| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * Copyright (c) 1996, 2021, 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * (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.util; |
| |
| import android.icu.text.TimeZoneNames; |
| import com.android.i18n.timezone.ZoneInfoData; |
| import com.android.i18n.timezone.ZoneInfoDb; |
| import com.android.icu.util.ExtendedTimeZone; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.time.ZoneId; |
| import java.util.function.Supplier; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import libcore.io.IoUtils; |
| import libcore.util.ZoneInfo; |
| |
| import dalvik.system.RuntimeHooks; |
| |
| /** |
| * {@code TimeZone} represents a time zone offset, and also figures out daylight |
| * savings. |
| * |
| * <p> |
| * Typically, you get a {@code TimeZone} using {@code getDefault} |
| * which creates a {@code TimeZone} based on the time zone where the program |
| * is running. For example, for a program running in Japan, {@code getDefault} |
| * creates a {@code TimeZone} object based on Japanese Standard Time. |
| * |
| * <p> |
| * You can also get a {@code TimeZone} using {@code getTimeZone} |
| * along with a time zone ID. For instance, the time zone ID for the |
| * U.S. Pacific Time zone is "America/Los_Angeles". So, you can get a |
| * U.S. Pacific Time {@code TimeZone} object with: |
| * <blockquote><pre> |
| * TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles"); |
| * </pre></blockquote> |
| * You can use the {@code getAvailableIDs} method to iterate through |
| * all the supported time zone IDs. You can then choose a |
| * supported ID to get a {@code TimeZone}. |
| * If the time zone you want is not represented by one of the |
| * supported IDs, then a custom time zone ID can be specified to |
| * produce a TimeZone. The syntax of a custom time zone ID is: |
| * |
| * <blockquote><pre> |
| * <a id="CustomID"><i>CustomID:</i></a> |
| * {@code GMT} <i>Sign</i> <i>Hours</i> {@code :} <i>Minutes</i> |
| * {@code GMT} <i>Sign</i> <i>Hours</i> <i>Minutes</i> |
| * {@code GMT} <i>Sign</i> <i>Hours</i> |
| * <i>Sign:</i> one of |
| * {@code + -} |
| * <i>Hours:</i> |
| * <i>Digit</i> |
| * <i>Digit</i> <i>Digit</i> |
| * <i>Minutes:</i> |
| * <i>Digit</i> <i>Digit</i> |
| * <i>Digit:</i> one of |
| * {@code 0 1 2 3 4 5 6 7 8 9} |
| * </pre></blockquote> |
| * |
| * <i>Hours</i> must be between 0 to 23 and <i>Minutes</i> must be |
| * between 00 to 59. For example, "GMT+10" and "GMT+0010" mean ten |
| * hours and ten minutes ahead of GMT, respectively. |
| * <p> |
| * The format is locale independent and digits must be taken from the |
| * Basic Latin block of the Unicode standard. No daylight saving time |
| * transition schedule can be specified with a custom time zone ID. If |
| * the specified string doesn't match the syntax, {@code "GMT"} |
| * is used. |
| * <p> |
| * When creating a {@code TimeZone}, the specified custom time |
| * zone ID is normalized in the following syntax: |
| * <blockquote><pre> |
| * <a id="NormalizedCustomID"><i>NormalizedCustomID:</i></a> |
| * {@code GMT} <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i> |
| * <i>Sign:</i> one of |
| * {@code + -} |
| * <i>TwoDigitHours:</i> |
| * <i>Digit</i> <i>Digit</i> |
| * <i>Minutes:</i> |
| * <i>Digit</i> <i>Digit</i> |
| * <i>Digit:</i> one of |
| * {@code 0 1 2 3 4 5 6 7 8 9} |
| * </pre></blockquote> |
| * For example, TimeZone.getTimeZone("GMT-8").getID() returns "GMT-08:00". |
| * |
| * <h2>Three-letter time zone IDs</h2> |
| * |
| * For compatibility with JDK 1.1.x, some other three-letter time zone IDs |
| * (such as "PST", "CTT", "AST") are also supported. However, <strong>their |
| * use is deprecated</strong> because the same abbreviation is often used |
| * for multiple time zones (for example, "CST" could be U.S. "Central Standard |
