if ($var instanceof Doctrine_Expression) {
            return true;
        } elseif ($var === null) {
            return true;
        } elseif (is_object($var)) {

// This applies to JSON backed values with \stdClass values

            return $type == 'object';
        } elseif (is_array($var)) {

// This MIGHT (according to JSON condition below) apply to JSON backed values

            return $type == 'array';
        }

        switch ($type) {
// [...]
            case 'array':
                return is_array($var);
            case 'object':
                return is_object($var);
            case 'json':

// Even IF we ever reach here, e.g. with already json_encode()'d string,
// condition fails as the only two possible options already yielded <false> in the beginning.

                return is_object($var) || is_array($var);
// [...]
        }