/*
* Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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/*
* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
* (C) Copyright IBM Corp. 1996 - All Rights Reserved
*
* The original version of this source code and documentation is copyrighted
* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
* materials are provided under terms of a License Agreement between Taligent
* and Sun. This technology is protected by multiple US and International
* patents. This notice and attribution to Taligent may not be removed.
* Taligent is a registered trademark of Taligent, Inc.
*
*/
package java.text;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.ref.SoftReference;
import java.text.spi.DateFormatSymbolsProvider;
import java.util.Arrays;
import java.util.Locale;
import java.util.Objects;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import sun.util.locale.provider.CalendarDataUtility;
import sun.util.locale.provider.LocaleProviderAdapter;
import sun.util.locale.provider.LocaleServiceProviderPool;
import sun.util.locale.provider.ResourceBundleBasedAdapter;
import sun.util.locale.provider.TimeZoneNameUtility;
/**
* {@code DateFormatSymbols} is a public class for encapsulating
* localizable date-time formatting data, such as the names of the
* months, the names of the days of the week, and the time zone data.
* {@code SimpleDateFormat} uses
* {@code DateFormatSymbols} to encapsulate this information.
*
*
* Typically you shouldn't use {@code DateFormatSymbols} directly.
* Rather, you are encouraged to create a date-time formatter with the
* {@code DateFormat} class's factory methods: {@code getTimeInstance},
* {@code getDateInstance}, or {@code getDateTimeInstance}.
* These methods automatically create a {@code DateFormatSymbols} for
* the formatter so that you don't have to. After the
* formatter is created, you may modify its format pattern using the
* {@code setPattern} method. For more information about
* creating formatters using {@code DateFormat}'s factory methods,
* see {@link DateFormat}.
*
*
* If you decide to create a date-time formatter with a specific
* format pattern for a specific locale, you can do so with:
*
*
* new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale)).
*
*
*
* If the locale contains "rg" (region override)
* Unicode extension,
* the symbols are overridden for the designated region.
*
*
* {@code DateFormatSymbols} objects are cloneable. When you obtain
* a {@code DateFormatSymbols} object, feel free to modify the
* date-time formatting data. For instance, you can replace the localized
* date-time format pattern characters with the ones that you feel easy
* to remember. Or you can change the representative cities
* to your favorite ones.
*
*
* New {@code DateFormatSymbols} subclasses may be added to support
* {@code SimpleDateFormat} for date-time formatting for additional locales.
*
* @see DateFormat
* @see SimpleDateFormat
* @see java.util.SimpleTimeZone
* @author Chen-Lieh Huang
* @since 1.1
*/
public class DateFormatSymbols implements Serializable, Cloneable {
/**
* Construct a DateFormatSymbols object by loading format data from
* resources for the default {@link java.util.Locale.Category#FORMAT FORMAT}
* locale. This constructor can only
* construct instances for the locales supported by the Java
* runtime environment, not for those supported by installed
* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
* implementations. For full locale coverage, use the
* {@link #getInstance(Locale) getInstance} method.
*
This is equivalent to calling
* {@link #DateFormatSymbols(Locale)
* DateFormatSymbols(Locale.getDefault(Locale.Category.FORMAT))}.
* @see #getInstance()
* @see java.util.Locale#getDefault(java.util.Locale.Category)
* @see java.util.Locale.Category#FORMAT
* @throws java.util.MissingResourceException
* if the resources for the default locale cannot be
* found or cannot be loaded.
*/
public DateFormatSymbols()
{
initializeData(Locale.getDefault(Locale.Category.FORMAT));
}
/**
* Construct a DateFormatSymbols object by loading format data from
* resources for the given locale. This constructor can only
* construct instances for the locales supported by the Java
* runtime environment, not for those supported by installed
* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
* implementations. For full locale coverage, use the
* {@link #getInstance(Locale) getInstance} method.
*
* @param locale the desired locale
* @see #getInstance(Locale)
* @throws java.util.MissingResourceException
* if the resources for the specified locale cannot be
* found or cannot be loaded.
*/
public DateFormatSymbols(Locale locale)
{
initializeData(locale);
}
/**
* Constructs an uninitialized DateFormatSymbols.
