1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/compact/src/main/java/java/util/SimpleTimeZone.java Thu Oct 03 15:40:35 2013 +0200
1.3 @@ -0,0 +1,1706 @@
1.4 +/*
1.5 + * Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +/*
1.30 + * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
1.31 + * (C) Copyright IBM Corp. 1996 - All Rights Reserved
1.32 + *
1.33 + * The original version of this source code and documentation is copyrighted
1.34 + * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
1.35 + * materials are provided under terms of a License Agreement between Taligent
1.36 + * and Sun. This technology is protected by multiple US and International
1.37 + * patents. This notice and attribution to Taligent may not be removed.
1.38 + * Taligent is a registered trademark of Taligent, Inc.
1.39 + *
1.40 + */
1.41 +
1.42 +package java.util;
1.43 +
1.44 +import java.io.ObjectInputStream;
1.45 +import java.io.ObjectOutputStream;
1.46 +import java.io.IOException;
1.47 +import sun.util.calendar.CalendarSystem;
1.48 +import sun.util.calendar.CalendarUtils;
1.49 +import sun.util.calendar.BaseCalendar;
1.50 +import sun.util.calendar.Gregorian;
1.51 +
1.52 +/**
1.53 + * <code>SimpleTimeZone</code> is a concrete subclass of <code>TimeZone</code>
1.54 + * that represents a time zone for use with a Gregorian calendar.
1.55 + * The class holds an offset from GMT, called <em>raw offset</em>, and start
1.56 + * and end rules for a daylight saving time schedule. Since it only holds
1.57 + * single values for each, it cannot handle historical changes in the offset
1.58 + * from GMT and the daylight saving schedule, except that the {@link
1.59 + * #setStartYear setStartYear} method can specify the year when the daylight
1.60 + * saving time schedule starts in effect.
1.61 + * <p>
1.62 + * To construct a <code>SimpleTimeZone</code> with a daylight saving time
1.63 + * schedule, the schedule can be described with a set of rules,
1.64 + * <em>start-rule</em> and <em>end-rule</em>. A day when daylight saving time
1.65 + * starts or ends is specified by a combination of <em>month</em>,
1.66 + * <em>day-of-month</em>, and <em>day-of-week</em> values. The <em>month</em>
1.67 + * value is represented by a Calendar {@link Calendar#MONTH MONTH} field
1.68 + * value, such as {@link Calendar#MARCH}. The <em>day-of-week</em> value is
1.69 + * represented by a Calendar {@link Calendar#DAY_OF_WEEK DAY_OF_WEEK} value,
1.70 + * such as {@link Calendar#SUNDAY SUNDAY}. The meanings of value combinations
1.71 + * are as follows.
1.72 + *
1.73 + * <ul>
1.74 + * <li><b>Exact day of month</b><br>
1.75 + * To specify an exact day of month, set the <em>month</em> and
1.76 + * <em>day-of-month</em> to an exact value, and <em>day-of-week</em> to zero. For
1.77 + * example, to specify March 1, set the <em>month</em> to {@link Calendar#MARCH
1.78 + * MARCH}, <em>day-of-month</em> to 1, and <em>day-of-week</em> to 0.</li>
1.79 + *
1.80 + * <li><b>Day of week on or after day of month</b><br>
1.81 + * To specify a day of week on or after an exact day of month, set the
1.82 + * <em>month</em> to an exact month value, <em>day-of-month</em> to the day on
1.83 + * or after which the rule is applied, and <em>day-of-week</em> to a negative {@link
1.84 + * Calendar#DAY_OF_WEEK DAY_OF_WEEK} field value. For example, to specify the
1.85 + * second Sunday of April, set <em>month</em> to {@link Calendar#APRIL APRIL},
1.86 + * <em>day-of-month</em> to 8, and <em>day-of-week</em> to <code>-</code>{@link
1.87 + * Calendar#SUNDAY SUNDAY}.</li>
1.88 + *
1.89 + * <li><b>Day of week on or before day of month</b><br>
1.90 + * To specify a day of the week on or before an exact day of the month, set
1.91 + * <em>day-of-month</em> and <em>day-of-week</em> to a negative value. For
1.92 + * example, to specify the last Wednesday on or before the 21st of March, set
1.93 + * <em>month</em> to {@link Calendar#MARCH MARCH}, <em>day-of-month</em> is -21
1.94 + * and <em>day-of-week</em> is <code>-</code>{@link Calendar#WEDNESDAY WEDNESDAY}. </li>
1.95 + *
1.96 + * <li><b>Last day-of-week of month</b><br>
1.97 + * To specify, the last day-of-week of the month, set <em>day-of-week</em> to a
1.98 + * {@link Calendar#DAY_OF_WEEK DAY_OF_WEEK} value and <em>day-of-month</em> to
1.99 + * -1. For example, to specify the last Sunday of October, set <em>month</em>
1.100 + * to {@link Calendar#OCTOBER OCTOBER}, <em>day-of-week</em> to {@link
1.101 + * Calendar#SUNDAY SUNDAY} and <em>day-of-month</em> to -1. </li>
1.102 + *
1.103 + * </ul>
1.104 + * The time of the day at which daylight saving time starts or ends is
1.105 + * specified by a millisecond value within the day. There are three kinds of
1.106 + * <em>mode</em>s to specify the time: {@link #WALL_TIME}, {@link
1.107 + * #STANDARD_TIME} and {@link #UTC_TIME}. For example, if daylight
1.108 + * saving time ends
1.109 + * at 2:00 am in the wall clock time, it can be specified by 7200000
1.110 + * milliseconds in the {@link #WALL_TIME} mode. In this case, the wall clock time
1.111 + * for an <em>end-rule</em> means the same thing as the daylight time.
1.112 + * <p>
1.113 + * The following are examples of parameters for constructing time zone objects.
1.114 + * <pre><code>
1.115 + * // Base GMT offset: -8:00
1.116 + * // DST starts: at 2:00am in standard time
1.117 + * // on the first Sunday in April
1.118 + * // DST ends: at 2:00am in daylight time
1.119 + * // on the last Sunday in October
1.120 + * // Save: 1 hour
1.121 + * SimpleTimeZone(-28800000,
1.122 + * "America/Los_Angeles",
1.123 + * Calendar.APRIL, 1, -Calendar.SUNDAY,
1.124 + * 7200000,
1.125 + * Calendar.OCTOBER, -1, Calendar.SUNDAY,
1.126 + * 7200000,
1.127 + * 3600000)
1.128 + *
1.129 + * // Base GMT offset: +1:00
1.130 + * // DST starts: at 1:00am in UTC time
1.131 + * // on the last Sunday in March
1.132 + * // DST ends: at 1:00am in UTC time
1.133 + * // on the last Sunday in October
1.134 + * // Save: 1 hour
1.135 + * SimpleTimeZone(3600000,
1.136 + * "Europe/Paris",
1.137 + * Calendar.MARCH, -1, Calendar.SUNDAY,
1.138 + * 3600000, SimpleTimeZone.UTC_TIME,
1.139 + * Calendar.OCTOBER, -1, Calendar.SUNDAY,
1.140 + * 3600000, SimpleTimeZone.UTC_TIME,
1.141 + * 3600000)
1.142 + * </code></pre>
1.143 + * These parameter rules are also applicable to the set rule methods, such as
1.144 + * <code>setStartRule</code>.
1.145 + *
1.146 + * @since 1.1
1.147 + * @see Calendar
1.148 + * @see GregorianCalendar
1.149 + * @see TimeZone
1.150 + * @author David Goldsmith, Mark Davis, Chen-Lieh Huang, Alan Liu
1.151 + */
1.152 +
1.153 +public class SimpleTimeZone extends TimeZone {
1.154 + /**
1.155 + * Constructs a SimpleTimeZone with the given base time zone offset from GMT
1.156 + * and time zone ID with no daylight saving time schedule.
1.157 + *
1.158 + * @param rawOffset The base time zone offset in milliseconds to GMT.
1.159 + * @param ID The time zone name that is given to this instance.
1.160 + */
1.161 + public SimpleTimeZone(int rawOffset, String ID)
1.162 + {
1.163 + this.rawOffset = rawOffset;
1.164 + setID (ID);
1.165 + dstSavings = millisPerHour; // In case user sets rules later
1.166 + }
1.167 +
1.168 + /**
1.169 + * Constructs a SimpleTimeZone with the given base time zone offset from
1.170 + * GMT, time zone ID, and rules for starting and ending the daylight
1.171 + * time.
1.172 + * Both <code>startTime</code> and <code>endTime</code> are specified to be
1.173 + * represented in the wall clock time. The amount of daylight saving is
1.174 + * assumed to be 3600000 milliseconds (i.e., one hour). This constructor is
1.175 + * equivalent to:
1.176 + * <pre><code>
1.177 + * SimpleTimeZone(rawOffset,
1.178 + * ID,
1.179 + * startMonth,
1.180 + * startDay,
1.181 + * startDayOfWeek,
1.182 + * startTime,
1.183 + * SimpleTimeZone.{@link #WALL_TIME},
1.184 + * endMonth,
1.185 + * endDay,
1.186 + * endDayOfWeek,
1.187 + * endTime,
1.188 + * SimpleTimeZone.{@link #WALL_TIME},
1.189 + * 3600000)
1.190 + * </code></pre>
1.191 + *
1.192 + * @param rawOffset The given base time zone offset from GMT.
1.193 + * @param ID The time zone ID which is given to this object.
1.194 + * @param startMonth The daylight saving time starting month. Month is
1.195 + * a {@link Calendar#MONTH MONTH} field value (0-based. e.g., 0
1.196 + * for January).
1.197 + * @param startDay The day of the month on which the daylight saving time starts.
1.198 + * See the class description for the special cases of this parameter.
1.199 + * @param startDayOfWeek The daylight saving time starting day-of-week.
1.200 + * See the class description for the special cases of this parameter.
1.201 + * @param startTime The daylight saving time starting time in local wall clock
1.202 + * time (in milliseconds within the day), which is local
1.203 + * standard time in this case.
1.204 + * @param endMonth The daylight saving time ending month. Month is
1.205 + * a {@link Calendar#MONTH MONTH} field
1.206 + * value (0-based. e.g., 9 for October).
