Java example source code file (BasicChronology.java)
The BasicChronology.java Java example source code
/*
* Copyright 2001-2015 Stephen Colebourne
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.joda.time.chrono;
import java.util.Locale;
import org.joda.time.Chronology;
import org.joda.time.DateTimeConstants;
import org.joda.time.DateTimeField;
import org.joda.time.DateTimeFieldType;
import org.joda.time.DateTimeZone;
import org.joda.time.DurationField;
import org.joda.time.DurationFieldType;
import org.joda.time.field.DividedDateTimeField;
import org.joda.time.field.FieldUtils;
import org.joda.time.field.MillisDurationField;
import org.joda.time.field.OffsetDateTimeField;
import org.joda.time.field.PreciseDateTimeField;
import org.joda.time.field.PreciseDurationField;
import org.joda.time.field.RemainderDateTimeField;
import org.joda.time.field.ZeroIsMaxDateTimeField;
/**
* Abstract implementation for calendar systems that use a typical
* day/month/year/leapYear model.
* Most of the utility methods required by subclasses are package-private,
* reflecting the intention that they be defined in the same package.
* <p>
* BasicChronology is thread-safe and immutable, and all subclasses must
* be as well.
*
* @author Stephen Colebourne
* @author Brian S O'Neill
* @author Guy Allard
* @since 1.2, renamed from BaseGJChronology
*/
abstract class BasicChronology extends AssembledChronology {
/** Serialization lock */
private static final long serialVersionUID = 8283225332206808863L;
private static final DurationField cMillisField;
private static final DurationField cSecondsField;
private static final DurationField cMinutesField;
private static final DurationField cHoursField;
private static final DurationField cHalfdaysField;
private static final DurationField cDaysField;
private static final DurationField cWeeksField;
private static final DateTimeField cMillisOfSecondField;
private static final DateTimeField cMillisOfDayField;
private static final DateTimeField cSecondOfMinuteField;
private static final DateTimeField cSecondOfDayField;
private static final DateTimeField cMinuteOfHourField;
private static final DateTimeField cMinuteOfDayField;
private static final DateTimeField cHourOfDayField;
private static final DateTimeField cHourOfHalfdayField;
private static final DateTimeField cClockhourOfDayField;
private static final DateTimeField cClockhourOfHalfdayField;
private static final DateTimeField cHalfdayOfDayField;
static {
cMillisField = MillisDurationField.INSTANCE;
cSecondsField = new PreciseDurationField
(DurationFieldType.seconds(), DateTimeConstants.MILLIS_PER_SECOND);
cMinutesField = new PreciseDurationField
(DurationFieldType.minutes(), DateTimeConstants.MILLIS_PER_MINUTE);
cHoursField = new PreciseDurationField
(DurationFieldType.hours(), DateTimeConstants.MILLIS_PER_HOUR);
cHalfdaysField = new PreciseDurationField
(DurationFieldType.halfdays(), DateTimeConstants.MILLIS_PER_DAY / 2);
cDaysField = new PreciseDurationField
(DurationFieldType.days(), DateTimeConstants.MILLIS_PER_DAY);
cWeeksField = new PreciseDurationField
(DurationFieldType.weeks(), DateTimeConstants.MILLIS_PER_WEEK);
cMillisOfSecondField = new PreciseDateTimeField
(DateTimeFieldType.millisOfSecond(), cMillisField, cSecondsField);
cMillisOfDayField = new PreciseDateTimeField
(DateTimeFieldType.millisOfDay(), cMillisField, cDaysField);
cSecondOfMinuteField = new PreciseDateTimeField
(DateTimeFieldType.secondOfMinute(), cSecondsField, cMinutesField);
cSecondOfDayField = new PreciseDateTimeField
(DateTimeFieldType.secondOfDay(), cSecondsField, cDaysField);
cMinuteOfHourField = new PreciseDateTimeField
(DateTimeFieldType.minuteOfHour(), cMinutesField, cHoursField);
cMinuteOfDayField = new PreciseDateTimeField
(DateTimeFieldType.minuteOfDay(), cMinutesField, cDaysField);
