Package org.threeten.extra.chrono

Class InternationalFixedChronology

java.lang.Object
java.time.chrono.AbstractChronology
org.threeten.extra.chrono.InternationalFixedChronology
All Implemented Interfaces:
Serializable, Comparable<Chronology>, Chronology
public final class InternationalFixedChronology extends AbstractChronology implements Serializable
The International Fixed calendar system.

This chronology defines the rules of the International Fixed calendar system. It shares the leap year rule with the Gregorian calendar. Dates are aligned such that 0001-01-01 (International Fixed) is 0001-01-01 (ISO).

This class is proleptic. It implements only years greater or equal to 1.

This class implements a calendar where January 1st is the start of the year.

The fields are defined as follows:

  • era - There is only one era, the current 'Common Era' (CE).
  • year-of-era - The year-of-era for the current era increases uniformly from the epoch at year 1.
  • proleptic-year - The proleptic year is the same as the year-of-era for the current era.
  • month-of-year - There are 13 months in an International Fixed year, numbered from 1 to 13.
  • day-of-month - There are 28 days in a standard International Fixed month, numbered from 1 to 28, with day 29 used in months 6 and 12 (month 6 only has 29 days in a leap year).
  • day-of-year - There are 365 days in a standard International Fixed year and 366 days in a leap year. The days are numbered accordingly.
  • leap-year - Leap years occur every 4 years, but skips 3 out of four centuries, i.e. when the century is not divisible by 400. This is the same rule in use for the Gregorian calendar.
  • Week day - every month starts on a Sunday. Leap-day and year-day are neither part of a week, nor of any month.

Implementation Requirements

This class is immutable and thread-safe.
See Also:

  • Field Details

  • Constructor Details

    • InternationalFixedChronology

      @Deprecated public InternationalFixedChronology()
      Deprecated.
      Use the singleton INSTANCE instead.
      Private constructor, that is public to satisfy the ServiceLoader.

  • Method Details

    • getId

      public String getId()
      Gets the ID of the chronology - 'Ifc'.

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

      Specified by:
      getId in interface Chronology
      Returns:
      the chronology ID - 'Ifc'
      See Also:

    • getCalendarType

      public String getCalendarType()
      Gets the calendar type of the underlying calendar system, which returns null.

      The Unicode Locale Data Markup Language (LDML) specification does not define an identifier for this calendar system, thus null is returned.

      Specified by:
      getCalendarType in interface Chronology
      Returns:
      the calendar system type, null
      See Also:

    • date

      public InternationalFixedDate date(Era era, int yearOfEra, int month, int dayOfMonth)
      Obtains a local date in International Fixed 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 International Fixed era, not null
      yearOfEra - the year-of-era
      month - the month-of-year
      dayOfMonth - the day-of-month
      Returns:
      the International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date
      ClassCastException - if the era is not a InternationalFixedEra

    • date

      public InternationalFixedDate date(int prolepticYear, int month, int dayOfMonth)
      Obtains a local date in International Fixed 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 International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date

    • dateYearDay

      public InternationalFixedDate dateYearDay(Era era, int yearOfEra, int dayOfYear)
      Obtains a local date in International Fixed calendar system from the era, year-of-era and day-of-year fields.
      Specified by:
      dateYearDay in interface Chronology
      Parameters:
      era - the International Fixed era, not null
      yearOfEra - the year-of-era
      dayOfYear - the day-of-year
      Returns:
      the International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date
      ClassCastException - if the era is not a InternationalFixedEra

    • dateYearDay

      public InternationalFixedDate dateYearDay(int prolepticYear, int dayOfYear)
      Obtains a local date in International Fixed 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 International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date

    • dateEpochDay

      public InternationalFixedDate dateEpochDay(long epochDay)
      Obtains a local date in the International Fixed calendar system from the epoch-day.
      Specified by:
      dateEpochDay in interface Chronology
      Parameters:
      epochDay - the epoch day
      Returns:
      the International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date

    • dateNow

      public InternationalFixedDate dateNow()
      Obtains the current International Fixed 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 International Fixed local date using the system clock and default time-zone, not null
      Throws:
      DateTimeException - if unable to create the date

    • dateNow

      public InternationalFixedDate dateNow(ZoneId zone)
      Obtains the current International Fixed 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 zone ID to use, not null
      Returns:
      the current International Fixed local date using the system clock, not null
      Throws:
      DateTimeException - if unable to create the date

    • dateNow

      public InternationalFixedDate dateNow(Clock clock)
      Obtains the current International Fixed 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 International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date

    • date

      public InternationalFixedDate date(TemporalAccessor temporal)
      Obtains a International Fixed 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 International Fixed local date, not null
      Throws:
      DateTimeException - if unable to create the date

    • localDateTime

      public ChronoLocalDateTime<InternationalFixedDate> localDateTime(TemporalAccessor temporal)
      Obtains a International Fixed 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 International Fixed local date-time, not null
      Throws:
      DateTimeException - if unable to create the date-time

    • zonedDateTime

      public ChronoZonedDateTime<InternationalFixedDate> zonedDateTime(TemporalAccessor temporal)
      Obtains a International Fixed 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 International Fixed zoned date-time, not null
      Throws:
      DateTimeException - if unable to create the date-time

    • zonedDateTime

      public ChronoZonedDateTime<InternationalFixedDate> zonedDateTime(Instant instant, ZoneId zone)
      Obtains a International Fixed 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 International Fixed zoned date-time, not null
      Throws:
      DateTimeException - if the result exceeds the supported range

    • isLeapYear

      public boolean isLeapYear(long year)
      Checks if the specified year is a leap year.

      A leap-year is a year of a longer length than normal. Leap years in the calendar system match those of the ISO calendar system.

      Specified by:
      isLeapYear in interface Chronology
      Parameters:
      year - the proleptic-year to check, not validated for range
      Returns:
      true if the year is a leap year

    • eraOf

      public InternationalFixedEra eraOf(int eraValue)
      Creates the chronology era object from the numeric value.

      Only one era is supported, CE, with the value 1.

      Specified by:
      eraOf in interface Chronology
      Parameters:
      eraValue - the era value
      Returns:
      the calendar system era, not null
      Throws:
      DateTimeException - if unable to create the era

    • eras

      public List<Era> eras()
      Gets the list of eras for the chronology.

      Only one era is supported, CE, with the value 1.

      Specified by:
      eras in interface Chronology
      Returns:
      the list of eras for the chronology, may be immutable, not null

    • range

      public ValueRange range(ChronoField field)
      Specified by:
      range in interface Chronology

    • prolepticYear

      public int prolepticYear(Era era, int yearOfEra)
      Specified by:
      prolepticYear in interface Chronology