org.threeten.bp.LocalDate#isAfter

Source File: JapaneseDate.java From threetenbp with BSD 3-Clause "New" or "Revised" License

6 votes

/**
 * Obtains a {@code JapaneseDate} representing a date in the Japanese calendar
 * system from the era, year-of-era and day-of-year fields.
 * <p>
 * This returns a {@code JapaneseDate} with the specified fields.
 * The day must be valid for the year, otherwise an exception will be thrown.
 * The Japanese day-of-year is reset when the era changes.
 *
 * @param era  the Japanese era, not null
 * @param yearOfEra  the Japanese year-of-era
 * @param dayOfYear  the Japanese day-of-year, from 1 to 31
 * @return the date in Japanese calendar system, not null
 * @throws DateTimeException if the value of any field is out of range,
 *  or if the day-of-year is invalid for the year
 */
static JapaneseDate ofYearDay(JapaneseEra era, int yearOfEra, int dayOfYear) {
    Jdk8Methods.requireNonNull(era, "era");
    if (yearOfEra < 1) {
        throw new DateTimeException("Invalid YearOfEra: " + yearOfEra);
    }
    LocalDate eraStartDate = era.startDate();
    LocalDate eraEndDate = era.endDate();
    if (yearOfEra == 1) {
        dayOfYear += eraStartDate.getDayOfYear() - 1;
        if (dayOfYear > eraStartDate.lengthOfYear()) {
            throw new DateTimeException("DayOfYear exceeds maximum allowed in the first year of era " + era);
        }
    }
    int yearOffset = eraStartDate.getYear() - 1;
    LocalDate isoDate = LocalDate.ofYearDay(yearOfEra + yearOffset, dayOfYear);
    if (isoDate.isBefore(eraStartDate) || isoDate.isAfter(eraEndDate)) {
        throw new DateTimeException("Requested date is outside bounds of era " + era);
    }
    return new JapaneseDate(era, yearOfEra, isoDate);
}

Source File: JapaneseEra.java From threetenbp with BSD 3-Clause "New" or "Revised" License

6 votes

/**
 * Registers an additional instance of {@code JapaneseEra}.
 * <p>
 * A new Japanese era can begin at any time.
 * This method allows one new era to be registered without the need for a new library version.
 * If needed, callers should assign the result to a static variable accessible
 * across the application. This must be done once, in early startup code.
 * <p>
 * NOTE: This method does not exist in Java SE 8.
 *
 * @param since  the date representing the first date of the era, validated not null
 * @param name  the name
 * @return the {@code JapaneseEra} singleton, not null
 * @throws DateTimeException if an additional era has already been registered
 */
public static JapaneseEra registerEra(LocalDate since, String name) {
    JapaneseEra[] known = KNOWN_ERAS.get();
    if (known.length > 5) {
        throw new DateTimeException("Only one additional Japanese era can be added");
    }
    Jdk8Methods.requireNonNull(since, "since");
    Jdk8Methods.requireNonNull(name, "name");
    if (!since.isAfter(REIWA.since)) {
        throw new DateTimeException("Invalid since date for additional Japanese era, must be after Reiwa");
    }
    JapaneseEra era = new JapaneseEra(ADDITIONAL_VALUE, since, name);
    JapaneseEra[] newArray = Arrays.copyOf(known, 6);
    newArray[5] = era;
    if (!KNOWN_ERAS.compareAndSet(known, newArray)) {
        throw new DateTimeException("Only one additional Japanese era can be added");
    }
    return era;
}