public static IEditorInput createJarEntryEditorInput(
     IProject project, String jarFile, final String entry) {
   XModelObject o = getJarEntryObject(project, jarFile, entry);
   if (o != null) return new ModelObjectJarEntryEditorInput(o, jarFile, entry);
   return XModelObjectEditorInputFactory.createNullEditorInput(entry);
 }