private static function _getCacheObject()
	{
		if (self::$_sTypeOfCache === 'file') {

			if (!isset(self::$_aCache['file'])) { self::$_aCache['file'] = new CacheFile; }

			return self::$_aCache['file'];
		}
		else if (self::$_sTypeOfCache === 'memcache') {
  		  
			if (!isset(self::$_aCache['memcache'])) { 
			    
			    $oDbConf = Config::get('Memcache')->configuration;
			    
			    if (isset($oDbConf->port)) { $sPort = $oDbConf->port; }
			    else { $sPort = null; }
			    
			    if (isset($oDbConf->timeout)) { $iTimeout = $oDbConf->timeout; }
			    else { $iTimeout = null; }
			    
			    self::$_aCache['memcache'] = new CacheMemcache($oDbConf->host, $sPort, $iTimeout); 
			}

			return self::$_aCache['memcache'];
		}
		else if (self::$_sTypeOfCache === 'apc') {

			if (!isset(self::$_aCache['apc'])) { self::$_aCache['apc'] = new Apc; }

			return self::$_aCache['apc'];
		}
		else if (self::$_sTypeOfCache === 'redis') {
		    
			if (!isset(self::$_aCache['redis'])) {
			    
			    $oDbConf = Config::get('Redis')->configuration;
			    self::$_aCache['memcache'] = new Redis($oDbConf);
			}

			return self::$_aCache['redis'];
		}
		else if (self::$_sTypeOfCache === 'mock') {
		    
			if (!isset(self::$_aCache['mock'])) { self::$_aCache['mock'] = new Mock; }

			return self::$_aCache['mock'];
		}
	}