Package net.time4j.calendar

Class ThaiSolarCalendar

java.lang.Object
net.time4j.engine.ChronoEntity<T>
net.time4j.engine.TimePoint<U,​D>
net.time4j.engine.Calendrical<CalendarUnit,​ThaiSolarCalendar>
net.time4j.calendar.ThaiSolarCalendar
All Implemented Interfaces:
Serializable, Comparable<ThaiSolarCalendar>, CalendarDate, ChronoDisplay, Temporal<CalendarDate>, LocalizedPatternSupport
@CalendarType("buddhist") public final class ThaiSolarCalendar extends Calendrical<CalendarUnit,​ThaiSolarCalendar> implements LocalizedPatternSupport

The Thai solar calendar calendar used in Thailand uses as only difference to western gregorian calendar a different year numbering with the Buddhist era mainly.

Following elements which are declared as constants are registered by this class

Furthermore, all elements defined in EpochDays and CommonElements are supported.

Anomaly in year 1940

Anomaly of 1940/41

This class supports the calendar reform of 1940/41 after that the begin of year moved from 1st of April to 1st of January. See also: Wikipedia.

The date arithmetic uses the ISO-compatible class CalendarUnit and always delegate to the ISO-equivalent PlainDate due to the fact that this calendar has always been a derivate of the western gregorian calendar (years are intended as approximate solar years). However, if applied on dates around the year 1940 where the begin of year was moved from 1st of April to 1st of January users might observe some changes of buddhist year numbering which appear strange on first glance. Example: ThaiSolarCalendar.ofBuddhist(2482, FEBRUARY, 1).plus(2, CalendarUnit.YEARS) results in ThaiSolarCalendar.ofBuddhist(2485, FEBRUARY, 1). The addition of two (solar) years corresponds to the addition of apparently three buddhist years in this edge case. If translated to its ISO-equivalent the reason is clear: [1940-02-01] + 2 years = [1942-02-01].

Support for unicode ca-extensions

      Locale locale = Locale.forLanguageTag("en-u-ca-buddhist");
      ChronoFormatter<CalendarDate> f = ChronoFormatter.ofGenericCalendarStyle(DisplayMode.FULL, locale);
      assertThat(
          f.format(PlainDate.of(2017, 10, 1)),
          is("Sunday, October 1, 2560 BE"));
Since:
3.19/4.15
Author:
Meno Hochschild
See Also:
Serialized Form

  • Field Details

  • Method Details

    • ofBuddhist

      public static ThaiSolarCalendar ofBuddhist​(int yearOfEra, Month month, int dayOfMonth)

      Creates a new instance of a Thai solar calendar date.

      Parameters:
      yearOfEra - buddhist year of era >= 1
      month - gregorian month
      dayOfMonth - day of month
      Returns:
      new instance of ThaiSolarCalendar
      Throws:
      IllegalArgumentException - in case of any inconsistencies
      Since:
      3.19/4.15

    • ofBuddhist

      public static ThaiSolarCalendar ofBuddhist​(int yearOfEra, int month, int dayOfMonth)

      Creates a new instance of a Thai solar calendar date.

      Parameters:
      yearOfEra - buddhist year of era >= 1
      month - gregorian month (1-12)
      dayOfMonth - day of month
      Returns:
      new instance of ThaiSolarCalendar
      Throws:
      IllegalArgumentException - in case of any inconsistencies
      Since:
      3.19/4.15

    • of

      public static ThaiSolarCalendar of​(ThaiSolarEra era, int yearOfEra, int month, int dayOfMonth)

      Creates a new instance of a Thai solar calendar date.

      Parameters:
      era - Thai era
      yearOfEra - Thai year of era >= 1
      month - gregorian month (1-12)
      dayOfMonth - day of month
      Returns:
      new instance of ThaiSolarCalendar
      Throws:
      IllegalArgumentException - in case of any inconsistencies
      Since:
      3.19/4.15

    • nowInSystemTime

      public static ThaiSolarCalendar nowInSystemTime()

      Obtains the current calendar date in system time.

      Convenient short-cut for: SystemClock.inLocalView().now(ThaiSolarCalendar.axis()).

      Returns:
      current calendar date in system time zone using the system clock
      Since:
      3.23/4.19
      See Also:
      SystemClock.inLocalView(), ZonalClock.now(net.time4j.engine.Chronology)

    • getEra

      public ThaiSolarEra getEra()

      Yields the buddhist era.

