();
/**
* Fallback language for the era names.
*/
private static final String FALLBACK_LANGUAGE = "en";
/**
* Language that has the era names.
*/
private static final String TARGET_LANGUAGE = "ja";
/**
* Name data.
*/
// TODO: replace all the hard-coded Maps with locale resources
static {
ERA_NARROW_NAMES.put(FALLBACK_LANGUAGE, new String[]{"Unknown", "K", "M", "T", "S", "H"});
ERA_NARROW_NAMES.put(TARGET_LANGUAGE, new String[]{"Unknown", "K", "M", "T", "S", "H"});
ERA_SHORT_NAMES.put(FALLBACK_LANGUAGE, new String[]{"Unknown", "K", "M", "T", "S", "H"});
ERA_SHORT_NAMES.put(TARGET_LANGUAGE, new String[]{"Unknown", "\u6176", "\u660e", "\u5927", "\u662d", "\u5e73"});
ERA_FULL_NAMES.put(FALLBACK_LANGUAGE, new String[]{"Unknown", "Keio", "Meiji", "Taisho", "Showa", "Heisei"});
ERA_FULL_NAMES.put(TARGET_LANGUAGE,
new String[]{"Unknown", "\u6176\u5fdc", "\u660e\u6cbb", "\u5927\u6b63", "\u662d\u548c", "\u5e73\u6210"});
}
//-----------------------------------------------------------------------
/**
* Restricted constructor.
*/
private JapaneseChronology() {
}
/**
* Resolve singleton.
*
* @return the singleton instance, not null
*/
private Object readResolve() {
return INSTANCE;
}
//-----------------------------------------------------------------------
/**
* Gets the ID of the chronology - 'Japanese'.
*
* The ID uniquely identifies the {@code Chronology}.
* It can be used to lookup the {@code Chronology} using {@link #of(String)}.
*
* @return the chronology ID - 'Japanese'
* @see #getCalendarType()
*/
@Override
public String getId() {
return "Japanese";
}
/**
* Gets the calendar type of the underlying calendar system - 'japanese'.
*
* The calendar type is an identifier defined by the
* Unicode Locale Data Markup Language (LDML) specification.
* It can be used to lookup the {@code Chronology} using {@link #of(String)}.
* It can also be used as part of a locale, accessible via
* {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'.
*
* @return the calendar system type - 'japanese'
* @see #getId()
*/
@Override
public String getCalendarType() {
return "japanese";
}
//-----------------------------------------------------------------------
@Override // override with covariant return type
public JapaneseDate date(Era era, int yearOfEra, int month, int dayOfMonth) {
if (era instanceof JapaneseEra == false) {
throw new ClassCastException("Era must be JapaneseEra");
}
return JapaneseDate.of((JapaneseEra) era, yearOfEra, month, dayOfMonth);
}
@Override // override with covariant return type
public JapaneseDate date(int prolepticYear, int month, int dayOfMonth) {
return new JapaneseDate(LocalDate.of(prolepticYear, month, dayOfMonth));
}
/**
* Obtains a local date in Japanese calendar system from the
* era, year-of-era and day-of-year fields.
*
* The day-of-year in this factory is expressed relative to the start of the year-of-era.
* This definition changes the normal meaning of day-of-year only in those years
* where the year-of-era is reset to one due to a change in the era.
* For example:
*
* 6th Jan Showa 64 = day-of-year 6
* 7th Jan Showa 64 = day-of-year 7
* 8th Jan Heisei 1 = day-of-year 1
* 9th Jan Heisei 1 = day-of-year 2
*
*
* @param era the Japanese era, not null
* @param yearOfEra the year-of-era
* @param dayOfYear the day-of-year
* @return the Japanese local date, not null
* @throws DateTimeException if unable to create the date
* @throws ClassCastException if the {@code era} is not a {@code JapaneseEra}
*/
@Override
public JapaneseDate dateYearDay(Era era, int yearOfEra, int dayOfYear) {
if (era instanceof JapaneseEra == false) {
throw new ClassCastException("Era must be JapaneseEra");
}
return JapaneseDate.ofYearDay((JapaneseEra) era, yearOfEra, dayOfYear);
}
/**
* Obtains a local date in Japanese calendar system from the
* proleptic-year and day-of-year fields.
*
* The day-of-year in this factory is expressed relative to the start of the proleptic year.
* The Japanese proleptic year and day-of-year are the same as those in the ISO calendar system.
* They are not reset when the era changes.
