public function getFacetParameters()
    {
        $facetArray = array();
        foreach ( $_GET as $name => $value )
        {
            if ( strpos( $name, 'facet_' ) === 0 )
            {
                $facetArray[substr( $name, 6 )] = $value;
            }
        }

        return array( 'result' => array( $facetArray ) );
    }