1023 lines
37 KiB
Java
1023 lines
37 KiB
Java
/*
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* Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.lang.ref.SoftReference;
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import java.time.ZoneOffset;
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import java.time.LocalDateTime;
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import java.util.Arrays;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.SimpleTimeZone;
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import java.util.TimeZone;
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import sun.util.calendar.CalendarSystem;
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import sun.util.calendar.CalendarDate;
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/**
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* <code>ZoneInfoOld</code> is an implementation subclass of {@link
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* java.util.TimeZone TimeZone} that represents GMT offsets and
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* daylight saving time transitions of a time zone.
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* <p>
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* The daylight saving time transitions are described in the {@link
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* #transitions transitions} table consisting of a chronological
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* sequence of transitions of GMT offset and/or daylight saving time
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* changes. Since all transitions are represented in UTC, in theory,
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* <code>ZoneInfoOld</code> can be used with any calendar systems except
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* for the {@link #getOffset(int,int,int,int,int,int) getOffset}
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* method that takes Gregorian calendar date fields.
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* <p>
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* This table covers transitions from 1900 until 2100 (as of version
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* 23), Before 1900, it assumes that there was no daylight saving
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* time and the <code>getOffset</code> methods always return the
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* {@link #getRawOffset} value. No Local Mean Time is supported. If a
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* specified date is beyond the transition table and this time zone is
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* supposed to observe daylight saving time in 2100, it delegates
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* operations to a {@link java.util.SimpleTimeZone SimpleTimeZone}
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* object created using the daylight saving time schedule as of 2100.
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* <p>
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* The date items, transitions, GMT offset(s), etc. are read from a database
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* file. See {@link ZoneInfoFile} for details.
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* @see java.util.SimpleTimeZone
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* @since 1.4
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*/
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public class ZoneInfoOld extends TimeZone {
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// The constants assume no leap seconds support.
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static final int SECOND_IN_MILLIS = 1000;
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static final int MINUTE_IN_MILLIS = SECOND_IN_MILLIS * 60;
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static final int HOUR_IN_MILLIS = MINUTE_IN_MILLIS * 60;
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static final int DAY_IN_MILLIS = HOUR_IN_MILLIS * 24;
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private static final int UTC_TIME = 0;
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private static final int STANDARD_TIME = 1;
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private static final int WALL_TIME = 2;
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private static final long OFFSET_MASK = 0x0fL;
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private static final long DST_MASK = 0xf0L;
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private static final int DST_NSHIFT = 4;
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// this bit field is reserved for abbreviation support
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private static final long ABBR_MASK = 0xf00L;
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private static final int TRANSITION_NSHIFT = 12;
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// IDs having conflicting data between Olson and JDK 1.1
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static final Map<String, String> conflictingIDs = Map.of(
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"EST", "America/Panama",
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"MST", "America/Phoenix");
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private static final CalendarSystem gcal = CalendarSystem.getGregorianCalendar();
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/**
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* The raw GMT offset in milliseconds between this zone and GMT.
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* Negative offsets are to the west of Greenwich. To obtain local
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* <em>standard</em> time, add the offset to GMT time.
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* @serial
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*/
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int rawOffset;
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/**
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* Difference in milliseconds from the original GMT offset in case
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* the raw offset value has been modified by calling {@link
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* #setRawOffset}. The initial value is 0.
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* @serial
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*/
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int rawOffsetDiff = 0;
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/**
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* A CRC32 value of all pairs of transition time (in milliseconds
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* in <code>long</code>) in local time and its GMT offset (in
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* seconds in <code>int</code>) in the chronological order. Byte
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* values of each <code>long</code> and <code>int</code> are taken
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* in the big endian order (i.e., MSB to LSB).
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* @serial
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*/
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int checksum;
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/**
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* The amount of time in milliseconds saved during daylight saving
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* time. If <code>useDaylight</code> is false, this value is 0.
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* @serial
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*/
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int dstSavings;
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/**
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* This array describes transitions of GMT offsets of this time
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* zone, including both raw offset changes and daylight saving
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* time changes.
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* A long integer consists of four bit fields.
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* <ul>
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* <li>The most significant 52-bit field represents transition
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* time in milliseconds from Gregorian January 1 1970, 00:00:00
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* GMT.</li>
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* <li>The next 4-bit field is reserved and must be 0.</li>
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* <li>The next 4-bit field is an index value to {@link #offsets
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* offsets[]} for the amount of daylight saving at the
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* transition. If this value is zero, it means that no daylight
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* saving, not the index value zero.</li>
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* <li>The least significant 4-bit field is an index value to
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* {@link #offsets offsets[]} for <em>total</em> GMT offset at the
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* transition.</li>
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* </ul>
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* If this time zone doesn't observe daylight saving time and has
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* never changed any GMT offsets in the past, this value is null.
