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jlechner |
/* java.util.SimpleTimeZone
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Copyright (C) 1998, 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.util;
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/**
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* This class represents a simple time zone offset and handles
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* daylight savings. It can only handle one daylight savings rule, so
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* it can't represent historical changes.
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*
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* This object is tightly bound to the Gregorian calendar. It assumes
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* a regular seven days week, and the month lengths are that of the
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* Gregorian Calendar. It can only handle daylight savings for years
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* lying in the AD era.
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*
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* @see Calendar
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* @see GregorianCalendar
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* @author Jochen Hoenicke
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*/
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public class SimpleTimeZone extends TimeZone
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{
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/**
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* The raw time zone offset in milliseconds to GMT, ignoring
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* daylight savings.
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* @serial
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*/
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private int rawOffset;
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/**
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* True, if this timezone uses daylight savings, false otherwise.
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* @serial
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*/
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private boolean useDaylight;
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/**
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* The daylight savings offset. This is a positive offset in
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* milliseconds with respect to standard time. Typically this
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* is one hour, but for some time zones this may be half an hour.
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* @serial
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* @since JDK1.1.4
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*/
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private int dstSavings = 60 * 60 * 1000;
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/**
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* The first year, in which daylight savings rules applies.
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* @serial
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*/
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private int startYear;
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private static final int DOM_MODE = 1;
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private static final int DOW_IN_MONTH_MODE = 2;
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private static final int DOW_GE_DOM_MODE = 3;
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private static final int DOW_LE_DOM_MODE = 4;
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/**
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* The mode of the start rule. This takes one of the following values:
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* <dl>
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* <dt>DOM_MODE (1)</dt>
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* <dd> startDay contains the day in month of the start date,
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* startDayOfWeek is unused. </dd>
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* <dt>DOW_IN_MONTH_MODE (2)</dt>
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* <dd> The startDay gives the day of week in month, and
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* startDayOfWeek the day of week. For example startDay=2 and
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* startDayOfWeek=Calender.SUNDAY specifies that the change is on
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* the second sunday in that month. You must make sure, that this
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* day always exists (ie. don't specify the 5th sunday).
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* </dd>
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* <dt>DOW_GE_DOM_MODE (3)</dt>
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* <dd> The start is on the first startDayOfWeek on or after
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* startDay. For example startDay=13 and
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* startDayOfWeek=Calendar.FRIDAY specifies that the daylight
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* savings start on the first FRIDAY on or after the 13th of that
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* Month. Make sure that the change is always in the given month, or
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* the result is undefined.
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* </dd>
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* <dt>DOW_LE_DOM_MONTH (4)</dt>
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* <dd> The start is on the first startDayOfWeek on or before the
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* startDay. Make sure that the change is always in the given
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* month, or the result is undefined.
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</dd>
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* </dl>
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* @serial */
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private int startMode;
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/**
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* The month in which daylight savings start. This is one of the
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* constants Calendar.JANUARY, ..., Calendar.DECEMBER.
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* @serial
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*/
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private int startMonth;
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/**
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* This variable can have different meanings. See startMode for details
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* @see #startMode
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* @serial
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*/
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private int startDay;
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/**
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* This variable specifies the day of week the change takes place. If
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* startMode == DOM_MODE, this is undefined.
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* @serial
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* @see #startMode
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*/
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private int startDayOfWeek;
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/**
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* This variable specifies the time of change to daylight savings.
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* This time is given in milliseconds after midnight local
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* standard time.
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* @serial
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*/
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private int startTime;
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/**
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* This variable specifies the mode that startTime is specified in. By
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* default it is WALL_TIME, but can also be STANDARD_TIME or UTC_TIME. For
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* startTime, STANDARD_TIME and WALL_TIME are equivalent.
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* @serial
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*/
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private int startTimeMode = WALL_TIME;
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/**
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* The month in which daylight savings ends. This is one of the
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* constants Calendar.JANUARY, ..., Calendar.DECEMBER.
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* @serial
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*/
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private int endMonth;
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/**
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* This variable gives the mode for the end of daylight savings rule.
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* It can take the same values as startMode.
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* @serial
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* @see #startMode
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*/
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private int endMode;
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/**
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* This variable can have different meanings. See startMode for details
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* @serial
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* @see #startMode
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*/
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private int endDay;
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/**
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* This variable specifies the day of week the change takes place. If
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* endMode == DOM_MODE, this is undefined.
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* @serial
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* @see #startMode
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*/
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private int endDayOfWeek;
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/**
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* This variable specifies the time of change back to standard time.
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* This time is given in milliseconds after midnight local
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* standard time.
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* @serial
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*/
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private int endTime;
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/**
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* This variable specifies the mode that endTime is specified in. By
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* default it is WALL_TIME, but can also be STANDARD_TIME or UTC_TIME.
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* @serial
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*/
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private int endTimeMode = WALL_TIME;
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/**
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* This variable points to a deprecated array from JDK 1.1. It is
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* ignored in JDK 1.2 but streamed out for compatibility with JDK 1.1.
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* The array contains the lengths of the months in the year and is
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* assigned from a private static final field to avoid allocating
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* the array for every instance of the object.
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* Note that static final fields are not serialized.
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* @serial
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*/
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private byte[] monthLength = monthArr;
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private static final byte[] monthArr =
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{
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31, 28, 31, 30, 31, 30, 31, 31, 30,
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31, 30, 31
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};
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/**
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* The version of the serialized data on the stream.