*/
private DateFormatSymbols(boolean flag) {
}
/**
* Era strings. For example: "AD" and "BC". An array of 2 strings,
* indexed by {@code Calendar.BC} and {@code Calendar.AD}.
* @serial
*/
String eras[] = null;
/**
* Month strings. For example: "January", "February", etc. An array
* of 13 strings (some calendars have 13 months), indexed by
* {@code Calendar.JANUARY}, {@code Calendar.FEBRUARY}, etc.
* @serial
*/
String months[] = null;
/**
* Short month strings. For example: "Jan", "Feb", etc. An array of
* 13 strings (some calendars have 13 months), indexed by
* {@code Calendar.JANUARY}, {@code Calendar.FEBRUARY}, etc.
* @serial
*/
String shortMonths[] = null;
/**
* Weekday strings. For example: "Sunday", "Monday", etc. An array
* of 8 strings, indexed by {@code Calendar.SUNDAY},
* {@code Calendar.MONDAY}, etc.
* The element {@code weekdays[0]} is ignored.
* @serial
*/
String weekdays[] = null;
/**
* Short weekday strings. For example: "Sun", "Mon", etc. An array
* of 8 strings, indexed by {@code Calendar.SUNDAY},
* {@code Calendar.MONDAY}, etc.
* The element {@code shortWeekdays[0]} is ignored.
* @serial
*/
String shortWeekdays[] = null;
/**
* AM and PM strings. For example: "AM" and "PM". An array of
* 2 strings, indexed by {@code Calendar.AM} and
* {@code Calendar.PM}.
* @serial
*/
String ampms[] = null;
/**
* Localized names of time zones in this locale. This is a
* two-dimensional array of strings of size n by m,
* where m is at least 5. Each of the n rows is an
* entry containing the localized names for a single {@code TimeZone}.
* Each such row contains (with {@code i} ranging from
* 0..n-1):
*
* - {@code zoneStrings[i][0]} - time zone ID
* - {@code zoneStrings[i][1]} - long name of zone in standard
* time
* - {@code zoneStrings[i][2]} - short name of zone in
* standard time
* - {@code zoneStrings[i][3]} - long name of zone in daylight
* saving time
* - {@code zoneStrings[i][4]} - short name of zone in daylight
* saving time
*
* The zone ID is not localized; it's one of the valid IDs of
* the {@link java.util.TimeZone TimeZone} class that are not
* custom IDs.
* All other entries are localized names.
* @see java.util.TimeZone
* @serial
*/
String zoneStrings[][] = null;
/**
* Indicates that zoneStrings is set externally with setZoneStrings() method.
*/
transient boolean isZoneStringsSet = false;
/**
* Unlocalized date-time pattern characters. For example: 'y', 'd', etc.
* All locales use the same these unlocalized pattern characters.
*/
static final String patternChars = "GyMdkHmsSEDFwWahKzZYuXL";
static final int PATTERN_ERA = 0; // G
static final int PATTERN_YEAR = 1; // y
static final int PATTERN_MONTH = 2; // M
static final int PATTERN_DAY_OF_MONTH = 3; // d
static final int PATTERN_HOUR_OF_DAY1 = 4; // k
static final int PATTERN_HOUR_OF_DAY0 = 5; // H
static final int PATTERN_MINUTE = 6; // m
static final int PATTERN_SECOND = 7; // s
static final int PATTERN_MILLISECOND = 8; // S
static final int PATTERN_DAY_OF_WEEK = 9; // E
static final int PATTERN_DAY_OF_YEAR = 10; // D
static final int PATTERN_DAY_OF_WEEK_IN_MONTH = 11; // F
static final int PATTERN_WEEK_OF_YEAR = 12; // w
static final int PATTERN_WEEK_OF_MONTH = 13; // W
static final int PATTERN_AM_PM = 14; // a
static final int PATTERN_HOUR1 = 15; // h
static final int PATTERN_HOUR0 = 16; // K
static final int PATTERN_ZONE_NAME = 17; // z
static final int PATTERN_ZONE_VALUE = 18; // Z
static final int PATTERN_WEEK_YEAR = 19; // Y
static final int PATTERN_ISO_DAY_OF_WEEK = 20; // u
static final int PATTERN_ISO_ZONE = 21; // X
static final int PATTERN_MONTH_STANDALONE = 22; // L
/**
* Localized date-time pattern characters. For example, a locale may
* wish to use 'u' rather than 'y' to represent years in its date format
* pattern strings.
