org.jivesoftware.util.FastDateFormat Maven / Gradle / Ivy
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/* ====================================================================
* Trove - Copyright (c) 1997-2001 Walt Disney Internet Group
* ====================================================================
* The Tea Software License, Version 1.1
*
* Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Walt Disney Internet Group (http://opensource.go.com/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "Tea",
* "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
* "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
* written permission of the Walt Disney Internet Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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*/
package org.jivesoftware.util;
import java.util.Date;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;
import java.text.DateFormatSymbols;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
/**
* Similar to {@link java.text.SimpleDateFormat}, but faster and thread-safe.
* Only formatting is supported, but all patterns are compatible with
* SimpleDateFormat.
*
* Note, this class is from the open source Tea project (http://sourceforge.net/projects/teatrove/).
*
* @author Brian S O'Neill
*/
public class FastDateFormat {
/** Style pattern */
public static final Object
FULL = new Integer(SimpleDateFormat.FULL),
LONG = new Integer(SimpleDateFormat.LONG),
MEDIUM = new Integer(SimpleDateFormat.MEDIUM),
SHORT = new Integer(SimpleDateFormat.SHORT);
private static final double LOG_10 = Math.log(10);
private static String cDefaultPattern;
private static TimeZone cDefaultTimeZone = TimeZone.getDefault();
private static Map cTimeZoneDisplayCache = new HashMap<>();
private static Map cInstanceCache = new HashMap<>(7);
private static Map cDateInstanceCache = new HashMap<>(7);
private static Map cTimeInstanceCache = new HashMap<>(7);
private static Map cDateTimeInstanceCache = new HashMap<>(7);
public static FastDateFormat getInstance() {
return getInstance(getDefaultPattern(), null, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
*/
public static FastDateFormat getInstance(String pattern)
throws IllegalArgumentException
{
return getInstance(pattern, null, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
*/
public static FastDateFormat getInstance
(String pattern, TimeZone timeZone) throws IllegalArgumentException
{
return getInstance(pattern, timeZone, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param locale optional locale, overrides system locale
*/
public static FastDateFormat getInstance
(String pattern, Locale locale) throws IllegalArgumentException
{
return getInstance(pattern, null, locale, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param symbols optional date format symbols, overrides symbols for
* system locale
*/
public static FastDateFormat getInstance
(String pattern, DateFormatSymbols symbols)
throws IllegalArgumentException
{
return getInstance(pattern, null, null, symbols);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
*/
public static FastDateFormat getInstance
(String pattern, TimeZone timeZone, Locale locale)
throws IllegalArgumentException
{
return getInstance(pattern, timeZone, locale, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
* @param symbols optional date format symbols, overrides symbols for
* provided locale
*/
public static synchronized FastDateFormat getInstance
(String pattern, TimeZone timeZone, Locale locale,
DateFormatSymbols symbols)
throws IllegalArgumentException
{
Object key = pattern;
if (timeZone != null) {
key = new Pair(key, timeZone);
}
if (locale != null) {
key = new Pair(key, locale);
}
if (symbols != null) {
key = new Pair(key, symbols);
}
FastDateFormat format = cInstanceCache.get(key);
if (format == null) {
if (locale == null) {
locale = Locale.getDefault();
}
if (symbols == null) {
symbols = new DateFormatSymbols(locale);
}
format = new FastDateFormat(pattern, timeZone, locale, symbols);
cInstanceCache.put(key, format);
}
return format;
}
/**
* @param style date style: FULL, LONG, MEDIUM, or SHORT
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
*/
public static synchronized FastDateFormat getDateInstance
(Object style, TimeZone timeZone, Locale locale)
throws IllegalArgumentException
{
Object key = style;
