<?php
  
  /**
   * The Lock manager allows you to handle all file-locks centrally.
   *
   * This is an alternative approach to doing this on a per-node basis
   *
   * @package Sabre
   * @subpackage DAV
   * @copyright Copyright (C) 2007-2013 Rooftop Solutions. All rights reserved.
   * @author Evert Pot (http://www.rooftopsolutions.nl/)
   * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
   */
  abstract class Sabre_DAV_Locks_Backend_Abstract {
  
      /**
       * Returns a list of Sabre_DAV_Locks_LockInfo objects
       *
       * This method should return all the locks for a particular uri, including
       * locks that might be set on a parent uri.
       *
       * If returnChildLocks is set to true, this method should also look for
       * any locks in the subtree of the uri for locks.
       *
       * @param string $uri
       * @param bool $returnChildLocks
       * @return array
       */
      abstract function getLocks($uri, $returnChildLocks);
  
      /**
       * Locks a uri
       *
       * @param string $uri
       * @param Sabre_DAV_Locks_LockInfo $lockInfo
       * @return bool
       */
      abstract function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
  
      /**
       * Removes a lock from a uri
       *
       * @param string $uri
       * @param Sabre_DAV_Locks_LockInfo $lockInfo
       * @return bool
       */
      abstract function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
  
  }