| * Time" and "China Standard Time"), and the Java platform can then only |
| * recognize one of them. |
| * |
| * |
| * @see Calendar |
| * @see GregorianCalendar |
| * @see SimpleTimeZone |
| * @author Mark Davis, David Goldsmith, Chen-Lieh Huang, Alan Liu |
| * @since 1.1 |
| */ |
| public abstract class TimeZone implements Serializable, Cloneable { |
| /** |
| * Sole constructor. (For invocation by subclass constructors, typically |
| * implicit.) |
| */ |
| public TimeZone() { |
| } |
| |
| /** |
| * A style specifier for {@code getDisplayName()} indicating |
| * a short name, such as "PST." |
| * @see #LONG |
| * @since 1.2 |
| */ |
| public static final int SHORT = 0; |
| |
| /** |
| * A style specifier for {@code getDisplayName()} indicating |
| * a long name, such as "Pacific Standard Time." |
| * @see #SHORT |
| * @since 1.2 |
| */ |
| public static final int LONG = 1; |
| |
| // Android-changed: Use a preload holder to allow compile-time initialization of TimeZone and |
| // dependents. |
| private static class NoImagePreloadHolder { |
| public static final Pattern CUSTOM_ZONE_ID_PATTERN = Pattern.compile("^GMT[-+](\\d{1,2})(:?(\\d\\d))?$"); |
| } |
| |
| // Proclaim serialization compatibility with JDK 1.1 |
| @java.io.Serial |
| static final long serialVersionUID = 3581463369166924961L; |
| |
| // Android-changed: common timezone instances. |
| private static final TimeZone GMT = new SimpleTimeZone(0, "GMT"); |
| private static final TimeZone UTC = new SimpleTimeZone(0, "UTC"); |
| |
| /** |
| * Gets the time zone offset, for current date, modified in case of |
| * daylight savings. This is the offset to add to UTC to get local time. |
| * <p> |
| * This method returns a historically correct offset if an |
| * underlying {@code TimeZone} implementation subclass |
| * supports historical Daylight Saving Time schedule and GMT |
| * offset changes. |
| * |
| * @param era the era of the given date. |
| * @param year the year in the given date. |
| * @param month the month in the given date. |
| * Month is 0-based. e.g., 0 for January. |
| * @param day the day-in-month of the given date. |
| * @param dayOfWeek the day-of-week of the given date. |
| * @param milliseconds the milliseconds in day in <em>standard</em> |
| * local time. |
| * |
| * @return the offset in milliseconds to add to GMT to get local time. |
| * |
| * @see Calendar#ZONE_OFFSET |
| * @see Calendar#DST_OFFSET |
| */ |
| public abstract int getOffset(int era, int year, int month, int day, |
| int dayOfWeek, int milliseconds); |
| |
| /** |
| * Returns the offset of this time zone from UTC at the specified |
| * date. If Daylight Saving Time is in effect at the specified |
| * date, the offset value is adjusted with the amount of daylight |
| * saving. |
| * <p> |
| * This method returns a historically correct offset value if an |
| * underlying TimeZone implementation subclass supports historical |
| * Daylight Saving Time schedule and GMT offset changes. |
| * |
| * @param date the date represented in milliseconds since January 1, 1970 00:00:00 GMT |
| * @return the amount of time in milliseconds to add to UTC to get local time. |
| * |
| * @see Calendar#ZONE_OFFSET |
| * @see Calendar#DST_OFFSET |
| * @since 1.4 |
| */ |
| public int getOffset(long date) { |
| if (inDaylightTime(new Date(date))) { |
| return getRawOffset() + getDSTSavings(); |
| } |
| return getRawOffset(); |
| } |
| |
| /** |
| * Gets the raw GMT offset and the amount of daylight saving of this |
| * time zone at the given time. |
| * @param date the milliseconds (since January 1, 1970, |
| * 00:00:00.000 GMT) at which the time zone offset and daylight |
| * saving amount are found |
| * @param offsets an array of int where the raw GMT offset |
| * (offset[0]) and daylight saving amount (offset[1]) are stored, |
| * or null if those values are not needed. The method assumes that |