if (timeZone != null) {
key = new Pair(key, timeZone);
}
if (locale == null) {
key = new Pair(key, locale);
}
FastDateFormat format = cDateInstanceCache.get(key);
if (format == null) {
int ds;
try {
ds = ((Integer)style).intValue();
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("Illegal date style: " + style);
}
if (locale == null) {
locale = Locale.getDefault();
}
try {
String pattern = ((SimpleDateFormat)DateFormat.getDateInstance(ds, locale)).toPattern();
format = getInstance(pattern, timeZone, locale);
cDateInstanceCache.put(key, format);
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("No date pattern for locale: " + locale);
}
}
return format;
}
/**
* @param style time style: FULL, LONG, MEDIUM, or SHORT
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
*/
public static synchronized FastDateFormat getTimeInstance
(Object style, TimeZone timeZone, Locale locale)
throws IllegalArgumentException
{
Object key = style;
if (timeZone != null) {
key = new Pair(key, timeZone);
}
if (locale != null) {
key = new Pair(key, locale);
}
FastDateFormat format = cTimeInstanceCache.get(key);
if (format == null) {
int ts;
try {
ts = ((Integer)style).intValue();
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("Illegal time style: " + style);
}
if (locale == null) {
locale = Locale.getDefault();
}
try {
String pattern = ((SimpleDateFormat)DateFormat.getTimeInstance(ts, locale)).toPattern();
format = getInstance(pattern, timeZone, locale);
cTimeInstanceCache.put(key, format);
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("No date pattern for locale: " + locale);
}
}
return format;
}
/**
* @param dateStyle date style: FULL, LONG, MEDIUM, or SHORT
* @param timeStyle time style: FULL, LONG, MEDIUM, or SHORT
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
*/
public static synchronized FastDateFormat getDateTimeInstance
(Object dateStyle, Object timeStyle, TimeZone timeZone, Locale locale)
throws IllegalArgumentException
{
Object key = new Pair(dateStyle, timeStyle);
if (timeZone != null) {
key = new Pair(key, timeZone);
}
if (locale != null) {
key = new Pair(key, locale);
}
FastDateFormat format = cDateTimeInstanceCache.get(key);
if (format == null) {
int ds;
try {
ds = ((Integer)dateStyle).intValue();
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("Illegal date style: " + dateStyle);
}
int ts;
try {
ts = ((Integer)timeStyle).intValue();
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("Illegal time style: " + timeStyle);
}
if (locale == null) {
locale = Locale.getDefault();
}
try {
String pattern = ((SimpleDateFormat)DateFormat.getDateTimeInstance(ds, ts, locale)).toPattern();
format = getInstance(pattern, timeZone, locale);
cDateTimeInstanceCache.put(key, format);
}
catch (ClassCastException e) {
throw new IllegalArgumentException
("No date time pattern for locale: " + locale);
}
}
return format;
}
static synchronized String getTimeZoneDisplay(TimeZone tz,
boolean daylight,
int style,
Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
private static synchronized String getDefaultPattern() {
if (cDefaultPattern == null) {
cDefaultPattern = new SimpleDateFormat().toPattern();
}
return cDefaultPattern;
}
/**
* Returns a list of Rules.
*/
private static List parse(String pattern, TimeZone timeZone, Locale locale,
DateFormatSymbols symbols) {
List rules = new ArrayList<>();
String[] ERAs = symbols.getEras();
String[] months = symbols.getMonths();
String[] shortMonths = symbols.getShortMonths();
String[] weekdays = symbols.getWeekdays();
String[] shortWeekdays = symbols.getShortWeekdays();
String[] AmPmStrings = symbols.getAmPmStrings();
int length = pattern.length();
int[] indexRef = new int[1];
for (int i=0; i= 4) {
rule = new UnpaddedNumberField(Calendar.YEAR);
}
else {
rule = new TwoDigitYearField();
}
break;
case 'M': // month in year (text and number)
if (tokenLen >= 4) {
rule = new TextField(Calendar.MONTH, months);
}
else if (tokenLen == 3) {
rule = new TextField(Calendar.MONTH, shortMonths);
}
else if (tokenLen == 2) {
rule = new TwoDigitMonthField();
}
else {
rule = new UnpaddedMonthField();
}
break;
case 'd': // day in month (number)
rule = selectNumberRule(Calendar.DAY_OF_MONTH, tokenLen);
break;
case 'h': // hour in am/pm (number, 1..12)
rule = new TwelveHourField
(selectNumberRule(Calendar.HOUR, tokenLen));
break;
