public function actionReadMetadata($className)
 {
     if (!Group::isUserASuperAdministrator(Yii::app()->user->userModel)) {
         throw new NotSupportedException();
     }
     if (GlobalMetadata::isClassMetadataSavedInDatabase($className)) {
         echo 'The metadata is saved in the database ' . "<BR>";
     } else {
         echo 'The metadata is not saved in the database ' . "<BR>";
     }
     echo "<pre>";
     print_r($className::getMetadata());
     echo "</pre>";
 }