/**
* 计算分割段数
*
* @param period 时段周期 [时|日|周|月]
* @param start 开始时间
* @param end 结束时间
* @return 段数
*/
private int countDays(Period period, Date start, Date end) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(start);
int count = 0;
while (calendar.getTime().before(end)) {
count++;
calendar.add(period.getField(), 1);
}
return count;
}
/**
* 检测时间分段合理性
*
* @param period 时段周期 [时|日|周|月]
* @param start 开始时间
* @param end 结束时间
*/
private void doCheckPeriod(Period period, Date start, Date end) throws ServiceException {
Calendar calendar = Calendar.getInstance();
calendar.setTime(start);
int count = 0, max = 200;
while (calendar.getTime().before(end)) {
if (count++ > max) {
throw new ServiceException("数据量偏大，请调整时间跨度再试！");
}
calendar.add(period.getField(), 1);
}
}
/**
* 填充数据
*
* @param list 数据库有效数据列表
* @return 填充的数据
*/
private <T extends TrendValue> List<T> fulldata(
List<T> list, DateFormat format, int field, Date start, Date end, Class<T> clazz) {
Map<String, T> map = tomap(list);
Calendar calendar = Calendar.getInstance();
calendar.setTime(start);
List<T> nlist = new ArrayList<>();
while (calendar.getTime().before(end)) {
String keytime = format.format(calendar.getTime());
T value = map.get(keytime);
if (value == null) {
value = AfReflecter.newInstance(clazz);
value.setEmpty();
value.setDate(keytime);
value.setTime(calendar.getTime());
nlist.add(value);
} else {
nlist.add(value);
map.remove(keytime);
}
calendar.add(field, 1);
}
for (Map.Entry<String, T> entry : map.entrySet()) {
nlist.add(entry.getValue());
}
return nlist;
}
/**
* 根据周期和便宜计算结束时间
*
* @param end 结束时间
* @param span 时间跨度
* @param offset 偏移
* @return 结束时间
*/
private Date timeEnd(Date end, Period span, Integer offset) {
if (span != null && offset != null /* && !Period.hour.equals(span)*/) {
DateFormat format = span.getFormat();
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(format.parse(format.format(calendar.getTime())));
} catch (ParseException e) {
e.printStackTrace();
}
calendar.add(span.getField(), offset + 1);
return calendar.getTime();
}
if (end == null) {
return timeEnd(new Date(), Period.year, 1000);
}
return end;
}
/**
* 根据周期和便宜计算开始时间
*
* @param start 开始时间
* @param span 时间跨度
* @param offset 偏移
* @return 开始时间
*/
private Date timeStart(Date start, Period span, Integer offset) {
if (span != null && offset != null) {
DateFormat format = span.getFormat();
Calendar calendar = Calendar.getInstance();
try {
calendar.setTime(format.parse(format.format(calendar.getTime())));
} catch (ParseException e) {
e.printStackTrace();
}
calendar.add(span.getField(), offset);
return calendar.getTime();
}
if (start == null) {
return timeStart(new Date(), Period.year, -1000);
}
return start;
}