1.207 + * @param endDay The day of the month on which the daylight saving time ends.
1.208 + * See the class description for the special cases of this parameter.
1.209 + * @param endDayOfWeek The daylight saving time ending day-of-week.
1.210 + * See the class description for the special cases of this parameter.
1.211 + * @param endTime The daylight saving ending time in local wall clock time,
1.212 + * (in milliseconds within the day) which is local daylight
1.213 + * time in this case.
1.214 + * @exception IllegalArgumentException if the month, day, dayOfWeek, or time
1.215 + * parameters are out of range for the start or end rule
1.216 + */
1.217 + public SimpleTimeZone(int rawOffset, String ID,
1.218 + int startMonth, int startDay, int startDayOfWeek, int startTime,
1.219 + int endMonth, int endDay, int endDayOfWeek, int endTime)
1.220 + {
1.221 + this(rawOffset, ID,
1.222 + startMonth, startDay, startDayOfWeek, startTime, WALL_TIME,
1.223 + endMonth, endDay, endDayOfWeek, endTime, WALL_TIME,
1.224 + millisPerHour);
1.225 + }
1.226 +
1.227 + /**
1.228 + * Constructs a SimpleTimeZone with the given base time zone offset from
1.229 + * GMT, time zone ID, and rules for starting and ending the daylight
1.230 + * time.
1.231 + * Both <code>startTime</code> and <code>endTime</code> are assumed to be
1.232 + * represented in the wall clock time. This constructor is equivalent to:
1.233 + * <pre><code>
1.234 + * SimpleTimeZone(rawOffset,
1.235 + * ID,
1.236 + * startMonth,
1.237 + * startDay,
1.238 + * startDayOfWeek,
1.239 + * startTime,
1.240 + * SimpleTimeZone.{@link #WALL_TIME},
1.241 + * endMonth,
1.242 + * endDay,
1.243 + * endDayOfWeek,
1.244 + * endTime,
1.245 + * SimpleTimeZone.{@link #WALL_TIME},
1.246 + * dstSavings)
1.247 + * </code></pre>
1.248 + *
1.249 + * @param rawOffset The given base time zone offset from GMT.
1.250 + * @param ID The time zone ID which is given to this object.
1.251 + * @param startMonth The daylight saving time starting month. Month is
1.252 + * a {@link Calendar#MONTH MONTH} field
1.253 + * value (0-based. e.g., 0 for January).
1.254 + * @param startDay The day of the month on which the daylight saving time starts.
1.255 + * See the class description for the special cases of this parameter.
1.256 + * @param startDayOfWeek The daylight saving time starting day-of-week.
1.257 + * See the class description for the special cases of this parameter.
1.258 + * @param startTime The daylight saving time starting time in local wall clock
1.259 + * time, which is local standard time in this case.
1.260 + * @param endMonth The daylight saving time ending month. Month is
1.261 + * a {@link Calendar#MONTH MONTH} field
1.262 + * value (0-based. e.g., 9 for October).
1.263 + * @param endDay The day of the month on which the daylight saving time ends.
1.264 + * See the class description for the special cases of this parameter.
1.265 + * @param endDayOfWeek The daylight saving time ending day-of-week.
1.266 + * See the class description for the special cases of this parameter.
1.267 + * @param endTime The daylight saving ending time in local wall clock time,
1.268 + * which is local daylight time in this case.
1.269 + * @param dstSavings The amount of time in milliseconds saved during
1.270 + * daylight saving time.
1.271 + * @exception IllegalArgumentException if the month, day, dayOfWeek, or time
1.272 + * parameters are out of range for the start or end rule
1.273 + * @since 1.2
1.274 + */
1.275 + public SimpleTimeZone(int rawOffset, String ID,
1.276 + int startMonth, int startDay, int startDayOfWeek, int startTime,
1.277 + int endMonth, int endDay, int endDayOfWeek, int endTime,
1.278 + int dstSavings)
1.279 + {
1.280 + this(rawOffset, ID,
1.281 + startMonth, startDay, startDayOfWeek, startTime, WALL_TIME,
1.282 + endMonth, endDay, endDayOfWeek, endTime, WALL_TIME,
1.283 + dstSavings);
1.284 + }
1.285 +
1.286 + /**
1.287 + * Constructs a SimpleTimeZone with the given base time zone offset from
1.288 + * GMT, time zone ID, and rules for starting and ending the daylight
1.289 + * time.
1.290 + * This constructor takes the full set of the start and end rules
1.291 + * parameters, including modes of <code>startTime</code> and
1.292 + * <code>endTime</code>. The mode specifies either {@link #WALL_TIME wall
1.293 + * time} or {@link #STANDARD_TIME standard time} or {@link #UTC_TIME UTC
1.294 + * time}.
1.295 + *
1.296 + * @param rawOffset The given base time zone offset from GMT.
1.297 + * @param ID The time zone ID which is given to this object.
1.298 + * @param startMonth The daylight saving time starting month. Month is
1.299 + * a {@link Calendar#MONTH MONTH} field
1.300 + * value (0-based. e.g., 0 for January).
1.301 + * @param startDay The day of the month on which the daylight saving time starts.
1.302 + * See the class description for the special cases of this parameter.
1.303 + * @param startDayOfWeek The daylight saving time starting day-of-week.
1.304 + * See the class description for the special cases of this parameter.
1.305 + * @param startTime The daylight saving time starting time in the time mode
1.306 + * specified by <code>startTimeMode</code>.
1.307 + * @param startTimeMode The mode of the start time specified by startTime.
1.308 + * @param endMonth The daylight saving time ending month. Month is
1.309 + * a {@link Calendar#MONTH MONTH} field
1.310 + * value (0-based. e.g., 9 for October).
1.311 + * @param endDay The day of the month on which the daylight saving time ends.
1.312 + * See the class description for the special cases of this parameter.
1.313 + * @param endDayOfWeek The daylight saving time ending day-of-week.
1.314 + * See the class description for the special cases of this parameter.
1.315 + * @param endTime The daylight saving ending time in time time mode
1.316 + * specified by <code>endTimeMode</code>.
1.317 + * @param endTimeMode The mode of the end time specified by endTime
1.318 + * @param dstSavings The amount of time in milliseconds saved during
1.319 + * daylight saving time.
1.320 + *
1.321 + * @exception IllegalArgumentException if the month, day, dayOfWeek, time more, or
1.322 + * time parameters are out of range for the start or end rule, or if a time mode
1.323 + * value is invalid.
1.324 + *
1.325 + * @see #WALL_TIME
1.326 + * @see #STANDARD_TIME
1.327 + * @see #UTC_TIME
1.328 + *
1.329 + * @since 1.4
1.330 + */
1.331 + public SimpleTimeZone(int rawOffset, String ID,
1.332 + int startMonth, int startDay, int startDayOfWeek,
1.333 + int startTime, int startTimeMode,
1.334 + int endMonth, int endDay, int endDayOfWeek,
1.335 + int endTime, int endTimeMode,
1.336 + int dstSavings) {
1.337 +
1.338 + setID(ID);
1.339 + this.rawOffset = rawOffset;
1.340 + this.startMonth = startMonth;
1.341 + this.startDay = startDay;
1.342 + this.startDayOfWeek = startDayOfWeek;
1.343 + this.startTime = startTime;
1.344 + this.startTimeMode = startTimeMode;
1.345 + this.endMonth = endMonth;
1.346 + this.endDay = endDay;
1.347 + this.endDayOfWeek = endDayOfWeek;
1.348 + this.endTime = endTime;
1.349 + this.endTimeMode = endTimeMode;
1.350 + this.dstSavings = dstSavings;
1.351 +
1.352 + // this.useDaylight is set by decodeRules
1.353 + decodeRules();
1.354 + if (dstSavings <= 0) {
1.355 + throw new IllegalArgumentException("Illegal daylight saving value: " + dstSavings);
1.356 + }
1.357 + }
1.358 +
1.359 + /**
1.360 + * Sets the daylight saving time starting year.
1.361 + *
1.362 + * @param year The daylight saving starting year.
1.363 + */
1.364 + public void setStartYear(int year)
1.365 + {
1.366 + startYear = year;
1.367 + invalidateCache();
1.368 + }
1.369 +
1.370 + /**
1.371 + * Sets the daylight saving time start rule. For example, if daylight saving
1.372 + * time starts on the first Sunday in April at 2 am in local wall clock
1.373 + * time, you can set the start rule by calling:
1.374 + * <pre><code>setStartRule(Calendar.APRIL, 1, Calendar.SUNDAY, 2*60*60*1000);</code></pre>
1.375 + *
1.376 + * @param startMonth The daylight saving time starting month. Month is
1.377 + * a {@link Calendar#MONTH MONTH} field
1.378 + * value (0-based. e.g., 0 for January).
1.379 + * @param startDay The day of the month on which the daylight saving time starts.
1.380 + * See the class description for the special cases of this parameter.
1.381 + * @param startDayOfWeek The daylight saving time starting day-of-week.
1.382 + * See the class description for the special cases of this parameter.
1.383 + * @param startTime The daylight saving time starting time in local wall clock
1.384 + * time, which is local standard time in this case.
1.385 + * @exception IllegalArgumentException if the <code>startMonth</code>, <code>startDay</code>,
1.386 + * <code>startDayOfWeek</code>, or <code>startTime</code> parameters are out of range
1.387 + */
1.388 + public void setStartRule(int startMonth, int startDay, int startDayOfWeek, int startTime)
1.389 + {
1.390 + this.startMonth = startMonth;
1.391 + this.startDay = startDay;
1.392 + this.startDayOfWeek = startDayOfWeek;
1.393 + this.startTime = startTime;
1.394 + startTimeMode = WALL_TIME;
1.395 + decodeStartRule();
1.396 + invalidateCache();
1.397 + }
1.398 +
1.399 + /**
1.400 + * Sets the daylight saving time start rule to a fixed date within a month.