| * the length of the given array is two or larger. |
| * @return the total amount of the raw GMT offset and daylight |
| * saving at the specified date. |
| * |
| * @see Calendar#ZONE_OFFSET |
| * @see Calendar#DST_OFFSET |
| */ |
| int getOffsets(long date, int[] offsets) { |
| int rawoffset = getRawOffset(); |
| int dstoffset = 0; |
| if (inDaylightTime(new Date(date))) { |
| dstoffset = getDSTSavings(); |
| } |
| if (offsets != null) { |
| offsets[0] = rawoffset; |
| offsets[1] = dstoffset; |
| } |
| return rawoffset + dstoffset; |
| } |
| |
| /** |
| * Sets the base time zone offset to GMT. |
| * This is the offset to add to UTC to get local time. |
| * <p> |
| * If an underlying {@code TimeZone} implementation subclass |
| * supports historical GMT offset changes, the specified GMT |
| * offset is set as the latest GMT offset and the difference from |
| * the known latest GMT offset value is used to adjust all |
| * historical GMT offset values. |
| * |
| * @param offsetMillis the given base time zone offset to GMT. |
| */ |
| public abstract void setRawOffset(int offsetMillis); |
| |
| /** |
| * Returns the amount of time in milliseconds to add to UTC to get |
| * standard time in this time zone. Because this value is not |
| * affected by daylight saving time, it is called <I>raw |
| * offset</I>. |
| * <p> |
| * If an underlying {@code TimeZone} implementation subclass |
| * supports historical GMT offset changes, the method returns the |
| * raw offset value of the current date. In Honolulu, for example, |
| * its raw offset changed from GMT-10:30 to GMT-10:00 in 1947, and |
| * this method always returns -36000000 milliseconds (i.e., -10 |
| * hours). |
| * |
| * @return the amount of raw offset time in milliseconds to add to UTC. |
| * @see Calendar#ZONE_OFFSET |
| */ |
| public abstract int getRawOffset(); |
| |
| /** |
| * Gets the ID of this time zone. |
| * @return the ID of this time zone. |
| */ |
| public String getID() |
| { |
| return ID; |
| } |
| |
| /** |
| * Sets the time zone ID. This does not change any other data in |
| * the time zone object. |
| * @param ID the new time zone ID. |
| */ |
| public void setID(String ID) |
| { |
| if (ID == null) { |
| throw new NullPointerException(); |
| } |
| this.ID = ID; |
| } |
| |
| /** |
| * Returns a long standard time name of this {@code TimeZone} suitable for |
| * presentation to the user in the default locale. |
| * |
| * <p>This method is equivalent to: |
| * <blockquote><pre> |
| * getDisplayName(false, {@link #LONG}, |
| * Locale.getDefault({@link Locale.Category#DISPLAY})) |
| * </pre></blockquote> |
| * |
| * @return the human-readable name of this time zone in the default locale. |
| * @since 1.2 |
| * @see #getDisplayName(boolean, int, Locale) |
| * @see Locale#getDefault(Locale.Category) |
| * @see Locale.Category |
| */ |
| public final String getDisplayName() { |
| return getDisplayName(false, LONG, |
| Locale.getDefault(Locale.Category.DISPLAY)); |
| } |
| |
| /** |
| * Returns a long standard time name of this {@code TimeZone} suitable for |
| * presentation to the user in the specified {@code locale}. |
| * |
| * <p>This method is equivalent to: |
| * <blockquote><pre> |
| * getDisplayName(false, {@link #LONG}, locale) |
| * </pre></blockquote> |
| * |
| * @param locale the locale in which to supply the display name. |
| * @return the human-readable name of this time zone in the given locale. |
| * @throws NullPointerException if {@code locale} is {@code null}. |
| * @since 1.2 |
| * @see #getDisplayName(boolean, int, Locale) |
| */ |
| public final String getDisplayName(Locale locale) { |
| return getDisplayName(false, LONG, locale); |
| } |
| |
| /** |
| * Returns a name in the specified {@code style} of this {@code TimeZone} |
| * suitable for presentation to the user in the default locale. If the |
| * specified {@code daylight} is {@code true}, a Daylight Saving Time name |
