Bug 116685 [CommonNavigator] ClassCastException trying to execute action
Prevents action contributions from being executed. This exception was created using a popupMenu objectContribution extension (using DTP with its sample connection profile plug-in). java.lang.ClassCastException at org.eclipse.ui.navigator.internal.NavigatorContentService$1.compare (NavigatorContentService.java:669) at java.util.Arrays.mergeSort(Arrays.java:1278) at java.util.Arrays.sort(Arrays.java:1219) at org.eclipse.ui.navigator.internal.NavigatorContentService.extractDescriptorInsta nces(NavigatorContentService.java:640) at org.eclipse.ui.navigator.internal.NavigatorContentService.extractDescriptorInsta nces(NavigatorContentService.java:617) at org.eclipse.ui.navigator.internal.NavigatorContentService.findRelevantContentExt ensions(NavigatorContentService.java:272) at org.eclipse.ui.navigator.internal.NavigatorActionService.addContentDescriptorMen u(NavigatorActionService.java:194) at org.eclipse.ui.navigator.internal.NavigatorActionService.fillContextMenu (NavigatorActionService.java:159) at org.eclipse.ui.navigator.CommonNavigatorManager.fillContextMenu (CommonNavigatorManager.java:158) at org.eclipse.ui.navigator.CommonNavigatorManager$1.menuAboutToShow (CommonNavigatorManager.java:177) at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:285) at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:372) at org.eclipse.jface.action.MenuManager.access$0(MenuManager.java:369) at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:386) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:117) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:896) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:920) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:901) at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:3451) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3168) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1538) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3908) at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method) at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:225) at org.eclipse.swt.widgets.Display.runPopups(Display.java:3262) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2850) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1774) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1738) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:376) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:106) at org.eclipse.core.internal.runtime.PlatformActivator$1.run (PlatformActivator.java:226) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:165) 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.invokeFramework(Main.java:338) at org.eclipse.core.launcher.Main.basicRun(Main.java:282) at org.eclipse.core.launcher.Main.run(Main.java:977) at org.eclipse.core.launcher.Main.main(Main.java:952)
bundles/org.eclipse.ui.navigator/src-navigator/org/eclipse/ui/navigator/internal/NavigatorContentService.java
IMementoAware, INavigatorContentService {
	private static final NavigatorActivationService NAVIGATOR_ACTIVATION_SERVICE = NavigatorActivationService
			.getInstance();
	private static final NavigatorContentDescriptorRegistry CONTENT_DESCRIPTOR_REGISTRY = NavigatorContentDescriptorRegistry
			.getInstance();
	private static final NavigatorViewerDescriptorRegistry VIEWER_DESCRIPTOR_REGISTRY = NavigatorViewerDescriptorRegistry
			.getInstance();
	private static final NavigatorContentExtension[] NO_DESCRIPTOR_INSTANCES = new NavigatorContentExtension[0];
	private static final ITreeContentProvider[] NO_CONTENT_PROVIDERS = new ITreeContentProvider[0];
	private static final ILabelProvider[] NO_LABEL_PROVIDERS = new ILabelProvider[0];
	private final NavigatorViewerDescriptor viewerDescriptor;
	private final List listeners = new ArrayList();
	/*
	 * A map of (String-based-Navigator-Content-Extension-IDs,
	 * NavigatorContentExtension-objects)-pairs
	 */
	private final Map contentExtensions = new HashMap();
	private StructuredViewerManager structuredViewerManager;
	private ITreeContentProvider[] rootContentProviders;
	private Collection exclusions = new ArrayList();
	private WeakHashMap contributionMemory;
	/**
	 * 
	 */