* This string must be exactly 18 characters long, with the index of
* the characters described by {@code DateFormat.ERA_FIELD},
* {@code DateFormat.YEAR_FIELD}, etc. Thus, if the string were
* "Xz...", then localized patterns would use 'X' for era and 'z' for year.
* @serial
*/
String localPatternChars = null;
/**
* The locale which is used for initializing this DateFormatSymbols object.
*
* @since 1.6
* @serial
*/
Locale locale = null;
/* use serialVersionUID from JDK 1.1.4 for interoperability */
@java.io.Serial
static final long serialVersionUID = -5987973545549424702L;
/**
* Returns an array of all locales for which the
* {@code getInstance} methods of this class can return
* localized instances.
* The returned array represents the union of locales supported by the
* Java runtime and by installed
* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
* implementations. It must contain at least a {@code Locale}
* instance equal to {@link java.util.Locale#US Locale.US}.
*
* @return An array of locales for which localized
* {@code DateFormatSymbols} instances are available.
* @since 1.6
*/
public static Locale[] getAvailableLocales() {
LocaleServiceProviderPool pool=
LocaleServiceProviderPool.getPool(DateFormatSymbolsProvider.class);
return pool.getAvailableLocales();
}
/**
* Gets the {@code DateFormatSymbols} instance for the default
* locale. This method provides access to {@code DateFormatSymbols}
* instances for locales supported by the Java runtime itself as well
* as for those supported by installed
* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
* implementations.
* This is equivalent to calling {@link #getInstance(Locale)
* getInstance(Locale.getDefault(Locale.Category.FORMAT))}.
* @see java.util.Locale#getDefault(java.util.Locale.Category)
* @see java.util.Locale.Category#FORMAT
* @return a {@code DateFormatSymbols} instance.
* @since 1.6
*/
public static final DateFormatSymbols getInstance() {
return getInstance(Locale.getDefault(Locale.Category.FORMAT));
}
/**
* Gets the {@code DateFormatSymbols} instance for the specified
* locale. This method provides access to {@code DateFormatSymbols}
* instances for locales supported by the Java runtime itself as well
* as for those supported by installed
* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
* implementations.
* @param locale the given locale.
* @return a {@code DateFormatSymbols} instance.
* @throws NullPointerException if {@code locale} is null
* @since 1.6
*/
public static final DateFormatSymbols getInstance(Locale locale) {
DateFormatSymbols dfs = getProviderInstance(locale);
if (dfs != null) {
return dfs;
}
throw new RuntimeException("DateFormatSymbols instance creation failed.");
}
/**
* Returns a DateFormatSymbols provided by a provider or found in
* the cache. Note that this method returns a cached instance,
* not its clone. Therefore, the instance should never be given to
* an application.
*/
static final DateFormatSymbols getInstanceRef(Locale locale) {
DateFormatSymbols dfs = getProviderInstance(locale);
if (dfs != null) {
return dfs;
}
throw new RuntimeException("DateFormatSymbols instance creation failed.");
}
private static DateFormatSymbols getProviderInstance(Locale locale) {
LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, locale);
DateFormatSymbolsProvider provider = adapter.getDateFormatSymbolsProvider();
DateFormatSymbols dfsyms = provider.getInstance(locale);
if (dfsyms == null) {
provider = LocaleProviderAdapter.forJRE().getDateFormatSymbolsProvider();
dfsyms = provider.getInstance(locale);
}
return dfsyms;
}
/**
* Gets era strings. For example: "AD" and "BC".
* @return the era strings.
*/
public String[] getEras() {
return Arrays.copyOf(eras, eras.length);
}
/**
* Sets era strings. For example: "AD" and "BC".
* @param newEras the new era strings.
*/
public void setEras(String[] newEras) {
eras = Arrays.copyOf(newEras, newEras.length);
cachedHashCode = 0;
}
/**
* Gets month strings. For example: "January", "February", etc.
* An array with either 12 or 13 elements will be returned depending
* on whether or not {@link java.util.Calendar#UNDECIMBER Calendar.UNDECIMBER}
* is supported. Use
* {@link java.util.Calendar#JANUARY Calendar.JANUARY},
* {@link java.util.Calendar#FEBRUARY Calendar.FEBRUARY},
* etc. to index the result array.