| * is returned (even if this {@code TimeZone} doesn't observe Daylight Saving |
| * Time). Otherwise, a Standard Time name is returned. |
| * |
| * <p>This method is equivalent to: |
| * <blockquote><pre> |
| * getDisplayName(daylight, style, |
| * Locale.getDefault({@link Locale.Category#DISPLAY})) |
| * </pre></blockquote> |
| * |
| * @param daylight {@code true} specifying a Daylight Saving Time name, or |
| * {@code false} specifying a Standard Time name |
| * @param style either {@link #LONG} or {@link #SHORT} |
| * @return the human-readable name of this time zone in the default locale. |
| * @throws IllegalArgumentException if {@code style} is invalid. |
| * @since 1.2 |
| * @see #getDisplayName(boolean, int, Locale) |
| * @see Locale#getDefault(Locale.Category) |
| * @see Locale.Category |
| * @see java.text.DateFormatSymbols#getZoneStrings() |
| */ |
| public final String getDisplayName(boolean daylight, int style) { |
| return getDisplayName(daylight, style, |
| Locale.getDefault(Locale.Category.DISPLAY)); |
| } |
| |
| /** |
| * Returns the {@link #SHORT short} or {@link #LONG long} name of this time |
| * zone with either standard or daylight time, as written in {@code locale}. |
| * If the name is not available, the result is in the format |
| * {@code GMT[+-]hh:mm}. |
| * |
| * @param daylightTime true for daylight time, false for standard time. |
| * @param style either {@link TimeZone#LONG} or {@link TimeZone#SHORT}. |
| * @param locale the display locale. |
| */ |
| public String getDisplayName(boolean daylightTime, int style, Locale locale) { |
| // BEGIN Android-changed: implement using android.icu.text.TimeZoneNames |
| TimeZoneNames.NameType nameType; |
| switch (style) { |
| case SHORT: |
| nameType = daylightTime |
| ? TimeZoneNames.NameType.SHORT_DAYLIGHT |
| : TimeZoneNames.NameType.SHORT_STANDARD; |
| break; |
| case LONG: |
| nameType = daylightTime |
| ? TimeZoneNames.NameType.LONG_DAYLIGHT |
| : TimeZoneNames.NameType.LONG_STANDARD; |
| break; |
| default: |
| throw new IllegalArgumentException("Illegal style: " + style); |
| } |
| String canonicalID = android.icu.util.TimeZone.getCanonicalID(getID()); |
| if (canonicalID != null) { |
| TimeZoneNames names = TimeZoneNames.getInstance(locale); |
| long now = System.currentTimeMillis(); |
| String displayName = names.getDisplayName(canonicalID, nameType, now); |
| if (displayName != null) { |
| return displayName; |
| } |
| } |
| |
| // We get here if this is a custom timezone or ICU doesn't have name data for the specific |
| // style and locale. |
| int offsetMillis = getRawOffset(); |
| if (daylightTime) { |
| offsetMillis += getDSTSavings(); |
| } |
| return createGmtOffsetString(true /* includeGmt */, true /* includeMinuteSeparator */, |
| offsetMillis); |
| // END Android-changed: implement using android.icu.text.TimeZoneNames |
| } |
| |
| // BEGIN Android-added: utility method to format an offset as a GMT offset string. |
| /** |
| * Returns a string representation of an offset from UTC. |
| * |
| * <p>The format is "[GMT](+|-)HH[:]MM". The output is not localized. |
| * |
| * @param includeGmt true to include "GMT", false to exclude |
| * @param includeMinuteSeparator true to include the separator between hours and minutes, false |
| * to exclude. |
| * @param offsetMillis the offset from UTC |
| * |
| * @hide used internally by SimpleDateFormat |
| */ |
| public static String createGmtOffsetString(boolean includeGmt, |
| boolean includeMinuteSeparator, int offsetMillis) { |
| int offsetMinutes = offsetMillis / 60000; |
| char sign = '+'; |
| if (offsetMinutes < 0) { |
| sign = '-'; |
| offsetMinutes = -offsetMinutes; |
| } |
| StringBuilder builder = new StringBuilder(9); |
| if (includeGmt) { |
| builder.append("GMT"); |
| } |
| builder.append(sign); |
| appendNumber(builder, 2, offsetMinutes / 60); |