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* @serial
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*/
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long[] transitions;
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/**
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* This array holds all unique offset values in
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* milliseconds. Index values to this array are stored in the
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* transitions array elements.
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* @serial
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*/
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int[] offsets;
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/**
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* SimpleTimeZone parameter values. It has to have either 8 for
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* {@link java.util.SimpleTimeZone#SimpleTimeZone(int, String,
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* int, int , int , int , int , int , int , int , int) the
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* 11-argument SimpleTimeZone constructor} or 10 for {@link
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* java.util.SimpleTimeZone#SimpleTimeZone(int, String, int, int,
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* int , int , int , int , int , int , int, int, int) the
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* 13-argument SimpleTimeZone constructor} parameters.
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* @serial
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*/
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int[] simpleTimeZoneParams;
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/**
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* True if the raw GMT offset value would change after the time
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* zone data has been generated; false, otherwise. The default
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* value is false.
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* @serial
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*/
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boolean willGMTOffsetChange = false;
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/**
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* True if the object has been modified after its instantiation.
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*/
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transient private boolean dirty = false;
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private static final long serialVersionUID = 2653134537216586139L;
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/**
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* A constructor.
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*/
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public ZoneInfoOld() {
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}
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/**
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* A Constructor for CustomID.
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*/
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public ZoneInfoOld(String ID, int rawOffset) {
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this(ID, rawOffset, 0, 0, null, null, null, false);
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}
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/**
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* Constructs a ZoneInfoOld instance.
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*
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* @param ID time zone name
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* @param rawOffset GMT offset in milliseconds
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* @param dstSavings daylight saving value in milliseconds or 0
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* (zero) if this time zone doesn't observe Daylight Saving Time.
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* @param checksum CRC32 value with all transitions table entry
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* values
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* @param transitions transition table
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* @param offsets offset value table
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* @param simpleTimeZoneParams parameter values for constructing
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* SimpleTimeZone
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* @param willGMTOffsetChange the value of willGMTOffsetChange
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*/
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ZoneInfoOld(String ID,
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int rawOffset,
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int dstSavings,
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int checksum,
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long[] transitions,
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int[] offsets,
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int[] simpleTimeZoneParams,
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boolean willGMTOffsetChange) {
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setID(ID);
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this.rawOffset = rawOffset;
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this.dstSavings = dstSavings;
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this.checksum = checksum;
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this.transitions = transitions;
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this.offsets = offsets;
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this.simpleTimeZoneParams = simpleTimeZoneParams;
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this.willGMTOffsetChange = willGMTOffsetChange;
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}
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/**
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* Returns the difference in milliseconds between local time and UTC
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* of given time, taking into account both the raw offset and the
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* effect of daylight savings.
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*
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* @param date the milliseconds in UTC
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* @return the milliseconds to add to UTC to get local wall time
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*/
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public int getOffset(long date) {
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return getOffsets(date, null, UTC_TIME);
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}
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public int getOffsets(long utc, int[] offsets) {
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return getOffsets(utc, offsets, UTC_TIME);
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}
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public int getOffsetsByStandard(long standard, int[] offsets) {
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return getOffsets(standard, offsets, STANDARD_TIME);
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}
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public int getOffsetsByWall(long wall, int[] offsets) {
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return getOffsets(wall, offsets, WALL_TIME);
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}
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private int getOffsets(long date, int[] offsets, int type) {
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// if dst is never observed, there is no transition.
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if (transitions == null) {
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int offset = getLastRawOffset();
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if (offsets != null) {
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offsets[0] = offset;
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offsets[1] = 0;
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}
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return offset;
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}
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date -= rawOffsetDiff;
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int index = getTransitionIndex(date, type);
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// prior to the transition table, returns the raw offset.
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// FIXME: should support LMT.
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if (index < 0) {
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int offset = getLastRawOffset();
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if (offsets != null) {
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offsets[0] = offset;
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offsets[1] = 0;
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}
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return offset;
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}
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if (index < transitions.length) {
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long val = transitions[index];
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int offset = this.offsets[(int)(val & OFFSET_MASK)] + rawOffsetDiff;
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if (offsets != null) {
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int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
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int save = (dst == 0) ? 0 : this.offsets[dst];
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offsets[0] = offset - save;
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offsets[1] = save;
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}
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return offset;
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}
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// beyond the transitions, delegate to SimpleTimeZone if there
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// is a rule; otherwise, return rawOffset.