*
*
If the language requires different forms for formatting and
* stand-alone usages, this method returns month names in the
* formatting form. For example, the preferred month name for
* January in the Czech language is ledna in the
* formatting form, while it is leden in the stand-alone
* form. This method returns {@code "ledna"} in this case. Refer
* to the
* Calendar Elements in the Unicode Locale Data Markup Language
* (LDML) specification for more details.
*
* @implSpec This method returns 13 elements since
* {@link java.util.Calendar#UNDECIMBER Calendar.UNDECIMBER} is supported.
* @return the month strings.
*/
public String[] getMonths() {
return Arrays.copyOf(months, months.length);
}
/**
* Sets month strings. For example: "January", "February", etc.
* @param newMonths the new month strings. The array should
* be indexed by {@link java.util.Calendar#JANUARY Calendar.JANUARY},
* {@link java.util.Calendar#FEBRUARY Calendar.FEBRUARY}, etc.
*/
public void setMonths(String[] newMonths) {
months = Arrays.copyOf(newMonths, newMonths.length);
cachedHashCode = 0;
}
/**
* Gets short month strings. For example: "Jan", "Feb", etc.
* An array with either 12 or 13 elements will be returned depending
* on whether or not {@link java.util.Calendar#UNDECIMBER Calendar.UNDECIMBER}
* is supported. Use
* {@link java.util.Calendar#JANUARY Calendar.JANUARY},
* {@link java.util.Calendar#FEBRUARY Calendar.FEBRUARY},
* etc. to index the result array.
*
*
If the language requires different forms for formatting and
* stand-alone usages, this method returns short month names in
* the formatting form. For example, the preferred abbreviation
* for January in the Catalan language is de gen. in the
* formatting form, while it is gen. in the stand-alone
* form. This method returns {@code "de gen."} in this case. Refer
* to the
* Calendar Elements in the Unicode Locale Data Markup Language
* (LDML) specification for more details.
*
* @implSpec This method returns 13 elements since
* {@link java.util.Calendar#UNDECIMBER Calendar.UNDECIMBER} is supported.
* @return the short month strings.
*/
public String[] getShortMonths() {
return Arrays.copyOf(shortMonths, shortMonths.length);
}
/**
* Sets short month strings. For example: "Jan", "Feb", etc.
* @param newShortMonths the new short month strings. The array should
* be indexed by {@link java.util.Calendar#JANUARY Calendar.JANUARY},
* {@link java.util.Calendar#FEBRUARY Calendar.FEBRUARY}, etc.
*/
public void setShortMonths(String[] newShortMonths) {
shortMonths = Arrays.copyOf(newShortMonths, newShortMonths.length);
cachedHashCode = 0;
}
/**
* Gets weekday strings. For example: "Sunday", "Monday", etc.
* @return the weekday strings. Use
* {@link java.util.Calendar#SUNDAY Calendar.SUNDAY},
* {@link java.util.Calendar#MONDAY Calendar.MONDAY}, etc. to index
* the result array.
*/
public String[] getWeekdays() {
return Arrays.copyOf(weekdays, weekdays.length);
}
/**
* Sets weekday strings. For example: "Sunday", "Monday", etc.
* @param newWeekdays the new weekday strings. The array should
* be indexed by {@link java.util.Calendar#SUNDAY Calendar.SUNDAY},
* {@link java.util.Calendar#MONDAY Calendar.MONDAY}, etc.
*/
public void setWeekdays(String[] newWeekdays) {
weekdays = Arrays.copyOf(newWeekdays, newWeekdays.length);
cachedHashCode = 0;
}
/**
* Gets short weekday strings. For example: "Sun", "Mon", etc.
* @return the short weekday strings. Use
* {@link java.util.Calendar#SUNDAY Calendar.SUNDAY},
* {@link java.util.Calendar#MONDAY Calendar.MONDAY}, etc. to index
* the result array.
*/
public String[] getShortWeekdays() {
return Arrays.copyOf(shortWeekdays, shortWeekdays.length);
}
/**
* Sets short weekday strings. For example: "Sun", "Mon", etc.
* @param newShortWeekdays the new short weekday strings. The array should
* be indexed by {@link java.util.Calendar#SUNDAY Calendar.SUNDAY},
* {@link java.util.Calendar#MONDAY Calendar.MONDAY}, etc.