| if (includeMinuteSeparator) { |
| builder.append(':'); |
| } |
| appendNumber(builder, 2, offsetMinutes % 60); |
| return builder.toString(); |
| } |
| |
| private static void appendNumber(StringBuilder builder, int count, int value) { |
| String string = Integer.toString(value); |
| for (int i = 0; i < count - string.length(); i++) { |
| builder.append('0'); |
| } |
| builder.append(string); |
| } |
| // END Android-added: utility method to format an offset as a GMT offset string. |
| |
| /** |
| * Returns the amount of time to be added to local standard time |
| * to get local wall clock time. |
| * |
| * <p>The default implementation returns 3600000 milliseconds |
| * (i.e., one hour) if a call to {@link #useDaylightTime()} |
| * returns {@code true}. Otherwise, 0 (zero) is returned. |
| * |
| * <p>If an underlying {@code TimeZone} implementation subclass |
| * supports historical and future Daylight Saving Time schedule |
| * changes, this method returns the amount of saving time of the |
| * last known Daylight Saving Time rule that can be a future |
| * prediction. |
| * |
| * <p>If the amount of saving time at any given time stamp is |
| * required, construct a {@link Calendar} with this {@code |
| * TimeZone} and the time stamp, and call {@link Calendar#get(int) |
| * Calendar.get}{@code (}{@link Calendar#DST_OFFSET}{@code )}. |
| * |
| * @return the amount of saving time in milliseconds |
| * @since 1.4 |
| * @see #inDaylightTime(Date) |
| * @see #getOffset(long) |
| * @see #getOffset(int,int,int,int,int,int) |
| * @see Calendar#ZONE_OFFSET |
| */ |
| public int getDSTSavings() { |
| if (useDaylightTime()) { |
| return 3600000; |
| } |
| return 0; |
| } |
| |
| /** |
| * Queries if this {@code TimeZone} uses Daylight Saving Time. |
| * |
| * <p>If an underlying {@code TimeZone} implementation subclass |
| * supports historical and future Daylight Saving Time schedule |
| * changes, this method refers to the last known Daylight Saving Time |
| * rule that can be a future prediction and may not be the same as |
| * the current rule. Consider calling {@link #observesDaylightTime()} |
| * if the current rule should also be taken into account. |
| * |
| * @return {@code true} if this {@code TimeZone} uses Daylight Saving Time, |
| * {@code false}, otherwise. |
| * @see #inDaylightTime(Date) |
| * @see Calendar#DST_OFFSET |
| */ |
| public abstract boolean useDaylightTime(); |
| |
| /** |
| * Returns {@code true} if this {@code TimeZone} is currently in |
| * Daylight Saving Time, or if a transition from Standard Time to |
| * Daylight Saving Time occurs at any future time. |
| * |
| * <p>The default implementation returns {@code true} if |
| * {@code useDaylightTime()} or {@code inDaylightTime(new Date())} |
| * returns {@code true}. |
| * |
| * @return {@code true} if this {@code TimeZone} is currently in |
| * Daylight Saving Time, or if a transition from Standard Time to |
| * Daylight Saving Time occurs at any future time; {@code false} |
| * otherwise. |
| * @since 1.7 |
| * @see #useDaylightTime() |
| * @see #inDaylightTime(Date) |
| * @see Calendar#DST_OFFSET |
| */ |
| public boolean observesDaylightTime() { |
| return useDaylightTime() || inDaylightTime(new Date()); |
| } |
| |
| /** |
| * Queries if the given {@code date} is in Daylight Saving Time in |
| * this time zone. |
| * |
| * @param date the given Date. |
| * @return {@code true} if the given date is in Daylight Saving Time, |
| * {@code false}, otherwise. |
| */ |
| public abstract boolean inDaylightTime(Date date); |
| |
| /** |
| * Gets the {@code TimeZone} for the given ID. |
| * |
| * @param id the ID for a <code>TimeZone</code>, either an abbreviation |
| * such as "PST", a full name such as "America/Los_Angeles", or a custom |
| * ID such as "GMT-8:00". Note that the support of abbreviations is |
