diff options
Diffstat (limited to 'src/main/java/org/uic/barcode/ticket/api/utils/DateTimeUtils.java')
| -rw-r--r-- | src/main/java/org/uic/barcode/ticket/api/utils/DateTimeUtils.java | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/src/main/java/org/uic/barcode/ticket/api/utils/DateTimeUtils.java b/src/main/java/org/uic/barcode/ticket/api/utils/DateTimeUtils.java new file mode 100644 index 0000000..c8664a5 --- /dev/null +++ b/src/main/java/org/uic/barcode/ticket/api/utils/DateTimeUtils.java @@ -0,0 +1,239 @@ +package org.uic.barcode.ticket.api.utils;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Date;
+import java.util.TimeZone;
+import java.util.concurrent.TimeUnit;
+
+public class DateTimeUtils {
+
+ public static Long getDateDifference(Date issuingDate, Date localDate) {
+
+ if (issuingDate == null || localDate == null) return null;
+
+ Calendar startCal = Calendar.getInstance();
+ startCal.clear();
+ startCal.setTime(issuingDate);
+ startCal.setTimeZone(TimeZone.getTimeZone("UTC"));
+ startCal.set(Calendar.HOUR_OF_DAY, 0);
+ startCal.set(Calendar.MINUTE, 0);
+ startCal.set(Calendar.SECOND, 0);
+ startCal.set(Calendar.MILLISECOND, 0);
+ Date start = startCal.getTime();
+
+ Calendar endCal = Calendar.getInstance();
+ endCal.clear();
+ endCal.setTime(localDate);
+ endCal.setTimeZone(TimeZone.getTimeZone("UTC"));
+ endCal.set(Calendar.HOUR_OF_DAY, 0);
+ endCal.set(Calendar.MINUTE, 0);
+ endCal.set(Calendar.SECOND, 0);
+ endCal.set(Calendar.MILLISECOND, 0);
+ Date end = endCal.getTime();
+
+ long diff = TimeUnit.DAYS.convert(end.getTime() - start.getTime(), TimeUnit.MILLISECONDS );
+ //long diff = localDate.getTime() - issuingDate.getTime();
+ //long dayDiff = TimeUnit.DAYS.convert(diff, TimeUnit.MILLISECONDS);
+
+ return new Long(diff);
+
+ }
+
+ public static Long getDateDifferenceLocal(Date referenceDate, Date localDate) {
+
+ if (referenceDate == null || localDate == null) return null;
+
+ Calendar issuingCal = Calendar.getInstance();
+ issuingCal.clear();
+ issuingCal.setTime(referenceDate);
+ issuingCal.set(Calendar.HOUR_OF_DAY, 0);
+ issuingCal.set(Calendar.MINUTE, 0);
+ issuingCal.set(Calendar.SECOND, 0);
+ issuingCal.set(Calendar.MILLISECOND, 0);
+
+ Calendar fromCal = Calendar.getInstance();
+ fromCal.clear();
+ fromCal.setTime(localDate);
+ fromCal.set(Calendar.HOUR_OF_DAY, 0);
+ fromCal.set(Calendar.MINUTE, 0);
+ fromCal.set(Calendar.SECOND, 0);
+ fromCal.set(Calendar.MILLISECOND, 0);
+
+ long diff = localDate.getTime() - referenceDate.getTime();
+ long dayDiff = TimeUnit.DAYS.convert(diff, TimeUnit.MILLISECONDS);
+
+ return new Long(dayDiff);
+
+ }
+
+ public static Date getLocalDateFromDifference(Date issuingDate, int diff , Long time ) {
+
+ if (issuingDate == null) return null;
+
+ Calendar cal = Calendar.getInstance();
+ cal.clear();
+ cal.setTime(issuingDate);
+ cal.add(Calendar.DAY_OF_YEAR, diff);
+
+ if (time != null) {
+ int hours = time.intValue() / 60;
+ int minutes = time.intValue() - hours * 60;
+ cal.set(Calendar.HOUR_OF_DAY, hours);
+ cal.set(Calendar.MINUTE,minutes);
+ }
+
+ return cal.getTime();
+
+ }
+
+
+ public static void setTime(Calendar cal, Long time){
+
+ if (time != null) {
+ int hours = time.intValue() / 60;
+ int minutes = time.intValue() - hours * 60;
+ cal.set(Calendar.HOUR_OF_DAY, hours);
+ cal.set(Calendar.MINUTE,minutes);
+ }
+
+
+ }
+
+ public static Long getTime (Calendar cal) {
+
+ if (cal == null ||
+ !cal.isSet(Calendar.HOUR_OF_DAY) ||
+ !cal.isSet(Calendar.MINUTE) ) {
