function setAlign($col_id, $align = self::CONSOLE_TABLE_ALIGN_LEFT) {
        switch ($align) {
            case self::CONSOLE_TABLE_ALIGN_CENTER:
                $pad = STR_PAD_BOTH;
                break;
            case self::CONSOLE_TABLE_ALIGN_RIGHT:
                $pad = STR_PAD_LEFT;
                break;
            default:
                $pad = STR_PAD_RIGHT;
                break;
        }
        $this->_col_align[$col_id] = $pad;
    }