eu.webtoolkit.jwt
Class WDate

java.lang.Object
  eu.webtoolkit.jwt.WDate

All Implemented Interfaces:

java.lang.Comparable<WDate>

public class WDate
extends java.lang.Object
implements java.lang.Comparable<WDate>

Class which holds a date on the gregorian calendar, specified as day/month/year. A valid date may be specified by year, month, and day of month (using the WDate(int, int, int) constructor, or the setDate(int year, int month, int day) method). When attempting to specify an invalid date (with an impossible combination of year/month/date) an IllegalArgumentException will be thrown. The class provides a flexible way for converting between strings and dates. Use toString() to convert to strings, and fromString() for parsing strings. Both methods take a format string, and the same format syntax is supported by both methods. Simple operations are supported to compare dates, or to calculate with dates.

Constructor Summary

WDate(java.util.Date date)
Specify a date by a Date object.

WDate(int year, int month, int day)
Specify a date by year, month (1-12), and day (1-31) When the date is invalid, an IllegalArgumentException is thrown.

WDate(int year, int month, int day, int hour, int minute, int second)
Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59) When the date is invalid, an IllegalArgumentException is thrown.

WDate(int year, int month, int day, int hour, int minute, int second, int millisecond)
Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59), millisecond (0 - 999) When the date is invalid, an IllegalArgumentException is thrown.

Method Summary

WDate	addDays(int ndays) Add days to a date.
WDate	addMilliseconds(int nMilliseconds) Adds milliseconds.
WDate	addMonths(int nmonths) Add months to a date.
WDate	addSeconds(int nSeconds) Adds seconds.
WDate	addYears(int nyears) Add years to a date.
boolean	after(WDate when) Tests if this date is after the specified date.
boolean	before(WDate when) Tests if this date is after the specified date.
int	compareTo(WDate o) Compares this WDate object with the specified WDate object for order.
boolean	equals(java.lang.Object other) Compares two dates for equality.
static WDate	fromJulianDay(int jd) Converts a Julian Day jd to a WDate.
static WDate	fromString(java.lang.String text) Parse a WString to a date using a default format.
static WDate	fromString(java.lang.String text, java.lang.String format) Parse a String to a date using a specified format.
static WDate	getCurrentDate() Construct a date for the current client date.
static WDate	getCurrentServerDate() Construct a date for the current server date.
java.util.Date	getDate() Returns the internal Date object.
int	getDay() Day of month (1-31)
int	getDayOfWeek() Day of week (1-7)
int	getDaysTo(WDate date) Returns the number of days from this date to date.
static java.lang.String	getDefaultFormat() Returns the default date format.
int	getHour() Hour (0-24)
static java.lang.String	getLongDayName(int weekday) Returns the long day name.
static java.lang.String	getLongMonthName(int month) Returns the long month name.
int	getMillisecond() Millisecond (0-999)
int	getMillisecondsTo(WDate d) Returns the difference between to time values (in milliseconds).
int	getMinute() Minute (0-59)
int	getMonth() Month (1-12)
int	getSecond() Second (0-59)
int	getSecondsTo(WDate d) Returns the difference between to time values (in seconds).
static java.lang.String	getShortDayName(int weekday) Returns the short day name.
static java.lang.String	getShortMonthName(int month) Returns the short month name.
java.lang.String	getTimeTo(WDate other, int minValue) Returns the difference between two WDate values (as text).
int	getYear() Year
int	hashCode() Returns a hash code value for the object.
void	setDate(int year, int month, int day) Set a date by year, month (1-12), day (1-31) When the new date is invalid, an IllegalArgumentException is thrown.
void	setDate(int year, int month, int day, int hour, int minute, int second) Set a date by year, month (1-12), and day (1-31), hour (0-23), minute (0-59), second (0 - 59).
void	setDate(int year, int month, int day, int hour, int minute, int second, int millisecond) Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59), millisecond (0 - 999) When the new date is invalid, an IllegalArgumentException is thrown.
void	setTime(int hour, int minute) Set this date's time by hour (0-23) and minute (0-59).
void	setTime(int hour, int minute, int second) Set this date's time by hour (0-23), minute (0-59) and second (0 - 59).
void	setTime(int hour, int minute, int second, int millisecond) Set this date's time by hour (0-23), minute (0-59), second (0 - 59) and millisecond (0 - 999).
int	toJulianDay() Converts the date to a Julian day.
java.lang.String	toString() Format this date to a String using a default format.
java.lang.String	toString(java.lang.String format) Format this date to a WString using a specified format.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WDate

public WDate(int year,
             int month,
             int day,
             int hour,
             int minute,
             int second,
             int millisecond)

Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59), millisecond (0 - 999) When the date is invalid, an IllegalArgumentException is thrown.

