/**
* Finds the occurrence of the events in the next months
*
* @param cal the calendar object
* @param lastDay if <tt>true</tt> it will return the last day of the month
* @param period the number of months to add
* @return the calendar object with set date
*/
private Calendar incrementMonths(Calendar cal, boolean lastDay, int period) {
int dayOfMonth = patternSpecific1;
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.add(Calendar.MONTH, period);
if (lastDay || (cal.getActualMaximum(Calendar.DAY_OF_MONTH) < dayOfMonth))
dayOfMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
cal.set(Calendar.DAY_OF_MONTH, dayOfMonth);
return cal;
}
/**
* Finds the occurrence of the events in the next months
*
* @param startDate the start date if the calendar item
* @param dayOfWeekInMonth the number of week days occurrences
* @return the date of the next occurrence
*/
private Date getMonthNStartDate(Date startDate, int dayOfWeekInMonth) {
Calendar cal = Calendar.getInstance();
cal.setTime(startDate);
if (dayOfWeekInMonth == -1) {
Date result = null;
cal.set(Calendar.DAY_OF_WEEK_IN_MONTH, dayOfWeekInMonth);
for (int day : allowedDaysOfWeek) {
cal.set(Calendar.DAY_OF_WEEK, day);
if (result == null || result.before(cal.getTime())) result = cal.getTime();
}
return result;
} else
while (dayOfWeekInMonth > 0) {
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
if (allowedDaysOfWeek.contains(dayOfWeek)) dayOfWeekInMonth--;
if (dayOfWeekInMonth > 0) cal.add(Calendar.DAY_OF_MONTH, 1);
}
return cal.getTime();
}
/**
* Finds the next occurrence for monthly Nth recurrence.
*
* @param startDate the start date of the previous calendar item.
* @param endDate the end date of the previous calendar item.
* @return the next item
*/
public CalendarItemTimerTask nextMonthN(Date startDate, Date endDate) {
int dayOfWeekInMonth = (patternSpecific2 == 5 ? -1 : patternSpecific2);
long duration = sourceTask.getEndDate().getTime() - sourceTask.getStartDate().getTime();
Calendar cal = Calendar.getInstance();
cal.setTime(startDate);
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.add(Calendar.MONTH, period);
cal.setTime(getMonthNStartDate(cal.getTime(), dayOfWeekInMonth));
Date currentDate = new Date();
if (cal.getTimeInMillis() + duration < currentDate.getTime()) {
Calendar cal2 = Calendar.getInstance();
cal2.setTime(currentDate);
int years = cal2.get(Calendar.YEAR) - cal.get(Calendar.YEAR);
int months = (years * 12) + (cal2.get(Calendar.MONTH) - cal.get(Calendar.MONTH));
int monthsToAdd = months;
monthsToAdd -= months % period;
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.add(Calendar.MONTH, monthsToAdd);
cal.setTime(getMonthNStartDate(cal.getTime(), dayOfWeekInMonth));
if (cal.getTimeInMillis() + duration < currentDate.getTime()) {
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.add(Calendar.MONTH, monthsToAdd);
cal.setTime(getMonthNStartDate(cal.getTime(), dayOfWeekInMonth));
}
}
Calendar cal2 = (Calendar) cal.clone();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
while (deletedInstances.contains(cal.getTime())) {
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.add(Calendar.MONTH, period);
startDate = null;
for (int dayOfWeek : allowedDaysOfWeek) {
cal.set(Calendar.DAY_OF_WEEK, dayOfWeek);
cal.set(Calendar.DAY_OF_WEEK_IN_MONTH, dayOfWeekInMonth);
if ((cal.after(startDate) && dayOfWeekInMonth == -1)
|| (cal.before(startDate) && dayOfWeekInMonth != -1)
|| startDate == null) {
startDate = cal.getTime();
cal2.set(Calendar.YEAR, cal.get(Calendar.YEAR));
cal2.set(Calendar.MONTH, cal.get(Calendar.MONTH));
cal2.set(Calendar.DATE, cal.get(Calendar.DATE));
}
}
}
startDate = cal2.getTime();
endDate = new Date(startDate.getTime() + duration);
if (dateOutOfRange(endDate)) return null;
boolean executeNow = false;
if (startDate.before(currentDate)) {
executeNow = true;
}
return new CalendarItemTimerTask(
sourceTask.getStatus(), startDate, endDate, sourceTask.getId(), executeNow, this);
}
/**
* Calculates and creates the next calendar item.
