Package org.threeten.bp.chrono

Class MinguoChronology

  • All Implemented Interfaces:
    Serializable, Comparable<Chronology>
    public final class MinguoChronology
extends Chronology
implements Serializable
    The Minguo calendar system.

    This chronology defines the rules of the Minguo calendar system. This calendar system is primarily used in the Republic of China, often known as Taiwan. Dates are aligned such that 0001-01-01 (Minguo) is 1912-01-01 (ISO).

    The fields are defined as follows:

    • era - There are two eras, the current 'Republic' (ROC) and the previous era (BEFORE_ROC).
    • 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. The value for the current era is equal to the ISO proleptic-year minus 1911.
    • 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. The value is equal to the ISO proleptic-year minus 1911.
    • month-of-year - The Minguo month-of-year exactly matches ISO.
    • day-of-month - The Minguo day-of-month exactly matches ISO.
    • day-of-year - The Minguo day-of-year exactly matches ISO.
    • leap-year - The Minguo leap-year pattern exactly matches ISO, such that the two calendars are never out of step.

    Specification for implementors

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

    • Field Detail

      • INSTANCE

        public static final MinguoChronology INSTANCE
        Singleton instance for the Minguo chronology.

    • Method Detail

      • getCalendarType

        public String getCalendarType()
        Gets the calendar type of the underlying calendar system - 'roc'.

        The calendar type is an identifier defined by the Unicode Locale Data Markup Language (LDML) specification. It can be used to lookup the Chronology using Chronology.of(String). It can also be used as part of a locale, accessible via Locale#getUnicodeLocaleType(String) with the key 'ca'.

        Specified by:
        getCalendarType in class Chronology
        Returns:
        the calendar system type - 'roc'
        See Also:
        getId()

      • date

        public MinguoDate date​(Era era,
                       int yearOfEra,
                       int month,
                       int dayOfMonth)
        Description copied from class: Chronology
        Obtains a local date in this chronology from the era, year-of-era, month-of-year and day-of-month fields.
        Overrides:
        date in class Chronology
        Parameters:
        era - the era of the correct type for the chronology, not null
        yearOfEra - the chronology year-of-era
        month - the chronology month-of-year
        dayOfMonth - the chronology day-of-month
        Returns:
        the local date in this chronology, not null

      • date

        public MinguoDate date​(int prolepticYear,
                       int month,
                       int dayOfMonth)
        Description copied from class: Chronology
        Obtains a local date in this chronology from the proleptic-year, month-of-year and day-of-month fields.
        Specified by:
        date in class Chronology
        Parameters:
        prolepticYear - the chronology proleptic-year
        month - the chronology month-of-year
        dayOfMonth - the chronology day-of-month
        Returns:
        the local date in this chronology, not null

      • dateYearDay

        public MinguoDate dateYearDay​(Era era,
                              int yearOfEra,
                              int dayOfYear)
        Description copied from class: Chronology
        Obtains a local date in this chronology from the era, year-of-era and day-of-year fields.
        Overrides:
        dateYearDay in class Chronology
        Parameters:
        era - the era of the correct type for the chronology, not null
        yearOfEra - the chronology year-of-era
        dayOfYear - the chronology day-of-year
        Returns:
        the local date in this chronology, not null

      • dateYearDay

        public MinguoDate dateYearDay​(int prolepticYear,
                              int dayOfYear)
        Description copied from class: Chronology
        Obtains a local date in this chronology from the proleptic-year and day-of-year fields.
        Specified by:
        dateYearDay in class Chronology
        Parameters:
        prolepticYear - the chronology proleptic-year
        dayOfYear - the chronology day-of-year
        Returns:
        the local date in this chronology, not null

      • dateEpochDay

        public MinguoDate dateEpochDay​(long epochDay)
        Description copied from class: Chronology
        Obtains a local date in this chronology from the epoch-day.

        The definition of EPOCH_DAY is the same for all calendar systems, thus it can be used for conversion.

        Specified by:
        dateEpochDay in class Chronology
        Parameters:
        epochDay - the epoch day
        Returns:
        the local date in this chronology, not null

      • date

        public MinguoDate date​(TemporalAccessor temporal)
        Description copied from class: Chronology
        Obtains a local date in this chronology from another temporal object.

        This creates a date in this chronology based on the specified TemporalAccessor.

        The standard mechanism for conversion between date types is the local epoch-day field.

        Specified by:
        date in class Chronology
        Parameters:
        temporal - the temporal object to convert, not null
        Returns:
        the local date in this chronology, not null

      • localDateTime

        public ChronoLocalDateTime<MinguoDate> localDateTime​(TemporalAccessor temporal)
        Description copied from class: Chronology
        Obtains a local date-time in this chronology from another temporal object.

        This creates a date-time in this chronology based on the specified TemporalAccessor.

        The date of the date-time should be equivalent to that obtained by calling Chronology.date(TemporalAccessor). The standard mechanism for conversion between time types is the nano-of-day field.

