org.threeten.extra.chrono

Class PaxChronology

java.lang.Object

java.time.chrono.AbstractChronology

org.threeten.extra.chrono.PaxChronology

All Implemented Interfaces:

Serializable, Comparable<Chronology>, Chronology

public final class PaxChronology
extends AbstractChronology
implements Serializable

The Pax calendar system.

This chronology defines the rules of the proleptic Pax calendar system. This calendar system is a proposed reform calendar system, and is not in common use. The Pax differs from the Gregorian in terms of month count and length, and the leap year rule. Dates are aligned such that 0001-01-01 (Pax) is 0000-12-31 (ISO).

This class is proleptic. It implements Pax rules to the entire time-line.

The fields are defined as follows:

• era - There are two eras, the current 'Current Era' (CE) and the previous era 'Before Current Era' (BCE).
• year-of-era - The year-of-era for the current era increases uniformly from the epoch at year one. For the previous era the year increases from one as time goes backwards.
• proleptic-year - The proleptic year is the same as the year-of-era for the current era. For the previous era, years have zero, then negative values.
• month-of-year - There are 13 or 14 months in a Pax year, numbered from 1 to 13 (or 14).
• day-of-month - There are 28 days in each Pax month, numbered from 1 to 28. In a leap year a one-week month ('Pax') is inserted between months 12 and 13, shifting 13 to 14.
• day-of-year - There are 364 days in a standard Pax year and 371 in a leap year. The days are numbered from 1 to 364 or 1 to 371.
• leap-year - Leap years occur in every year whose last two digits are divisible by 6, are 99, or are 00 and the year is not divisible by 400.

For more information, please read the Pax Calendar Wikipedia article.

Implementation Requirements

This class is immutable and thread-safe.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static PaxChronology	INSTANCE Singleton instance for the Pax chronology.

Constructor Summary

Constructors

Constructor and Description
PaxChronology() Deprecated. Use the singleton INSTANCE instead.

Method Summary

Modifier and Type	Method and Description
PaxDate	date(Era era, int yearOfEra, int month, int dayOfMonth) Obtains a local date in Pax calendar system from the era, year-of-era, month-of-year and day-of-month fields.
PaxDate	date(int prolepticYear, int month, int dayOfMonth) Obtains a local date in Pax calendar system from the proleptic-year, month-of-year and day-of-month fields.
PaxDate	date(TemporalAccessor temporal) Obtains a Pax local date from another date-time object.
PaxDate	dateEpochDay(long epochDay) Obtains a local date in the Pax calendar system from the epoch-day.
PaxDate	dateNow() Obtains the current Pax local date from the system clock in the default time-zone.
PaxDate	dateNow(Clock clock) Obtains the current Pax local date from the specified clock.
PaxDate	dateNow(ZoneId zone) Obtains the current Pax local date from the system clock in the specified time-zone.
PaxDate	dateYearDay(Era era, int yearOfEra, int dayOfYear) Obtains a local date in Pax calendar system from the era, year-of-era and day-of-year fields.
PaxDate	dateYearDay(int prolepticYear, int dayOfYear) Obtains a local date in Pax calendar system from the proleptic-year and day-of-year fields.
PaxEra	eraOf(int eraValue)
List<Era>	eras()
String	getCalendarType() Gets the calendar type of the underlying calendar system - 'pax'.
String	getId() Gets the ID of the chronology - 'Pax'.
boolean	isLeapYear(long prolepticYear) Checks if the specified year is a leap year.
ChronoLocalDateTime<PaxDate>	localDateTime(TemporalAccessor temporal) Obtains a Pax local date-time from another date-time object.
int	prolepticYear(Era era, int yearOfEra)
ValueRange	range(ChronoField field)
PaxDate	resolveDate(Map<TemporalField,Long> fieldValues, ResolverStyle resolverStyle)
ChronoZonedDateTime<PaxDate>	zonedDateTime(Instant instant, ZoneId zone) Obtains a Pax zoned date-time in this chronology from an Instant.
ChronoZonedDateTime<PaxDate>	zonedDateTime(TemporalAccessor temporal) Obtains a Pax zoned date-time from another date-time object.

Methods inherited from class java.time.chrono.AbstractChronology

compareTo, equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.time.chrono.Chronology

from, getDisplayName, period

Field Detail

INSTANCE

public static final PaxChronology INSTANCE

Singleton instance for the Pax chronology.

Constructor Detail

PaxChronology

@Deprecated
public PaxChronology()

Deprecated. Use the singleton INSTANCE instead.

Private constructor, that is public to satisfy the ServiceLoader.

Method Detail

getId

public String getId()

Gets the ID of the chronology - 'Pax'.

The ID uniquely identifies the Chronology. It can be used to lookup the Chronology using AbstractChronology.of(String).

Specified by:

getId in interface Chronology

Returns:

the chronology ID - 'Pax'

See Also:

getCalendarType()

getCalendarType

public String getCalendarType()

Gets the calendar type of the underlying calendar system - 'pax'.

The Unicode Locale Data Markup Language (LDML) specification does not define an identifier for the Pax calendar, but were it to do so, 'pax' is highly likely to be chosen.

Specified by:

getCalendarType in interface Chronology

Returns:

the calendar system type - 'pax'

See Also:

getId()

date

public PaxDate date(Era era,
                    int yearOfEra,
                    int month,
                    int dayOfMonth)

Obtains a local date in Pax calendar system from the era, year-of-era, month-of-year and day-of-month fields.