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SimpleTimeZone tz = getLastRule();
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if (tz != null) {
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int rawoffset = tz.getRawOffset();
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long msec = date;
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if (type != UTC_TIME) {
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msec -= rawOffset;
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}
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int dstoffset = tz.getOffset(msec) - rawOffset;
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// Check if it's in a standard-to-daylight transition.
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if (dstoffset > 0 && tz.getOffset(msec - dstoffset) == rawoffset) {
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dstoffset = 0;
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}
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if (offsets != null) {
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offsets[0] = rawoffset;
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offsets[1] = dstoffset;
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}
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return rawoffset + dstoffset;
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}
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int offset = getLastRawOffset();
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if (offsets != null) {
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offsets[0] = offset;
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offsets[1] = 0;
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}
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return offset;
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}
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private int getTransitionIndex(long date, int type) {
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int low = 0;
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int high = transitions.length - 1;
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while (low <= high) {
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int mid = (low + high) / 2;
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long val = transitions[mid];
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long midVal = val >> TRANSITION_NSHIFT; // sign extended
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if (type != UTC_TIME) {
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midVal += offsets[(int)(val & OFFSET_MASK)]; // wall time
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}
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if (type == STANDARD_TIME) {
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int dstIndex = (int)((val >>> DST_NSHIFT) & 0xfL);
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if (dstIndex != 0) {
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midVal -= offsets[dstIndex]; // make it standard time
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}
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}
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if (midVal < date) {
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low = mid + 1;
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} else if (midVal > date) {
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high = mid - 1;
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} else {
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return mid;
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}
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}
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// if beyond the transitions, returns that index.
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if (low >= transitions.length) {
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return low;
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}
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return low - 1;
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}
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/**
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* Returns the difference in milliseconds between local time and
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* UTC, taking into account both the raw offset and the effect of
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* daylight savings, for the specified date and time. This method
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* assumes that the start and end month are distinct. This method
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* assumes a Gregorian calendar for calculations.
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* <p>
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* <em>Note: In general, clients should use
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* {@link Calendar#ZONE_OFFSET Calendar.get(ZONE_OFFSET)} +
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* {@link Calendar#DST_OFFSET Calendar.get(DST_OFFSET)}
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* instead of calling this method.</em>
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*
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* @param era The era of the given date. The value must be either
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* GregorianCalendar.AD or GregorianCalendar.BC.
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* @param year The year in the given date.
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* @param month The month in the given date. Month is 0-based. e.g.,
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* 0 for January.
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* @param day The day-in-month of the given date.
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* @param dayOfWeek The day-of-week of the given date.
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* @param millis The milliseconds in day in <em>standard</em> local time.
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* @return The milliseconds to add to UTC to get local time.
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*/
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public int getOffset(int era, int year, int month, int day,
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int dayOfWeek, int milliseconds) {
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if (milliseconds < 0 || milliseconds >= DAY_IN_MILLIS) {
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throw new IllegalArgumentException();
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}
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if (era == java.util.GregorianCalendar.BC) { // BC
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year = 1 - year;
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} else if (era != java.util.GregorianCalendar.AD) {
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throw new IllegalArgumentException();
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}
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CalendarDate date = gcal.newCalendarDate(null);
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date.setDate(year, month + 1, day);
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if (gcal.validate(date) == false) {
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throw new IllegalArgumentException();
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}
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// bug-for-bug compatible argument checking
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if (dayOfWeek < java.util.GregorianCalendar.SUNDAY
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|| dayOfWeek > java.util.GregorianCalendar.SATURDAY) {
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throw new IllegalArgumentException();
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}
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if (transitions == null) {
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return getLastRawOffset();
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}
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long dateInMillis = gcal.getTime(date) + milliseconds;
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dateInMillis -= (long) rawOffset; // make it UTC
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return getOffsets(dateInMillis, null, UTC_TIME);
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}
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/**
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* Sets the base time zone offset from GMT. This operation
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* modifies all the transitions of this ZoneInfoOld object, including
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* historical ones, if applicable.
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*
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* @param offsetMillis the base time zone offset to GMT.
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* @see getRawOffset
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*/
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public synchronized void setRawOffset(int offsetMillis) {
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if (offsetMillis == rawOffset + rawOffsetDiff) {
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return;
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}
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rawOffsetDiff = offsetMillis - rawOffset;
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if (lastRule != null) {
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lastRule.setRawOffset(offsetMillis);
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}
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dirty = true;
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}
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/**
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* Returns the GMT offset of the current date. This GMT offset
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* value is not modified during Daylight Saving Time.