cHourOfDayField = new PreciseDateTimeField
(DateTimeFieldType.hourOfDay(), cHoursField, cDaysField);
cHourOfHalfdayField = new PreciseDateTimeField
(DateTimeFieldType.hourOfHalfday(), cHoursField, cHalfdaysField);
cClockhourOfDayField = new ZeroIsMaxDateTimeField
(cHourOfDayField, DateTimeFieldType.clockhourOfDay());
cClockhourOfHalfdayField = new ZeroIsMaxDateTimeField
(cHourOfHalfdayField, DateTimeFieldType.clockhourOfHalfday());
cHalfdayOfDayField = new HalfdayField();
}
private static final int CACHE_SIZE = 1 << 10;
private static final int CACHE_MASK = CACHE_SIZE - 1;
private transient final YearInfo[] iYearInfoCache = new YearInfo[CACHE_SIZE];
private final int iMinDaysInFirstWeek;
BasicChronology(Chronology base, Object param, int minDaysInFirstWeek) {
super(base, param);
if (minDaysInFirstWeek < 1 || minDaysInFirstWeek > 7) {
throw new IllegalArgumentException
("Invalid min days in first week: " + minDaysInFirstWeek);
}
iMinDaysInFirstWeek = minDaysInFirstWeek;
}
public DateTimeZone getZone() {
Chronology base;
if ((base = getBase()) != null) {
return base.getZone();
}
return DateTimeZone.UTC;
}
@Override
public long getDateTimeMillis(
int year, int monthOfYear, int dayOfMonth, int millisOfDay)
throws IllegalArgumentException {
Chronology base;
if ((base = getBase()) != null) {
return base.getDateTimeMillis(year, monthOfYear, dayOfMonth, millisOfDay);
}
FieldUtils.verifyValueBounds
(DateTimeFieldType.millisOfDay(), millisOfDay, 0, DateTimeConstants.MILLIS_PER_DAY - 1);
return getDateTimeMillis0(year, monthOfYear, dayOfMonth, millisOfDay);
}
@Override
public long getDateTimeMillis(
int year, int monthOfYear, int dayOfMonth,
int hourOfDay, int minuteOfHour, int secondOfMinute, int millisOfSecond)
throws IllegalArgumentException {
Chronology base;
if ((base = getBase()) != null) {
return base.getDateTimeMillis(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond);
}
FieldUtils.verifyValueBounds(DateTimeFieldType.hourOfDay(), hourOfDay, 0, 23);
FieldUtils.verifyValueBounds(DateTimeFieldType.minuteOfHour(), minuteOfHour, 0, 59);
FieldUtils.verifyValueBounds(DateTimeFieldType.secondOfMinute(), secondOfMinute, 0, 59);
FieldUtils.verifyValueBounds(DateTimeFieldType.millisOfSecond(), millisOfSecond, 0, 999);
long millisOfDay = hourOfDay * DateTimeConstants.MILLIS_PER_HOUR
+ minuteOfHour * DateTimeConstants.MILLIS_PER_MINUTE
+ secondOfMinute * DateTimeConstants.MILLIS_PER_SECOND
+ millisOfSecond;
return getDateTimeMillis0(year, monthOfYear, dayOfMonth, (int) millisOfDay);
}
private long getDateTimeMillis0(int year, int monthOfYear, int dayOfMonth, int millisOfDay) {
long dayInstant = getDateMidnightMillis(year, monthOfYear, dayOfMonth);
// try reversed calculation from next day for MIN
if (dayInstant == Long.MIN_VALUE) {
dayInstant = getDateMidnightMillis(year, monthOfYear, dayOfMonth + 1);
millisOfDay = millisOfDay - 86400000;
}
// check for limit caused by millisOfDay addition
// even if dayInstant already MIN or MAX, this still works fine with int math
long result = dayInstant + millisOfDay;
if (result < 0 && dayInstant > 0) {
return Long.MAX_VALUE;
} else if (result > 0 && dayInstant < 0) {
return Long.MIN_VALUE;
}
return result;
}
public int getMinimumDaysInFirstWeek() {
return iMinDaysInFirstWeek;
}
//-----------------------------------------------------------------------
/**
* Checks if this chronology instance equals another.
*
* @param obj the object to compare to
* @return true if equal
* @since 1.6
*/
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj != null && getClass() == obj.getClass()) {
BasicChronology chrono = (BasicChronology) obj;
return getMinimumDaysInFirstWeek() == chrono.getMinimumDaysInFirstWeek() &&
getZone().equals(chrono.getZone());
}
return false;
}
/**
* A suitable hash code for the chronology.