1.401 + * This method is equivalent to:
1.402 + * <pre><code>setStartRule(startMonth, startDay, 0, startTime)</code></pre>
1.403 + *
1.404 + * @param startMonth The daylight saving time starting month. Month is
1.405 + * a {@link Calendar#MONTH MONTH} field
1.406 + * value (0-based. e.g., 0 for January).
1.407 + * @param startDay The day of the month on which the daylight saving time starts.
1.408 + * @param startTime The daylight saving time starting time in local wall clock
1.409 + * time, which is local standard time in this case.
1.410 + * See the class description for the special cases of this parameter.
1.411 + * @exception IllegalArgumentException if the <code>startMonth</code>,
1.412 + * <code>startDayOfMonth</code>, or <code>startTime</code> parameters are out of range
1.413 + * @since 1.2
1.414 + */
1.415 + public void setStartRule(int startMonth, int startDay, int startTime) {
1.416 + setStartRule(startMonth, startDay, 0, startTime);
1.417 + }
1.418 +
1.419 + /**
1.420 + * Sets the daylight saving time start rule to a weekday before or after the given date within
1.421 + * a month, e.g., the first Monday on or after the 8th.
1.422 + *
1.423 + * @param startMonth The daylight saving time starting month. Month is
1.424 + * a {@link Calendar#MONTH MONTH} field
1.425 + * value (0-based. e.g., 0 for January).
1.426 + * @param startDay The day of the month on which the daylight saving time starts.
1.427 + * @param startDayOfWeek The daylight saving time starting day-of-week.
1.428 + * @param startTime The daylight saving time starting time in local wall clock
1.429 + * time, which is local standard time in this case.
1.430 + * @param after If true, this rule selects the first <code>dayOfWeek</code> on or
1.431 + * <em>after</em> <code>dayOfMonth</code>. If false, this rule
1.432 + * selects the last <code>dayOfWeek</code> on or <em>before</em>
1.433 + * <code>dayOfMonth</code>.
1.434 + * @exception IllegalArgumentException if the <code>startMonth</code>, <code>startDay</code>,
1.435 + * <code>startDayOfWeek</code>, or <code>startTime</code> parameters are out of range
1.436 + * @since 1.2
1.437 + */
1.438 + public void setStartRule(int startMonth, int startDay, int startDayOfWeek,
1.439 + int startTime, boolean after)
1.440 + {
1.441 + // TODO: this method doesn't check the initial values of dayOfMonth or dayOfWeek.
1.442 + if (after) {
1.443 + setStartRule(startMonth, startDay, -startDayOfWeek, startTime);
1.444 + } else {
1.445 + setStartRule(startMonth, -startDay, -startDayOfWeek, startTime);
1.446 + }
1.447 + }
1.448 +
1.449 + /**
1.450 + * Sets the daylight saving time end rule. For example, if daylight saving time
1.451 + * ends on the last Sunday in October at 2 am in wall clock time,
1.452 + * you can set the end rule by calling:
1.453 + * <code>setEndRule(Calendar.OCTOBER, -1, Calendar.SUNDAY, 2*60*60*1000);</code>
1.454 + *
1.455 + * @param endMonth The daylight saving time ending month. Month is
1.456 + * a {@link Calendar#MONTH MONTH} field
1.457 + * value (0-based. e.g., 9 for October).
1.458 + * @param endDay The day of the month on which the daylight saving time ends.
1.459 + * See the class description for the special cases of this parameter.
1.460 + * @param endDayOfWeek The daylight saving time ending day-of-week.
1.461 + * See the class description for the special cases of this parameter.
1.462 + * @param endTime The daylight saving ending time in local wall clock time,
1.463 + * (in milliseconds within the day) which is local daylight
1.464 + * time in this case.
1.465 + * @exception IllegalArgumentException if the <code>endMonth</code>, <code>endDay</code>,
1.466 + * <code>endDayOfWeek</code>, or <code>endTime</code> parameters are out of range
1.467 + */
1.468 + public void setEndRule(int endMonth, int endDay, int endDayOfWeek,
1.469 + int endTime)
1.470 + {
1.471 + this.endMonth = endMonth;
1.472 + this.endDay = endDay;
1.473 + this.endDayOfWeek = endDayOfWeek;
1.474 + this.endTime = endTime;
1.475 + this.endTimeMode = WALL_TIME;
1.476 + decodeEndRule();
1.477 + invalidateCache();
1.478 + }
1.479 +
1.480 + /**
1.481 + * Sets the daylight saving time end rule to a fixed date within a month.
1.482 + * This method is equivalent to:
1.483 + * <pre><code>setEndRule(endMonth, endDay, 0, endTime)</code></pre>
1.484 + *
1.485 + * @param endMonth The daylight saving time ending month. Month is
1.486 + * a {@link Calendar#MONTH MONTH} field
1.487 + * value (0-based. e.g., 9 for October).
1.488 + * @param endDay The day of the month on which the daylight saving time ends.
1.489 + * @param endTime The daylight saving ending time in local wall clock time,
1.490 + * (in milliseconds within the day) which is local daylight
1.491 + * time in this case.
1.492 + * @exception IllegalArgumentException the <code>endMonth</code>, <code>endDay</code>,
1.493 + * or <code>endTime</code> parameters are out of range
1.494 + * @since 1.2
1.495 + */
1.496 + public void setEndRule(int endMonth, int endDay, int endTime)
1.497 + {
1.498 + setEndRule(endMonth, endDay, 0, endTime);
1.499 + }
1.500 +
1.501 + /**
1.502 + * Sets the daylight saving time end rule to a weekday before or after the given date within
1.503 + * a month, e.g., the first Monday on or after the 8th.
1.504 + *
1.505 + * @param endMonth The daylight saving time ending month. Month is
1.506 + * a {@link Calendar#MONTH MONTH} field
1.507 + * value (0-based. e.g., 9 for October).
1.508 + * @param endDay The day of the month on which the daylight saving time ends.
1.509 + * @param endDayOfWeek The daylight saving time ending day-of-week.
1.510 + * @param endTime The daylight saving ending time in local wall clock time,
1.511 + * (in milliseconds within the day) which is local daylight
1.512 + * time in this case.
1.513 + * @param after If true, this rule selects the first <code>endDayOfWeek</code> on
1.514 + * or <em>after</em> <code>endDay</code>. If false, this rule
1.515 + * selects the last <code>endDayOfWeek</code> on or before
1.516 + * <code>endDay</code> of the month.
1.517 + * @exception IllegalArgumentException the <code>endMonth</code>, <code>endDay</code>,
1.518 + * <code>endDayOfWeek</code>, or <code>endTime</code> parameters are out of range
1.519 + * @since 1.2
1.520 + */
1.521 + public void setEndRule(int endMonth, int endDay, int endDayOfWeek, int endTime, boolean after)
1.522 + {
1.523 + if (after) {
1.524 + setEndRule(endMonth, endDay, -endDayOfWeek, endTime);
1.525 + } else {
1.526 + setEndRule(endMonth, -endDay, -endDayOfWeek, endTime);
1.527 + }
1.528 + }
1.529 +
1.530 + /**
1.531 + * Returns the offset of this time zone from UTC at the given
1.532 + * time. If daylight saving time is in effect at the given time,
1.533 + * the offset value is adjusted with the amount of daylight
1.534 + * saving.
1.535 + *
1.536 + * @param date the time at which the time zone offset is found
1.537 + * @return the amount of time in milliseconds to add to UTC to get
1.538 + * local time.
1.539 + * @since 1.4
1.540 + */
1.541 + public int getOffset(long date) {
1.542 + return getOffsets(date, null);
1.543 + }
1.544 +
1.545 + /**
1.546 + * @see TimeZone#getOffsets
1.547 + */
1.548 + int getOffsets(long date, int[] offsets) {
1.549 + int offset = rawOffset;
1.550 +
1.551 + computeOffset:
1.552 + if (useDaylight) {
1.553 + synchronized (this) {
1.554 + if (cacheStart != 0) {
1.555 + if (date >= cacheStart && date < cacheEnd) {
1.556 + offset += dstSavings;
1.557 + break computeOffset;
1.558 + }
1.559 + }
1.560 + }
1.561 + BaseCalendar cal = date >= GregorianCalendar.DEFAULT_GREGORIAN_CUTOVER ?
1.562 + gcal : (BaseCalendar) CalendarSystem.forName("julian");
1.563 + BaseCalendar.Date cdate = (BaseCalendar.Date) cal.newCalendarDate(TimeZone.NO_TIMEZONE);
1.564 + // Get the year in local time
1.565 + cal.getCalendarDate(date + rawOffset, cdate);
1.566 + int year = cdate.getNormalizedYear();
1.567 + if (year >= startYear) {
1.568 + // Clear time elements for the transition calculations
1.569 + cdate.setTimeOfDay(0, 0, 0, 0);
1.570 + offset = getOffset(cal, cdate, year, date);
1.571 + }
1.572 + }
1.573 +
1.574 + if (offsets != null) {
1.575 + offsets[0] = rawOffset;
1.576 + offsets[1] = offset - rawOffset;
1.577 + }
1.578 + return offset;
1.579 + }
1.580 +
1.581 + /**
1.582 + * Returns the difference in milliseconds between local time and
1.583 + * UTC, taking into account both the raw offset and the effect of
1.584 + * daylight saving, for the specified date and time. This method
1.585 + * assumes that the start and end month are distinct. It also
1.586 + * uses a default {@link GregorianCalendar} object as its
1.587 + * underlying calendar, such as for determining leap years. Do
1.588 + * not use the result of this method with a calendar other than a
1.589 + * default <code>GregorianCalendar</code>.
1.590 + *
1.591 + * <p><em>Note: In general, clients should use
1.592 + * <code>Calendar.get(ZONE_OFFSET) + Calendar.get(DST_OFFSET)</code>
1.593 + * instead of calling this method.</em>
1.594 + *
1.595 + * @param era The era of the given date.
1.596 + * @param year The year in the given date.
1.597 + * @param month The month in the given date. Month is 0-based. e.g.,
1.598 + * 0 for January.
1.599 + * @param day The day-in-month of the given date.
1.600 + * @param dayOfWeek The day-of-week of the given date.
1.601 + * @param millis The milliseconds in day in <em>standard</em> local time.
1.602 + * @return The milliseconds to add to UTC to get local time.
