org.rapla.components.util
Class DateTools

java.lang.Object
  org.rapla.components.util.DateTools

public abstract class DateTools
extends Object

Tools for manipulating dates. At the moment of writing rapla internaly stores all appointments in the GMT timezone.

Field Summary

static int	DAYS_PER_WEEK
static TimeZone	GMT
static long	MILLISECONDS_PER_DAY
static long	MILLISECONDS_PER_HOUR
static long	MILLISECONDS_PER_MINUTE
static long	MILLISECONDS_PER_WEEK

Constructor Summary

DateTools()

Method Summary

static Date	addDay(Date date) Monday 24:00 = tuesday 0:00.
static Date	addDays(Date date, int days) see #addDay
static long	countDays(Date start, Date end)
static Calendar	createGMTCalendar()
static void	cutDate(Calendar calendar) sets time of day to 0:00.
static Date	cutDate(Date date) sets time of day to 0:00.
static long	cutDate(long date) sets time of day to 0:00.
static Date	fillDate(Date date)
static long	fillDate(long date) sets time of day to 0:00 and increases day.
static int	getHourOfDay(long date)
static int	getMinuteOfHour(long date)
static TimeZone	getTimeZone() same as TimeZone.getTimeZone("GMT").
static boolean	isMidnight(Date date)
static boolean	isMidnight(long date)
static boolean	isSameDay(Calendar calendar, Date d1, Date d2) uses the calendar-object for date comparison.
static boolean	isSameDay(long d1, long d2) returns if the two dates are one the same date.
static Date	subDay(Date date)
static Date	subDays(Date date, int days)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DAYS_PER_WEEK

public static final int DAYS_PER_WEEK

See Also:

Constant Field Values

MILLISECONDS_PER_MINUTE

public static final long MILLISECONDS_PER_MINUTE

See Also:

Constant Field Values

MILLISECONDS_PER_HOUR

public static final long MILLISECONDS_PER_HOUR

See Also:

Constant Field Values

MILLISECONDS_PER_DAY

public static final long MILLISECONDS_PER_DAY

See Also:

Constant Field Values

MILLISECONDS_PER_WEEK

public static final long MILLISECONDS_PER_WEEK

See Also:

Constant Field Values

GMT

public static TimeZone GMT

Constructor Detail

DateTools

public DateTools()

Method Detail

getHourOfDay

public static int getHourOfDay(long date)

getMinuteOfHour

public static int getMinuteOfHour(long date)

cutDate

public static long cutDate(long date)

sets time of day to 0:00.

See Also:

cutDate(Date)

isMidnight

public static boolean isMidnight(long date)

isMidnight

public static boolean isMidnight(Date date)

cutDate

public static void cutDate(Calendar calendar)

sets time of day to 0:00.

See Also:

cutDate(Date)

cutDate

public static Date cutDate(Date date)

sets time of day to 0:00.

getTimeZone

public static TimeZone getTimeZone()

same as TimeZone.getTimeZone("GMT").

fillDate

public static long fillDate(long date)

sets time of day to 0:00 and increases day.

See Also:

fillDate(Date)

fillDate

public static Date fillDate(Date date)

addDay

public static Date addDay(Date date)

Monday 24:00 = tuesday 0:00. But the first means end of monday and the second start of tuesday. The default DateFormat always displays tuesday. If you want to edit the first interpretation in calendar components. call addDay() to add 1 day to the given date before displaying and subDay() for mapping a day back after editing.

See Also:

subDay(java.util.Date), addDays(java.util.Date, int)

addDays

public static Date addDays(Date date,
                           int days)

see #addDay

subDay

public static Date subDay(Date date)

See Also:

addDay(java.util.Date), subDays(java.util.Date, int)

subDays

public static Date subDays(Date date,
                           int days)

See Also:

addDay(java.util.Date)

isSameDay

public static boolean isSameDay(long d1,
                                long d2)

returns if the two dates are one the same date. Dates must be in GMT

isSameDay

public static boolean isSameDay(Calendar calendar,
                                Date d1,
                                Date d2)

uses the calendar-object for date comparison. Use this for non GMT Dates

countDays

public static long countDays(Date start,
                             Date end)

createGMTCalendar

public static Calendar createGMTCalendar()