class TimeDimensionality {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    private final long begin;

    private final long end;

    private final int dimensionality;

    public TimeDimensionality(long begin, long end, String format) {
        Date beginDate = DateUtil.getDateByFormat(String.valueOf(begin), format);
        Date endDate = DateUtil.getDateByFormat(String.valueOf(end), format);
        this.dimensionality = getSuitableDimensionality(beginDate, endDate);
        if (dimensionality == AppStatsDao.MINUTE_DIMENSIONALITY) {
            this.begin = Long.parseLong(DateUtil.formatDate(beginDate, "yyyyMMddHHmm"));
        } else {
            this.begin = Long.parseLong(DateUtil.formatDate(beginDate, "yyyyMMddHH"));
        }

        if (dimensionality == AppStatsDao.MINUTE_DIMENSIONALITY) {
            this.end = Long.parseLong(DateUtil.formatDate(endDate, "yyyyMMddHHmm"));
        } else {
            this.end = Long.parseLong(DateUtil.formatDate(endDate, "yyyyMMddHH"));
        }
    }

    /**
     * 获取合适的维度
     */
    private int getSuitableDimensionality(Date begin, Date end) {<FILL_FUNCTION_BODY>}

}

        try {
            long s1 = begin.getTime();
            long s2 = end.getTime();
            long hour = (s2 - s1) / 1000 / 60 / 60;
            if (hour >= 48) {
                return AppStatsDao.HOUR_DIMENSIONALITY;
            } else {
                return AppStatsDao.MINUTE_DIMENSIONALITY;
            }
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
        }
        return AppStatsDao.MINUTE_DIMENSIONALITY;
    
<no_super_class>