1.603 + * @exception IllegalArgumentException the <code>era</code>,
1.604 + * <code>month</code>, <code>day</code>, <code>dayOfWeek</code>,
1.605 + * or <code>millis</code> parameters are out of range
1.606 + */
1.607 + public int getOffset(int era, int year, int month, int day, int dayOfWeek,
1.608 + int millis)
1.609 + {
1.610 + if (era != GregorianCalendar.AD && era != GregorianCalendar.BC) {
1.611 + throw new IllegalArgumentException("Illegal era " + era);
1.612 + }
1.613 +
1.614 + int y = year;
1.615 + if (era == GregorianCalendar.BC) {
1.616 + // adjust y with the GregorianCalendar-style year numbering.
1.617 + y = 1 - y;
1.618 + }
1.619 +
1.620 + // If the year isn't representable with the 64-bit long
1.621 + // integer in milliseconds, convert the year to an
1.622 + // equivalent year. This is required to pass some JCK test cases
1.623 + // which are actually useless though because the specified years
1.624 + // can't be supported by the Java time system.
1.625 + if (y >= 292278994) {
1.626 + y = 2800 + y % 2800;
1.627 + } else if (y <= -292269054) {
1.628 + // y %= 28 also produces an equivalent year, but positive
1.629 + // year numbers would be convenient to use the UNIX cal
1.630 + // command.
1.631 + y = (int) CalendarUtils.mod((long) y, 28);
1.632 + }
1.633 +
1.634 + // convert year to its 1-based month value
1.635 + int m = month + 1;
1.636 +
1.637 + // First, calculate time as a Gregorian date.
1.638 + BaseCalendar cal = gcal;
1.639 + BaseCalendar.Date cdate = (BaseCalendar.Date) cal.newCalendarDate(TimeZone.NO_TIMEZONE);
1.640 + cdate.setDate(y, m, day);
1.641 + long time = cal.getTime(cdate); // normalize cdate
1.642 + time += millis - rawOffset; // UTC time
1.643 +
1.644 + // If the time value represents a time before the default
1.645 + // Gregorian cutover, recalculate time using the Julian
1.646 + // calendar system. For the Julian calendar system, the
1.647 + // normalized year numbering is ..., -2 (BCE 2), -1 (BCE 1),
1.648 + // 1, 2 ... which is different from the GregorianCalendar
1.649 + // style year numbering (..., -1, 0 (BCE 1), 1, 2, ...).
1.650 + if (time < GregorianCalendar.DEFAULT_GREGORIAN_CUTOVER) {
1.651 + cal = (BaseCalendar) CalendarSystem.forName("julian");
1.652 + cdate = (BaseCalendar.Date) cal.newCalendarDate(TimeZone.NO_TIMEZONE);
1.653 + cdate.setNormalizedDate(y, m, day);
1.654 + time = cal.getTime(cdate) + millis - rawOffset;
1.655 + }
1.656 +
1.657 + if ((cdate.getNormalizedYear() != y)
1.658 + || (cdate.getMonth() != m)
1.659 + || (cdate.getDayOfMonth() != day)
1.660 + // The validation should be cdate.getDayOfWeek() ==
1.661 + // dayOfWeek. However, we don't check dayOfWeek for
1.662 + // compatibility.
1.663 + || (dayOfWeek < Calendar.SUNDAY || dayOfWeek > Calendar.SATURDAY)
1.664 + || (millis < 0 || millis >= (24*60*60*1000))) {
1.665 + throw new IllegalArgumentException();
1.666 + }
1.667 +
1.668 + if (!useDaylight || year < startYear || era != GregorianCalendar.CE) {
1.669 + return rawOffset;
1.670 + }
1.671 +
1.672 + return getOffset(cal, cdate, y, time);
1.673 + }
1.674 +
1.675 + private int getOffset(BaseCalendar cal, BaseCalendar.Date cdate, int year, long time) {
1.676 + synchronized (this) {
1.677 + if (cacheStart != 0) {
1.678 + if (time >= cacheStart && time < cacheEnd) {
1.679 + return rawOffset + dstSavings;
1.680 + }
1.681 + if (year == cacheYear) {
1.682 + return rawOffset;
1.683 + }
1.684 + }
1.685 + }
1.686 +
1.687 + long start = getStart(cal, cdate, year);
1.688 + long end = getEnd(cal, cdate, year);
1.689 + int offset = rawOffset;
1.690 + if (start <= end) {
1.691 + if (time >= start && time < end) {
1.692 + offset += dstSavings;
1.693 + }
1.694 + synchronized (this) {
1.695 + cacheYear = year;
1.696 + cacheStart = start;
1.697 + cacheEnd = end;
1.698 + }
1.699 + } else {
1.700 + if (time < end) {
1.701 + // TODO: support Gregorian cutover. The previous year
1.702 + // may be in the other calendar system.
1.703 + start = getStart(cal, cdate, year - 1);
1.704 + if (time >= start) {
1.705 + offset += dstSavings;
1.706 + }
1.707 + } else if (time >= start) {
1.708 + // TODO: support Gregorian cutover. The next year
1.709 + // may be in the other calendar system.
1.710 + end = getEnd(cal, cdate, year + 1);
1.711 + if (time < end) {
1.712 + offset += dstSavings;
1.713 + }
1.714 + }
1.715 + if (start <= end) {
1.716 + synchronized (this) {
1.717 + // The start and end transitions are in multiple years.
1.718 + cacheYear = (long) startYear - 1;
1.719 + cacheStart = start;
1.720 + cacheEnd = end;
1.721 + }
1.722 + }
1.723 + }
1.724 + return offset;
1.725 + }
1.726 +
1.727 + private long getStart(BaseCalendar cal, BaseCalendar.Date cdate, int year) {
1.728 + int time = startTime;
1.729 + if (startTimeMode != UTC_TIME) {
1.730 + time -= rawOffset;
1.731 + }
1.732 + return getTransition(cal, cdate, startMode, year, startMonth, startDay,
1.733 + startDayOfWeek, time);
1.734 + }
1.735 +
1.736 + private long getEnd(BaseCalendar cal, BaseCalendar.Date cdate, int year) {
1.737 + int time = endTime;
1.738 + if (endTimeMode != UTC_TIME) {
1.739 + time -= rawOffset;
1.740 + }
1.741 + if (endTimeMode == WALL_TIME) {
1.742 + time -= dstSavings;
1.743 + }
1.744 + return getTransition(cal, cdate, endMode, year, endMonth, endDay,
1.745 + endDayOfWeek, time);
1.746 + }
1.747 +
1.748 + private long getTransition(BaseCalendar cal, BaseCalendar.Date cdate,
1.749 + int mode, int year, int month, int dayOfMonth,
1.750 + int dayOfWeek, int timeOfDay) {
1.751 + cdate.setNormalizedYear(year);
1.752 + cdate.setMonth(month + 1);
1.753 + switch (mode) {
1.754 + case DOM_MODE:
1.755 + cdate.setDayOfMonth(dayOfMonth);
1.756 + break;
1.757 +
1.758 + case DOW_IN_MONTH_MODE:
1.759 + cdate.setDayOfMonth(1);
1.760 + if (dayOfMonth < 0) {
1.761 + cdate.setDayOfMonth(cal.getMonthLength(cdate));
1.762 + }
1.763 + cdate = (BaseCalendar.Date) cal.getNthDayOfWeek(dayOfMonth, dayOfWeek, cdate);
1.764 + break;
1.765 +
1.766 + case DOW_GE_DOM_MODE:
1.767 + cdate.setDayOfMonth(dayOfMonth);
1.768 + cdate = (BaseCalendar.Date) cal.getNthDayOfWeek(1, dayOfWeek, cdate);
1.769 + break;
1.770 +
1.771 + case DOW_LE_DOM_MODE:
1.772 + cdate.setDayOfMonth(dayOfMonth);
1.773 + cdate = (BaseCalendar.Date) cal.getNthDayOfWeek(-1, dayOfWeek, cdate);
1.774 + break;
1.775 + }
1.776 + return cal.getTime(cdate) + timeOfDay;
1.777 + }
1.778 +
1.779 + /**
1.780 + * Gets the GMT offset for this time zone.
1.781 + * @return the GMT offset value in milliseconds
1.782 + * @see #setRawOffset
1.783 + */
1.784 + public int getRawOffset()
1.785 + {
1.786 + // The given date will be taken into account while
1.787 + // we have the historical time zone data in place.
1.788 + return rawOffset;
1.789 + }
1.790 +
1.791 + /**
1.792 + * Sets the base time zone offset to GMT.
1.793 + * This is the offset to add to UTC to get local time.
1.794 + * @see #getRawOffset
1.795 + */
1.796 + public void setRawOffset(int offsetMillis)
1.797 + {
1.798 + this.rawOffset = offsetMillis;
1.799 + }
1.800 +
1.801 + /**
1.802 + * Sets the amount of time in milliseconds that the clock is advanced
1.803 + * during daylight saving time.
1.804 + * @param millisSavedDuringDST the number of milliseconds the time is
1.805 + * advanced with respect to standard time when the daylight saving time rules
1.806 + * are in effect. A positive number, typically one hour (3600000).
1.807 + * @see #getDSTSavings
1.808 + * @since 1.2
1.809 + */
1.810 + public void setDSTSavings(int millisSavedDuringDST) {
1.811 + if (millisSavedDuringDST <= 0) {
1.812 + throw new IllegalArgumentException("Illegal daylight saving value: "
1.813 + + millisSavedDuringDST);
1.814 + }
1.815 + dstSavings = millisSavedDuringDST;
1.816 + }
1.817 +
1.818 + /**
1.819 + * Returns the amount of time in milliseconds that the clock is
1.820 + * advanced during daylight saving time.
1.821 + *
1.822 + * @return the number of milliseconds the time is advanced with
1.823 + * respect to standard time when the daylight saving rules are in
1.824 + * effect, or 0 (zero) if this time zone doesn't observe daylight
1.825 + * saving time.