*/
public void setShortWeekdays(String[] newShortWeekdays) {
shortWeekdays = Arrays.copyOf(newShortWeekdays, newShortWeekdays.length);
cachedHashCode = 0;
}
/**
* Gets ampm strings. For example: "AM" and "PM".
* @return the ampm strings.
*/
public String[] getAmPmStrings() {
return Arrays.copyOf(ampms, ampms.length);
}
/**
* Sets ampm strings. For example: "AM" and "PM".
* @param newAmpms the new ampm strings.
*/
public void setAmPmStrings(String[] newAmpms) {
ampms = Arrays.copyOf(newAmpms, newAmpms.length);
cachedHashCode = 0;
}
/**
* Gets time zone strings. Use of this method is discouraged; use
* {@link java.util.TimeZone#getDisplayName() TimeZone.getDisplayName()}
* instead.
*
* The value returned is a
* two-dimensional array of strings of size n by m,
* where m is at least 5. Each of the n rows is an
* entry containing the localized names for a single {@code TimeZone}.
* Each such row contains (with {@code i} ranging from
* 0..n-1):
*
* - {@code zoneStrings[i][0]} - time zone ID
* - {@code zoneStrings[i][1]} - long name of zone in standard
* time
* - {@code zoneStrings[i][2]} - short name of zone in
* standard time
* - {@code zoneStrings[i][3]} - long name of zone in daylight
* saving time
* - {@code zoneStrings[i][4]} - short name of zone in daylight
* saving time
*
* The zone ID is not localized; it's one of the valid IDs of
* the {@link java.util.TimeZone TimeZone} class that are not
* custom IDs.
* All other entries are localized names. If a zone does not implement
* daylight saving time, the daylight saving time names should not be used.
*
* If {@link #setZoneStrings(String[][]) setZoneStrings} has been called
* on this {@code DateFormatSymbols} instance, then the strings
* provided by that call are returned. Otherwise, the returned array
* contains names provided by the Java runtime and by installed
* {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider}
* implementations.
*
* @return the time zone strings.
* @see #setZoneStrings(String[][])
*/
public String[][] getZoneStrings() {
return getZoneStringsImpl(true);
}
/**
* Sets time zone strings. The argument must be a
* two-dimensional array of strings of size n by m,
* where m is at least 5. Each of the n rows is an
* entry containing the localized names for a single {@code TimeZone}.
* Each such row contains (with {@code i} ranging from
* 0..n-1):
*
* - {@code zoneStrings[i][0]} - time zone ID
* - {@code zoneStrings[i][1]} - long name of zone in standard
* time
* - {@code zoneStrings[i][2]} - short name of zone in
* standard time
* - {@code zoneStrings[i][3]} - long name of zone in daylight
* saving time
* - {@code zoneStrings[i][4]} - short name of zone in daylight
* saving time
*
* The zone ID is not localized; it's one of the valid IDs of
* the {@link java.util.TimeZone TimeZone} class that are not
* custom IDs.
* All other entries are localized names.
*
* @param newZoneStrings the new time zone strings.
* @throws IllegalArgumentException if the length of any row in
* {@code newZoneStrings} is less than 5
* @throws NullPointerException if {@code newZoneStrings} is null
* @see #getZoneStrings()
*/
public void setZoneStrings(String[][] newZoneStrings) {
String[][] aCopy = new String[newZoneStrings.length][];
for (int i = 0; i < newZoneStrings.length; ++i) {
int len = newZoneStrings[i].length;
if (len < 5) {
throw new IllegalArgumentException();
}
aCopy[i] = Arrays.copyOf(newZoneStrings[i], len);
}
zoneStrings = aCopy;
isZoneStringsSet = true;
cachedHashCode = 0;
}
/**
* Gets localized date-time pattern characters. For example: 'u', 't', etc.
* @return the localized date-time pattern characters.
*/
public String getLocalPatternChars() {
return localPatternChars;
}
/**
* Sets localized date-time pattern characters. For example: 'u', 't', etc.
* @param newLocalPatternChars the new localized date-time
* pattern characters.
