owncloud / core

	 * @return array an array of the meta data of the scanned file or folder

	 */

	public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {

		if ($reuse === -1) {

			$reuse = ($recursive === self::SCAN_SHALLOW) ? self::REUSE_ETAG | self::REUSE_SIZE : self::REUSE_ETAG;

		}

		if ($lock) {

			$this->lockingProvider->acquireLock('scanner::' . $this->storageId . '::' . $path, ILockingProvider::LOCK_EXCLUSIVE);

			$this->storage->acquireLock($path, ILockingProvider::LOCK_SHARED, $this->lockingProvider);

	 * @return int the size of the scanned folder or -1 if the size is unknown at this stage

	 */

	protected function scanChildren($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $folderData = null, $lock = true) {

		if ($reuse === -1) {

			$reuse = ($recursive === self::SCAN_SHALLOW) ? self::REUSE_ETAG | self::REUSE_SIZE : self::REUSE_ETAG;

		}

		$this->emit('\OC\Files\Cache\Scanner', 'scanFolder', array($path, $this->storageId));

		$size = 0;

		$childQueue = array();