Package gnu.math

Class DateTime

java.lang.Object

java.lang.Number

gnu.math.Numeric

gnu.math.Quantity

gnu.math.DateTime

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class DateTime
extends Quantity
implements java.lang.Cloneable

Represents a date and/or time. Similar functionality as java.util.Calendar (and uses GregorianCalendar internally) but supports arithmetic. Can be for XML Schema date/time types, specifically as used in XPath/Xquery..

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	DATE_MASK
static int	DAY_MASK
static java.util.TimeZone	GMT
static int	HOURS_MASK
static int	MINUTES_MASK
static int	MONTH_MASK
static int	SECONDS_MASK
static int	TIME_MASK
static int	TIMEZONE_MASK
static int	YEAR_MASK

Fields inherited from class gnu.math.Numeric

CEILING, FLOOR, NONNEG_MOD, ROUND, TRUNCATE

Constructor Summary

Constructors

Constructor	Description
DateTime(int mask)
DateTime(int mask, java.util.GregorianCalendar calendar)

Method Summary

Modifier and Type	Method	Description
static DateTime	add(DateTime x, Duration y, int k)
Numeric	add(java.lang.Object y, int k)	Return this + k * obj.
static DateTime	addMinutes(DateTime x, int y)
Numeric	addReversed(Numeric x, int k)	Calculate x+k&this.
static DateTime	addSeconds(DateTime x, int y)
DateTime	adjustTimezone(int newOffset)
DateTime	cast(int newComponents)
static int	compare(DateTime date1, DateTime date2)	Return -1, 0, or 1, depending on which value is greater.
int	compare(java.lang.Object obj)	Return an integer for which of this or obj is larger.
int	components()
static int	daysInMonth(int month, int year)
int	getDay()
int	getHours()
int	getMinutes()
int	getMonth()
int	getNanoSecondsOnly()
int	getSecondsOnly()
int	getWholeSeconds()
int	getYear()
int	getZoneMinutes()
boolean	isExact()
static boolean	isLeapYear(int year)
boolean	isZero()
boolean	isZoneUnspecified()
static java.util.TimeZone	minutesToTimeZone(int minutes)	Get a TimeZone object for a given offset.
Complex	number()
static DateTime	parse(java.lang.String value, int mask)
void	setTimeZone(java.util.TimeZone timeZone)
static Duration	sub(DateTime date1, DateTime date2)
java.lang.String	toString()
void	toString(java.lang.StringBuffer sbuf)
void	toStringDate(java.lang.StringBuffer sbuf)
void	toStringTime(java.lang.StringBuffer sbuf)
static void	toStringZone(int minutes, java.lang.StringBuffer sbuf)
void	toStringZone(java.lang.StringBuffer sbuf)
Unit	unit()
DateTime	withZoneUnspecified()

Methods inherited from class gnu.math.Quantity

abs, add, compare, compareReversed, dimensions, div, divide, divReversed, doubleImagValue, doubleJmagValue, doubleKmagValue, doubleValue, im, imValue, jm, jmValue, km, kmValue, make, make, make, mul, mulReversed, neg, re, reValue, times, toString

Methods inherited from class gnu.math.Numeric

add, asNumericOrNull, div_inv, equals, floatValue, geq, grt, intValue, longValue, mul_ident, power, sub, toExact, toInexact

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Field Detail

YEAR_MASK

public static final int YEAR_MASK

See Also:

Constant Field Values

MONTH_MASK

public static final int MONTH_MASK

See Also:

Constant Field Values

DAY_MASK

public static final int DAY_MASK

See Also:

Constant Field Values

HOURS_MASK

public static final int HOURS_MASK

See Also:

Constant Field Values

MINUTES_MASK

public static final int MINUTES_MASK

See Also:

Constant Field Values

SECONDS_MASK

public static final int SECONDS_MASK

See Also:

Constant Field Values

TIMEZONE_MASK

public static final int TIMEZONE_MASK

See Also:

Constant Field Values

DATE_MASK

public static final int DATE_MASK

See Also:

Constant Field Values

TIME_MASK

public static final int TIME_MASK

See Also:

Constant Field Values

GMT

public static java.util.TimeZone GMT

Constructor Detail

DateTime

public DateTime(int mask)

DateTime

public DateTime(int mask,
                java.util.GregorianCalendar calendar)

Method Detail

components

public int components()

cast

public DateTime cast(int newComponents)

parse

public static DateTime parse(java.lang.String value,
                             int mask)

isLeapYear

public static boolean isLeapYear(int year)

daysInMonth

public static int daysInMonth(int month,
                              int year)

getYear

public int getYear()

getMonth

public int getMonth()

getDay

public int getDay()

getHours

public int getHours()

getMinutes

public int getMinutes()

getSecondsOnly

public int getSecondsOnly()

getWholeSeconds

public int getWholeSeconds()

getNanoSecondsOnly

public int getNanoSecondsOnly()

compare

public static int compare(DateTime date1,
                          DateTime date2)

Return -1, 0, or 1, depending on which value is greater.

compare

public int compare(java.lang.Object obj)

Description copied from class: Numeric

Return an integer for which of this or obj is larger. Return 1 if this>obj; 0 if this==obj; -1 if this<obj; -2 if this!=obj otherwise (for example if either is NaN); -3 if not comparable (incompatible types).

Overrides:

compare in class Quantity

sub

public static Duration sub(DateTime date1,
                           DateTime date2)

withZoneUnspecified

public DateTime withZoneUnspecified()

adjustTimezone

public DateTime adjustTimezone(int newOffset)

add

public static DateTime add(DateTime x,
                           Duration y,
                           int k)

addMinutes

public static DateTime addMinutes(DateTime x,
                                  int y)

addSeconds

public static DateTime addSeconds(DateTime x,
                                  int y)

add

public Numeric add(java.lang.Object y,
                   int k)

Description copied from class: Numeric

Return this + k * obj.

Overrides:

add in class Quantity

addReversed

public Numeric addReversed(Numeric x,
                           int k)

Description copied from class: Numeric

Calculate x+k&this.

Overrides:

addReversed in class Quantity

toStringDate

public void toStringDate(java.lang.StringBuffer sbuf)

toStringTime

public void toStringTime(java.lang.StringBuffer sbuf)

isZoneUnspecified

public boolean isZoneUnspecified()

getZoneMinutes

public int getZoneMinutes()

minutesToTimeZone

public static java.util.TimeZone minutesToTimeZone(int minutes)

Get a TimeZone object for a given offset.

Parameters:

minutes - timezone offset in minutes.

setTimeZone

public void setTimeZone(java.util.TimeZone timeZone)

toStringZone

public void toStringZone(java.lang.StringBuffer sbuf)

toStringZone

public static void toStringZone(int minutes,
                                java.lang.StringBuffer sbuf)

toString

public void toString(java.lang.StringBuffer sbuf)

toString

public java.lang.String toString()

Overrides:

toString in class Numeric

isExact

public boolean isExact()

Specified by:

isExact in class Numeric

isZero

public boolean isZero()

Specified by:

isZero in class Numeric

unit

public Unit unit()

Overrides:

unit in class Quantity

number

public Complex number()

Specified by:

number in class Quantity