agi.foundation.time

(agi.foundation.core-2025r2.jar)

Class GlobalPositioningSystemDate

java.lang.Object

agi.foundation.time.GlobalPositioningSystemDate

All Implemented Interfaces:

IEquatable<GlobalPositioningSystemDate>, ImmutableValueType, ValueType, IEquatableEpsilon<GlobalPositioningSystemDate>, Comparable<GlobalPositioningSystemDate>

public final class GlobalPositioningSystemDate
extends Object
implements Comparable<GlobalPositioningSystemDate>, IEquatable<GlobalPositioningSystemDate>, IEquatableEpsilon<GlobalPositioningSystemDate>, ImmutableValueType

A date and time format consisting of a week number and a time of week and utilizing the GlobalPositioningSystemTime (get) time standard.

Internally, this class stores the date as a week number, a day of the week, and a number of seconds into the day. This enables it to represent a date with the same precision as the JulianDate type.

Field Summary

Fields

Modifier and Type	Field and Description
static JulianDate	JulianDateOfEpoch The GPS epoch of 6 January 1980 00:00:00 UTC expressed as a JulianDate in the GlobalPositioningSystemTime (get).
static int	WeekWrapValue The number of weeks after which the week count wraps around to zero.

Constructor Summary

Constructors

Constructor and Description
GlobalPositioningSystemDate() Initializes a new instance.
GlobalPositioningSystemDate(GregorianDate date) Initializes a new instance from a GregorianDate.
GlobalPositioningSystemDate(int week, DayOfWeek dayOfWeek, double secondsOfDay) Initializes a new instance from a week number, a day of the week, and a number of seconds into the day.
GlobalPositioningSystemDate(int week, double secondsOfWeek) Initializes a new instance from a week number and a number of seconds into the week.
GlobalPositioningSystemDate(int year, int dayOfYear, int hour, int minute, int second) Initializes a new instance from the time parameters found in a PerformanceAssessmentRecord.
GlobalPositioningSystemDate(JulianDate date) Initializes a new instance from a JulianDate.
GlobalPositioningSystemDate(ZonedDateTime date) Initializes a new instance from a ZonedDateTime.