*/
public void setLocalPatternChars(String newLocalPatternChars) {
// Call toString() to throw an NPE in case the argument is null
localPatternChars = newLocalPatternChars.toString();
cachedHashCode = 0;
}
/**
* Overrides Cloneable
*/
public Object clone()
{
try
{
DateFormatSymbols other = (DateFormatSymbols)super.clone();
copyMembers(this, other);
return other;
} catch (CloneNotSupportedException e) {
throw new InternalError(e);
}
}
/**
* Override hashCode.
* Generates a hash code for the DateFormatSymbols object.
*/
@Override
public int hashCode() {
int hashCode = cachedHashCode;
if (hashCode == 0) {
hashCode = 5;
hashCode = 11 * hashCode + Arrays.hashCode(eras);
hashCode = 11 * hashCode + Arrays.hashCode(months);
hashCode = 11 * hashCode + Arrays.hashCode(shortMonths);
hashCode = 11 * hashCode + Arrays.hashCode(weekdays);
hashCode = 11 * hashCode + Arrays.hashCode(shortWeekdays);
hashCode = 11 * hashCode + Arrays.hashCode(ampms);
hashCode = 11 * hashCode + Arrays.deepHashCode(getZoneStringsWrapper());
hashCode = 11 * hashCode + Objects.hashCode(localPatternChars);
if (hashCode != 0) {
cachedHashCode = hashCode;
}
}
return hashCode;
}
/**
* Override equals
*/
public boolean equals(Object obj)
{
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
DateFormatSymbols that = (DateFormatSymbols) obj;
return (Arrays.equals(eras, that.eras)
&& Arrays.equals(months, that.months)
&& Arrays.equals(shortMonths, that.shortMonths)
&& Arrays.equals(weekdays, that.weekdays)
&& Arrays.equals(shortWeekdays, that.shortWeekdays)
&& Arrays.equals(ampms, that.ampms)
&& Arrays.deepEquals(getZoneStringsWrapper(), that.getZoneStringsWrapper())
&& ((localPatternChars != null
&& localPatternChars.equals(that.localPatternChars))
|| (localPatternChars == null
&& that.localPatternChars == null)));
}
// =======================privates===============================
/**
* Useful constant for defining time zone offsets.
*/
static final int millisPerHour = 60*60*1000;
/**
* Cache to hold DateFormatSymbols instances per Locale.
*/
private static final ConcurrentMap> cachedInstances
= new ConcurrentHashMap<>(3);
private transient int lastZoneIndex;
/**
* Cached hash code
*/
transient volatile int cachedHashCode;
/**
* Initializes this DateFormatSymbols with the locale data. This method uses
* a cached DateFormatSymbols instance for the given locale if available. If
* there's no cached one, this method creates an uninitialized instance and
* populates its fields from the resource bundle for the locale, and caches
* the instance. Note: zoneStrings isn't initialized in this method.
*/
private void initializeData(Locale locale) {
SoftReference ref = cachedInstances.get(locale);
DateFormatSymbols dfs;
if (ref == null || (dfs = ref.get()) == null) {
if (ref != null) {
// Remove the empty SoftReference
cachedInstances.remove(locale, ref);
}
dfs = new DateFormatSymbols(false);
// check for region override
Locale override = CalendarDataUtility.findRegionOverride(locale);
// Initialize the fields from the ResourceBundle for locale.
LocaleProviderAdapter adapter
= LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, override);
// Avoid any potential recursions
if (!(adapter instanceof ResourceBundleBasedAdapter)) {
adapter = LocaleProviderAdapter.getResourceBundleBased();
}
ResourceBundle resource
= ((ResourceBundleBasedAdapter)adapter).getLocaleData().getDateFormatData(override);
dfs.locale = locale;
// JRE and CLDR use different keys
// JRE: Eras, short.Eras and narrow.Eras
// CLDR: long.Eras, Eras and narrow.Eras
if (resource.containsKey("Eras")) {
dfs.eras = resource.getStringArray("Eras");
} else if (resource.containsKey("long.Eras")) {
dfs.eras = resource.getStringArray("long.Eras");
} else if (resource.containsKey("short.Eras")) {
dfs.eras = resource.getStringArray("short.Eras");
}
dfs.months = resource.getStringArray("MonthNames");
dfs.shortMonths = resource.getStringArray("MonthAbbreviations");
dfs.ampms = resource.getStringArray("AmPmMarkers");
dfs.localPatternChars = resource.getString("DateTimePatternChars");
// Day of week names are stored in a 1-based array.
