/**
	 * Create an object of a subclass
	 * $command has to match the job's classname!
	 */
	static function factory($command, $title, $params = false, $id = 0) {

		//Workaround
		//makes the existing jobs work with the new mechanism
		switch ($command) {
			case 'refreshLinks' :
					$jobfilename = 'RefreshLinksJob';
					break;
			case 'htmlCacheUpdate':
			case 'html_cache_update': # BC
					return new HTMLCacheUpdateJob( $title, $params['table'], $params['start'], $params['end'], $id );
			case 'sendMail':
					return new EmaillingJob($params);
			case 'enotifNotify':
					return new EnotifNotifyJob($title, $params);
			default :
				$jobfilename = $command;
		}

		try {
			wfProfileIn(__METHOD__.'-autoload');
			__autoload($jobfilename);
			return new $jobfilename ($title, $params, $id);
			wfProfileOut(__METHOD__.'-autoload');
		} catch (Exception $e) {
			throw new MWException("Invalid job command \"$command\"\\n. Could not load class ".$jobfilename." ");
		}

	}