        Overrides:
        localDateTime in class Chronology
        Parameters:
        temporal - the temporal object to convert, not null
        Returns:
        the local date-time in this chronology, not null

      • zonedDateTime

        public ChronoZonedDateTime<MinguoDate> zonedDateTime​(TemporalAccessor temporal)
        Description copied from class: Chronology
        Obtains a zoned date-time in this chronology from another temporal object.

        This creates a date-time in this chronology based on the specified TemporalAccessor.

        This should obtain a ZoneId using ZoneId.from(TemporalAccessor). The date-time should be obtained by obtaining an Instant. If that fails, the local date-time should be used.

        Overrides:
        zonedDateTime in class Chronology
        Parameters:
        temporal - the temporal object to convert, not null
        Returns:
        the zoned date-time in this chronology, not null

      • zonedDateTime

        public ChronoZonedDateTime<MinguoDate> zonedDateTime​(Instant instant,
                                                     ZoneId zone)
        Description copied from class: Chronology
        Obtains a zoned date-time in this chronology from an Instant.

        This creates a zoned date-time with the same instant as that specified.

        Overrides:
        zonedDateTime in class Chronology
        Parameters:
        instant - the instant to create the date-time from, not null
        zone - the time-zone, not null
        Returns:
        the zoned date-time, not null

      • dateNow

        public MinguoDate dateNow()
        Description copied from class: Chronology
        Obtains the current local date in this chronology 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.

        This implementation uses Chronology.dateNow(Clock).

        Overrides:
        dateNow in class Chronology
        Returns:
        the current local date using the system clock and default time-zone, not null

      • dateNow

        public MinguoDate dateNow​(ZoneId zone)
        Description copied from class: Chronology
        Obtains the current local date in this chronology 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.

        Overrides:
        dateNow in class Chronology
        Parameters:
        zone - the zone ID to use, not null
        Returns:
        the current local date using the system clock, not null

      • dateNow

        public MinguoDate dateNow​(Clock clock)
        Description copied from class: Chronology
        Obtains the current local date in this chronology 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.

        Overrides:
        dateNow in class Chronology
        Parameters:
        clock - the clock to use, not null
        Returns:
        the current local date, not null

      • isLeapYear

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

        Minguo leap years occur exactly in line with ISO leap years. This method does not validate the year passed in, and only has a well-defined result for years in the supported range.

        Specified by:
        isLeapYear in class 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)
        Description copied from class: Chronology
        Calculates the proleptic-year given the era and year-of-era.

        This combines the era and year-of-era into the single proleptic-year field.

        Specified by:
        prolepticYear in class Chronology
        Parameters:
        era - the era of the correct type for the chronology, not null
        yearOfEra - the chronology year-of-era
        Returns:
        the proleptic-year

      • eraOf

        public MinguoEra eraOf​(int eraValue)
        Description copied from class: Chronology
        Creates the chronology era object from the numeric value.

        The era is, conceptually, the largest division of the time-line. Most calendar systems have a single epoch dividing the time-line into two eras. However, some have multiple eras, such as one for the reign of each leader. The exact meaning is determined by the chronology according to the following constraints.

        The era in use at 1970-01-01 must have the value 1. Later eras must have sequentially higher values. Earlier eras must have sequentially lower values. Each chronology must refer to an enum or similar singleton to provide the era values.

        This method returns the singleton era of the correct type for the specified era value.

        Specified by:
        eraOf in class Chronology
        Parameters:
        eraValue - the era value
        Returns:
        the calendar system era, not null

      • eras

        public List<Era> eras()
        Description copied from class: Chronology
        Gets the list of eras for the chronology.

        Most calendar systems have an era, within which the year has meaning. If the calendar system does not support the concept of eras, an empty list must be returned.

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

      • range

        public ValueRange range​(ChronoField field)
        Description copied from class: Chronology
        Gets the range of valid values for the specified field.

        All fields can be expressed as a long integer. This method returns an object that describes the valid range for that value.

        Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.

        This method will return a result whether or not the chronology supports the field.

        Specified by:
        range in class Chronology
        Parameters:
        field - the field to get the range for, not null
        Returns:
        the range of valid values for the field, not null

      • resolveDate

        public MinguoDate resolveDate​(Map<TemporalField,​Long> fieldValues,
                              ResolverStyle resolverStyle)
        Description copied from class: Chronology
        Resolves parsed ChronoField values into a date during parsing.

        Most TemporalField implementations are resolved using the resolve method on the field. By contrast, the ChronoField class defines fields that only have meaning relative to the chronology. As such, ChronoField date fields are resolved here in the context of a specific chronology.

        The default implementation, which explains typical resolve behaviour, is provided in AbstractChronology.

        Specified by:
        resolveDate in class Chronology
        Parameters:
        fieldValues - the map of fields to values, which can be updated, not null
        resolverStyle - the requested type of resolve, not null
        Returns:
        the resolved date, null if insufficient information to create a date