      Returns:
      ThaiSolarEra.BUDDHIST
      Since:
      3.19/4.15

    • getYear

      public int getYear()

      Yields the buddhist Thai year.

      Returns:
      int
      Since:
      3.19/4.15
      See Also:
      ThaiSolarEra.BUDDHIST

    • getMonth

      public Month getMonth()

      Yields the (gregorian) month.

      Returns:
      enum
      Since:
      3.19/4.15

    • getDayOfMonth

      public int getDayOfMonth()

      Yields the day of month.

      Returns:
      int
      Since:
      3.19/4.15

    • getDayOfWeek

      public Weekday getDayOfWeek()

      Determines the day of week.

      Returns:
      Weekday
      Since:
      3.19/4.15

    • getDayOfYear

      public int getDayOfYear()

      Yields the day of year.

      Returns:
      int
      Since:
      3.19/4.15

    • lengthOfMonth

      public int lengthOfMonth()

      Yields the length of current month in days.

      Returns:
      int
      Since:
      3.19/4.15

    • lengthOfYear

      public int lengthOfYear()

      Yields the length of current year in days.

      Returns:
      int
      Since:
      3.19/4.15

    • isLeapYear

      public boolean isLeapYear()

      Is the year of this date a leap year?

      Returns:
      boolean
      Since:
      3.19/4.15

    • isValid

      public static boolean isValid​(ThaiSolarEra era, int yearOfEra, int month, int dayOfMonth)

      Queries if given parameter values form a well defined calendar date.

      Parameters:
      era - the era to be checked
      yearOfEra - the year of era to be checked
      month - the month to be checked
      dayOfMonth - the day of month to be checked
      Returns:
      true if valid else false
      Since:
      3.34/4.29
      See Also:
      of(ThaiSolarEra, int, int, int)

    • at

      public GeneralTimestamp<ThaiSolarCalendar> at​(PlainTime time)

      Creates a new local timestamp with this date and given wall time.

      If the time T24:00 is used then the resulting timestamp will automatically be normalized such that the timestamp will contain the following day instead.

      Parameters:
      time - wall time
      Returns:
      general timestamp as composition of this date and given time
      Since:
      3.19/4.15

    • atTime

      public GeneralTimestamp<ThaiSolarCalendar> atTime​(int hour, int minute)

      Is equivalent to at(PlainTime.of(hour, minute)).

      Parameters:
      hour - hour of day in range (0-24)
      minute - minute of hour in range (0-59)
      Returns:
      general timestamp as composition of this date and given time
      Throws:
      IllegalArgumentException - if any argument is out of range
      Since:
      3.19/4.15

    • equals

      public boolean equals​(Object obj)
      Description copied from class: Calendrical

      Based on the epoch day number and the calendar system.

      In other words: Two date object are equal if they have the same temporal position on the local timeline and have the same calendrical type. Subclasses which define further state attributes must override this method.

      If an only temporal comparison is required then the method Calendrical.isSimultaneous(CalendarDate) is to be used.

      Overrides:
      equals in class Calendrical<CalendarUnit,​ThaiSolarCalendar>
      See Also:
      Chronology.getChronoType()

    • hashCode

      public int hashCode()
      Description copied from class: Calendrical

      Based on the epoch day number.

      Overrides:
      hashCode in class Calendrical<CalendarUnit,​ThaiSolarCalendar>

    • toString

      public String toString()
      Description copied from class: TimePoint

      Provides a complete textual representation of the state of this time point.

      The textual description often follows the conventions of ISO-8601. Usually the description starts with the chronological informations which are coarse-grained and ends with those ones which are fine-grained (for example the ISO-notation YYYY-MM-DD).

      Specified by:
      toString in class TimePoint<CalendarUnit,​ThaiSolarCalendar>

    • getDefaultWeekmodel

      public static Weekmodel getDefaultWeekmodel()

      Obtains the standard week model of this calendar.

      The thai calendar usually starts on Sunday.

      Returns:
      Weekmodel
      Since:
      3.24/4.20

    • axis

      public static TimeAxis<CalendarUnit,​ThaiSolarCalendar> axis()

      Returns the associated time axis.

      Returns:
      chronology
      Since:
      3.19/4.15