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*
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* @return the GMT offset value in milliseconds to add to UTC time
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* to get local standard time
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*/
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public int getRawOffset() {
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if (!willGMTOffsetChange) {
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return rawOffset + rawOffsetDiff;
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}
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int[] offsets = new int[2];
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getOffsets(System.currentTimeMillis(), offsets, UTC_TIME);
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return offsets[0];
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}
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public boolean isDirty() {
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return dirty;
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}
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int getLastRawOffset() {
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return rawOffset + rawOffsetDiff;
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}
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/**
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* Queries if this time zone uses Daylight Saving Time in the last known rule.
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*/
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public boolean useDaylightTime() {
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return (simpleTimeZoneParams != null);
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}
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@Override
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public boolean observesDaylightTime() {
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if (simpleTimeZoneParams != null) {
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return true;
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}
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if (transitions == null) {
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return false;
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}
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// Look up the transition table to see if it's in DST right
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// now or if there's any standard-to-daylight transition at
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// any future.
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long utc = System.currentTimeMillis() - rawOffsetDiff;
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int index = getTransitionIndex(utc, UTC_TIME);
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// before transitions in the transition table
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if (index < 0) {
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return false;
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}
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// the time is in the table range.
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for (int i = index; i < transitions.length; i++) {
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if ((transitions[i] & DST_MASK) != 0) {
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return true;
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}
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}
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// No further DST is observed.
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return false;
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}
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|
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/**
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* Queries if the specified date is in Daylight Saving Time.
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*/
|
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public boolean inDaylightTime(Date date) {
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if (date == null) {
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throw new NullPointerException();
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}
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if (transitions == null) {
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return false;
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}
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long utc = date.getTime() - rawOffsetDiff;
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int index = getTransitionIndex(utc, UTC_TIME);
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// before transitions in the transition table
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if (index < 0) {
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return false;
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}
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// the time is in the table range.
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if (index < transitions.length) {
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return (transitions[index] & DST_MASK) != 0;
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}
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// beyond the transition table
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SimpleTimeZone tz = getLastRule();
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if (tz != null) {
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return tz.inDaylightTime(date);
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}
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return false;
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}
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|
|
|
/**
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* Returns the amount of time in milliseconds that the clock is advanced
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|
* during daylight saving time is in effect in its last daylight saving time rule.
|
|
*
|
|
* @return the number of milliseconds the time is advanced with respect to
|
|
* standard time when daylight saving time is in effect.
|
|
*/
|
|
public int getDSTSavings() {
|
|
return dstSavings;
|
|
}
|
|
|
|
// /**
|
|
// * @return the last year in the transition table or -1 if this
|
|
// * time zone doesn't observe any daylight saving time.
|
|
// */
|
|
// public int getMaxTransitionYear() {
|
|
// if (transitions == null) {
|
|
// return -1;
|
|
// }
|
|
// long val = transitions[transitions.length - 1];
|
|
// int offset = this.offsets[(int)(val & OFFSET_MASK)] + rawOffsetDiff;
|
|
// val = (val >> TRANSITION_NSHIFT) + offset;
|
|
// CalendarDate lastDate = Gregorian.getCalendarDate(val);
|
|
// return lastDate.getYear();
|
|
// }
|
|
|
|
/**
|
|
* Returns a string representation of this time zone.
|
|
* @return the string
|
|
*/
|
|
public String toString() {
|
|
return getClass().getName() +
|
|
"[id=\"" + getID() + "\"" +
|
|
",offset=" + getLastRawOffset() +
|
|
",dstSavings=" + dstSavings +
|
|
",useDaylight=" + useDaylightTime() +
|
|
",transitions=" + ((transitions != null) ? transitions.length : 0) +
|
|
",lastRule=" + (lastRule == null ? getLastRuleInstance() : lastRule) +
|
|
"]";
|
|
}
|
|
|
|
/**
|
|
* Gets all available IDs supported in the Java run-time.
|
|
*
|
|
* @return an array of time zone IDs.
|
|
*/
|
|
public static String[] getAvailableIDs() {
|
|
List<String> idList = ZoneInfoFile.getZoneIDs();
|
|
List<String> excluded = ZoneInfoFile.getExcludedZones();
|
|
if (excluded != null) {
|
|
// List all zones from the idList and excluded lists
|
|
List<String> list = new ArrayList<>(idList.size() + excluded.size());
|
|
list.addAll(idList);
|
|
list.addAll(excluded);
|
|
idList = list;
|
|
}
|
|
String[] ids = new String[idList.size()];
|
|
return idList.toArray(ids);
|
|
}
|
|
|
|
/**
|
|
* Gets all available IDs that have the same value as the
|
|
* specified raw GMT offset.