Method Summary

Modifier and Type	Method and Description
GlobalPositioningSystemDate	add(Duration duration) Adds a Duration to this date, producing a new date.
static GlobalPositioningSystemDate	add(GlobalPositioningSystemDate left, Duration right) Adds a Duration to a GlobalPositioningSystemDate, producing a new date.
GlobalPositioningSystemDate	addDays(double days) Adds the specified number of days to this date and returns the new date.
GlobalPositioningSystemDate	addSeconds(double seconds) Adds the specified number of seconds to this date and returns the new date.
int	compareTo(GlobalPositioningSystemDate other) Compares this instance with another instance of the same type.
static boolean	equals(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if the two instances are exactly equal.
boolean	equals(Object obj) Indicates whether another object is exactly equal to this instance.
boolean	equalsEpsilon(GlobalPositioningSystemDate other, double epsilon) Returns true if this date is within epsilon seconds of the specified date.
boolean	equalsType(GlobalPositioningSystemDate other) Indicates whether another instance of this type is exactly equal to this instance.
DayOfWeek	getDayOfWeek() Gets the day of the week.
double	getKPoints() Gets the K-Points (15-minute segments) since the most recent GPS epoch.
int	getRolloverCount() Gets the number of times that the GPS week counter has rolled over since GlobalPositioningSystemDate.JulianDateOfEpoch.
JulianDate	getRolloverDate() Gets the most recent rollover of the GPS week counter.
double	getSecondsOfDay() Gets the elapsed whole and fractional seconds since the start of the day.
double	getSecondsOfWeek() Gets the elapsed whole and fractional seconds since the start of the week.
double	getTotalDays() Gets the total number of whole and fractional days that have elapsed since GlobalPositioningSystemDate.JulianDateOfEpoch.
double	getTotalDaysSinceRollover() Gets the total number of whole and fractional days that have elapsed since RolloverDate (get).
int	getWeek() Gets the week number, which is the number of weeks since January 6, 1980.
int	getWeekSinceRollover() Gets the week number since the most recent GPS week rollover.
long	getZCounts() Gets the Z-Counts (1.5 second segments) since the most recent GPS Epoch.
static boolean	greaterThan(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if left occurs after right.
static boolean	greaterThanOrEqual(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if left occurs after or at the same time as right.
int	hashCode() Returns a hash code for this instance, which is suitable for use in hashing algorithms and data structures like a hash table.
static boolean	lessThan(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if left occurs before right.
static boolean	lessThanOrEqual(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if left occurs before or at the same time as right.
double	minutesDifference(GlobalPositioningSystemDate other) Computes the number of minutes that have elapsed from this date to the other date.
static boolean	notEquals(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Returns true if the two instances are not exactly equal.
double	secondsDifference(GlobalPositioningSystemDate other) Computes the number of seconds that have elapsed from this date to the other date.
GlobalPositioningSystemDate	subtract(Duration duration) Subtracts a Duration from this date, producing a new date.
Duration	subtract(GlobalPositioningSystemDate subtrahend) Subtracts another date from this date.
static GlobalPositioningSystemDate	subtract(GlobalPositioningSystemDate left, Duration right) Subtracts a Duration from a date, yielding a new GlobalPositioningSystemDate.
static Duration	subtract(GlobalPositioningSystemDate left, GlobalPositioningSystemDate right) Subtracts a date from another date, yielding a Duration.
ZonedDateTime	toDateTime() Converts this GPS Time to a ZonedDateTime with a default time standard of Global Positioning System Time.
JulianDate	toJulianDate() Returns a JulianDate that is equivalent to this instance.
String	toString() Returns the value of this GPS Time in RolloverCount (get):WeekSinceRollover (get):SecondsOfWeek (get), where RolloverCount (get) is the number of times that the GPS week counter has rolled over since GlobalPositioningSystemDate.JulianDateOfEpoch.

Methods inherited from class java.lang.Object

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

Field Detail

JulianDateOfEpoch

@Nonnull
public static final JulianDate JulianDateOfEpoch

The GPS epoch of 6 January 1980 00:00:00 UTC expressed as a JulianDate in the GlobalPositioningSystemTime (get).

WeekWrapValue

public static final int WeekWrapValue

The number of weeks after which the week count wraps around to zero.

See Also:

Constant Field Values

Constructor Detail

GlobalPositioningSystemDate

public GlobalPositioningSystemDate()

Initializes a new instance.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(int year,
                                   int dayOfYear,
                                   int hour,
                                   int minute,
                                   int second)

Initializes a new instance from the time parameters found in a PerformanceAssessmentRecord.

Parameters:

year - The year.

dayOfYear - The Julian day of year.

hour - The hour.

minute - The minute.

second - The Second.

Throws:

ArgumentOutOfRangeException - Thrown when the parameter dayOfYear is not between 1 and 366 inclusive.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(@Nonnull
                                   JulianDate date)

Initializes a new instance from a JulianDate.

Parameters:

date - The JulianDate from which to create this instance.

Throws:

ArgumentOutOfRangeException - Thrown if the given date is prior to the GlobalPositioningSystemDate.JulianDateOfEpoch.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(@Nonnull
                                   ZonedDateTime date)

Initializes a new instance from a ZonedDateTime.

Parameters:

date - The ZonedDateTime object from which to create this instance.

Throws:

ArgumentOutOfRangeException - Thrown if the given date is prior to the GlobalPositioningSystemDate.JulianDateOfEpoch.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(@Nonnull
                                   GregorianDate date)

Initializes a new instance from a GregorianDate.

Parameters:

date - The ZonedDateTime object from which to create this instance.

Throws:

ArgumentOutOfRangeException - Thrown if the given date is prior to the GlobalPositioningSystemDate.JulianDateOfEpoch.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(int week,
                                   double secondsOfWeek)

Initializes a new instance from a week number and a number of seconds into the week.

