Example usage for java.util Calendar clone

Introduction

In this page you can find the example usage for java.util Calendar clone.

Prototype

@Override
public Object clone()

Source Link

Document

Creates and returns a copy of this object.

Usage

From source file:org.jahia.utils.DateUtils.java

/**
 * Returns the end of the day (23:59:59:999) for the specified date.
 * //from  w ww  .ja va2  s  . c o  m
 * @param date the date to be processed
 * @return the end of the day (23:59:59:999) for the specified date
 */
public static Calendar dayEnd(Calendar date) {
    Calendar c = (Calendar) date.clone();

    c.set(Calendar.HOUR_OF_DAY, c.getMaximum(Calendar.HOUR_OF_DAY));
    c.set(Calendar.MINUTE, c.getMaximum(Calendar.MINUTE));
    c.set(Calendar.SECOND, c.getMaximum(Calendar.SECOND));
    c.set(Calendar.MILLISECOND, c.getMaximum(Calendar.MILLISECOND));

    return c;
}

From source file:org.jahia.utils.DateUtils.java

/**
 * Returns the start of the day (00:00:00:000) for the specified date.
 * /*w w  w  .j av  a  2  s.c o  m*/
 * @param date the date to be processed
 * @return the start of the day (00:00:00:000) for the specified date
 */
public static Calendar dayStart(Calendar date) {
    Calendar c = (Calendar) date.clone();

    c.set(Calendar.HOUR_OF_DAY, c.getMinimum(Calendar.HOUR_OF_DAY));
    c.set(Calendar.MINUTE, c.getMinimum(Calendar.MINUTE));
    c.set(Calendar.SECOND, c.getMinimum(Calendar.SECOND));
    c.set(Calendar.MILLISECOND, c.getMinimum(Calendar.MILLISECOND));

    return c;
}

From source file:Main.java

/**
 * Add the given number of days to the calendar and convert to Date.
 *
 * @param calendar/*from w w w  .  ja v a2s. c  o  m*/
 *            The calendar to add to.
 * @param days
 *            The number of days to add.
 * @return The date object given by the modified calendar.
 */
private static Date rollGetDate(Calendar calendar, int days) {
    Calendar easterSunday = (Calendar) calendar.clone();
    easterSunday.add(Calendar.DATE, days);
    return easterSunday.getTime();
}

From source file:Main.java

static int daysBetween(Calendar day1, Calendar day2) {
    /**/*from  w  w w  . j  a  v a  2 s .c  o  m*/
     * Saved some effort using the solution described here,
     * http://stackoverflow.com/a/28865648/1587370
     */
    Calendar dayOne = (Calendar) day1.clone(), dayTwo = (Calendar) day2.clone();

    if (dayOne.get(Calendar.YEAR) == dayTwo.get(Calendar.YEAR)) {
        return Math.abs(dayOne.get(Calendar.DAY_OF_YEAR) - dayTwo.get(Calendar.DAY_OF_YEAR));
    } else {
        if (dayTwo.get(Calendar.YEAR) > dayOne.get(Calendar.YEAR)) {
            //swap them
            Calendar temp = dayOne;
            dayOne = dayTwo;
            dayTwo = temp;
        }
        int extraDays = 0;

        int dayOneOriginalYearDays = dayOne.get(Calendar.DAY_OF_YEAR);

        while (dayOne.get(Calendar.YEAR) > dayTwo.get(Calendar.YEAR)) {
            dayOne.add(Calendar.YEAR, -1);
            // getActualMaximum() important for leap years
            extraDays += dayOne.getActualMaximum(Calendar.DAY_OF_YEAR);
        }

        return extraDays - dayTwo.get(Calendar.DAY_OF_YEAR) + dayOneOriginalYearDays;
    }
}

From source file:CalendarUtilsTest.java

/**
 * This checks that this is a 7 element iterator of Calendar objects
 * that are dates (no time), and exactly 1 day spaced after each other.
 *//*from   w ww. j  a  v  a  2 s.  c  o m*/
private static void assertWeekIterator(Iterator it, Calendar start) {
    Calendar end = (Calendar) start.clone();
    end.add(Calendar.DATE, 6);

    assertWeekIterator(it, start, end);
}

From source file:org.eclipse.smarthome.binding.astro.internal.util.DateTimeUtils.java

/**
 * Returns the end of day from the calendar object.
 *//*from  w w w.  j  a  v a 2  s. c om*/
public static Calendar endOfDayDate(Calendar calendar) {
    Calendar cal = (Calendar) calendar.clone();
    cal = DateUtils.ceiling(cal, Calendar.DATE);
    cal.add(Calendar.MILLISECOND, -1);
    return cal;
}

From source file:nl.strohalm.cyclos.utils.NamedPeriod.java

/**
 * Makes a defaultperiod for the form. It calculates the last quarter which was finished via the getLastQuarter() method. Then it calculates the
 * starting and ending day for this period. However, if the needed quarter is the last of a year, then it returns a whole year, in stead of a
 * whole quarter. In this case, the enddate is the same as it would have been with the quarter. The name of the Period is generated via the
 * produceName method/*w  w w  . j  a v a 2  s.  co m*/
 * @param aDate returns the last completed quarter which falls before this date. So if this date is january 1st, the method returns quarter 4 of
 * the previous year (octobre 1st to decembre 31st)
 * @return a quarterly period
 * @see #getLastQuarter()
 * @see #produceName(int, int)
 */
public static NamedPeriod getQuarterPeriod(final Calendar aDate) {
    int year = aDate.get(Calendar.YEAR);
    final int quarter = getLastQuarter(aDate);
    final int endMonth = (3 * quarter) - 3;
    final Calendar endDay = new GregorianCalendar(year, endMonth, 1, 0, 0, 0);
    final Calendar startDay = (Calendar) endDay.clone();
    if (quarter == 1) {
        startDay.add(Calendar.YEAR, -1);
        year--;
    } else {
        startDay.add(Calendar.MONTH, -3);
    }
    endDay.add(Calendar.MILLISECOND, -1); // do not include the endday, by distracting one millisecond from the first of next month
    final NamedPeriod period = new NamedPeriod(startDay, endDay, produceName(year, quarter));
    return period;
}