*
* @param prolepticYear the proleptic-year
* @param dayOfYear the day-of-year
* @return the Japanese local date, not null
* @throws DateTimeException if unable to create the date
*/
@Override
public JapaneseDate dateYearDay(int prolepticYear, int dayOfYear) {
LocalDate date = LocalDate.ofYearDay(prolepticYear, dayOfYear);
return date(prolepticYear, date.getMonthValue(), date.getDayOfMonth());
}
@Override
public JapaneseDate dateEpochDay(long epochDay) {
return new JapaneseDate(LocalDate.ofEpochDay(epochDay));
}
//-----------------------------------------------------------------------
@Override // override with covariant return type
public JapaneseDate date(TemporalAccessor temporal) {
if (temporal instanceof JapaneseDate) {
return (JapaneseDate) temporal;
}
return new JapaneseDate(LocalDate.from(temporal));
}
@SuppressWarnings("unchecked")
@Override // override with covariant return type
public ChronoLocalDateTime localDateTime(TemporalAccessor temporal) {
return (ChronoLocalDateTime) super.localDateTime(temporal);
}
@SuppressWarnings("unchecked")
@Override // override with covariant return type
public ChronoZonedDateTime zonedDateTime(TemporalAccessor temporal) {
return (ChronoZonedDateTime) super.zonedDateTime(temporal);
}
@SuppressWarnings("unchecked")
@Override // override with covariant return type
public ChronoZonedDateTime zonedDateTime(Instant instant, ZoneId zone) {
return (ChronoZonedDateTime) super.zonedDateTime(instant, zone);
}
//-----------------------------------------------------------------------
@Override // override with covariant return type
public JapaneseDate dateNow() {
return (JapaneseDate) super.dateNow();
}
@Override // override with covariant return type
public JapaneseDate dateNow(ZoneId zone) {
return (JapaneseDate) super.dateNow(zone);
}
@Override // override with covariant return type
public JapaneseDate dateNow(Clock clock) {
Jdk8Methods.requireNonNull(clock, "clock");
return (JapaneseDate) super.dateNow(clock);
}
//-----------------------------------------------------------------------
/**
* Checks if the specified year is a leap year.
*
* Japanese calendar 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.
*
* @param prolepticYear the proleptic-year to check, not validated for range
* @return true if the year is a leap year
*/
@Override
public boolean isLeapYear(long prolepticYear) {
return IsoChronology.INSTANCE.isLeapYear(prolepticYear);
}
@Override
public int prolepticYear(Era era, int yearOfEra) {
if (era instanceof JapaneseEra == false) {
throw new ClassCastException("Era must be JapaneseEra");
}
JapaneseEra jera = (JapaneseEra) era;
int isoYear = jera.startDate().getYear() + yearOfEra - 1;
ValueRange range = ValueRange.of(1, jera.endDate().getYear() - jera.startDate().getYear() + 1);
range.checkValidValue(yearOfEra, YEAR_OF_ERA);
return isoYear;
}
/**
* Returns the calendar system era object from the given numeric value.
*
* See the description of each Era for the numeric values of:
* {@link JapaneseEra#HEISEI}, {@link JapaneseEra#SHOWA},{@link JapaneseEra#TAISHO},
* {@link JapaneseEra#MEIJI}), only Meiji and later eras are supported.
*
* @param eraValue the era value
* @return the Japanese {@code Era} for the given numeric era value
* @throws DateTimeException if {@code eraValue} is invalid
*/
@Override
public JapaneseEra eraOf(int eraValue) {
return JapaneseEra.of(eraValue);
}
@Override
public List eras() {
return Arrays.asList(JapaneseEra.values());
}
//-----------------------------------------------------------------------
@Override
public ValueRange range(ChronoField field) {
switch (field) {
case DAY_OF_MONTH:
case DAY_OF_WEEK:
case MICRO_OF_DAY:
case MICRO_OF_SECOND:
case HOUR_OF_DAY:
case HOUR_OF_AMPM:
case MINUTE_OF_DAY:
case MINUTE_OF_HOUR:
case SECOND_OF_DAY:
case SECOND_OF_MINUTE:
case MILLI_OF_DAY:
case MILLI_OF_SECOND:
case NANO_OF_DAY:
case NANO_OF_SECOND:
case CLOCK_HOUR_OF_DAY:
case CLOCK_HOUR_OF_AMPM:
case EPOCH_DAY:
case PROLEPTIC_MONTH:
return field.range();
}
Calendar jcal = Calendar.getInstance(LOCALE);
switch (field) {
case ERA: {
JapaneseEra[] eras = JapaneseEra.values();
return ValueRange.of(eras[0].getValue(), eras[eras.length - 1].getValue());