1.826 + *
1.827 + * @see #setDSTSavings
1.828 + * @since 1.2
1.829 + */
1.830 + public int getDSTSavings() {
1.831 + return useDaylight ? dstSavings : 0;
1.832 + }
1.833 +
1.834 + /**
1.835 + * Queries if this time zone uses daylight saving time.
1.836 + * @return true if this time zone uses daylight saving time;
1.837 + * false otherwise.
1.838 + */
1.839 + public boolean useDaylightTime()
1.840 + {
1.841 + return useDaylight;
1.842 + }
1.843 +
1.844 + /**
1.845 + * Returns {@code true} if this {@code SimpleTimeZone} observes
1.846 + * Daylight Saving Time. This method is equivalent to {@link
1.847 + * #useDaylightTime()}.
1.848 + *
1.849 + * @return {@code true} if this {@code SimpleTimeZone} observes
1.850 + * Daylight Saving Time; {@code false} otherwise.
1.851 + * @since 1.7
1.852 + */
1.853 + @Override
1.854 + public boolean observesDaylightTime() {
1.855 + return useDaylightTime();
1.856 + }
1.857 +
1.858 + /**
1.859 + * Queries if the given date is in daylight saving time.
1.860 + * @return true if daylight saving time is in effective at the
1.861 + * given date; false otherwise.
1.862 + */
1.863 + public boolean inDaylightTime(Date date)
1.864 + {
1.865 + return (getOffset(date.getTime()) != rawOffset);
1.866 + }
1.867 +
1.868 + /**
1.869 + * Returns a clone of this <code>SimpleTimeZone</code> instance.
1.870 + * @return a clone of this instance.
1.871 + */
1.872 + public Object clone()
1.873 + {
1.874 + return super.clone();
1.875 + }
1.876 +
1.877 + /**
1.878 + * Generates the hash code for the SimpleDateFormat object.
1.879 + * @return the hash code for this object
1.880 + */
1.881 + public synchronized int hashCode()
1.882 + {
1.883 + return startMonth ^ startDay ^ startDayOfWeek ^ startTime ^
1.884 + endMonth ^ endDay ^ endDayOfWeek ^ endTime ^ rawOffset;
1.885 + }
1.886 +
1.887 + /**
1.888 + * Compares the equality of two <code>SimpleTimeZone</code> objects.
1.889 + *
1.890 + * @param obj The <code>SimpleTimeZone</code> object to be compared with.
1.891 + * @return True if the given <code>obj</code> is the same as this
1.892 + * <code>SimpleTimeZone</code> object; false otherwise.
1.893 + */
1.894 + public boolean equals(Object obj)
1.895 + {
1.896 + if (this == obj) {
1.897 + return true;
1.898 + }
1.899 + if (!(obj instanceof SimpleTimeZone)) {
1.900 + return false;
1.901 + }
1.902 +
1.903 + SimpleTimeZone that = (SimpleTimeZone) obj;
1.904 +
1.905 + return getID().equals(that.getID()) &&
1.906 + hasSameRules(that);
1.907 + }
1.908 +
1.909 + /**
1.910 + * Returns <code>true</code> if this zone has the same rules and offset as another zone.
1.911 + * @param other the TimeZone object to be compared with
1.912 + * @return <code>true</code> if the given zone is a SimpleTimeZone and has the
1.913 + * same rules and offset as this one
1.914 + * @since 1.2
1.915 + */
1.916 + public boolean hasSameRules(TimeZone other) {
1.917 + if (this == other) {
1.918 + return true;
1.919 + }
1.920 + if (!(other instanceof SimpleTimeZone)) {
1.921 + return false;
1.922 + }
1.923 + SimpleTimeZone that = (SimpleTimeZone) other;
1.924 + return rawOffset == that.rawOffset &&
1.925 + useDaylight == that.useDaylight &&
1.926 + (!useDaylight
1.927 + // Only check rules if using DST
1.928 + || (dstSavings == that.dstSavings &&
1.929 + startMode == that.startMode &&
1.930 + startMonth == that.startMonth &&
1.931 + startDay == that.startDay &&
1.932 + startDayOfWeek == that.startDayOfWeek &&
1.933 + startTime == that.startTime &&
1.934 + startTimeMode == that.startTimeMode &&
1.935 + endMode == that.endMode &&
1.936 + endMonth == that.endMonth &&
1.937 + endDay == that.endDay &&
1.938 + endDayOfWeek == that.endDayOfWeek &&
1.939 + endTime == that.endTime &&
1.940 + endTimeMode == that.endTimeMode &&
1.941 + startYear == that.startYear));
1.942 + }
1.943 +
1.944 + /**
1.945 + * Returns a string representation of this time zone.
1.946 + * @return a string representation of this time zone.
1.947 + */
1.948 + public String toString() {
1.949 + return getClass().getName() +
1.950 + "[id=" + getID() +
1.951 + ",offset=" + rawOffset +
1.952 + ",dstSavings=" + dstSavings +
1.953 + ",useDaylight=" + useDaylight +
1.954 + ",startYear=" + startYear +
1.955 + ",startMode=" + startMode +
1.956 + ",startMonth=" + startMonth +
1.957 + ",startDay=" + startDay +
1.958 + ",startDayOfWeek=" + startDayOfWeek +
1.959 + ",startTime=" + startTime +
1.960 + ",startTimeMode=" + startTimeMode +
1.961 + ",endMode=" + endMode +
1.962 + ",endMonth=" + endMonth +
1.963 + ",endDay=" + endDay +
1.964 + ",endDayOfWeek=" + endDayOfWeek +
1.965 + ",endTime=" + endTime +
1.966 + ",endTimeMode=" + endTimeMode + ']';
1.967 + }
1.968 +
1.969 + // =======================privates===============================
1.970 +
1.971 + /**
1.972 + * The month in which daylight saving time starts. This value must be
1.973 + * between <code>Calendar.JANUARY</code> and
1.974 + * <code>Calendar.DECEMBER</code> inclusive. This value must not equal
1.975 + * <code>endMonth</code>.
1.976 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.977 + * @serial
1.978 + */
1.979 + private int startMonth;
1.980 +
1.981 + /**
1.982 + * This field has two possible interpretations:
1.983 + * <dl>
1.984 + * <dt><code>startMode == DOW_IN_MONTH</code></dt>
1.985 + * <dd>
1.986 + * <code>startDay</code> indicates the day of the month of
1.987 + * <code>startMonth</code> on which daylight
1.988 + * saving time starts, from 1 to 28, 30, or 31, depending on the
1.989 + * <code>startMonth</code>.
1.990 + * </dd>
1.991 + * <dt><code>startMode != DOW_IN_MONTH</code></dt>
1.992 + * <dd>
1.993 + * <code>startDay</code> indicates which <code>startDayOfWeek</code> in the
1.994 + * month <code>startMonth</code> daylight
1.995 + * saving time starts on. For example, a value of +1 and a
1.996 + * <code>startDayOfWeek</code> of <code>Calendar.SUNDAY</code> indicates the
1.997 + * first Sunday of <code>startMonth</code>. Likewise, +2 would indicate the
1.998 + * second Sunday, and -1 the last Sunday. A value of 0 is illegal.
1.999 + * </dd>
1.1000 + * </dl>
1.1001 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1002 + * @serial
1.1003 + */
1.1004 + private int startDay;
1.1005 +
1.1006 + /**
1.1007 + * The day of the week on which daylight saving time starts. This value
1.1008 + * must be between <code>Calendar.SUNDAY</code> and
1.1009 + * <code>Calendar.SATURDAY</code> inclusive.
1.1010 + * <p>If <code>useDaylight</code> is false or
1.1011 + * <code>startMode == DAY_OF_MONTH</code>, this value is ignored.
1.1012 + * @serial
1.1013 + */
1.1014 + private int startDayOfWeek;
1.1015 +
1.1016 + /**
1.1017 + * The time in milliseconds after midnight at which daylight saving
1.1018 + * time starts. This value is expressed as wall time, standard time,
1.1019 + * or UTC time, depending on the setting of <code>startTimeMode</code>.
1.1020 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1021 + * @serial
1.1022 + */
1.1023 + private int startTime;
1.1024 +
1.1025 + /**
1.1026 + * The format of startTime, either WALL_TIME, STANDARD_TIME, or UTC_TIME.
1.1027 + * @serial
1.1028 + * @since 1.3
1.1029 + */
1.1030 + private int startTimeMode;
1.1031 +
1.1032 + /**
1.1033 + * The month in which daylight saving time ends. This value must be
1.1034 + * between <code>Calendar.JANUARY</code> and
1.1035 + * <code>Calendar.UNDECIMBER</code>. This value must not equal
1.1036 + * <code>startMonth</code>.
1.1037 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1038 + * @serial
1.1039 + */
1.1040 + private int endMonth;
1.1041 +
1.1042 + /**
1.1043 + * This field has two possible interpretations:
1.1044 + * <dl>
1.1045 + * <dt><code>endMode == DOW_IN_MONTH</code></dt>
1.1046 + * <dd>
1.1047 + * <code>endDay</code> indicates the day of the month of
1.1048 + * <code>endMonth</code> on which daylight
1.1049 + * saving time ends, from 1 to 28, 30, or 31, depending on the
1.1050 + * <code>endMonth</code>.
1.1051 + * </dd>
1.1052 + * <dt><code>endMode != DOW_IN_MONTH</code></dt>
1.1053 + * <dd>
1.1054 + * <code>endDay</code> indicates which <code>endDayOfWeek</code> in th
1.1055 + * month <code>endMonth</code> daylight
1.1056 + * saving time ends on. For example, a value of +1 and a
1.1057 + * <code>endDayOfWeek</code> of <code>Calendar.SUNDAY</code> indicates the
1.1058 + * first Sunday of <code>endMonth</code>. Likewise, +2 would indicate the
1.1059 + * second Sunday, and -1 the last Sunday. A value of 0 is illegal.
1.1060 + * </dd>
1.1061 + * </dl>
1.1062 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1063 + * @serial
1.1064 + */
1.1065 + private int endDay;
1.1066 +
1.1067 + /**
1.1068 + * The day of the week on which daylight saving time ends. This value
1.1069 + * must be between <code>Calendar.SUNDAY</code> and
1.1070 + * <code>Calendar.SATURDAY</code> inclusive.