|
|
*
|
|
* @param rawOffset the GMT offset in milliseconds. This
|
|
* value should not include any daylight saving time.
|
|
*
|
|
* @return an array of time zone IDs.
|
|
*/
|
|
public static String[] getAvailableIDs(int rawOffset) {
|
|
String[] result;
|
|
List<String> matched = new ArrayList<>();
|
|
List<String> IDs = ZoneInfoFile.getZoneIDs();
|
|
int[] rawOffsets = ZoneInfoFile.getRawOffsets();
|
|
|
|
loop:
|
|
for (int index = 0; index < rawOffsets.length; index++) {
|
|
if (rawOffsets[index] == rawOffset) {
|
|
byte[] indices = ZoneInfoFile.getRawOffsetIndices();
|
|
for (int i = 0; i < indices.length; i++) {
|
|
if (indices[i] == index) {
|
|
matched.add(IDs.get(i++));
|
|
while (i < indices.length && indices[i] == index) {
|
|
matched.add(IDs.get(i++));
|
|
}
|
|
break loop;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// We need to add any zones from the excluded zone list that
|
|
// currently have the same GMT offset as the specified
|
|
// rawOffset. The zones returned by this method may not be
|
|
// correct as of return to the caller if any GMT offset
|
|
// transition is happening during this GMT offset checking...
|
|
List<String> excluded = ZoneInfoFile.getExcludedZones();
|
|
if (excluded != null) {
|
|
for (String id : excluded) {
|
|
TimeZone zi = getTimeZone(id);
|
|
if (zi != null && zi.getRawOffset() == rawOffset) {
|
|
matched.add(id);
|
|
}
|
|
}
|
|
}
|
|
|
|
result = new String[matched.size()];
|
|
matched.toArray(result);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the ZoneInfoOld for the given ID.
|
|
*
|
|
* @param ID the ID for a ZoneInfoOld. See TimeZone for detail.
|
|
*
|
|
* @return the specified ZoneInfoOld object, or null if there is no
|
|
* time zone of the ID.
|
|
*/
|
|
public static TimeZone getTimeZone(String ID) {
|
|
String givenID = null;
|
|
|
|
ZoneInfoOld zi = ZoneInfoFile.getZoneInfoOld(ID);
|
|
if (zi == null) {
|
|
// if we can't create an object for the ID, try aliases.
|
|
try {
|
|
Map<String, String> map = getAliasTable();
|
|
String alias = ID;
|
|
while ((alias = map.get(alias)) != null) {
|
|
zi = ZoneInfoFile.getZoneInfoOld(alias);
|
|
if (zi != null) {
|
|
zi.setID(ID);
|
|
zi = ZoneInfoFile.addToCache(ID, zi);
|
|
zi = (ZoneInfoOld) zi.clone();
|
|
break;
|
|
}
|
|
}
|
|
} catch (Exception e) {
|
|
// ignore exceptions
|
|
}
|
|
}
|
|
|
|
if (givenID != null && zi != null) {
|
|
zi.setID(givenID);
|
|
}
|
|
return zi;
|
|
}
|
|
|
|
private transient SimpleTimeZone lastRule;
|
|
|
|
/**
|
|
* Returns a SimpleTimeZone object representing the last GMT
|
|
* offset and DST schedule or null if this time zone doesn't
|
|
* observe DST.
|
|
*/
|
|
synchronized SimpleTimeZone getLastRule() {
|
|
if (lastRule == null) {
|
|
lastRule = getLastRuleInstance();
|
|
}
|
|
return lastRule;
|
|
}
|
|
|
|
/**
|
|
* Returns a SimpleTimeZone object that represents the last
|
|
* known daylight saving time rules.
|
|
*
|
|
* @return a SimpleTimeZone object or null if this time zone
|
|
* doesn't observe DST.
