protected function getCriteriaSortations( array $params )
	{
		$sortation = [];

		foreach( $params as $sort )
		{
			if( $sort[0] === '-' ) {
				$sortation[substr( $sort, 1 )] = '-';
			} else {
				$sortation[$sort] = '+';
			}
		}

		return $sortation;
	}