1.1071 + * <p>If <code>useDaylight</code> is false or
1.1072 + * <code>endMode == DAY_OF_MONTH</code>, this value is ignored.
1.1073 + * @serial
1.1074 + */
1.1075 + private int endDayOfWeek;
1.1076 +
1.1077 + /**
1.1078 + * The time in milliseconds after midnight at which daylight saving
1.1079 + * time ends. This value is expressed as wall time, standard time,
1.1080 + * or UTC time, depending on the setting of <code>endTimeMode</code>.
1.1081 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1082 + * @serial
1.1083 + */
1.1084 + private int endTime;
1.1085 +
1.1086 + /**
1.1087 + * The format of endTime, either <code>WALL_TIME</code>,
1.1088 + * <code>STANDARD_TIME</code>, or <code>UTC_TIME</code>.
1.1089 + * @serial
1.1090 + * @since 1.3
1.1091 + */
1.1092 + private int endTimeMode;
1.1093 +
1.1094 + /**
1.1095 + * The year in which daylight saving time is first observed. This is an {@link GregorianCalendar#AD AD}
1.1096 + * value. If this value is less than 1 then daylight saving time is observed
1.1097 + * for all <code>AD</code> years.
1.1098 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1099 + * @serial
1.1100 + */
1.1101 + private int startYear;
1.1102 +
1.1103 + /**
1.1104 + * The offset in milliseconds between this zone and GMT. Negative offsets
1.1105 + * are to the west of Greenwich. To obtain local <em>standard</em> time,
1.1106 + * add the offset to GMT time. To obtain local wall time it may also be
1.1107 + * necessary to add <code>dstSavings</code>.
1.1108 + * @serial
1.1109 + */
1.1110 + private int rawOffset;
1.1111 +
1.1112 + /**
1.1113 + * A boolean value which is true if and only if this zone uses daylight
1.1114 + * saving time. If this value is false, several other fields are ignored.
1.1115 + * @serial
1.1116 + */
1.1117 + private boolean useDaylight=false; // indicate if this time zone uses DST
1.1118 +
1.1119 + private static final int millisPerHour = 60*60*1000;
1.1120 + private static final int millisPerDay = 24*millisPerHour;
1.1121 +
1.1122 + /**
1.1123 + * This field was serialized in JDK 1.1, so we have to keep it that way
1.1124 + * to maintain serialization compatibility. However, there's no need to
1.1125 + * recreate the array each time we create a new time zone.
1.1126 + * @serial An array of bytes containing the values {31, 28, 31, 30, 31, 30,
1.1127 + * 31, 31, 30, 31, 30, 31}. This is ignored as of the Java 2 platform v1.2, however, it must
1.1128 + * be streamed out for compatibility with JDK 1.1.
1.1129 + */
1.1130 + private final byte monthLength[] = staticMonthLength;
1.1131 + private final static byte staticMonthLength[] = {31,28,31,30,31,30,31,31,30,31,30,31};
1.1132 + private final static byte staticLeapMonthLength[] = {31,29,31,30,31,30,31,31,30,31,30,31};
1.1133 +
1.1134 + /**
1.1135 + * Variables specifying the mode of the start rule. Takes the following
1.1136 + * values:
1.1137 + * <dl>
1.1138 + * <dt><code>DOM_MODE</code></dt>
1.1139 + * <dd>
1.1140 + * Exact day of week; e.g., March 1.
1.1141 + * </dd>
1.1142 + * <dt><code>DOW_IN_MONTH_MODE</code></dt>
1.1143 + * <dd>
1.1144 + * Day of week in month; e.g., last Sunday in March.
1.1145 + * </dd>
1.1146 + * <dt><code>DOW_GE_DOM_MODE</code></dt>
1.1147 + * <dd>
1.1148 + * Day of week after day of month; e.g., Sunday on or after March 15.
1.1149 + * </dd>
1.1150 + * <dt><code>DOW_LE_DOM_MODE</code></dt>
1.1151 + * <dd>
1.1152 + * Day of week before day of month; e.g., Sunday on or before March 15.
1.1153 + * </dd>
1.1154 + * </dl>
1.1155 + * The setting of this field affects the interpretation of the
1.1156 + * <code>startDay</code> field.
1.1157 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1158 + * @serial
1.1159 + * @since 1.1.4
1.1160 + */
1.1161 + private int startMode;
1.1162 +
1.1163 + /**
1.1164 + * Variables specifying the mode of the end rule. Takes the following
1.1165 + * values:
1.1166 + * <dl>
1.1167 + * <dt><code>DOM_MODE</code></dt>
1.1168 + * <dd>
1.1169 + * Exact day of week; e.g., March 1.
1.1170 + * </dd>
1.1171 + * <dt><code>DOW_IN_MONTH_MODE</code></dt>
1.1172 + * <dd>
1.1173 + * Day of week in month; e.g., last Sunday in March.
1.1174 + * </dd>
1.1175 + * <dt><code>DOW_GE_DOM_MODE</code></dt>
1.1176 + * <dd>
1.1177 + * Day of week after day of month; e.g., Sunday on or after March 15.
1.1178 + * </dd>
1.1179 + * <dt><code>DOW_LE_DOM_MODE</code></dt>
1.1180 + * <dd>
1.1181 + * Day of week before day of month; e.g., Sunday on or before March 15.
1.1182 + * </dd>
1.1183 + * </dl>
1.1184 + * The setting of this field affects the interpretation of the
1.1185 + * <code>endDay</code> field.
1.1186 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1187 + * @serial
1.1188 + * @since 1.1.4
1.1189 + */
1.1190 + private int endMode;
1.1191 +
1.1192 + /**
1.1193 + * A positive value indicating the amount of time saved during DST in
1.1194 + * milliseconds.
1.1195 + * Typically one hour (3600000); sometimes 30 minutes (1800000).
1.1196 + * <p>If <code>useDaylight</code> is false, this value is ignored.
1.1197 + * @serial
1.1198 + * @since 1.1.4
1.1199 + */
1.1200 + private int dstSavings;
1.1201 +
1.1202 + private static final Gregorian gcal = CalendarSystem.getGregorianCalendar();
1.1203 +
1.1204 + /**
1.1205 + * Cache values representing a single period of daylight saving
1.1206 + * time. When the cache values are valid, cacheStart is the start
1.1207 + * time (inclusive) of daylight saving time and cacheEnd is the
1.1208 + * end time (exclusive).
1.1209 + *
1.1210 + * cacheYear has a year value if both cacheStart and cacheEnd are
1.1211 + * in the same year. cacheYear is set to startYear - 1 if
1.1212 + * cacheStart and cacheEnd are in different years. cacheStart is 0
1.1213 + * if the cache values are void. cacheYear is a long to support
1.1214 + * Integer.MIN_VALUE - 1 (JCK requirement).
1.1215 + */
1.1216 + private transient long cacheYear;
1.1217 + private transient long cacheStart;
1.1218 + private transient long cacheEnd;
1.1219 +
1.1220 + /**
1.1221 + * Constants specifying values of startMode and endMode.
1.1222 + */
1.1223 + private static final int DOM_MODE = 1; // Exact day of month, "Mar 1"
1.1224 + private static final int DOW_IN_MONTH_MODE = 2; // Day of week in month, "lastSun"
1.1225 + private static final int DOW_GE_DOM_MODE = 3; // Day of week after day of month, "Sun>=15"
1.1226 + private static final int DOW_LE_DOM_MODE = 4; // Day of week before day of month, "Sun<=21"
1.1227 +
1.1228 + /**
1.1229 + * Constant for a mode of start or end time specified as wall clock
1.1230 + * time. Wall clock time is standard time for the onset rule, and
1.1231 + * daylight time for the end rule.
1.1232 + * @since 1.4
1.1233 + */
1.1234 + public static final int WALL_TIME = 0; // Zero for backward compatibility
1.1235 +
1.1236 + /**
1.1237 + * Constant for a mode of start or end time specified as standard time.
1.1238 + * @since 1.4
1.1239 + */
1.1240 + public static final int STANDARD_TIME = 1;
1.1241 +
1.1242 + /**
1.1243 + * Constant for a mode of start or end time specified as UTC. European
1.1244 + * Union rules are specified as UTC time, for example.
1.1245 + * @since 1.4
1.1246 + */
1.1247 + public static final int UTC_TIME = 2;
1.1248 +
1.1249 + // Proclaim compatibility with 1.1
1.1250 + static final long serialVersionUID = -403250971215465050L;
1.1251 +
1.1252 + // the internal serial version which says which version was written
1.1253 + // - 0 (default) for version up to JDK 1.1.3
1.1254 + // - 1 for version from JDK 1.1.4, which includes 3 new fields
1.1255 + // - 2 for JDK 1.3, which includes 2 new fields
1.1256 + static final int currentSerialVersion = 2;
1.1257 +
1.1258 + /**
1.1259 + * The version of the serialized data on the stream. Possible values:
1.1260 + * <dl>
1.1261 + * <dt><b>0</b> or not present on stream</dt>
1.1262 + * <dd>
1.1263 + * JDK 1.1.3 or earlier.
1.1264 + * </dd>
1.1265 + * <dt><b>1</b></dt>
1.1266 + * <dd>
1.1267 + * JDK 1.1.4 or later. Includes three new fields: <code>startMode</code>,
1.1268 + * <code>endMode</code>, and <code>dstSavings</code>.
1.1269 + * </dd>
1.1270 + * <dt><b>2</b></dt>
1.1271 + * <dd>
1.1272 + * JDK 1.3 or later. Includes two new fields: <code>startTimeMode</code>
1.1273 + * and <code>endTimeMode</code>.
1.1274 + * </dd>
1.1275 + * </dl>
1.1276 + * When streaming out this class, the most recent format
1.1277 + * and the highest allowable <code>serialVersionOnStream</code>
1.1278 + * is written.