|
|
*/
|
|
public SimpleTimeZone getLastRuleInstance() {
|
|
if (simpleTimeZoneParams == null) {
|
|
return null;
|
|
}
|
|
if (simpleTimeZoneParams.length == 10) {
|
|
return new SimpleTimeZone(getLastRawOffset(), getID(),
|
|
simpleTimeZoneParams[0],
|
|
simpleTimeZoneParams[1],
|
|
simpleTimeZoneParams[2],
|
|
simpleTimeZoneParams[3],
|
|
simpleTimeZoneParams[4],
|
|
simpleTimeZoneParams[5],
|
|
simpleTimeZoneParams[6],
|
|
simpleTimeZoneParams[7],
|
|
simpleTimeZoneParams[8],
|
|
simpleTimeZoneParams[9],
|
|
dstSavings);
|
|
}
|
|
return new SimpleTimeZone(getLastRawOffset(), getID(),
|
|
simpleTimeZoneParams[0],
|
|
simpleTimeZoneParams[1],
|
|
simpleTimeZoneParams[2],
|
|
simpleTimeZoneParams[3],
|
|
simpleTimeZoneParams[4],
|
|
simpleTimeZoneParams[5],
|
|
simpleTimeZoneParams[6],
|
|
simpleTimeZoneParams[7],
|
|
dstSavings);
|
|
}
|
|
|
|
/**
|
|
* Returns a copy of this <code>ZoneInfoOld</code>.
|
|
*/
|
|
public Object clone() {
|
|
ZoneInfoOld zi = (ZoneInfoOld) super.clone();
|
|
zi.lastRule = null;
|
|
return zi;
|
|
}
|
|
|
|
/**
|
|
* Returns a hash code value calculated from the GMT offset and
|
|
* transitions.
|
|
* @return a hash code of this time zone
|
|
*/
|
|
public int hashCode() {
|
|
return getLastRawOffset() ^ checksum;
|
|
}
|
|
|
|
/**
|
|
* Compares the equity of two ZoneInfoOld objects.
|
|
*
|
|
* @param obj the object to be compared with
|
|
* @return true if given object is same as this ZoneInfoOld object,
|
|
* false otherwise.
|
|
*/
|
|
public boolean equals(Object obj) {
|
|
if (this == obj) {
|
|
return true;
|
|
}
|
|
if (!(obj instanceof ZoneInfoOld)) {
|
|
return false;
|
|
}
|
|
ZoneInfoOld that = (ZoneInfoOld) obj;
|
|
return (getID().equals(that.getID())
|
|
&& (getLastRawOffset() == that.getLastRawOffset())
|
|
&& (checksum == that.checksum));
|
|
}
|
|
|
|
/**
|
|
* Returns true if this zone has the same raw GMT offset value and
|
|
* transition table as another zone info. If the specified
|
|
* TimeZone object is not a ZoneInfoOld instance, this method returns
|
|
* true if the specified TimeZone object has the same raw GMT
|
|
* offset value with no daylight saving time.
|
|
*
|
|
* @param other the ZoneInfoOld object to be compared with
|
|
* @return true if the given <code>TimeZone</code> has the same
|
|
* GMT offset and transition information; false, otherwise.
|
|
*/
|
|
public boolean hasSameRules(TimeZone other) {
|
|
if (this == other) {
|
|
return true;
|
|
}
|
|
if (other == null) {
|
|
return false;
|
|
}
|
|
if (!(other instanceof ZoneInfoOld)) {
|
|
if (getRawOffset() != other.getRawOffset()) {
|
|
return false;
|
|
}
|
|
// if both have the same raw offset and neither observes
|
|
// DST, they have the same rule.
|
|
if ((transitions == null)
|
|
&& (useDaylightTime() == false)
|
|
&& (other.useDaylightTime() == false)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
if (getLastRawOffset() != ((ZoneInfoOld)other).getLastRawOffset()) {
|
|
return false;
|
|
}
|
|
return (checksum == ((ZoneInfoOld)other).checksum);
|
|
}
|
|
|
|
private static SoftReference<Map<String, String>> aliasTable;
|
|
|
|
static Map<String, String> getCachedAliasTable() {
|
|
Map<String, String> aliases = null;
|
|
|
|
SoftReference<Map<String, String>> cache = aliasTable;
|
|
if (cache != null) {
|
|
aliases = cache.get();
|
|
}
|
|
return aliases;
|
|
}
|
|
|
|
/**
|
|
* Returns a Map from alias time zone IDs to their standard
|
|
* time zone IDs.
|
|
*
|
|
* @return the Map that holds the mappings from alias time zone IDs
|
|
* to their standard time zone IDs, or null if
|
|
* <code>ZoneInfoOldMappings</code> file is not available.
|
|
*/
|
|
public synchronized static Map<String, String> getAliasTable() {
|
|
Map<String, String> aliases = getCachedAliasTable();
|
|
if (aliases == null) {
|
|
aliases = ZoneInfoFile.getZoneAliases();
|
|
if (aliases != null) {
|
|
// Replace old mappings from `jdk11_backward`
|
|
aliases.putAll(conflictingIDs);
|
|
aliasTable = new SoftReference<Map<String, String>>(aliases);
|
|
}
|
|
}
|
|
return aliases;
|
|
}
|
|
|
|
private void readObject(ObjectInputStream stream)
|
|
throws IOException, ClassNotFoundException {
|
|
stream.defaultReadObject();
|
|
// We don't know how this object from 1.4.x or earlier has
|
|
// been mutated. So it should always be marked as `dirty'.