*
* @param previousStartDate the start date of the previous occurrence.
* @param previousEndDate the end date of the previous occurrence.
* @return the new calendar item or null if there are no more calendar items from that recurrent
* series.
*/
public CalendarItemTimerTask next(Date previousStartDate, Date previousEndDate) {
if (dateOutOfRange(new Date())) {
return null;
}
Date startDate = previousStartDate;
Date endDate = null;
boolean executeNow = false;
long duration = sourceTask.getEndDate().getTime() - sourceTask.getStartDate().getTime();
switch (patternType) {
case Day:
{
startDate = new Date(startDate.getTime() + period * 60000);
endDate = new Date(previousEndDate.getTime() + period * 60000);
Date currentDate = new Date();
if (endDate.before(currentDate)) {
long offset = currentDate.getTime() - endDate.getTime();
offset -= offset % (period * 60000);
if (endDate.getTime() + offset < currentDate.getTime()) {
offset += period * 60000;
}
startDate = new Date(startDate.getTime() + offset);
}
Calendar cal = Calendar.getInstance();
cal.setTime(startDate);
Calendar cal2 = (Calendar) cal.clone();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
while (deletedInstances.contains(cal.getTime())) {
cal.add(Calendar.MINUTE, period);
cal2.add(Calendar.MINUTE, period);
}
if (dateOutOfRange(cal.getTime())) {
return null;
}
startDate = cal2.getTime();
endDate = new Date(startDate.getTime() + duration);
if (startDate.before(currentDate)) {
executeNow = true;
}
return new CalendarItemTimerTask(
sourceTask.getStatus(), startDate, endDate, sourceTask.getId(), executeNow, this);
}
case Week:
{
Calendar cal = Calendar.getInstance();
/** The enum for the firstDow field is the same as Calendar day of week enum + 1 day */
cal.setFirstDayOfWeek(firstDow + 1);
cal.setTime(startDate);
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
int index = allowedDaysOfWeek.indexOf(dayOfWeek);
if (++index < allowedDaysOfWeek.size()) {
cal.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(index));
startDate = cal.getTime();
endDate = new Date(startDate.getTime() + duration);
} else {
cal.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(0));
cal.add(Calendar.WEEK_OF_YEAR, period);
startDate = cal.getTime();
endDate = new Date(startDate.getTime() + duration);
}
Date currentDate = new Date();
if (endDate.before(currentDate)) {
cal.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(0));
endDate = new Date(cal.getTimeInMillis() + duration);
long offset = (currentDate.getTime() - endDate.getTime());
// 1 week = 604800000 is milliseconds
offset -= offset % (period * 604800000);
if (endDate.getTime() + offset < currentDate.getTime()) {
cal.add(Calendar.WEEK_OF_YEAR, (int) (offset / (period * 604800000)));
int i = 1;
while (((cal.getTimeInMillis() + duration) < (currentDate.getTime()))) {
if (i == allowedDaysOfWeek.size()) {
cal.add(Calendar.WEEK_OF_YEAR, period);
i = 0;
}
cal.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(i));
i++;
}
startDate = cal.getTime();
} else {
startDate = new Date(cal.getTimeInMillis() + offset);
}
}
cal.setTime(startDate);
Calendar cal2 = (Calendar) cal.clone();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
index = allowedDaysOfWeek.indexOf(dayOfWeek) + 1;
while (deletedInstances.contains(cal.getTime())) {
if (index >= allowedDaysOfWeek.size()) {
index = 0;
cal.add(Calendar.WEEK_OF_YEAR, period);
cal2.add(Calendar.WEEK_OF_YEAR, period);
}
cal.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(index));
cal2.set(Calendar.DAY_OF_WEEK, allowedDaysOfWeek.get(index));
index++;
}
startDate = cal2.getTime();
endDate = new Date(startDate.getTime() + duration);
if (dateOutOfRange(endDate)) return null;
if (startDate.before(currentDate)) {
executeNow = true;
}
return new CalendarItemTimerTask(
sourceTask.getStatus(), startDate, endDate, sourceTask.getId(), executeNow, this);
}
case Month:
case MonthEnd:
case HjMonth:
case HjMonthEnd:
{
return nextMonth(startDate, endDate, false);
}
case MonthNth:
case HjMonthNth:
{
if (patternSpecific1 == 0x7f && patternSpecific2 == 0x05) {
return nextMonth(startDate, endDate, true);
}
return nextMonthN(startDate, endDate);
}
}
return null;
}