1.1279 + * @serial
1.1280 + * @since 1.1.4
1.1281 + */
1.1282 + private int serialVersionOnStream = currentSerialVersion;
1.1283 +
1.1284 + synchronized private void invalidateCache() {
1.1285 + cacheYear = startYear - 1;
1.1286 + cacheStart = cacheEnd = 0;
1.1287 + }
1.1288 +
1.1289 + //----------------------------------------------------------------------
1.1290 + // Rule representation
1.1291 + //
1.1292 + // We represent the following flavors of rules:
1.1293 + // 5 the fifth of the month
1.1294 + // lastSun the last Sunday in the month
1.1295 + // lastMon the last Monday in the month
1.1296 + // Sun>=8 first Sunday on or after the eighth
1.1297 + // Sun<=25 last Sunday on or before the 25th
1.1298 + // This is further complicated by the fact that we need to remain
1.1299 + // backward compatible with the 1.1 FCS. Finally, we need to minimize
1.1300 + // API changes. In order to satisfy these requirements, we support
1.1301 + // three representation systems, and we translate between them.
1.1302 + //
1.1303 + // INTERNAL REPRESENTATION
1.1304 + // This is the format SimpleTimeZone objects take after construction or
1.1305 + // streaming in is complete. Rules are represented directly, using an
1.1306 + // unencoded format. We will discuss the start rule only below; the end
1.1307 + // rule is analogous.
1.1308 + // startMode Takes on enumerated values DAY_OF_MONTH,
1.1309 + // DOW_IN_MONTH, DOW_AFTER_DOM, or DOW_BEFORE_DOM.
1.1310 + // startDay The day of the month, or for DOW_IN_MONTH mode, a
1.1311 + // value indicating which DOW, such as +1 for first,
1.1312 + // +2 for second, -1 for last, etc.
1.1313 + // startDayOfWeek The day of the week. Ignored for DAY_OF_MONTH.
1.1314 + //
1.1315 + // ENCODED REPRESENTATION
1.1316 + // This is the format accepted by the constructor and by setStartRule()
1.1317 + // and setEndRule(). It uses various combinations of positive, negative,
1.1318 + // and zero values to encode the different rules. This representation
1.1319 + // allows us to specify all the different rule flavors without altering
1.1320 + // the API.
1.1321 + // MODE startMonth startDay startDayOfWeek
1.1322 + // DOW_IN_MONTH_MODE >=0 !=0 >0
1.1323 + // DOM_MODE >=0 >0 ==0
1.1324 + // DOW_GE_DOM_MODE >=0 >0 <0
1.1325 + // DOW_LE_DOM_MODE >=0 <0 <0
1.1326 + // (no DST) don't care ==0 don't care
1.1327 + //
1.1328 + // STREAMED REPRESENTATION
1.1329 + // We must retain binary compatibility with the 1.1 FCS. The 1.1 code only
1.1330 + // handles DOW_IN_MONTH_MODE and non-DST mode, the latter indicated by the
1.1331 + // flag useDaylight. When we stream an object out, we translate into an
1.1332 + // approximate DOW_IN_MONTH_MODE representation so the object can be parsed
1.1333 + // and used by 1.1 code. Following that, we write out the full
1.1334 + // representation separately so that contemporary code can recognize and
1.1335 + // parse it. The full representation is written in a "packed" format,
1.1336 + // consisting of a version number, a length, and an array of bytes. Future
1.1337 + // versions of this class may specify different versions. If they wish to
1.1338 + // include additional data, they should do so by storing them after the
1.1339 + // packed representation below.
1.1340 + //----------------------------------------------------------------------
1.1341 +
1.1342 + /**
1.1343 + * Given a set of encoded rules in startDay and startDayOfMonth, decode
1.1344 + * them and set the startMode appropriately. Do the same for endDay and
1.1345 + * endDayOfMonth. Upon entry, the day of week variables may be zero or
1.1346 + * negative, in order to indicate special modes. The day of month
1.1347 + * variables may also be negative. Upon exit, the mode variables will be
1.1348 + * set, and the day of week and day of month variables will be positive.
1.1349 + * This method also recognizes a startDay or endDay of zero as indicating
1.1350 + * no DST.
1.1351 + */
1.1352 + private void decodeRules()
1.1353 + {
1.1354 + decodeStartRule();
1.1355 + decodeEndRule();
1.1356 + }
1.1357 +
1.1358 + /**
1.1359 + * Decode the start rule and validate the parameters. The parameters are
1.1360 + * expected to be in encoded form, which represents the various rule modes
1.1361 + * by negating or zeroing certain values. Representation formats are:
1.1362 + * <p>
1.1363 + * <pre>
1.1364 + * DOW_IN_MONTH DOM DOW>=DOM DOW<=DOM no DST
1.1365 + * ------------ ----- -------- -------- ----------
1.1366 + * month 0..11 same same same don't care
1.1367 + * day -5..5 1..31 1..31 -1..-31 0
1.1368 + * dayOfWeek 1..7 0 -1..-7 -1..-7 don't care
1.1369 + * time 0..ONEDAY same same same don't care
1.1370 + * </pre>
1.1371 + * The range for month does not include UNDECIMBER since this class is
1.1372 + * really specific to GregorianCalendar, which does not use that month.
1.1373 + * The range for time includes ONEDAY (vs. ending at ONEDAY-1) because the
1.1374 + * end rule is an exclusive limit point. That is, the range of times that
1.1375 + * are in DST include those >= the start and < the end. For this reason,
1.1376 + * it should be possible to specify an end of ONEDAY in order to include the
1.1377 + * entire day. Although this is equivalent to time 0 of the following day,
1.1378 + * it's not always possible to specify that, for example, on December 31.
1.1379 + * While arguably the start range should still be 0..ONEDAY-1, we keep
1.1380 + * the start and end ranges the same for consistency.
1.1381 + */
1.1382 + private void decodeStartRule() {
1.1383 + useDaylight = (startDay != 0) && (endDay != 0);
1.1384 + if (startDay != 0) {
1.1385 + if (startMonth < Calendar.JANUARY || startMonth > Calendar.DECEMBER) {
1.1386 + throw new IllegalArgumentException(
1.1387 + "Illegal start month " + startMonth);
1.1388 + }
1.1389 + if (startTime < 0 || startTime > millisPerDay) {
1.1390 + throw new IllegalArgumentException(
1.1391 + "Illegal start time " + startTime);
1.1392 + }
1.1393 + if (startDayOfWeek == 0) {
1.1394 + startMode = DOM_MODE;
1.1395 + } else {
1.1396 + if (startDayOfWeek > 0) {
1.1397 + startMode = DOW_IN_MONTH_MODE;
1.1398 + } else {
1.1399 + startDayOfWeek = -startDayOfWeek;
1.1400 + if (startDay > 0) {
1.1401 + startMode = DOW_GE_DOM_MODE;
1.1402 + } else {
1.1403 + startDay = -startDay;
1.1404 + startMode = DOW_LE_DOM_MODE;
1.1405 + }
1.1406 + }
1.1407 + if (startDayOfWeek > Calendar.SATURDAY) {
1.1408 + throw new IllegalArgumentException(
1.1409 + "Illegal start day of week " + startDayOfWeek);
1.1410 + }
1.1411 + }
1.1412 + if (startMode == DOW_IN_MONTH_MODE) {
1.1413 + if (startDay < -5 || startDay > 5) {
1.1414 + throw new IllegalArgumentException(
1.1415 + "Illegal start day of week in month " + startDay);
1.1416 + }
1.1417 + } else if (startDay < 1 || startDay > staticMonthLength[startMonth]) {
1.1418 + throw new IllegalArgumentException(
1.1419 + "Illegal start day " + startDay);
1.1420 + }
1.1421 + }
1.1422 + }
1.1423 +
1.1424 + /**
1.1425 + * Decode the end rule and validate the parameters. This method is exactly
1.1426 + * analogous to decodeStartRule().
1.1427 + * @see decodeStartRule
1.1428 + */
1.1429 + private void decodeEndRule() {
1.1430 + useDaylight = (startDay != 0) && (endDay != 0);
1.1431 + if (endDay != 0) {
1.1432 + if (endMonth < Calendar.JANUARY || endMonth > Calendar.DECEMBER) {
1.1433 + throw new IllegalArgumentException(
1.1434 + "Illegal end month " + endMonth);
1.1435 + }
1.1436 + if (endTime < 0 || endTime > millisPerDay) {
1.1437 + throw new IllegalArgumentException(
1.1438 + "Illegal end time " + endTime);
1.1439 + }
1.1440 + if (endDayOfWeek == 0) {
1.1441 + endMode = DOM_MODE;
1.1442 + } else {
1.1443 + if (endDayOfWeek > 0) {
1.1444 + endMode = DOW_IN_MONTH_MODE;
1.1445 + } else {
1.1446 + endDayOfWeek = -endDayOfWeek;
1.1447 + if (endDay > 0) {
1.1448 + endMode = DOW_GE_DOM_MODE;
1.1449 + } else {
1.1450 + endDay = -endDay;
1.1451 + endMode = DOW_LE_DOM_MODE;
1.1452 + }
1.1453 + }
1.1454 + if (endDayOfWeek > Calendar.SATURDAY) {
1.1455 + throw new IllegalArgumentException(
1.1456 + "Illegal end day of week " + endDayOfWeek);
1.1457 + }
1.1458 + }
1.1459 + if (endMode == DOW_IN_MONTH_MODE) {
1.1460 + if (endDay < -5 || endDay > 5) {
1.1461 + throw new IllegalArgumentException(
1.1462 + "Illegal end day of week in month " + endDay);
1.1463 + }
1.1464 + } else if (endDay < 1 || endDay > staticMonthLength[endMonth]) {
1.1465 + throw new IllegalArgumentException(
1.1466 + "Illegal end day " + endDay);
1.1467 + }
1.1468 + }
1.1469 + }
1.1470 +
1.1471 + /**
1.1472 + * Make rules compatible to 1.1 FCS code. Since 1.1 FCS code only understands
1.1473 + * day-of-week-in-month rules, we must modify other modes of rules to their
1.1474 + * approximate equivalent in 1.1 FCS terms. This method is used when streaming
1.1475 + * out objects of this class. After it is called, the rules will be modified,
1.1476 + * with a possible loss of information. startMode and endMode will NOT be
1.1477 + * altered, even though semantically they should be set to DOW_IN_MONTH_MODE,
1.1478 + * since the rule modification is only intended to be temporary.
