superInterfaces(BinaryTypeBinding.java:411)
        at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.remember(HierarchyResolver.java:257)
        at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:464)
        at org.eclipse.jdt.internal.core.hierarchy.HierarchyBuilder.buildSupertypes(HierarchyBuilder.java:108)
        at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.build(IndexBasedHierarchyBuilder.java:162)
        at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.compute(TypeHierarchy.java:249)
        at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.refresh(TypeHierarchy.java:1094)
        at org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation.executeOperation(CreateTypeHierarchyOperation.java:52)
        at org.eclipse.jdt.internal.core.JavaModelOperation.execute(JavaModelOperation.java:268)
        at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:476)
        at org.eclipse.jdt.internal.core.JavaModelManager.runOperation(JavaModelManager.java:1022)
        at org.eclipse.jdt.internal.core.JavaElement.runOperation(JavaElement.java:534)
        at org.eclipse.jdt.internal.core.BinaryType.newSupertypeHierarchy(BinaryType.java:339)
        at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.doHierarchyRefresh(TypeHierarchyLifeCycle.java:143)
        at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.access$0(TypeHierarchyLifeCycle.java:130)
        at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle$1.run(TypeHierarchyLifeCycle.java:106)
        at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext$BusyRunnable.internalRun(BusyIndicatorRunnableContext.java:107)
        at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext$BusyRunnable.run(BusyIndicatorRunnableContext.java:74)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:56)
        at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext.run(BusyIndicatorRunnableContext.java:120)
        at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.ensureRefreshedTypeHierarchy(TypeHierarchyLifeCycle.java:114)
        at org.eclipse.jdt.internal.ui.viewsupport.OverrideAdornmentProvider.getTypeHierarchy(OverrideAdornmentProvider.java:62)
        at org.eclipse.jdt.internal.ui.viewsupport.OverrideAdornmentProvider.computeAdornmentFlags(OverrideAdornmentProvider.java:38)
        at org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider.getImage(JavaUILabelProvider.java:82)
        at org.eclipse.jface.viewers.DecoratingLabelProvider.getCombinedLabel(DecoratingLabelProvider.java:175)
        at org.eclipse.jface.viewers.StructuredViewer.getLabel(StructuredViewer.java:1043)
        at org.eclipse.jface.viewers.TreeViewer.doUpdateItem(TreeViewer.java:88)
        at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:352)
        at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:1000)
        at org.eclipse.jdt.internal.ui.javaeditor.JavaOutlinePage$JavaOutlineViewer.createTreeItem(JavaOutlinePage.java:341)
        at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:241)
        at org.eclipse.jface.viewers.AbstractTreeViewer.internalExpandToLevel(AbstractTreeViewer.java:758)
        at org.eclipse.jdt.internal.ui.javaeditor.JavaOutlinePage$JavaOutlineViewer.internalExpandToLevel(JavaOutlinePage.java:307)
        at org.eclipse.jdt.internal.ui.javaeditor.JavaOutlinePage$JavaOutlineViewer.createTreeItem(JavaOutlinePage.java:347)
        at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:241)
        at org.eclipse.jface.viewers.AbstractTreeViewer$3.run(AbstractTreeViewer.java:652)
        at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:572)
        at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:644)
        at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:234)
        at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:741)
        at org.eclipse.jdt.internal.ui.javaeditor.JavaOutlinePage.createControl(JavaOutlinePage.java:735)
        at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:105)
        at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:275)
        at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:516)
        at org.eclipse.ui.internal.PartListenerList$1.run(PartListenerList.java:37)
        at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:836)
        at org.eclipse.core.runtime.Platform.run(Platform.java:395)
        at org.eclipse.ui.internal.PartListenerList.firePartActivated(PartListenerList.java:35)
        at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:697)
        at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:1684)
        at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:108)
        at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:1305)
        at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:1255)
        at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:130)
        at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:102)
        at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:89)
        at org.eclipse.jdt.internal.ui.packageview.OpenResourceAction.run(OpenResourceAction.java:51)
        at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.handleDoubleClick(PackageExplorerPart.java:694)
        at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart.access$1(PackageExplorerPart.java:689)
        at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.doubleClick(PackageExplorerPart.java:338)
        at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:272)
        at org.eclipse.jface.viewers.StructuredViewer.handleDoubleSelect(StructuredViewer.java:416)
        at org.eclipse.jface.viewers.AbstractTreeViewer$1.widgetDefaultSelected(AbstractTreeViewer.java:627)
        at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:92)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:75)
        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:637)
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1420)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1208)
        at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:755)
        at org.eclipse.ui.internal.Workbench.run(Workbench.java:738)
        at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:777)
        at org.eclipse.core.boot.BootLoader.run(BootLoader.java:319)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.eclipse.core.launcher.Main.basicRun(Main.java:190)
        at org.eclipse.core.launcher.Main.run(Main.java:549)
        at org.eclipse.core.launcher.Main.main(Main.java:390)