case 'H': // hour in day (number, 0..23)
rule = selectNumberRule(Calendar.HOUR_OF_DAY, tokenLen);
break;
case 'm': // minute in hour (number)
rule = selectNumberRule(Calendar.MINUTE, tokenLen);
break;
case 's': // second in minute (number)
rule = selectNumberRule(Calendar.SECOND, tokenLen);
break;
case 'S': // millisecond (number)
rule = selectNumberRule(Calendar.MILLISECOND, tokenLen);
break;
case 'E': // day in week (text)
rule = new TextField
(Calendar.DAY_OF_WEEK,
tokenLen < 4 ? shortWeekdays : weekdays);
break;
case 'D': // day in year (number)
rule = selectNumberRule(Calendar.DAY_OF_YEAR, tokenLen);
break;
case 'F': // day of week in month (number)
rule = selectNumberRule
(Calendar.DAY_OF_WEEK_IN_MONTH, tokenLen);
break;
case 'w': // week in year (number)
rule = selectNumberRule(Calendar.WEEK_OF_YEAR, tokenLen);
break;
case 'W': // week in month (number)
rule = selectNumberRule(Calendar.WEEK_OF_MONTH, tokenLen);
break;
case 'a': // am/pm marker (text)
rule = new TextField(Calendar.AM_PM, AmPmStrings);
break;
case 'k': // hour in day (1..24)
rule = new TwentyFourHourField
(selectNumberRule(Calendar.HOUR_OF_DAY, tokenLen));
break;
case 'K': // hour in am/pm (0..11)
rule = selectNumberRule(Calendar.HOUR, tokenLen);
break;
case 'z': // time zone (text)
if (tokenLen >= 4) {
rule = new TimeZoneRule(timeZone, locale, TimeZone.LONG);
}
else {
rule = new TimeZoneRule(timeZone, locale, TimeZone.SHORT);
}
break;
case '\'': // literal text
String sub = token.substring(1);
if (sub.length() == 1) {
rule = new CharacterLiteral(sub.charAt(0));
}
else {
rule = new StringLiteral(new String(sub));
}
break;
default:
throw new IllegalArgumentException
("Illegal pattern component: " + token);
}
rules.add(rule);
}
return rules;
}
private static String parseToken(String pattern, int[] indexRef) {
StringBuilder buf = new StringBuilder();
int i = indexRef[0];
int length = pattern.length();
char c = pattern.charAt(i);
if (c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z') {
// Scan a run of the same character, which indicates a time
// pattern.
buf.append(c);
while (i + 1 < length) {
char peek = pattern.charAt(i + 1);
if (peek == c) {
buf.append(c);
i++;
}
else {
break;
}
}
}
else {
// This will identify token as text.
buf.append('\'');
boolean inLiteral = false;
for (; i < length; i++) {
c = pattern.charAt(i);
if (c == '\'') {
if (i + 1 < length && pattern.charAt(i + 1) == '\'') {
// '' is treated as escaped '
i++;
buf.append(c);
}
else {
inLiteral = !inLiteral;
}
}
else if (!inLiteral &&
(c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z')) {
i--;
break;
}
else {
buf.append(c);
}
}
}
indexRef[0] = i;
return buf.toString();
}
private static NumberRule selectNumberRule(int field, int padding) {
switch (padding) {
case 1:
return new UnpaddedNumberField(field);
case 2:
return new TwoDigitNumberField(field);
default:
return new PaddedNumberField(field, padding);
}
}
private final String mPattern;
private final TimeZone mTimeZone;
private final Locale mLocale;
private final Rule[] mRules;
private final int mMaxLengthEstimate;
private FastDateFormat() {
this(getDefaultPattern(), null, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
*/
private FastDateFormat(String pattern) throws IllegalArgumentException {
this(pattern, null, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
*/
private FastDateFormat(String pattern, TimeZone timeZone)
throws IllegalArgumentException
{
this(pattern, timeZone, null, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param locale optional locale, overrides system locale
*/
private FastDateFormat(String pattern, Locale locale)
throws IllegalArgumentException
{
this(pattern, null, locale, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param symbols optional date format symbols, overrides symbols for
* system locale
*/
private FastDateFormat(String pattern, DateFormatSymbols symbols)
throws IllegalArgumentException
{
this(pattern, null, null, symbols);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
*/
private FastDateFormat(String pattern, TimeZone timeZone, Locale locale)
throws IllegalArgumentException
{
this(pattern, timeZone, locale, null);
}
/**
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
* @param timeZone optional time zone, overrides time zone of formatted
* date
* @param locale optional locale, overrides system locale