+ return null;
+ }
+
+ int time = cal.get(Calendar.HOUR_OF_DAY) * 60 + cal.get(Calendar.MINUTE);
+ return new Long (time );
+ }
+
+ public static Long getTime (Date date) {
+
+ Calendar cal = Calendar.getInstance();
+ cal.clear();
+ cal.setTime(date);
+
+ int time = cal.get(Calendar.HOUR_OF_DAY) * 60 + cal.get(Calendar.MINUTE);
+ return new Long (time );
+ }
+
+ public static Date getDate(Date issuingDate, Long date, Long time){
+
+ if (issuingDate == null) return null;
+
+ if (date == null) {
+ date = 0L;
+ }
+
+ Calendar issuingCal = Calendar.getInstance();
+ issuingCal.clear();
+ issuingCal.setTime(issuingDate);
+
+ Calendar cal = Calendar.getInstance();
+ cal.clear();
+ cal.set(Calendar.YEAR,issuingCal.get(Calendar.YEAR) );
+ cal.set(Calendar.DAY_OF_YEAR,issuingCal.get(Calendar.DAY_OF_YEAR) );
+
+ cal.add(Calendar.DAY_OF_YEAR, date.intValue());
+
+ if (time == null) {
+ DateTimeUtils.setTime(cal,0L);
+ } else {
+ DateTimeUtils.setTime(cal,time);
+ }
+ return cal.getTime();
+
+ }
+
+
+ /**
+ * Gets the UTC offset.
+ *
+ * @param date and time of the issuing date
+ * @param date and time of the departure
+ * @return the UTC offset in multiples of 15 minutes
+ * the offset needs to be added to local time to get the UTC time (UTC = local + offset)
+ */
+ public static Long getUTCoffset(Date local) {
+
+
+ Calendar cal = Calendar.getInstance();
+ cal.clear();
+ cal.setTime(local);
+
+ /*
+ * Returns the amount of time in milliseconds to add to UTC to get standard time in this
+ * time zone. Because this value is not affected by daylight saving time, it is called raw offset.
+ * If an underlying TimeZone implementation subclass supports historical GMT offset changes, the method
+ * returns the raw offset value of the current date. In Honolulu, for example, its raw offset
+ * changed from GMT-10:30 to GMT-10:00 in 1947, and this method
+ * always returns -36000000 milliseconds (i.e., -10 hours).
+ */
+ int minuteOffset = - cal.getTimeZone().getRawOffset()/ ( 1000 * 60 * 15 );
+
+ return new Long (minuteOffset);
+
+ }
+
+ public static Date getUTCDate(Date issuingDate, Long date, Long time, Long UTCOffset) {
+
+ if (issuingDate == null) return null;
+
+ if (UTCOffset == null) return null;
+
+ if (time == null) return null;
+
+ if (date == null) {
+ date = 0L;
+ }
+
+ Calendar issuingCal = Calendar.getInstance();
+ issuingCal.clear();
+ issuingCal.setTime(issuingDate);
+
+ Calendar cal = Calendar.getInstance();
+ cal.clear();
+ cal.set(Calendar.YEAR,issuingCal.get(Calendar.YEAR) );
+ cal.set(Calendar.DAY_OF_YEAR,issuingCal.get(Calendar.DAY_OF_YEAR) );
+ cal.add(Calendar.DAY_OF_YEAR, date.intValue());
+
+ int hours = time.intValue() / 60;
+ int minutes = time.intValue() - hours * 60;
+ cal.set(Calendar.HOUR_OF_DAY, hours);
+ cal.set(Calendar.MINUTE,minutes);
+
+ cal.add(Calendar.MINUTE, (int) (UTCOffset * 15) );
+
+ cal.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+ return cal.getTime();
+
+ }
+
+
+ public static Collection<Long> getActivatedDays(Date referenceDate, Collection<Date> days) {
+
+ ArrayList<Long> lDays = new ArrayList<Long>();
+
+ if (referenceDate == null) return lDays;
+
+ for (Date day : days) {
+ long dateDiff2 = DateTimeUtils.getDateDifference(referenceDate,day);
+ lDays.add(dateDiff2);
+ }
+
+ return lDays;
+
+ }
+
+ public static Date dateToUTC(Date date){
+ return new Date(date.getTime() - Calendar.getInstance().getTimeZone().getOffset(date.getTime()));
+ }
+
+}
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