See Also:

setDate(int year, int month, int day, int hour, int minute, int second, int millisecond)

WDate

public WDate(int year,
             int month,
             int day,
             int hour,
             int minute,
             int second)

Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59) When the date is invalid, an IllegalArgumentException is thrown.

See Also:

setDate(int year, int month, int day, int hour, int minute, int second)

WDate

public WDate(int year,
             int month,
             int day)

Specify a date by year, month (1-12), and day (1-31) When the date is invalid, an IllegalArgumentException is thrown.

See Also:

setDate(int year, int month, int day), getYear(), getMonth(), getDay()

WDate

public WDate(java.util.Date date)

Specify a date by a Date object.

Method Detail

setDate

public void setDate(int year,
                    int month,
                    int day,
                    int hour,
                    int minute,
                    int second,
                    int millisecond)

Set a date by year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0 - 59), millisecond (0 - 999) When the new date is invalid, an IllegalArgumentException is thrown.

See Also:

WDate(int year, int month, int day, int hour, int minute, int second, int millisecond), getYear(), getMonth(), getDay(), getHour(), getMinute(), getSecond(), getMillisecond()

setDate

public void setDate(int year,
                    int month,
                    int day)

Set a date by year, month (1-12), day (1-31) When the new date is invalid, an IllegalArgumentException is thrown.

See Also:

setDate(int, int, int, int, int, int)

setDate

public void setDate(int year,
                    int month,
                    int day,
                    int hour,
                    int minute,
                    int second)

Set a date by year, month (1-12), and day (1-31), hour (0-23), minute (0-59), second (0 - 59). When the new date is invalid, an IllegalArgumentException is thrown.

See Also:

setDate(int, int, int, int, int, int, int)

setTime

public void setTime(int hour,
                    int minute,
                    int second,
                    int millisecond)

Set this date's time by hour (0-23), minute (0-59), second (0 - 59) and millisecond (0 - 999). When the new date is invalid, an IllegalArgumentException is thrown.

setTime

public void setTime(int hour,
                    int minute,
                    int second)

Set this date's time by hour (0-23), minute (0-59) and second (0 - 59). When the new date is invalid, an IllegalArgumentException is thrown.

setTime

public void setTime(int hour,
                    int minute)

Set this date's time by hour (0-23) and minute (0-59). When the new date is invalid, an IllegalArgumentException is thrown.

addSeconds

public WDate addSeconds(int nSeconds)

Adds seconds. Returns a time that is nSeconds seconds later than this time. Negative values for nSeconds will result in a time that is as many seconds earlier.

addMilliseconds

public WDate addMilliseconds(int nMilliseconds)

Adds milliseconds. Returns a time that is nMilliseconds milliseconds later than this time. Negative values for nMilliseconds will result in a time that is as many seconds earlier.

addDays

public WDate addDays(int ndays)

Add days to a date. Returns a date that is ndays later than this date. Negative values for ndays will result in a date that is as many days earlier.

See Also:

addMonths(int), addYears(int)

addMonths

public WDate addMonths(int nmonths)

Add months to a date. Returns a date that is the same day of the month, but nmonths later than this date. Negative values for nmonths will result in a date that is as many months earlier.

See Also:

addDays(int), addYears(int)

addYears

public WDate addYears(int nyears)

Add years to a date. Returns a date that is nyears later than this date. Negative values for nyears will result in a date that is as many years earlier.

See Also:

addDays(int), addMonths(int)

getYear

public int getYear()

Year

getMonth

public int getMonth()

Month (1-12)

getDay

public int getDay()

Day of month (1-31)

getHour

public int getHour()

Hour (0-24)

getMinute

public int getMinute()

Minute (0-59)

getSecond

public int getSecond()

Second (0-59)

getMillisecond

public int getMillisecond()

Millisecond (0-999)

getSecondsTo

public int getSecondsTo(WDate d)

Returns the difference between to time values (in seconds). This returns a value between -86400 s and 86400 s.

getMillisecondsTo

public int getMillisecondsTo(WDate d)

Returns the difference between to time values (in milliseconds). This returns a value between -86400000 ms and 86400000 ms.

getDayOfWeek

public int getDayOfWeek()

Day of week (1-7)

getDaysTo

public int getDaysTo(WDate date)

Returns the number of days from this date to date.

getTimeTo

public java.lang.String getTimeTo(WDate other,
                                  int minValue)

Returns the difference between two WDate values (as text). This returns a textual representation of the approximate difference between this time and other . The textual representation returns the difference as a number of seconds, minutes, hours, days, weeks, months, or years, using the coarsest unit that is more than \p minValue.

