Bug 63769 Endless loop after Show in Package Explorer
there are situations when you run in an endless loop in show in package explorer when the action is attempting to reveal an element.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
private void fillActionBars() {
		IActionBars actionBars= getViewSite().getActionBars();
		fActionSet.fillActionBars(actionBars);
	}
	
	private Object findInputElement() {
		Object input= getSite().getPage().getInput();
		if (input instanceof IWorkspace) { 
			return JavaCore.create(((IWorkspace)input).getRoot());
		} else if (input instanceof IContainer) {
			IJavaElement element= JavaCore.create((IContainer)input);
			if (element != null && element.exists())
				return element;
			return input;
		}
		
		
		
		return JavaCore.create(JavaPlugin.getWorkspace().getRoot());	
	}
	
	/**
	 * Answer the property defined by key.
	 */
	public Object getAdapter(Class key) {
		if (key.equals(ISelectionProvider.class))
			return fViewer;
		if (key == IShowInSource.class) {
			return getShowInSource();