Bug 30341 NPE attempting "Show in package explorer" [packge explorer]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
fViewer.setSelection(selection);
	}
	private ISelection convertSelection(ISelection s) {
		if (!(s instanceof IStructuredSelection))
			return s;
			
		Object[] elements= ((StructuredSelection)s).toArray();
		if (!containsResources(elements))
			return s;
				
		for (int i= 0; i < elements.length; i++) {
			Object o= elements[i];
			if (o instanceof IResource) {
				IJavaElement jElement= JavaCore.create((IResource)o);
				if (jElement != null) 
					elements[i]= jElement;
			}
		}
		
		return new StructuredSelection(elements);
	}
	
	private boolean containsResources(Object[] elements) {
		for (int i = 0; i < elements.length; i++) {
			if (elements[i] instanceof IResource)
				return true;
		}
		return false;
	}