private function _initCriteriaConditions( MW_Common_Criteria_Interface $criteria, stdClass $params )
	{
		if( isset( $params->condition ) && is_object( $params->condition ) )
		{
			$existing = $criteria->getConditions();
			$criteria->setConditions( $criteria->toConditions( (array) $params->condition ) );
			$expr = array (
				$criteria->getConditions(),
				$existing
			);

			$criteria->setConditions( $criteria->combine( '&&', $expr ) );
		}
	}