public function getText($brief = false)
    {
        if ($this->components == 0) {
            return '';
        }

        $str = $this->formatNumber($this->value[0]);
        for ($i = 1; $i < $this->components; $i ++) {
            $str .= ($brief ? ' ' : ', ');
            $str .= $this->formatNumber($this->value[$i]);
        }

        return $str;
    }