* @param symbols optional date format symbols, overrides symbols for
* provided locale
*/
private FastDateFormat(String pattern, TimeZone timeZone, Locale locale,
DateFormatSymbols symbols)
throws IllegalArgumentException
{
if (locale == null) {
locale = Locale.getDefault();
}
mPattern = pattern;
mTimeZone = timeZone;
mLocale = locale;
if (symbols == null) {
symbols = new DateFormatSymbols(locale);
}
List rulesList = parse(pattern, timeZone, locale, symbols);
mRules = (Rule[])rulesList.toArray(new Rule[rulesList.size()]);
int len = 0;
for (int i=mRules.length; --i >= 0; ) {
len += mRules[i].estimateLength();
}
mMaxLengthEstimate = len;
}
public String format(Date date) {
Calendar c = new GregorianCalendar(cDefaultTimeZone);
c.setTime(date);
if (mTimeZone != null) {
c.setTimeZone(mTimeZone);
}
return applyRules(c, new StringBuffer(mMaxLengthEstimate)).toString();
}
public String format(Calendar calendar) {
return format(calendar, new StringBuffer(mMaxLengthEstimate))
.toString();
}
public StringBuffer format(Date date, StringBuffer buf) {
Calendar c = new GregorianCalendar(cDefaultTimeZone);
c.setTime(date);
if (mTimeZone != null) {
c.setTimeZone(mTimeZone);
}
return applyRules(c, buf);
}
public StringBuffer format(Calendar calendar, StringBuffer buf) {
if (mTimeZone != null) {
calendar = (Calendar)calendar.clone();
calendar.setTimeZone(mTimeZone);
}
return applyRules(calendar, buf);
}
private StringBuffer applyRules(Calendar calendar, StringBuffer buf) {
Rule[] rules = mRules;
int len = mRules.length;
for (int i=0; i= 0; ) {
int len = mValues[i].length();
if (len > max) {
max = len;
}
}
return max;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
buffer.append(mValues[calendar.get(mField)]);
}
}
private static class UnpaddedNumberField implements NumberRule {
private final int mField;
UnpaddedNumberField(int field) {
mField = field;
}
@Override
public int estimateLength() {
return 4;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(mField));
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
if (value < 10) {
buffer.append((char)(value + '0'));
}
else if (value < 100) {
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
else {
buffer.append(Integer.toString(value));
}
}
}
private static class UnpaddedMonthField implements NumberRule {
UnpaddedMonthField() {
}
@Override
public int estimateLength() {
return 2;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(Calendar.MONTH) + 1);
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
if (value < 10) {
buffer.append((char)(value + '0'));
}
else {
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
}
}
private static class PaddedNumberField implements NumberRule {
private final int mField;
private final int mSize;
PaddedNumberField(int field, int size) {
if (size < 3) {
// Should use UnpaddedNumberField or TwoDigitNumberField.
throw new IllegalArgumentException();
}
mField = field;
mSize = size;
}
@Override
public int estimateLength() {
return 4;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(mField));
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
if (value < 100) {
for (int i = mSize; --i >= 2; ) {
buffer.append('0');
}
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
else {
int digits;
if (value < 1000) {
digits = 3;
}
else {
digits = (int)(Math.log(value) / LOG_10) + 1;
}
for (int i = mSize; --i >= digits; ) {
buffer.append('0');
}
buffer.append(Integer.toString(value));
}
}
}
private static class TwoDigitNumberField implements NumberRule {
private final int mField;
TwoDigitNumberField(int field) {
mField = field;
}
@Override
public int estimateLength() {
return 2;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(mField));
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
if (value < 100) {
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
else {
buffer.append(Integer.toString(value));
}
}
}
private static class TwoDigitYearField implements NumberRule {
TwoDigitYearField() {
}
@Override
public int estimateLength() {
return 2;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(Calendar.YEAR) % 100);
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
}
private static class TwoDigitMonthField implements NumberRule {
TwoDigitMonthField() {
}
@Override
public int estimateLength() {
return 2;
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
