/**
  * @see BackendAdapter::updateFolder
  */
 public function updateFolder(Folder $folder)
 {
     $sql = "\n        UPDATE xi_filelib_folder\n        SET parent_id = :parentId, foldername = :name, folderurl = :url, uuid = :uuid, data = :data\n        WHERE id = :id\n        ";
     $stmt = $this->conn->prepare($sql);
     $stmt->execute(array('parentId' => $folder->getParentId(), 'name' => $folder->getName(), 'url' => $folder->getUrl(), 'uuid' => $folder->getUuid(), 'id' => $folder->getId(), 'data' => json_encode($folder->getdata()->toArray())));
     return (bool) $stmt->rowCount();
 }