From source file:org.eclipse.smarthome.binding.astro.internal.util.DateTimeUtils.java

/**
 * Converts the time (hour.minute) to a calendar object.
 *///from w ww  . j  a va 2  s . c  o m
public static Calendar timeToCalendar(Calendar calendar, double time) {
    if (time < 0.0) {
        return null;
    }
    Calendar cal = (Calendar) calendar.clone();
    int hour = 0;
    int minute = 0;
    if (time == 24.0) {
        cal.add(Calendar.DAY_OF_MONTH, 1);
    } else {
        hour = (int) time;
        minute = (int) ((time * 100) - (hour * 100));
    }
    cal.set(Calendar.HOUR_OF_DAY, hour);
    cal.set(Calendar.MINUTE, minute);
    return DateUtils.truncate(cal, Calendar.MINUTE);
}

From source file:com.espertech.esper.epl.datetime.calop.CalendarOpPlusFastAddHelper.java

public static CalendarOpPlusFastAddResult computeNextDue(long currentTime, TimePeriod timePeriod,
        Calendar reference) {
    if (reference.getTimeInMillis() > currentTime) {
        return new CalendarOpPlusFastAddResult(0, reference);
    }/*from ww  w  .  ja va2 s .c o  m*/

    // add one time period
    Calendar work = (Calendar) reference.clone();
    if (DEBUG && log.isDebugEnabled()) {
        log.debug("Work date is " + DateTime.print(work));
    }

    CalendarOpPlusMinus.actionSafeOverflow(work, 1, timePeriod);
    long inMillis = work.getTimeInMillis();
    if (inMillis > currentTime) {
        return new CalendarOpPlusFastAddResult(1, work);
    }
    if (DEBUG && log.isDebugEnabled()) {
        log.debug("Work date is " + DateTime.print(work));
    }

    long factor = 1;

    // determine multiplier
    long deltaCurrentToStart = currentTime - reference.getTimeInMillis();
    long deltaAddedOne = work.getTimeInMillis() - reference.getTimeInMillis();
    double multiplierDbl = (deltaCurrentToStart / deltaAddedOne) - 1;
    long multiplierRoundedLong = (long) multiplierDbl;

    // handle integer max
    while (multiplierRoundedLong > Integer.MAX_VALUE) {
        CalendarOpPlusMinus.actionSafeOverflow(work, Integer.MAX_VALUE, timePeriod);
        factor += Integer.MAX_VALUE;
        multiplierRoundedLong -= Integer.MAX_VALUE;
        if (DEBUG && log.isDebugEnabled()) {
            log.debug("Work date is " + DateTime.print(work) + " factor " + factor);
        }
    }

    // add
    int multiplierRoundedInt = (int) multiplierRoundedLong;
    CalendarOpPlusMinus.actionSafeOverflow(work, multiplierRoundedInt, timePeriod);
    factor += multiplierRoundedInt;

    // if below, add more
    if (work.getTimeInMillis() <= currentTime) {
        while (work.getTimeInMillis() <= currentTime) {
            CalendarOpPlusMinus.actionSafeOverflow(work, 1, timePeriod);
            factor += 1;
            if (DEBUG && log.isDebugEnabled()) {
                log.debug("Work date is " + DateTime.print(work) + " factor " + factor);
            }
        }
        return new CalendarOpPlusFastAddResult(factor, work);
    }

    // we are over
    while (work.getTimeInMillis() > currentTime) {
        CalendarOpPlusMinus.actionSafeOverflow(work, -1, timePeriod);
        factor -= 1;
        if (DEBUG && log.isDebugEnabled()) {
            log.debug("Work date is " + DateTime.print(work) + " factor " + factor);
        }
    }
    CalendarOpPlusMinus.actionSafeOverflow(work, 1, timePeriod);
    if (DEBUG && log.isDebugEnabled()) {
        log.debug("Work date is " + DateTime.print(work) + " factor " + factor);
    }
    return new CalendarOpPlusFastAddResult(factor + 1, work);
}

From source file:Main.java

/**
 * <p>Truncate this date, leaving the field specified as the most
 * significant field.</p>//from w ww.ja v  a2 s.  c  om
 *
 * <p>For example, if you had the datetime of 28 Mar 2002
 * 13:45:01.231, if you passed with HOUR, it would return 28 Mar
 * 2002 13:00:00.000.  If this was passed with MONTH, it would
 * return 1 Mar 2002 0:00:00.000.</p>
 * 
 * @param date  the date to work with
 * @param field  the field from <code>Calendar</code>
 *  or <code>SEMI_MONTH</code>
 * @return the rounded date (a different object)
 * @throws IllegalArgumentException if the date is <code>null</code>
 * @throws ArithmeticException if the year is over 280 million
 */
public static Calendar truncate(Calendar date, int field) {
    if (date == null) {
        throw new IllegalArgumentException("The date must not be null");
    }
    Calendar truncated = (Calendar) date.clone();
    modify(truncated, field, false);
    return truncated;
}