protected function buildNumberFormat()
    {
        $lc = $this->getLocaleInfo();

        $format = new SwatI18NNumberFormat();

        $format->decimal_separator = $lc['decimal_point'];
        $format->thousands_separator = $lc['thousands_sep'];
        $format->grouping = $lc['grouping'];

        $this->number_format = $format;
    }