Parameters:

week - The GPS reference week number. Must be counted from the initial GPS Epoch (Jan 6, 1980).

secondsOfWeek - The number of seconds into the week, counted from Sunday (the first day of the week) at midnight.

GlobalPositioningSystemDate

public GlobalPositioningSystemDate(int week,
                                   @Nonnull
                                   DayOfWeek dayOfWeek,
                                   double secondsOfDay)

Initializes a new instance from a week number, a day of the week, and a number of seconds into the day.

Parameters:

week - The GPS reference week number. Must be counted from the initial GPS Epoch (Jan 6, 1980).

dayOfWeek - The day of the week.

secondsOfDay - The number of seconds into the day, counted from midnight.

Method Detail

getWeek

public final int getWeek()

Gets the week number, which is the number of weeks since January 6, 1980.

getWeekSinceRollover

public final int getWeekSinceRollover()

Gets the week number since the most recent GPS week rollover. In the GPS system, the week is represented as a 10 bit number so it can only be a value from 0 to 1023 before rolling over back to 0.

getRolloverCount

public final int getRolloverCount()

Gets the number of times that the GPS week counter has rolled over since GlobalPositioningSystemDate.JulianDateOfEpoch.

getDayOfWeek

@Nonnull
public final DayOfWeek getDayOfWeek()

Gets the day of the week.

getSecondsOfWeek

public final double getSecondsOfWeek()

Gets the elapsed whole and fractional seconds since the start of the week.

getSecondsOfDay

public final double getSecondsOfDay()

Gets the elapsed whole and fractional seconds since the start of the day.

getTotalDays

public final double getTotalDays()

Gets the total number of whole and fractional days that have elapsed since GlobalPositioningSystemDate.JulianDateOfEpoch.

getTotalDaysSinceRollover

public final double getTotalDaysSinceRollover()

Gets the total number of whole and fractional days that have elapsed since RolloverDate (get).

getKPoints

public final double getKPoints()

Gets the K-Points (15-minute segments) since the most recent GPS epoch.

getZCounts

public final long getZCounts()

Gets the Z-Counts (1.5 second segments) since the most recent GPS Epoch.

getRolloverDate

@Nonnull
public final JulianDate getRolloverDate()

Gets the most recent rollover of the GPS week counter. The week number returned by WeekSinceRollover (get) is relative to this date.

toJulianDate

@Nonnull
public final JulianDate toJulianDate()

Returns a JulianDate that is equivalent to this instance.

Returns:

The JulianDate that is equivalent to this date.

toDateTime

@Nonnull
public final ZonedDateTime toDateTime()

Converts this GPS Time to a ZonedDateTime with a default time standard of Global Positioning System Time.

Returns:

The ZonedDateTime.

toString

public String toString()

Returns the value of this GPS Time in RolloverCount (get):WeekSinceRollover (get):SecondsOfWeek (get), where RolloverCount (get) is the number of times that the GPS week counter has rolled over since GlobalPositioningSystemDate.JulianDateOfEpoch.

Overrides:

toString in class Object

Returns:

The string.

equalsType

public final boolean equalsType(@Nonnull
                                GlobalPositioningSystemDate other)

Indicates whether another instance of this type is exactly equal to this instance.

For two dates to be considered equal, the Week (get) and DayOfWeek (get) properties must be identical and the difference between the SecondsOfDay (get) properties must be less than 1.0e-10.

Specified by:

equalsType in interface IEquatable<GlobalPositioningSystemDate>

Parameters:

other - The instance to compare to this instance.

Returns:

true if other represents the same value as this instance; otherwise false.

equals

public boolean equals(Object obj)

Indicates whether another object is exactly equal to this instance.

For two dates to be considered equal, the Week (get) and DayOfWeek (get) properties must be identical and the difference between the SecondsOfDay (get) properties must be less than 1.0e-10.

Overrides:

equals in class Object

Parameters:

obj - The object to compare to this instance.