appendTo(buffer, calendar.get(Calendar.MONTH) + 1);
}
@Override
public final void appendTo(StringBuffer buffer, int value) {
buffer.append((char)(value / 10 + '0'));
buffer.append((char)(value % 10 + '0'));
}
}
private static class TwelveHourField implements NumberRule {
private final NumberRule mRule;
TwelveHourField(NumberRule rule) {
mRule = rule;
}
@Override
public int estimateLength() {
return mRule.estimateLength();
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
int value = calendar.get(Calendar.HOUR);
if (value == 0) {
value = calendar.getLeastMaximum(Calendar.HOUR) + 1;
}
mRule.appendTo(buffer, value);
}
@Override
public void appendTo(StringBuffer buffer, int value) {
mRule.appendTo(buffer, value);
}
}
private static class TwentyFourHourField implements NumberRule {
private final NumberRule mRule;
TwentyFourHourField(NumberRule rule) {
mRule = rule;
}
@Override
public int estimateLength() {
return mRule.estimateLength();
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
int value = calendar.get(Calendar.HOUR_OF_DAY);
if (value == 0) {
value = calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1;
}
mRule.appendTo(buffer, value);
}
@Override
public void appendTo(StringBuffer buffer, int value) {
mRule.appendTo(buffer, value);
}
}
private static class TimeZoneRule implements Rule {
private final TimeZone mTimeZone;
private final Locale mLocale;
private final int mStyle;
private final String mStandard;
private final String mDaylight;
TimeZoneRule(TimeZone timeZone, Locale locale, int style) {
mTimeZone = timeZone;
mLocale = locale;
mStyle = style;
if (timeZone != null) {
mStandard = getTimeZoneDisplay(timeZone, false, style, locale);
mDaylight = getTimeZoneDisplay(timeZone, true, style, locale);
}
else {
mStandard = null;
mDaylight = null;
}
}
@Override
public int estimateLength() {
if (mTimeZone != null) {
return Math.max(mStandard.length(), mDaylight.length());
}
else if (mStyle == TimeZone.SHORT) {
return 4;
}
else {
return 40;
}
}
@Override
public void appendTo(StringBuffer buffer, Calendar calendar) {
TimeZone timeZone;
if ((timeZone = mTimeZone) != null) {
if (timeZone.useDaylightTime() &&
calendar.get(Calendar.DST_OFFSET) != 0) {
buffer.append(mDaylight);
}
else {
buffer.append(mStandard);
}
}
else {
timeZone = calendar.getTimeZone();
if (timeZone.useDaylightTime() &&
calendar.get(Calendar.DST_OFFSET) != 0) {
buffer.append(getTimeZoneDisplay
(timeZone, true, mStyle, mLocale));
}
else {
buffer.append(getTimeZoneDisplay
(timeZone, false, mStyle, mLocale));
}
}
}
}
private static class TimeZoneDisplayKey {
private final TimeZone mTimeZone;
private final int mStyle;
private final Locale mLocale;
TimeZoneDisplayKey(TimeZone timeZone,
boolean daylight, int style, Locale locale) {
mTimeZone = timeZone;
if (daylight) {
style |= 0x80000000;
}
mStyle = style;
mLocale = locale;
}
@Override
public int hashCode() {
return mStyle * 31 + mLocale.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof TimeZoneDisplayKey) {
TimeZoneDisplayKey other = (TimeZoneDisplayKey)obj;
return
mTimeZone.equals(other.mTimeZone) &&
mStyle == other.mStyle &&
mLocale.equals(other.mLocale);
}
return false;
}
}
private static class Pair implements Comparable, java.io.Serializable {
private final Object mObj1;
private final Object mObj2;
public Pair(Object obj1, Object obj2) {
mObj1 = obj1;
mObj2 = obj2;
}
@Override
public int compareTo(Object obj) {
if (this == obj) {
return 0;
}
Pair other = (Pair)obj;
Object a = mObj1;
Object b = other.mObj1;
firstTest: {
if (a == null) {
if (b != null) {
return 1;
}
// Both a and b are null.
break firstTest;
}
else {
if (b == null) {
return -1;
}
}
int result = ((Comparable)a).compareTo(b);
if (result != 0) {
return result;
}
}
a = mObj2;
b = other.mObj2;
if (a == null) {
if (b != null) {
return 1;
}
// Both a and b are null.
return 0;
}
else {
if (b == null) {
return -1;
}
}
return ((Comparable)a).compareTo(b);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof Pair)) {
return false;
}
Pair key = (Pair)obj;
return
(mObj1 == null ?
key.mObj1 == null : mObj1.equals(key.mObj1)) &&
(mObj2 == null ?
key.mObj2 == null : mObj2.equals(key.mObj2));
}
@Override
public int hashCode() {
return
(mObj1 == null ? 0 : mObj1.hashCode()) +
(mObj2 == null ? 0 : mObj2.hashCode());
}
@Override
public String toString() {
return "[" + mObj1 + ':' + mObj2 + ']';
}
}
}