}
case YEAR: {
JapaneseEra[] eras = JapaneseEra.values();
return ValueRange.of(JapaneseDate.MIN_DATE.getYear(), eras[eras.length - 1].endDate().getYear());
}
case YEAR_OF_ERA: {
JapaneseEra[] eras = JapaneseEra.values();
int maxIso = eras[eras.length - 1].endDate().getYear();
int maxJapanese = maxIso - eras[eras.length - 1].startDate().getYear() + 1;
int min = Integer.MAX_VALUE;
for (int i = 0; i < eras.length; i++) {
min = Math.min(min, eras[i].endDate().getYear() - eras[i].startDate().getYear() + 1);
}
return ValueRange.of(1, 6, min, maxJapanese);
}
case MONTH_OF_YEAR:
return ValueRange.of(jcal.getMinimum(Calendar.MONTH) + 1, jcal.getGreatestMinimum(Calendar.MONTH) + 1,
jcal.getLeastMaximum(Calendar.MONTH) + 1, jcal.getMaximum(Calendar.MONTH) + 1);
case DAY_OF_YEAR: {
JapaneseEra[] eras = JapaneseEra.values();
int min = 366;
for (int i = 0; i < eras.length; i++) {
min = Math.min(min, eras[i].startDate().lengthOfYear() - eras[i].startDate().getDayOfYear() + 1);
}
return ValueRange.of(1, min, 366);
}
default:
// TODO: review the remaining fields
throw new UnsupportedOperationException("Unimplementable field: " + field);
}
}
@Override
public JapaneseDate resolveDate(Map fieldValues, ResolverStyle resolverStyle) {
if (fieldValues.containsKey(EPOCH_DAY)) {
return dateEpochDay(fieldValues.remove(EPOCH_DAY));
}
// normalize fields
Long prolepticMonth = fieldValues.remove(PROLEPTIC_MONTH);
if (prolepticMonth != null) {
if (resolverStyle != ResolverStyle.LENIENT) {
PROLEPTIC_MONTH.checkValidValue(prolepticMonth);
}
updateResolveMap(fieldValues, MONTH_OF_YEAR, Jdk8Methods.floorMod(prolepticMonth, 12) + 1);
updateResolveMap(fieldValues, YEAR, Jdk8Methods.floorDiv(prolepticMonth, 12));
}
// eras
Long eraLong = fieldValues.get(ERA);
JapaneseEra era = null;
if (eraLong != null) {
era = eraOf(range(ERA).checkValidIntValue(eraLong, ERA));
}
Long yoeLong = fieldValues.get(YEAR_OF_ERA);
if (yoeLong != null) {
int yoe= range(YEAR_OF_ERA).checkValidIntValue(yoeLong, YEAR_OF_ERA);
if (era == null && resolverStyle != ResolverStyle.STRICT && fieldValues.containsKey(YEAR) == false) {
List eras = eras();
era = (JapaneseEra) eras.get(eras.size() - 1);
}
// can only resolve to dates, not to proleptic-year
if (era != null && fieldValues.containsKey(MONTH_OF_YEAR) && fieldValues.containsKey(DAY_OF_MONTH)) {
fieldValues.remove(ERA);
fieldValues.remove(YEAR_OF_ERA);
return resolveEYMD(fieldValues, resolverStyle, era, yoe);
}
if (era != null && fieldValues.containsKey(DAY_OF_YEAR)) {
fieldValues.remove(ERA);
fieldValues.remove(YEAR_OF_ERA);
return resolveEYD(fieldValues, resolverStyle, era, yoe);
}
}
// build date
if (fieldValues.containsKey(YEAR)) {
if (fieldValues.containsKey(MONTH_OF_YEAR)) {
if (fieldValues.containsKey(DAY_OF_MONTH)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long months = Jdk8Methods.safeSubtract(fieldValues.remove(MONTH_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_MONTH), 1);
return date(y, 1, 1).plusMonths(months).plusDays(days);
} else {
int moy = range(MONTH_OF_YEAR).checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR), MONTH_OF_YEAR);
int dom = range(DAY_OF_MONTH).checkValidIntValue(fieldValues.remove(DAY_OF_MONTH), DAY_OF_MONTH);
if (resolverStyle == ResolverStyle.SMART && dom > 28) {
dom = Math.min(dom, date(y, moy, 1).lengthOfMonth());
}
return date(y, moy, dom);
}
}
if (fieldValues.containsKey(ALIGNED_WEEK_OF_MONTH)) {
if (fieldValues.containsKey(ALIGNED_DAY_OF_WEEK_IN_MONTH)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long months = Jdk8Methods.safeSubtract(fieldValues.remove(MONTH_OF_YEAR), 1);
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_MONTH), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_MONTH), 1);
return date(y, 1, 1).plus(months, MONTHS).plus(weeks, WEEKS).plus(days, DAYS);
}
int moy = MONTH_OF_YEAR.checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR));
int aw = ALIGNED_WEEK_OF_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_MONTH));
int ad = ALIGNED_DAY_OF_WEEK_IN_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_MONTH));
JapaneseDate date = date(y, moy, 1).plus((aw - 1) * 7 + (ad - 1), DAYS);