*
* @return the hash code
* @since 1.6
*/
public int hashCode() {
return getClass().getName().hashCode() * 11 + getZone().hashCode() + getMinimumDaysInFirstWeek();
}
// Output
//-----------------------------------------------------------------------
/**
* Gets a debugging toString.
*
* @return a debugging string
*/
public String toString() {
StringBuilder sb = new StringBuilder(60);
String name = getClass().getName();
int index = name.lastIndexOf('.');
if (index >= 0) {
name = name.substring(index + 1);
}
sb.append(name);
sb.append('[');
DateTimeZone zone = getZone();
if (zone != null) {
sb.append(zone.getID());
}
if (getMinimumDaysInFirstWeek() != 4) {
sb.append(",mdfw=");
sb.append(getMinimumDaysInFirstWeek());
}
sb.append(']');
return sb.toString();
}
protected void assemble(Fields fields) {
// First copy fields that are the same for all Gregorian and Julian
// chronologies.
fields.millis = cMillisField;
fields.seconds = cSecondsField;
fields.minutes = cMinutesField;
fields.hours = cHoursField;
fields.halfdays = cHalfdaysField;
fields.days = cDaysField;
fields.weeks = cWeeksField;
fields.millisOfSecond = cMillisOfSecondField;
fields.millisOfDay = cMillisOfDayField;
fields.secondOfMinute = cSecondOfMinuteField;
fields.secondOfDay = cSecondOfDayField;
fields.minuteOfHour = cMinuteOfHourField;
fields.minuteOfDay = cMinuteOfDayField;
fields.hourOfDay = cHourOfDayField;
fields.hourOfHalfday = cHourOfHalfdayField;
fields.clockhourOfDay = cClockhourOfDayField;
fields.clockhourOfHalfday = cClockhourOfHalfdayField;
fields.halfdayOfDay = cHalfdayOfDayField;
// Now create fields that have unique behavior for Gregorian and Julian
// chronologies.
fields.year = new BasicYearDateTimeField(this);
fields.yearOfEra = new GJYearOfEraDateTimeField(fields.year, this);
// Define one-based centuryOfEra and yearOfCentury.
DateTimeField field = new OffsetDateTimeField(
fields.yearOfEra, 99);
fields.centuryOfEra = new DividedDateTimeField(
field, DateTimeFieldType.centuryOfEra(), 100);
fields.centuries = fields.centuryOfEra.getDurationField();
field = new RemainderDateTimeField(
(DividedDateTimeField) fields.centuryOfEra);
fields.yearOfCentury = new OffsetDateTimeField(
field, DateTimeFieldType.yearOfCentury(), 1);
fields.era = new GJEraDateTimeField(this);
fields.dayOfWeek = new GJDayOfWeekDateTimeField(this, fields.days);
fields.dayOfMonth = new BasicDayOfMonthDateTimeField(this, fields.days);
fields.dayOfYear = new BasicDayOfYearDateTimeField(this, fields.days);
fields.monthOfYear = new GJMonthOfYearDateTimeField(this);
fields.weekyear = new BasicWeekyearDateTimeField(this);
fields.weekOfWeekyear = new BasicWeekOfWeekyearDateTimeField(this, fields.weeks);
field = new RemainderDateTimeField(
fields.weekyear, fields.centuries, DateTimeFieldType.weekyearOfCentury(), 100);
fields.weekyearOfCentury = new OffsetDateTimeField(
field, DateTimeFieldType.weekyearOfCentury(), 1);
// The remaining (imprecise) durations are available from the newly
// created datetime fields.
fields.years = fields.year.getDurationField();
fields.months = fields.monthOfYear.getDurationField();
fields.weekyears = fields.weekyear.getDurationField();
}
//-----------------------------------------------------------------------
/**
* Get the number of days in the year.
*
* @return 366
*/
int getDaysInYearMax() {
return 366;
}
/**
* Get the number of days in the year.
*
* @param year the year to use
* @return 366 if a leap year, otherwise 365
*/
int getDaysInYear(int year) {
return isLeapYear(year) ? 366 : 365;
}
/**
* Get the number of weeks in the year.