See Also:

getDaysTo(WDate), getSecondsTo(WDate)

before

public boolean before(WDate when)

Tests if this date is after the specified date.

Parameters:

when - - a date.

Returns:

true if and only if the instant represented by this Date object is strictly earlier than the instant represented by when; false otherwise.

after

public boolean after(WDate when)

Tests if this date is after the specified date.

Parameters:

when - - a date.

Returns:

true if and only if the instant represented by this Date object is strictly later than the instant represented by when; false otherwise.

equals

public boolean equals(java.lang.Object other)

Compares two dates for equality. The result is true if and only if the argument is not null and is a Date object that represents the same point in time, to the millisecond, as this object. Thus, two Date objects are equal if and only if the getTime method returns the same long value for both.

Overrides:

equals in class java.lang.Object

getDefaultFormat

public static java.lang.String getDefaultFormat()

Returns the default date format.

getCurrentDate

public static WDate getCurrentDate()

Construct a date for the current client date. This method uses browser information to retrieve the date that is configured in the client.

getCurrentServerDate

public static WDate getCurrentServerDate()

Construct a date for the current server date. This method returns the date as indicated by the system clock of the server.

getShortDayName

public static java.lang.String getShortDayName(int weekday)

Returns the short day name. Results (for given weekDay) are (default English):
"Mon" (1),
"Tue" (2),
"Wed" (3),
"Thu" (4),
"Fri" (5),
"Sat" (6),
"Sun" (7). The result is affected by localization using the "Wt.WDate.Mon" to "Wt.WDate.Sun" keys.

See Also:

getLongDayName(int)

getShortMonthName

public static java.lang.String getShortMonthName(int month)

Returns the short month name. Results (for given month) are (default English):
"Jan" (1),
"Feb" (2),
"Mar" (3),
"Apr" (4),
"May" (5),
"Jun" (6),
"Jul" (7),
"Aug" (8),
"Sep" (9),
"Oct" (10),
"Nov" (11),
"Dec" (12). The result is affected by localization using the "Wt.WDate.Jan" to "Wt.WDate.Dec" keys.

See Also:

getLongMonthName(int)

getLongDayName

public static java.lang.String getLongDayName(int weekday)

Returns the long day name. Results (for given weekDay) are (default English):
"Monday" (1),
"Tuesday" (2),
"Wednesday" (3),
"Thursday" (4),
"Friday" (5),
"Saturday" (6),
"Sunday" (7). The result is affected by localization using the "Wt.WDate.Monday" to "Wt.WDate.Sunday" keys.

See Also:

getShortDayName(int)

getLongMonthName

public static java.lang.String getLongMonthName(int month)

Returns the long month name. Results (for given month) are (default English):
"January" (1),
"February" (2),
"March" (3),
"April" (4),
"May" (5),
"June" (6),
"July" (7),
"August" (8),
"September" (9),
"October" (10),
"November" (11),
"December" (12). The result is affected by localization using the "Wt.WDate.January" to "Wt.WDate.December" keys.

See Also:

getShortDayName(int)

fromString

public static WDate fromString(java.lang.String text)

Parse a WString to a date using a default format. The default format is "ddd MMM d yyyy". For example, a date specified as: "Wed Aug 29 2007" will be parsed as a date that equals a date constructed as: WDate d = new WDate(2007,8,29); When the date could not be parsed or is not valid, null is returned.

See Also:

fromString(String, String)

fromString

public static WDate fromString(java.lang.String text,
                               java.lang.String format)

Parse a String to a date using a specified format. The format follows the same syntax as used by toString(String format). When the date could not be parsed or is not valid, null is returned.

See Also:

toString(String format)

toJulianDay

public int toJulianDay()

Converts the date to a Julian day.

See Also:

fromJulianDay(int)

toString

public java.lang.String toString()

Format this date to a String using a default format. The default format is "ddd MMM d yyyy".

Overrides:

toString in class java.lang.Object

See Also:

toString(String format), fromString(String)

toString

public java.lang.String toString(java.lang.String format)

Format this date to a WString using a specified format. The format is a string interpreted by SimpleDateFormat.

fromJulianDay

public static WDate fromJulianDay(int jd)

Converts a Julian Day jd to a WDate.

See Also:

toJulianDay()

getDate

public java.util.Date getDate()

Returns the internal Date object.

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(WDate o)

Compares this WDate object with the specified WDate object for order.

Specified by:

compareTo in interface java.lang.Comparable<WDate>