| * for JDK 1.1.x compatibility only and full names should be used. |
| * |
| * @return the specified {@code TimeZone}, or the GMT zone if the given ID |
| * cannot be understood. |
| */ |
| // Android-changed: param s/ID/id; use ZoneInfoDb instead of ZoneInfo class. |
| public static synchronized TimeZone getTimeZone(String id) { |
| if (id == null) { |
| throw new NullPointerException("id == null"); |
| } |
| |
| // Special cases? These can clone an existing instance. |
| if (id.length() == 3) { |
| if (id.equals("GMT")) { |
| return (TimeZone) GMT.clone(); |
| } |
| if (id.equals("UTC")) { |
| return (TimeZone) UTC.clone(); |
| } |
| } |
| |
| // In the database? |
| |
| ZoneInfoData zoneInfoData = ZoneInfoDb.getInstance().makeZoneInfoData(id); |
| TimeZone zone = zoneInfoData == null ? null : ZoneInfo.createZoneInfo(zoneInfoData); |
| |
| // Custom time zone? |
| if (zone == null && id.length() > 3 && id.startsWith("GMT")) { |
| zone = getCustomTimeZone(id); |
| } |
| |
| // We never return null; on failure we return the equivalent of "GMT". |
| return (zone != null) ? zone : (TimeZone) GMT.clone(); |
| } |
| |
| /** |
| * Gets the {@code TimeZone} for the given {@code zoneId}. |
| * |
| * @param zoneId a {@link ZoneId} from which the time zone ID is obtained |
| * @return the specified {@code TimeZone}, or the GMT zone if the given ID |
| * cannot be understood. |
| * @throws NullPointerException if {@code zoneId} is {@code null} |
| * @since 1.8 |
| */ |
| public static TimeZone getTimeZone(ZoneId zoneId) { |
| String tzid = zoneId.getId(); // throws an NPE if null |
| char c = tzid.charAt(0); |
| if (c == '+' || c == '-') { |
| tzid = "GMT" + tzid; |
| } else if (c == 'Z' && tzid.length() == 1) { |
| tzid = "UTC"; |
| } |
| return getTimeZone(tzid); |
| } |
| |
| /** |
| * Converts this {@code TimeZone} object to a {@code ZoneId}. |
| * |
| * @return a {@code ZoneId} representing the same time zone as this |
| * {@code TimeZone} |
| * @since 1.8 |
| */ |
| public ZoneId toZoneId() { |
| // Android-changed: don't support "old mapping" |
| return ZoneId.of(getID(), ZoneId.SHORT_IDS); |
| } |
| |
| /** |
| * Returns a new SimpleTimeZone for an ID of the form "GMT[+|-]hh[[:]mm]", or null. |
| */ |
| private static TimeZone getCustomTimeZone(String id) { |
| Matcher m = NoImagePreloadHolder.CUSTOM_ZONE_ID_PATTERN.matcher(id); |
| if (!m.matches()) { |
| return null; |
| } |
| |
| int hour; |
| int minute = 0; |
| try { |
| hour = Integer.parseInt(m.group(1)); |
| if (m.group(3) != null) { |
| minute = Integer.parseInt(m.group(3)); |
| } |
| } catch (NumberFormatException impossible) { |
| throw new AssertionError(impossible); |
| } |
| |
| if (hour < 0 || hour > 23 || minute < 0 || minute > 59) { |
| return null; |
| } |
| |
| char sign = id.charAt(3); |
| int raw = (hour * 3600000) + (minute * 60000); |
| if (sign == '-') { |
| raw = -raw; |
| } |
| |
| String cleanId = String.format(Locale.ROOT, "GMT%c%02d:%02d", sign, hour, minute); |
| |
| return new SimpleTimeZone(raw, cleanId); |
| } |
| |
| /** |
| * Gets the available IDs according to the given time zone offset in milliseconds. |
| * |
| * @param rawOffset the given time zone GMT offset in milliseconds. |
| * @return an array of IDs, where the time zone for that ID has |
| * the specified GMT offset. For example, "America/Phoenix" and "America/Denver" |
| * both have GMT-07:00, but differ in daylight saving behavior. |
| * @see #getRawOffset() |
| */ |
| public static synchronized String[] getAvailableIDs(int rawOffset) { |
| return ZoneInfoDb.getInstance().getAvailableIDs(rawOffset); |
| } |
| |
| /** |
| * Gets all the available IDs supported. |
| * @return an array of IDs. |
| */ |
| public static synchronized String[] getAvailableIDs() { |
| return ZoneInfoDb.getInstance().getAvailableIDs(); |
| } |
| |
| /** |
| * Gets the platform defined TimeZone ID. |
| **/ |