*
* @param year the year to use
* @return number of weeks in the year
*/
int getWeeksInYear(int year) {
long firstWeekMillis1 = getFirstWeekOfYearMillis(year);
long firstWeekMillis2 = getFirstWeekOfYearMillis(year + 1);
return (int) ((firstWeekMillis2 - firstWeekMillis1) / DateTimeConstants.MILLIS_PER_WEEK);
}
/**
* Get the millis for the first week of a year.
*
* @param year the year to use
* @return millis
*/
long getFirstWeekOfYearMillis(int year) {
long jan1millis = getYearMillis(year);
int jan1dayOfWeek = getDayOfWeek(jan1millis);
if (jan1dayOfWeek > (8 - iMinDaysInFirstWeek)) {
// First week is end of previous year because it doesn't have enough days.
return jan1millis + (8 - jan1dayOfWeek)
* (long)DateTimeConstants.MILLIS_PER_DAY;
} else {
// First week is start of this year because it has enough days.
return jan1millis - (jan1dayOfWeek - 1)
* (long)DateTimeConstants.MILLIS_PER_DAY;
}
}
/**
* Get the milliseconds for the start of a year.
*
* @param year The year to use.
* @return millis from 1970-01-01T00:00:00Z
*/
long getYearMillis(int year) {
return getYearInfo(year).iFirstDayMillis;
}
/**
* Get the milliseconds for the start of a month.
*
* @param year The year to use.
* @param month The month to use
* @return millis from 1970-01-01T00:00:00Z
*/
long getYearMonthMillis(int year, int month) {
long millis = getYearMillis(year);
millis += getTotalMillisByYearMonth(year, month);
return millis;
}
/**
* Get the milliseconds for a particular date.
*
* @param year The year to use.
* @param month The month to use
* @param dayOfMonth The day of the month to use
* @return millis from 1970-01-01T00:00:00Z
*/
long getYearMonthDayMillis(int year, int month, int dayOfMonth) {
long millis = getYearMillis(year);
millis += getTotalMillisByYearMonth(year, month);
return millis + (dayOfMonth - 1) * (long)DateTimeConstants.MILLIS_PER_DAY;
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getYear(long instant) {
// Get an initial estimate of the year, and the millis value that
// represents the start of that year. Then verify estimate and fix if
// necessary.
// Initial estimate uses values divided by two to avoid overflow.
long unitMillis = getAverageMillisPerYearDividedByTwo();
long i2 = (instant >> 1) + getApproxMillisAtEpochDividedByTwo();
if (i2 < 0) {
i2 = i2 - unitMillis + 1;
}
int year = (int) (i2 / unitMillis);
long yearStart = getYearMillis(year);
long diff = instant - yearStart;
if (diff < 0) {
year--;
} else if (diff >= DateTimeConstants.MILLIS_PER_DAY * 365L) {
// One year may need to be added to fix estimate.
long oneYear;
if (isLeapYear(year)) {
oneYear = DateTimeConstants.MILLIS_PER_DAY * 366L;
} else {
oneYear = DateTimeConstants.MILLIS_PER_DAY * 365L;
}
yearStart += oneYear;
if (yearStart <= instant) {
// Didn't go too far, so actually add one year.