|
|
dirty = true;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////
|
|
public boolean equalsTo(ZoneInfoOld other) {
|
|
return (getID().equals(other.getID())
|
|
&& (getLastRawOffset() == other.getLastRawOffset())
|
|
&& (dstSavings == other.dstSavings)
|
|
&& (willGMTOffsetChange == other.willGMTOffsetChange)
|
|
&& (checksum == other.checksum)
|
|
&& equalsTransOffsets(other)
|
|
&& (Arrays.equals(simpleTimeZoneParams, other.simpleTimeZoneParams) ||
|
|
getLastRule().equals(other.getLastRule())));
|
|
}
|
|
|
|
private boolean equalsTransOffsets(ZoneInfoOld other) {
|
|
if (transitions == null) {
|
|
return (other.transitions == null &&
|
|
Arrays.equals(offsets, other.offsets));
|
|
}
|
|
if (other.transitions == null ||
|
|
transitions.length != other.transitions.length) {
|
|
return false;
|
|
}
|
|
// if offsets and other.offsets have different order
|
|
// the last 4-bit in trans are different.
|
|
for (int i = 0; i < transitions.length; i++) {
|
|
long val = transitions[i];
|
|
int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
|
|
int save = (dst == 0) ? 0 : offsets[dst] / 1000;
|
|
int off = offsets[(int)(val & OFFSET_MASK)]/1000;
|
|
long second = (val >> TRANSITION_NSHIFT)/1000;
|
|
|
|
val = other.transitions[i];
|
|
int dstO = (int)((val >>> DST_NSHIFT) & 0xfL);
|
|
int saveO = (dstO == 0) ? 0 : other.offsets[dstO] / 1000;
|
|
int offO = other.offsets[(int)(val & OFFSET_MASK)]/1000;
|
|
long secondO = (val >> TRANSITION_NSHIFT)/1000;
|
|
if ((dst == 0) != (dstO == 0) || save != saveO || off != offO || second != secondO)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private int transToString(long val, int off_old, int[] offsets, StringBuilder sb) {
|
|
int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
|
|
int save = (dst == 0) ? 0 : offsets[dst] / 1000;
|
|
int off = offsets[(int)(val & OFFSET_MASK)]/1000;
|
|
long second = (val >> TRANSITION_NSHIFT)/1000;
|
|
ZoneOffset offset_old = ZoneOffset.ofTotalSeconds(off_old);
|
|
ZoneOffset offset = ZoneOffset.ofTotalSeconds(off);
|
|
sb.append(" " + LocalDateTime.ofEpochSecond(second, 0, offset_old));
|
|
|
|
sb.append(" [utc=" + second +
|
|
" raw=" + Long.toHexString(val >> TRANSITION_NSHIFT) +
|
|
", offset=" + off + "/" + offset + ", saving=" + save + "]");
|
|
return off;
|
|
}
|
|
|
|
public String diffsTo(ZoneInfoOld other) {
|
|
|
|
int rawOffset0 = other.rawOffset;
|
|
int checksum0 = other.checksum;
|
|
int dstSavings0 = other.dstSavings;
|
|
long[] transitions0 = other.transitions;
|
|
int[] offsets0 = other.offsets;
|
|
int[] simpleTimeZoneParams0 = other.simpleTimeZoneParams;
|
|
boolean willGMTOffsetChange0 = other.willGMTOffsetChange;
|
|
|
|
|
|
//return getClass().getName() +
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append("******************************\n" +
|
|
getID() + " : " + other.getID());
|
|
// ROC is excluded by ZoneInfoOld
|
|
if ("ROC".equals(getID())) {
|
|
return sb.toString();
|
|
}
|
|
if (rawOffset != rawOffset0 ||
|
|
dstSavings != dstSavings0 ||
|
|
checksum != checksum0 ||
|
|
willGMTOffsetChange != willGMTOffsetChange0 ||
|
|
(simpleTimeZoneParams != null ) != (simpleTimeZoneParams0 != null) ||
|
|
(transitions != null && transitions0 != null &&
|
|
transitions.length != transitions0.length))
|
|
{
|
|
sb.append("\n offset=" + getLastRawOffset() +
|
|
",dstSavings=" + dstSavings +
|
|
",useDaylight=" + useDaylightTime() +
|
|