Returns:

true if obj is an instance of this type and represents the same value as this instance; otherwise false.

See Also:

Object.hashCode(), HashMap

equals

public static boolean equals(@Nonnull
                             GlobalPositioningSystemDate left,
                             @Nonnull
                             GlobalPositioningSystemDate right)

Returns true if the two instances are exactly equal.

For two dates to be considered equal, the Week (get) and DayOfWeek (get) properties must be identical and the difference between the SecondsOfDay (get) properties must be less than 1.0e-10.

Parameters:

left - The instance to compare to right.

right - The instance to compare to left.

Returns:

true if left represents the same value as right; otherwise false.

notEquals

public static boolean notEquals(@Nonnull
                                GlobalPositioningSystemDate left,
                                @Nonnull
                                GlobalPositioningSystemDate right)

Returns true if the two instances are not exactly equal.

For two dates to be considered equal, the Week (get) and DayOfWeek (get) properties must be identical and the difference between the SecondsOfDay (get) properties must be less than 1.0e-10.

Parameters:

left - The instance to compare to right.

right - The instance to compare to left.

Returns:

true if left does not represent the same value as right; otherwise false.

equalsEpsilon

public final boolean equalsEpsilon(@Nonnull
                                   GlobalPositioningSystemDate other,
                                   double epsilon)

Returns true if this date is within epsilon seconds of the specified date. That is, in order for the dates to be considered equal (and for this function to return true), the absolute value of the difference between them, in seconds, must be less than or equal to epsilon.

Specified by:

equalsEpsilon in interface IEquatableEpsilon<GlobalPositioningSystemDate>

Parameters:

other - The date to compare to this date.

epsilon - The largest difference between the dates, in seconds, such that they will be considered equal.

Returns:

true if the dates are equal as defined by the epsilon value.

hashCode

public int hashCode()

Returns a hash code for this instance, which is suitable for use in hashing algorithms and data structures like a hash table.

Overrides:

hashCode in class Object

Returns:

A hash code for the current object.

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

compareTo

public final int compareTo(@Nonnull
                           GlobalPositioningSystemDate other)

Compares this instance with another instance of the same type.

Specified by:

compareTo in interface Comparable<GlobalPositioningSystemDate>

Parameters:

other - An object to compare with this instance.

Returns:

A value indicating the relative order of the objects being compared. The return value has these meanings:

Value	Meaning
Less than zero	This instance is less than other.
Zero	This instance is equal to other.
Greater than zero	This instance is greater than other.

lessThan

public static boolean lessThan(@Nonnull
                               GlobalPositioningSystemDate left,
                               @Nonnull
                               GlobalPositioningSystemDate right)

Returns true if left occurs before right.

Parameters:

left - The date on the left side.

right - The date on the right side.

Returns:

true if the left is less than right; otherwise false.

greaterThan

public static boolean greaterThan(@Nonnull
                                  GlobalPositioningSystemDate left,
                                  @Nonnull
                                  GlobalPositioningSystemDate right)

Returns true if left occurs after right.

Parameters:

left - The date on the left side.

right - The date on the right side.

Returns:

true if the left is greater than right; otherwise false.

lessThanOrEqual

public static boolean lessThanOrEqual(@Nonnull
                                      GlobalPositioningSystemDate left,
                                      @Nonnull
                                      GlobalPositioningSystemDate right)

Returns true if left occurs before or at the same time as right.

Parameters:

left - The date on the left side.

right - The date on the right side.

Returns:

true if left occurs before or at the same time as right; otherwise false.

greaterThanOrEqual

public static boolean greaterThanOrEqual(@Nonnull
                                         GlobalPositioningSystemDate left,
                                         @Nonnull
                                         GlobalPositioningSystemDate right)

Returns true if left occurs after or at the same time as right.

Parameters:

left - The date on the left side.

right - The date on the right side.

Returns:

true if left occurs after or at the same time as right; otherwise false.

secondsDifference

public final double secondsDifference(@Nonnull
                                      GlobalPositioningSystemDate other)

Computes the number of seconds that have elapsed from this date to the other date.