Specified by:

date in interface Chronology

Parameters:

era - the Pax era, not null

yearOfEra - the year-of-era

month - the month-of-year

dayOfMonth - the day-of-month

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

ClassCastException - if the era is not a PaxEra

date

public PaxDate date(int prolepticYear,
                    int month,
                    int dayOfMonth)

Obtains a local date in Pax calendar system from the proleptic-year, month-of-year and day-of-month fields.

Specified by:

date in interface Chronology

Parameters:

prolepticYear - the proleptic-year

month - the month-of-year

dayOfMonth - the day-of-month

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

dateYearDay

public PaxDate dateYearDay(Era era,
                           int yearOfEra,
                           int dayOfYear)

Obtains a local date in Pax calendar system from the era, year-of-era and day-of-year fields.

Specified by:

dateYearDay in interface Chronology

Parameters:

era - the Pax era, not null

yearOfEra - the year-of-era

dayOfYear - the day-of-year

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

ClassCastException - if the era is not a PaxEra

dateYearDay

public PaxDate dateYearDay(int prolepticYear,
                           int dayOfYear)

Obtains a local date in Pax calendar system from the proleptic-year and day-of-year fields.

Specified by:

dateYearDay in interface Chronology

Parameters:

prolepticYear - the proleptic-year

dayOfYear - the day-of-year

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

dateEpochDay

public PaxDate dateEpochDay(long epochDay)

Obtains a local date in the Pax calendar system from the epoch-day.

Specified by:

dateEpochDay in interface Chronology

Parameters:

epochDay - the epoch day

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

dateNow

public PaxDate dateNow()

Obtains the current Pax local date from the system clock in the default time-zone.

This will query the system clock in the default time-zone to obtain the current date.

Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

Specified by:

dateNow in interface Chronology

Returns:

the current Pax local date using the system clock and default time-zone, not null

Throws:

DateTimeException - if unable to create the date

dateNow

public PaxDate dateNow(ZoneId zone)

Obtains the current Pax local date from the system clock in the specified time-zone.

This will query the system clock to obtain the current date. Specifying the time-zone avoids dependence on the default time-zone.

Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

Specified by:

dateNow in interface Chronology

Parameters:

zone - the ZoneId to use, not null

Returns:

the current Pax local date using the system clock, not null

Throws:

DateTimeException - if unable to create the date

dateNow

public PaxDate dateNow(Clock clock)

Obtains the current Pax local date from the specified clock.

This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using dependency injection.

Specified by:

dateNow in interface Chronology

Parameters:

clock - the clock to use, not null

Returns:

the current Pax local date, not null

Throws:

DateTimeException - if unable to create the date

date

public PaxDate date(TemporalAccessor temporal)

Obtains a Pax local date from another date-time object.

Specified by:

date in interface Chronology

Parameters:

temporal - the date-time object to convert, not null

Returns:

the Pax local date, not null

Throws:

DateTimeException - if unable to create the date

localDateTime

public ChronoLocalDateTime<PaxDate> localDateTime(TemporalAccessor temporal)

Obtains a Pax local date-time from another date-time object.

Specified by:

localDateTime in interface Chronology

Parameters:

temporal - the date-time object to convert, not null

Returns:

the Pax local date-time, not null

Throws:

DateTimeException - if unable to create the date-time

zonedDateTime

public ChronoZonedDateTime<PaxDate> zonedDateTime(TemporalAccessor temporal)

Obtains a Pax zoned date-time from another date-time object.

Specified by:

zonedDateTime in interface Chronology

Parameters:

temporal - the date-time object to convert, not null

Returns:

the Pax zoned date-time, not null

Throws:

DateTimeException - if unable to create the date-time

zonedDateTime

public ChronoZonedDateTime<PaxDate> zonedDateTime(Instant instant,
                                                  ZoneId zone)

Obtains a Pax zoned date-time in this chronology from an Instant.

Specified by:

zonedDateTime in interface Chronology

Parameters:

instant - the instant to create the date-time from, not null

zone - the time-zone, not null

Returns:

the Pax zoned date-time, not null

Throws:

DateTimeException - if the result exceeds the supported range

isLeapYear

public boolean isLeapYear(long prolepticYear)

Checks if the specified year is a leap year.

In general, a year is a leap year if the last two digits are divisible by 6 without remainder, or are 99. Years with the last two digits of 00 are also leap years, with the exception of years divisible by 400, which are not.

For example, 2012 is a leap year because the last two digits (12) are divisible by 6. 1999 is a leap year as the last two digits are both 9's (99). 1900 is a leap year as the last two digits are both 0's (00), however 2000 was not a leap year as it is divisible by 400. The year 0 is not a leap year.

Specified by:

isLeapYear in interface Chronology

Parameters:

prolepticYear - the proleptic-year to check, not validated for range

Returns:

true if the year is a leap year

prolepticYear

public int prolepticYear(Era era,
                         int yearOfEra)

Specified by:

prolepticYear in interface Chronology

eraOf

public PaxEra eraOf(int eraValue)

Specified by:

eraOf in interface Chronology

eras

public List<Era> eras()

Specified by:

eras in interface Chronology

range

public ValueRange range(ChronoField field)

Specified by:

range in interface Chronology

resolveDate

public PaxDate resolveDate(Map<TemporalField,Long> fieldValues,
                           ResolverStyle resolverStyle)

Specified by:

resolveDate in interface Chronology

Overrides:

resolveDate in class AbstractChronology