if (resolverStyle == ResolverStyle.STRICT && date.get(MONTH_OF_YEAR) != moy) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
if (fieldValues.containsKey(DAY_OF_WEEK)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long months = Jdk8Methods.safeSubtract(fieldValues.remove(MONTH_OF_YEAR), 1);
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_MONTH), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_WEEK), 1);
return date(y, 1, 1).plus(months, MONTHS).plus(weeks, WEEKS).plus(days, DAYS);
}
int moy = MONTH_OF_YEAR.checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR));
int aw = ALIGNED_WEEK_OF_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_MONTH));
int dow = DAY_OF_WEEK.checkValidIntValue(fieldValues.remove(DAY_OF_WEEK));
JapaneseDate date = date(y, moy, 1).plus(aw - 1, WEEKS).with(nextOrSame(DayOfWeek.of(dow)));
if (resolverStyle == ResolverStyle.STRICT && date.get(MONTH_OF_YEAR) != moy) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
}
}
if (fieldValues.containsKey(DAY_OF_YEAR)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_YEAR), 1);
return dateYearDay(y, 1).plusDays(days);
}
int doy = DAY_OF_YEAR.checkValidIntValue(fieldValues.remove(DAY_OF_YEAR));
return dateYearDay(y, doy);
}
if (fieldValues.containsKey(ALIGNED_WEEK_OF_YEAR)) {
if (fieldValues.containsKey(ALIGNED_DAY_OF_WEEK_IN_YEAR)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_YEAR), 1);
return date(y, 1, 1).plus(weeks, WEEKS).plus(days, DAYS);
}
int aw = ALIGNED_WEEK_OF_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_YEAR));
int ad = ALIGNED_DAY_OF_WEEK_IN_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_YEAR));
JapaneseDate date = date(y, 1, 1).plusDays((aw - 1) * 7 + (ad - 1));
if (resolverStyle == ResolverStyle.STRICT && date.get(YEAR) != y) {
throw new DateTimeException("Strict mode rejected date parsed to a different year");
}
return date;
}
if (fieldValues.containsKey(DAY_OF_WEEK)) {
int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_WEEK), 1);
return date(y, 1, 1).plus(weeks, WEEKS).plus(days, DAYS);
}
int aw = ALIGNED_WEEK_OF_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_YEAR));
int dow = DAY_OF_WEEK.checkValidIntValue(fieldValues.remove(DAY_OF_WEEK));
JapaneseDate date = date(y, 1, 1).plus(aw - 1, WEEKS).with(nextOrSame(DayOfWeek.of(dow)));
if (resolverStyle == ResolverStyle.STRICT && date.get(YEAR) != y) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
}
}
return null;
}
private JapaneseDate resolveEYMD(Map fieldValues, ResolverStyle resolverStyle, JapaneseEra era, int yoe) {
if (resolverStyle == ResolverStyle.LENIENT) {
int y = era.startDate().getYear() + yoe - 1;
long months = Jdk8Methods.safeSubtract(fieldValues.remove(MONTH_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_MONTH), 1);
return date(y, 1, 1).plus(months, MONTHS).plus(days, DAYS);
}
int moy = range(MONTH_OF_YEAR).checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR), MONTH_OF_YEAR);
int dom = range(DAY_OF_MONTH).checkValidIntValue(fieldValues.remove(DAY_OF_MONTH), DAY_OF_MONTH);
if (resolverStyle == ResolverStyle.SMART) { // previous valid
if (yoe < 1) {
throw new DateTimeException("Invalid YearOfEra: " + yoe);
}
int y = era.startDate().getYear() + yoe - 1;
if (dom > 28) {
dom = Math.min(dom, date(y, moy, 1).lengthOfMonth());
}
JapaneseDate jd = date(y, moy, dom);
if (jd.getEra() != era) {
// ensure within calendar year of change
if (Math.abs(jd.getEra().getValue() - era.getValue()) > 1) {
throw new DateTimeException("Invalid Era/YearOfEra: " + era + " " + yoe);
}
if (jd.get(YEAR_OF_ERA) != 1 && yoe != 1) {
throw new DateTimeException("Invalid Era/YearOfEra: " + era + " " + yoe);
}
}
return jd;
}
return date(era, yoe, moy, dom);
}
private JapaneseDate resolveEYD(Map fieldValues, ResolverStyle resolverStyle, JapaneseEra era, int yoe) {
if (resolverStyle == ResolverStyle.LENIENT) {
int y = era.startDate().getYear() + yoe - 1;
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_YEAR), 1);
return dateYearDay(y, 1).plus(days, DAYS);
}
int doy = range(DAY_OF_YEAR).checkValidIntValue(fieldValues.remove(DAY_OF_YEAR), DAY_OF_YEAR);
return dateYearDay(era, yoe, doy); // smart is same as strict
}
}