This method subtracts the date on which it is called from the other date and returns the number of seconds between them.

Parameters:

other - The other date, which is the end of the interval.

Returns:

The number of seconds that have elapsed from this date to the other date.

minutesDifference

public final double minutesDifference(@Nonnull
                                      GlobalPositioningSystemDate other)

Computes the number of minutes that have elapsed from this date to the other date.

This method subtracts the date on which it is called from the other date and returns the number of minutes between them.

Parameters:

other - The other date, which is the end of the interval.

Returns:

The number of minutes that have elapsed from this date to the other date.

add

@Nonnull
public final GlobalPositioningSystemDate add(@Nonnull
                                                       Duration duration)

Adds a Duration to this date, producing a new date.

If the Standard (get) of duration is not GlobalPositioningSystemTime (get), the date will be converted to the duration's time standard before performing the addition. Then, the resulting date will be converted to GlobalPositioningSystemTime (get) before it is returned.

Parameters:

duration - The duration to add.

Returns:

A new Date that is the result of the addition.

subtract

@Nonnull
public final Duration subtract(@Nonnull
                                         GlobalPositioningSystemDate subtrahend)

Subtracts another date from this date.

This method subtracts the subtrahend date from this date and returns the Duration between them.

Parameters:

subtrahend - The date to subtract from this date.

Returns:

The Duration that is the result of the subtraction.

subtract

@Nonnull
public final GlobalPositioningSystemDate subtract(@Nonnull
                                                            Duration duration)

Subtracts a Duration from this date, producing a new date.

If the Standard (get) of duration is not GlobalPositioningSystemTime (get), the date will be converted to the duration's time standard before performing the subtraction. Then, the resulting date will be converted to GlobalPositioningSystemTime (get) before it is returned.

Parameters:

duration - The duration to subtract.

Returns:

A new date that is the result of the subtraction.

addSeconds

@Nonnull
public final GlobalPositioningSystemDate addSeconds(double seconds)

Adds the specified number of seconds to this date and returns the new date.

Parameters:

seconds - The number of seconds.

Returns:

The new date.

addDays

@Nonnull
public final GlobalPositioningSystemDate addDays(double days)

Adds the specified number of days to this date and returns the new date.

Parameters:

days - The number of days.

Returns:

The new date.

subtract

@Nonnull
public static Duration subtract(@Nonnull
                                          GlobalPositioningSystemDate left,
                                          @Nonnull
                                          GlobalPositioningSystemDate right)

Subtracts a date from another date, yielding a Duration.

This method subtracts the right date from the left date and returns the Duration between them.

Parameters:

left - The minuend.

right - The subtrahend.

Returns:

The Duration that is the result of the subtraction; that is, left minus right.

subtract

@Nonnull
public static GlobalPositioningSystemDate subtract(@Nonnull
                                                             GlobalPositioningSystemDate left,
                                                             @Nonnull
                                                             Duration right)

Subtracts a Duration from a date, yielding a new GlobalPositioningSystemDate.

If the Standard (get) of right is not GlobalPositioningSystemTime (get), the date will be converted to the duration's time standard before performing the subtraction. Then, the resulting date will be converted to GlobalPositioningSystemTime (get) before it is returned.

Parameters:

left - The minuend.

right - The subtrahend.

Returns:

The date that is the result of the subtraction; that is, left minus right. The time standard will be the same as the time standard of the subtrahend.

add

@Nonnull
public static GlobalPositioningSystemDate add(@Nonnull
                                                        GlobalPositioningSystemDate left,
                                                        @Nonnull
                                                        Duration right)

Adds a Duration to a GlobalPositioningSystemDate, producing a new date.

If the Standard (get) of right is not GlobalPositioningSystemTime (get), the date will be converted to the duration's time standard before performing the addition. Then, the resulting date will be to GlobalPositioningSystemTime (get) before it is returned.

Parameters:

left - The date.

right - The duration.

Returns:

A new date that is the result of the addition.