",transitions=" + ((transitions != null) ? transitions.length : 0) +
|
|
",offsets=" + ((offsets != null) ? offsets.length : 0) +
|
|
",checksum=" + checksum +
|
|
",gmtChanged=" + willGMTOffsetChange)
|
|
.append("\n[NG]offset=" + rawOffset0 +
|
|
",dstSavings=" + dstSavings0 +
|
|
",useDaylight=" + (simpleTimeZoneParams != null) +
|
|
",transitions=" + ((transitions0 != null) ? transitions0.length : 0) +
|
|
",offsets=" + ((offsets0 != null) ? offsets0.length : 0) +
|
|
",checksum=" + checksum0 +
|
|
",gmtChanged=" + willGMTOffsetChange0 +
|
|
"");
|
|
}
|
|
// offsets
|
|
if (!Arrays.equals(offsets, offsets0)) {
|
|
sb.append("\n offset.len=" + ((offsets != null)? offsets.length : "null") +
|
|
" " + ((offsets0 != null)? offsets0.length : "null"));
|
|
if (offsets != null && offsets0.length != 0) {
|
|
int len = Math.min(offsets.length, offsets0.length);
|
|
int i = 0;
|
|
for (i = 0; i < len; i++) {
|
|
sb.append("\n " +
|
|
ZoneOffset.ofTotalSeconds(offsets[i]/1000) + " " +
|
|
ZoneOffset.ofTotalSeconds(offsets0[i]/1000));
|
|
}
|
|
for (; i < offsets0.length; i++) {
|
|
sb.append("\n " + ZoneOffset.ofTotalSeconds(offsets0[i]/1000));
|
|
}
|
|
}
|
|
}
|
|
// trans
|
|
int offset = 0;
|
|
int offset0 = 0;
|
|
if (!equalsTransOffsets(other)) {
|
|
sb.append("\n -------------");
|
|
if ((transitions == null) != (transitions0 == null)) {
|
|
sb.append("\n (NG) Different trans(null) :" +
|
|
transitions + ", " + transitions0);
|
|
if (transitions != null) {
|
|
for (int i = 0; i < transitions.length; i++) {
|
|
sb.append("\n (NG)");
|
|
offset = transToString(transitions[i], offset, offsets, sb);
|
|
}
|
|
}
|
|
} else {
|
|
if (transitions.length != transitions0.length) {
|
|
sb.append("\n (NG) Different trans size :" +
|
|
transitions.length + ", " + transitions0.length);
|
|
}
|
|
int length = Math.min(transitions.length, transitions0.length);
|
|
for (int i = 0; i < length; i++) {
|
|
// sb.append("\n[" + i + "] ");
|
|
// offset = transToString(transitions[i], offset, offsets, sb);
|
|
long val = transitions[i];
|
|
int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
|
|
int save = (dst == 0) ? 0 : offsets[dst] / 1000;
|
|
int off = offsets[(int)(val & OFFSET_MASK)]/1000;
|
|
long second = (val >> TRANSITION_NSHIFT)/1000;
|
|
sb.append("\n ");
|
|
offset = transToString(transitions[i], offset, offsets, sb);
|
|
if (transitions0 == null || i >= transitions0.length) {
|
|
sb.append("\n ");
|
|
offset = transToString(transitions[i], offset, offsets, sb);
|
|
sb.append("\n (NG) trans0 is null or < trans.length");
|
|
} else {
|
|
long val0 = transitions0[i];
|
|
int dst0 = (int)((val0 >>> DST_NSHIFT) & 0xfL);
|
|
int save0 = (dst0 == 0) ? 0 : offsets0[dst0] / 1000;
|
|
int off0 = offsets0[(int)(val0 & OFFSET_MASK)]/1000;
|
|
long second0 = (val0 >> TRANSITION_NSHIFT)/1000;
|
|
if (save != save0 || off != off0 || second != second0) {
|
|
sb.append("\n (NG)");
|
|
} else {
|
|
sb.append("\n (OK)");
|
|
}
|
|
offset0 = transToString(transitions0[i], offset0, offsets0, sb);
|
|
sb.append("\n -----");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
SimpleTimeZone stz = getLastRuleInstance();
|
|
if (stz != null) {
|
|
SimpleTimeZone stz0 = other.getLastRule();
|
|
if (!stz.hasSameRules(stz0)) {
|
|
sb.append("\n -------------")
|
|
.append("\n SimpleTimeZone (NG)")
|
|
.append("\n stz=" + stz)
|
|
.append("\n stz0=" + stz0);
|
|
}
|
|
}
|
|
sb.append("\n -------------");
|
|
return sb.toString();
|
|
}
|
|
}
|