year++;
}
}
return year;
}
/**
* @param millis from 1970-01-01T00:00:00Z
*/
int getMonthOfYear(long millis) {
return getMonthOfYear(millis, getYear(millis));
}
/**
* @param millis from 1970-01-01T00:00:00Z
* @param year precalculated year of millis
*/
abstract int getMonthOfYear(long millis, int year);
/**
* @param millis from 1970-01-01T00:00:00Z
*/
int getDayOfMonth(long millis) {
int year = getYear(millis);
int month = getMonthOfYear(millis, year);
return getDayOfMonth(millis, year, month);
}
/**
* @param millis from 1970-01-01T00:00:00Z
* @param year precalculated year of millis
*/
int getDayOfMonth(long millis, int year) {
int month = getMonthOfYear(millis, year);
return getDayOfMonth(millis, year, month);
}
/**
* @param millis from 1970-01-01T00:00:00Z
* @param year precalculated year of millis
* @param month precalculated month of millis
*/
int getDayOfMonth(long millis, int year, int month) {
long dateMillis = getYearMillis(year);
dateMillis += getTotalMillisByYearMonth(year, month);
return (int) ((millis - dateMillis) / DateTimeConstants.MILLIS_PER_DAY) + 1;
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getDayOfYear(long instant) {
return getDayOfYear(instant, getYear(instant));
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
* @param year precalculated year of millis
*/
int getDayOfYear(long instant, int year) {
long yearStart = getYearMillis(year);
return (int) ((instant - yearStart) / DateTimeConstants.MILLIS_PER_DAY) + 1;
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getWeekyear(long instant) {
int year = getYear(instant);
int week = getWeekOfWeekyear(instant, year);
if (week == 1) {
return getYear(instant + DateTimeConstants.MILLIS_PER_WEEK);
} else if (week > 51) {
return getYear(instant - (2 * DateTimeConstants.MILLIS_PER_WEEK));
} else {
return year;
}
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getWeekOfWeekyear(long instant) {
return getWeekOfWeekyear(instant, getYear(instant));
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
* @param year precalculated year of millis
*/
int getWeekOfWeekyear(long instant, int year) {
long firstWeekMillis1 = getFirstWeekOfYearMillis(year);
if (instant < firstWeekMillis1) {
return getWeeksInYear(year - 1);
}
long firstWeekMillis2 = getFirstWeekOfYearMillis(year + 1);
if (instant >= firstWeekMillis2) {
return 1;
}
return (int) ((instant - firstWeekMillis1) / DateTimeConstants.MILLIS_PER_WEEK) + 1;
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getDayOfWeek(long instant) {
// 1970-01-01 is day of week 4, Thursday.
long daysSince19700101;
if (instant >= 0) {
daysSince19700101 = instant / DateTimeConstants.MILLIS_PER_DAY;
} else {
daysSince19700101 = (instant - (DateTimeConstants.MILLIS_PER_DAY - 1))
/ DateTimeConstants.MILLIS_PER_DAY;
if (daysSince19700101 < -3) {
return 7 + (int) ((daysSince19700101 + 4) % 7);
}
}
return 1 + (int) ((daysSince19700101 + 3) % 7);
}
/**
* @param instant millis from 1970-01-01T00:00:00Z
*/
int getMillisOfDay(long instant) {
if (instant >= 0) {
return (int) (instant % DateTimeConstants.MILLIS_PER_DAY);
} else {
return (DateTimeConstants.MILLIS_PER_DAY - 1)
+ (int) ((instant + 1) % DateTimeConstants.MILLIS_PER_DAY);
}
}
/**
* Gets the maximum number of days in any month.
*
* @return 31
*/
int getDaysInMonthMax() {
return 31;
}
/**
* Gets the maximum number of days in the month specified by the instant.
*
* @param instant millis from 1970-01-01T00:00:00Z
* @return the maximum number of days in the month
*/
int getDaysInMonthMax(long instant) {
int thisYear = getYear(instant);
int thisMonth = getMonthOfYear(instant, thisYear);
return getDaysInYearMonth(thisYear, thisMonth);
}
/**
* Gets the maximum number of days in the month specified by the instant.
* The value represents what the user is trying to set, and can be
* used to optimise this method.
*
* @param instant millis from 1970-01-01T00:00:00Z
* @param value the value being set
* @return the maximum number of days in the month
*/
int getDaysInMonthMaxForSet(long instant, int value) {
return getDaysInMonthMax(instant);
}
//-----------------------------------------------------------------------
/**
* Gets the milliseconds for a date at midnight.
*
* @param year the year
* @param monthOfYear the month
* @param dayOfMonth the day
* @return the milliseconds
*/
long getDateMidnightMillis(int year, int monthOfYear, int dayOfMonth) {
FieldUtils.verifyValueBounds(DateTimeFieldType.year(), year, getMinYear() - 1, getMaxYear() + 1);
FieldUtils.verifyValueBounds(DateTimeFieldType.monthOfYear(), monthOfYear, 1, getMaxMonth(year));
FieldUtils.verifyValueBounds(DateTimeFieldType.dayOfMonth(), dayOfMonth, 1, getDaysInYearMonth(year, monthOfYear));
long instant = getYearMonthDayMillis(year, monthOfYear, dayOfMonth);
// check for limit caused by min/max year +1/-1
if (instant < 0 && year == getMaxYear() + 1) {
return Long.MAX_VALUE;
} else if (instant > 0 && year == getMinYear() - 1) {
return Long.MIN_VALUE;
}
return instant;
}
/**
* Gets the difference between the two instants in years.
