r\Datum\StringDatum::setValue PHP Méthode

    public function setValue($val)
    {
        if (!is_string($val)) {
            throw new RqlDriverError("Not a string");
        }
        parent::setValue($val);
    }

 public static function decodeServerResponse($json)
 {
     $result = new StringDatum();
     $result->setValue((string) $json);
     return $result;
 }