dfs.weekdays = toOneBasedArray(resource.getStringArray("DayNames"));
dfs.shortWeekdays = toOneBasedArray(resource.getStringArray("DayAbbreviations"));
// Put dfs in the cache
ref = new SoftReference<>(dfs);
SoftReference x = cachedInstances.putIfAbsent(locale, ref);
if (x != null) {
DateFormatSymbols y = x.get();
if (y == null) {
// Replace the empty SoftReference with ref.
cachedInstances.replace(locale, x, ref);
} else {
ref = x;
dfs = y;
}
}
}
// Copy the field values from dfs to this instance.
copyMembers(dfs, this);
}
private static String[] toOneBasedArray(String[] src) {
int len = src.length;
String[] dst = new String[len + 1];
dst[0] = "";
for (int i = 0; i < len; i++) {
dst[i + 1] = src[i];
}
return dst;
}
/**
* Package private: used by SimpleDateFormat
* Gets the index for the given time zone ID to obtain the time zone
* strings for formatting. The time zone ID is just for programmatic
* lookup. NOT LOCALIZED!!!
* @param ID the given time zone ID.
* @return the index of the given time zone ID. Returns -1 if
* the given time zone ID can't be located in the DateFormatSymbols object.
* @see java.util.SimpleTimeZone
*/
final int getZoneIndex(String ID) {
String[][] zoneStrings = getZoneStringsWrapper();
/*
* getZoneIndex has been re-written for performance reasons. instead of
* traversing the zoneStrings array every time, we cache the last used zone
* index
*/
if (lastZoneIndex < zoneStrings.length && ID.equals(zoneStrings[lastZoneIndex][0])) {
return lastZoneIndex;
}
/* slow path, search entire list */
for (int index = 0; index < zoneStrings.length; index++) {
if (ID.equals(zoneStrings[index][0])) {
lastZoneIndex = index;
return index;
}
}
return -1;
}
/**
* Wrapper method to the getZoneStrings(), which is called from inside
* the java.text package and not to mutate the returned arrays, so that
* it does not need to create a defensive copy.
*/
final String[][] getZoneStringsWrapper() {
if (isSubclassObject()) {
return getZoneStrings();
} else {
return getZoneStringsImpl(false);
}
}
private String[][] getZoneStringsImpl(boolean needsCopy) {
if (zoneStrings == null) {
zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
}
if (!needsCopy) {
return zoneStrings;
}
int len = zoneStrings.length;
String[][] aCopy = new String[len][];
for (int i = 0; i < len; i++) {
aCopy[i] = Arrays.copyOf(zoneStrings[i], zoneStrings[i].length);
}
return aCopy;
}
private boolean isSubclassObject() {
return !getClass().getName().equals("java.text.DateFormatSymbols");
}
/**
* Clones all the data members from the source DateFormatSymbols to
* the target DateFormatSymbols.
*
* @param src the source DateFormatSymbols.
* @param dst the target DateFormatSymbols.
*/
private void copyMembers(DateFormatSymbols src, DateFormatSymbols dst)
{
dst.locale = src.locale;
dst.eras = Arrays.copyOf(src.eras, src.eras.length);
dst.months = Arrays.copyOf(src.months, src.months.length);
dst.shortMonths = Arrays.copyOf(src.shortMonths, src.shortMonths.length);
dst.weekdays = Arrays.copyOf(src.weekdays, src.weekdays.length);
dst.shortWeekdays = Arrays.copyOf(src.shortWeekdays, src.shortWeekdays.length);
dst.ampms = Arrays.copyOf(src.ampms, src.ampms.length);
if (src.zoneStrings != null) {
dst.zoneStrings = src.getZoneStringsImpl(true);
} else {
dst.zoneStrings = null;
}
dst.localPatternChars = src.localPatternChars;
dst.cachedHashCode = 0;
}
/**
* Write out the default serializable data, after ensuring the
* {@code zoneStrings} field is initialized in order to make
* sure the backward compatibility.
*
* @since 1.6
*/
@java.io.Serial
private void writeObject(ObjectOutputStream stream) throws IOException {
if (zoneStrings == null) {
zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
}
stream.defaultWriteObject();
}
}