*
* @param minuendInstant the first instant
* @param subtrahendInstant the second instant
* @return the difference
*/
abstract long getYearDifference(long minuendInstant, long subtrahendInstant);
/**
* Is the specified year a leap year?
*
* @param year the year to test
* @return true if leap
*/
abstract boolean isLeapYear(int year);
/**
* Is the specified instant a leap day?
*
* @param instant the instant to test
* @return true if leap, default is false
*/
boolean isLeapDay(long instant) {
return false;
}
/**
* Gets the number of days in the specified month and year.
*
* @param year the year
* @param month the month
* @return the number of days
*/
abstract int getDaysInYearMonth(int year, int month);
/**
* Gets the maximum days in the specified month.
*
* @param month the month
* @return the max days
*/
abstract int getDaysInMonthMax(int month);
/**
* Gets the total number of millis elapsed in this year at the start
* of the specified month, such as zero for month 1.
*
* @param year the year
* @param month the month
* @return the elapsed millis at the start of the month
*/
abstract long getTotalMillisByYearMonth(int year, int month);
/**
* Gets the millisecond value of the first day of the year.
*
* @return the milliseconds for the first of the year
*/
abstract long calculateFirstDayOfYearMillis(int year);
/**
* Gets the minimum supported year.
*
* @return the year
*/
abstract int getMinYear();
/**
* Gets the maximum supported year.
*
* @return the year
*/
abstract int getMaxYear();
/**
* Gets the maximum month for the specified year.
* This implementation calls getMaxMonth().
*
* @param year the year
* @return the maximum month value
*/
int getMaxMonth(int year) {
return getMaxMonth();
}
/**
* Gets the maximum number of months.
*
* @return 12
*/
int getMaxMonth() {
return 12;
}
/**
* Gets an average value for the milliseconds per year.
*
* @return the millis per year
*/
abstract long getAverageMillisPerYear();
/**
* Gets an average value for the milliseconds per year, divided by two.
*
* @return the millis per year divided by two
*/
abstract long getAverageMillisPerYearDividedByTwo();
/**
* Gets an average value for the milliseconds per month.
*
* @return the millis per month
*/
abstract long getAverageMillisPerMonth();
/**
* Returns a constant representing the approximate number of milliseconds
* elapsed from year 0 of this chronology, divided by two. This constant
* <em>must be defined as:
* <pre>
* (yearAtEpoch * averageMillisPerYear + millisOfYearAtEpoch) / 2
* </pre>
* where epoch is 1970-01-01 (Gregorian).
*/
abstract long getApproxMillisAtEpochDividedByTwo();
/**
* Sets the year from an instant and year.
*
* @param instant millis from 1970-01-01T00:00:00Z
* @param year the year to set
* @return the updated millis
*/
abstract long setYear(long instant, int year);
//-----------------------------------------------------------------------
// Although accessed by multiple threads, this method doesn't need to be synchronized.
private YearInfo getYearInfo(int year) {
YearInfo info = iYearInfoCache[year & CACHE_MASK];
if (info == null || info.iYear != year) {
info = new YearInfo(year, calculateFirstDayOfYearMillis(year));
iYearInfoCache[year & CACHE_MASK] = info;
}
return info;
}
private static class HalfdayField extends PreciseDateTimeField {
@SuppressWarnings("unused")
private static final long serialVersionUID = 581601443656929254L;
HalfdayField() {
super(DateTimeFieldType.halfdayOfDay(), cHalfdaysField, cDaysField);
}
public String getAsText(int fieldValue, Locale locale) {
return GJLocaleSymbols.forLocale(locale).halfdayValueToText(fieldValue);
}
public long set(long millis, String text, Locale locale) {
return set(millis, GJLocaleSymbols.forLocale(locale).halfdayTextToValue(text));
}
public int getMaximumTextLength(Locale locale) {
return GJLocaleSymbols.forLocale(locale).getHalfdayMaxTextLength();
}
}
private static class YearInfo {
public final int iYear;
public final long iFirstDayMillis;
YearInfo(int year, long firstDayMillis) {
iYear = year;
iFirstDayMillis = firstDayMillis;
}
}
}
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