protected function _checkLogLevel( $level )
	{
		switch( $level )
		{
			case MW_Logger_Abstract::EMERG:
			case MW_Logger_Abstract::ALERT:
			case MW_Logger_Abstract::CRIT:
			case MW_Logger_Abstract::ERR:
			case MW_Logger_Abstract::WARN:
			case MW_Logger_Abstract::NOTICE:
			case MW_Logger_Abstract::INFO:
			case MW_Logger_Abstract::DEBUG:
				break;
			default:
				throw new MW_Logger_Exception( sprintf( 'Invalid log level constant "%1$d"', $level ) );
		}
	}