/**
  * Ensure the subject is public
  * 
  * (non-PHPdoc)
  * @see \Application\Controller\DatabasesController::subjectAction()
  */
 public function subjectAction()
 {
     $response = parent::subjectAction();
     $category = $response->getVariable('category');
     if ($category->isPublic() == false) {
         throw new AccessDeniedException('This list is not public');
     }
     return $response;
 }