1.1479 + */
1.1480 + private void makeRulesCompatible()
1.1481 + {
1.1482 + switch (startMode) {
1.1483 + case DOM_MODE:
1.1484 + startDay = 1 + (startDay / 7);
1.1485 + startDayOfWeek = Calendar.SUNDAY;
1.1486 + break;
1.1487 +
1.1488 + case DOW_GE_DOM_MODE:
1.1489 + // A day-of-month of 1 is equivalent to DOW_IN_MONTH_MODE
1.1490 + // that is, Sun>=1 == firstSun.
1.1491 + if (startDay != 1) {
1.1492 + startDay = 1 + (startDay / 7);
1.1493 + }
1.1494 + break;
1.1495 +
1.1496 + case DOW_LE_DOM_MODE:
1.1497 + if (startDay >= 30) {
1.1498 + startDay = -1;
1.1499 + } else {
1.1500 + startDay = 1 + (startDay / 7);
1.1501 + }
1.1502 + break;
1.1503 + }
1.1504 +
1.1505 + switch (endMode) {
1.1506 + case DOM_MODE:
1.1507 + endDay = 1 + (endDay / 7);
1.1508 + endDayOfWeek = Calendar.SUNDAY;
1.1509 + break;
1.1510 +
1.1511 + case DOW_GE_DOM_MODE:
1.1512 + // A day-of-month of 1 is equivalent to DOW_IN_MONTH_MODE
1.1513 + // that is, Sun>=1 == firstSun.
1.1514 + if (endDay != 1) {
1.1515 + endDay = 1 + (endDay / 7);
1.1516 + }
1.1517 + break;
1.1518 +
1.1519 + case DOW_LE_DOM_MODE:
1.1520 + if (endDay >= 30) {
1.1521 + endDay = -1;
1.1522 + } else {
1.1523 + endDay = 1 + (endDay / 7);
1.1524 + }
1.1525 + break;
1.1526 + }
1.1527 +
1.1528 + /*
1.1529 + * Adjust the start and end times to wall time. This works perfectly
1.1530 + * well unless it pushes into the next or previous day. If that
1.1531 + * happens, we attempt to adjust the day rule somewhat crudely. The day
1.1532 + * rules have been forced into DOW_IN_MONTH mode already, so we change
1.1533 + * the day of week to move forward or back by a day. It's possible to
1.1534 + * make a more refined adjustment of the original rules first, but in
1.1535 + * most cases this extra effort will go to waste once we adjust the day
1.1536 + * rules anyway.
1.1537 + */
1.1538 + switch (startTimeMode) {
1.1539 + case UTC_TIME:
1.1540 + startTime += rawOffset;
1.1541 + break;
1.1542 + }
1.1543 + while (startTime < 0) {
1.1544 + startTime += millisPerDay;
1.1545 + startDayOfWeek = 1 + ((startDayOfWeek+5) % 7); // Back 1 day
1.1546 + }
1.1547 + while (startTime >= millisPerDay) {
1.1548 + startTime -= millisPerDay;
1.1549 + startDayOfWeek = 1 + (startDayOfWeek % 7); // Forward 1 day
1.1550 + }
1.1551 +
1.1552 + switch (endTimeMode) {
1.1553 + case UTC_TIME:
1.1554 + endTime += rawOffset + dstSavings;
1.1555 + break;
1.1556 + case STANDARD_TIME:
1.1557 + endTime += dstSavings;
1.1558 + }
1.1559 + while (endTime < 0) {
1.1560 + endTime += millisPerDay;
1.1561 + endDayOfWeek = 1 + ((endDayOfWeek+5) % 7); // Back 1 day
1.1562 + }
1.1563 + while (endTime >= millisPerDay) {
1.1564 + endTime -= millisPerDay;
1.1565 + endDayOfWeek = 1 + (endDayOfWeek % 7); // Forward 1 day
1.1566 + }
1.1567 + }
1.1568 +
1.1569 + /**
1.1570 + * Pack the start and end rules into an array of bytes. Only pack
1.1571 + * data which is not preserved by makeRulesCompatible.
1.1572 + */
1.1573 + private byte[] packRules()
1.1574 + {
1.1575 + byte[] rules = new byte[6];
1.1576 + rules[0] = (byte)startDay;
1.1577 + rules[1] = (byte)startDayOfWeek;
1.1578 + rules[2] = (byte)endDay;
1.1579 + rules[3] = (byte)endDayOfWeek;
1.1580 +
1.1581 + // As of serial version 2, include time modes
1.1582 + rules[4] = (byte)startTimeMode;
1.1583 + rules[5] = (byte)endTimeMode;
1.1584 +
1.1585 + return rules;
1.1586 + }
1.1587 +
1.1588 + /**
1.1589 + * Given an array of bytes produced by packRules, interpret them
1.1590 + * as the start and end rules.
1.1591 + */
1.1592 + private void unpackRules(byte[] rules)
1.1593 + {
1.1594 + startDay = rules[0];
1.1595 + startDayOfWeek = rules[1];
1.1596 + endDay = rules[2];
1.1597 + endDayOfWeek = rules[3];
1.1598 +
1.1599 + // As of serial version 2, include time modes
1.1600 + if (rules.length >= 6) {
1.1601 + startTimeMode = rules[4];
1.1602 + endTimeMode = rules[5];
1.1603 + }
1.1604 + }
1.1605 +
1.1606 + /**
1.1607 + * Pack the start and end times into an array of bytes. This is required
1.1608 + * as of serial version 2.
1.1609 + */
1.1610 + private int[] packTimes() {
1.1611 + int[] times = new int[2];
1.1612 + times[0] = startTime;
1.1613 + times[1] = endTime;
1.1614 + return times;
1.1615 + }
1.1616 +
1.1617 + /**
1.1618 + * Unpack the start and end times from an array of bytes. This is required
1.1619 + * as of serial version 2.
1.1620 + */
1.1621 + private void unpackTimes(int[] times) {
1.1622 + startTime = times[0];
1.1623 + endTime = times[1];
1.1624 + }
1.1625 +
1.1626 + /**
1.1627 + * Save the state of this object to a stream (i.e., serialize it).
1.1628 + *
1.1629 + * @serialData We write out two formats, a JDK 1.1 compatible format, using
1.1630 + * <code>DOW_IN_MONTH_MODE</code> rules, in the required section, followed
1.1631 + * by the full rules, in packed format, in the optional section. The
1.1632 + * optional section will be ignored by JDK 1.1 code upon stream in.
1.1633 + * <p> Contents of the optional section: The length of a byte array is
1.1634 + * emitted (int); this is 4 as of this release. The byte array of the given
1.1635 + * length is emitted. The contents of the byte array are the true values of
1.1636 + * the fields <code>startDay</code>, <code>startDayOfWeek</code>,
1.1637 + * <code>endDay</code>, and <code>endDayOfWeek</code>. The values of these
1.1638 + * fields in the required section are approximate values suited to the rule
1.1639 + * mode <code>DOW_IN_MONTH_MODE</code>, which is the only mode recognized by
1.1640 + * JDK 1.1.
1.1641 + */
1.1642 + private void writeObject(ObjectOutputStream stream)
1.1643 + throws IOException
1.1644 + {
1.1645 + // Construct a binary rule
1.1646 + byte[] rules = packRules();
1.1647 + int[] times = packTimes();
1.1648 +
1.1649 + // Convert to 1.1 FCS rules. This step may cause us to lose information.
1.1650 + makeRulesCompatible();
1.1651 +
1.1652 + // Write out the 1.1 FCS rules
1.1653 + stream.defaultWriteObject();
1.1654 +
1.1655 + // Write out the binary rules in the optional data area of the stream.
1.1656 + stream.writeInt(rules.length);
1.1657 + stream.write(rules);
1.1658 + stream.writeObject(times);
1.1659 +
1.1660 + // Recover the original rules. This recovers the information lost
1.1661 + // by makeRulesCompatible.
1.1662 + unpackRules(rules);
1.1663 + unpackTimes(times);
1.1664 + }
1.1665 +
1.1666 + /**
1.1667 + * Reconstitute this object from a stream (i.e., deserialize it).
1.1668 + *
1.1669 + * We handle both JDK 1.1
1.1670 + * binary formats and full formats with a packed byte array.
1.1671 + */
1.1672 + private void readObject(ObjectInputStream stream)
1.1673 + throws IOException, ClassNotFoundException
1.1674 + {
1.1675 + stream.defaultReadObject();
1.1676 +
1.1677 + if (serialVersionOnStream < 1) {
1.1678 + // Fix a bug in the 1.1 SimpleTimeZone code -- namely,
1.1679 + // startDayOfWeek and endDayOfWeek were usually uninitialized. We can't do
1.1680 + // too much, so we assume SUNDAY, which actually works most of the time.
1.1681 + if (startDayOfWeek == 0) {
1.1682 + startDayOfWeek = Calendar.SUNDAY;
1.1683 + }
1.1684 + if (endDayOfWeek == 0) {
1.1685 + endDayOfWeek = Calendar.SUNDAY;
1.1686 + }
1.1687 +
1.1688 + // The variables dstSavings, startMode, and endMode are post-1.1, so they
1.1689 + // won't be present if we're reading from a 1.1 stream. Fix them up.
1.1690 + startMode = endMode = DOW_IN_MONTH_MODE;
1.1691 + dstSavings = millisPerHour;
1.1692 + } else {
1.1693 + // For 1.1.4, in addition to the 3 new instance variables, we also
1.1694 + // store the actual rules (which have not be made compatible with 1.1)
1.1695 + // in the optional area. Read them in here and parse them.
1.1696 + int length = stream.readInt();
1.1697 + byte[] rules = new byte[length];
1.1698 + stream.readFully(rules);
1.1699 + unpackRules(rules);
1.1700 + }
1.1701 +
1.1702 + if (serialVersionOnStream >= 2) {
1.1703 + int[] times = (int[]) stream.readObject();
1.1704 + unpackTimes(times);
1.1705 + }
1.1706 +
1.1707 + serialVersionOnStream = currentSerialVersion;
1.1708 + }
1.1709 +}