/**
  * 
  * @return \oat\tao\model\search\zend\ZendSearch
  */
 public static function createSearch()
 {
     $privateDataPath = FILES_PATH . 'tao' . DIRECTORY_SEPARATOR . 'ZendSearch' . DIRECTORY_SEPARATOR;
     if (file_exists($privateDataPath)) {
         \helpers_File::emptyDirectory($privateDataPath);
     }
     $privateFs = \tao_models_classes_FileSourceService::singleton()->addLocalSource('Zend Search index folder', $privateDataPath);
     $search = new ZendSearch(array('fileSystem' => $privateFs->getUri()));
     $search->flushIndex();
     return $search;
 }