| private static native String getSystemTimeZoneID(String javaHome, |
| String country); |
| |
| /** |
| * Gets the custom time zone ID based on the GMT offset of the |
| * platform. (e.g., "GMT+08:00") |
| */ |
| private static native String getSystemGMTOffsetID(); |
| |
| /** |
| * Gets the default <code>TimeZone</code> for this host. |
| * The source of the default <code>TimeZone</code> |
| * may vary with implementation. |
| * @return a default <code>TimeZone</code>. |
| * @see #setDefault |
| */ |
| public static TimeZone getDefault() { |
| return (TimeZone) getDefaultRef().clone(); |
| } |
| |
| /** |
| * Returns the reference to the default TimeZone object. This |
| * method doesn't create a clone. |
| */ |
| static synchronized TimeZone getDefaultRef() { |
| if (defaultTimeZone == null) { |
| Supplier<String> tzGetter = RuntimeHooks.getTimeZoneIdSupplier(); |
| String zoneName = (tzGetter != null) ? tzGetter.get() : null; |
| if (zoneName != null) { |
| zoneName = zoneName.trim(); |
| } |
| if (zoneName == null || zoneName.isEmpty()) { |
| try { |
| // On the host, we can find the configured timezone here. |
| zoneName = IoUtils.readFileAsString("/etc/timezone"); |
| } catch (IOException ex) { |
| // "vogar --mode device" can end up here. |
| // TODO: give libcore access to Android system properties and read "persist.sys.timezone". |
| zoneName = "GMT"; |
| } |
| } |
| defaultTimeZone = TimeZone.getTimeZone(zoneName); |
| } |
| return defaultTimeZone; |
| } |
| |
| /** |
| * Sets the {@code TimeZone} that is returned by the {@code getDefault} |
| * method. {@code timeZone} is cached. If {@code timeZone} is null, the cached |
| * default {@code TimeZone} is cleared. This method doesn't change the value |
| * of the {@code user.timezone} property. |
| * |
| * @param timeZone the new default {@code TimeZone}, or null |
| * @see #getDefault |
| */ |
| // Android-changed: s/zone/timeZone, synchronized, removed mention of SecurityException |
| public synchronized static void setDefault(TimeZone timeZone) |
| { |
| @SuppressWarnings("removal") |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| sm.checkPermission(new PropertyPermission |
| ("user.timezone", "write")); |
| } |
| defaultTimeZone = timeZone != null ? (TimeZone) timeZone.clone() : null; |
| // Android-changed: notify ICU4J of changed default TimeZone. |
| ExtendedTimeZone.clearDefaultTimeZone(); |
| } |
| |
| /** |
| * Returns true if this zone has the same rule and offset as another zone. |
| * That is, if this zone differs only in ID, if at all. Returns false |
| * if the other zone is null. |
| * @param other the {@code TimeZone} object to be compared with |
| * @return true if the other zone is not null and is the same as this one, |
| * with the possible exception of the ID |
| * @since 1.2 |
| */ |
| public boolean hasSameRules(TimeZone other) { |
| return other != null && getRawOffset() == other.getRawOffset() && |
| useDaylightTime() == other.useDaylightTime(); |
| } |
| |
| /** |
| * Creates a copy of this {@code TimeZone}. |
| * |
| * @return a clone of this {@code TimeZone} |
| */ |
| public Object clone() |
| { |
| try { |
| return super.clone(); |
| } catch (CloneNotSupportedException e) { |
| throw new InternalError(e); |
| } |
| } |
| |
| /** |
| * The null constant as a TimeZone. |
| */ |
| static final TimeZone NO_TIMEZONE = null; |
| |
| // =======================privates=============================== |
| |
| /** |
| * The string identifier of this {@code TimeZone}. This is a |
| * programmatic identifier used internally to look up {@code TimeZone} |
| * objects from the system table and also to map them to their localized |
| * display names. {@code ID} values are unique in the system |
| * table but may not be for dynamically created zones. |
| * @serial |
| */ |
| private String ID; |
| private static volatile TimeZone defaultTimeZone; |
| } |