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* <dl>
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* <dt>0 or not present on stream</dt>
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* <dd> JDK 1.1.3 or earlier, only provides this fields:
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* rawOffset, startDay, startDayOfWeek, startMonth, startTime,
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* startYear, endDay, endDayOfWeek, endMonth, endTime
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* </dd>
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* <dd> JDK 1.1.4 or later. This includes three new fields, namely
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* startMode, endMode and dstSavings. And there is a optional section
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* as described in writeObject.
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* </dd>
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* </dl>
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*
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* XXX - JDK 1.2 Beta 4 docu states 1.1.4, but my 1.1.5 has the old
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* version.
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*
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* When streaming out this class it is always written in the latest
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* version.
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* @serial
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* @since JDK1.1.4
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*/
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private int serialVersionOnStream = 2;
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private static final long serialVersionUID = -403250971215465050L;
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/**
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* Constant to indicate that start and end times are specified in standard
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* time, without adjusting for daylight savings.
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*/
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public static final int STANDARD_TIME = 1;
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/**
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* Constant to indicate that start and end times are specified in wall
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* time, adjusting for daylight savings. This is the default.
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*/
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public static final int WALL_TIME = 0;
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/**
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* Constant to indicate that start and end times are specified in UTC.
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*/
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public static final int UTC_TIME = 2;
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/**
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* Create a <code>SimpleTimeZone</code> with the given time offset
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* from GMT and without daylight savings.
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* @param rawOffset the time offset from GMT in milliseconds.
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* @param id The identifier of this time zone.
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*/
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public SimpleTimeZone(int rawOffset, String id)
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{
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this.rawOffset = rawOffset;
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setID(id);
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useDaylight = false;
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startYear = 0;
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}
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/**
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* Create a <code>SimpleTimeZone</code> with the given time offset
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* from GMT and with daylight savings. The start/end parameters
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* can have different meaning (replace WEEKDAY with a real day of
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* week). Only the first two meanings were supported by earlier
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* versions of jdk.
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*
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* <dl>
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* <dt><code>day > 0, dayOfWeek = Calendar.WEEKDAY</code></dt>
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* <dd>The start/end of daylight savings is on the <code>day</code>-th
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* <code>WEEKDAY</code> in the given month. </dd>
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* <dt><code>day < 0, dayOfWeek = Calendar.WEEKDAY</code></dt>
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* <dd>The start/end of daylight savings is on the <code>-day</code>-th
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* <code>WEEKDAY</code> counted from the <i>end</i> of the month. </dd>
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* <dt><code>day > 0, dayOfWeek = 0</code></dt>
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* <dd>The start/end of daylight is on the <code>day</code>-th day of
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* the month. </dd>
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* <dt><code>day > 0, dayOfWeek = -Calendar.WEEKDAY</code></dt>
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* <dd>The start/end of daylight is on the first WEEKDAY on or after
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* the <code>day</code>-th day of the month. You must make sure that
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* this day lies in the same month. </dd>
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* <dt><code>day < 0, dayOfWeek = -Calendar.WEEKDAY</code></dt>
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* <dd>The start/end of daylight is on the first WEEKDAY on or
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* <i>before</i> the <code>-day</code>-th day of the month. You
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* must make sure that this day lies in the same month. </dd>
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* </dl>
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*
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* If you give a non existing month, a day that is zero, or too big,
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* or a dayOfWeek that is too big, the result is undefined.
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*
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* The start rule must have a different month than the end rule.
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* This restriction shouldn't hurt for all possible time zones.
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*
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* @param rawOffset The time offset from GMT in milliseconds.
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* @param id The identifier of this time zone.
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* @param startMonth The start month of daylight savings; use the
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* constants in Calendar.
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* @param startDayOfWeekInMonth A day in month or a day of week number, as
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* described above.
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* @param startDayOfWeek The start rule day of week; see above.
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* @param startTime A time in millis in standard time.
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* @param endMonth The end month of daylight savings; use the
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* constants in Calendar.
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* @param endDayOfWeekInMonth A day in month or a day of week number, as
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* described above.
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* @param endDayOfWeek The end rule day of week; see above.
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* @param endTime A time in millis in standard time.
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* @throws IllegalArgumentException if parameters are invalid or out of
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* range.
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*/
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public SimpleTimeZone(int rawOffset, String id, int startMonth,
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int startDayOfWeekInMonth, int startDayOfWeek,
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int startTime, int endMonth, int endDayOfWeekInMonth,
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int endDayOfWeek, int endTime)
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{
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this.rawOffset = rawOffset;
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setID(id);
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useDaylight = true;
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setStartRule(startMonth, startDayOfWeekInMonth, startDayOfWeek, startTime);
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setEndRule(endMonth, endDayOfWeekInMonth, endDayOfWeek, endTime);
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if (startMonth == endMonth)
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throw new IllegalArgumentException("startMonth and endMonth must be different");
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this.startYear = 0;
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}
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/**
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* This constructs a new SimpleTimeZone that supports a daylight savings
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* rule. The parameter are the same as for the constructor above, except
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* there is the additional dstSavaings parameter.
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*
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* @param dstSavings the amount of savings for daylight savings
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* time in milliseconds. This must be positive.
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* @since 1.2
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*/
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public SimpleTimeZone(int rawOffset, String id, int startMonth,
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int startDayOfWeekInMonth, int startDayOfWeek,
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|
int startTime, int endMonth, int endDayOfWeekInMonth,
|
353 |
|
|
int endDayOfWeek, int endTime, int dstSavings)
|
354 |
|
|
{
|
355 |
|
|
this(rawOffset, id, startMonth, startDayOfWeekInMonth, startDayOfWeek,
|
356 |
|
|
startTime, endMonth, endDayOfWeekInMonth, endDayOfWeek, endTime);
|
357 |
|
|
|
358 |
|
|
this.dstSavings = dstSavings;
|
359 |
|
|
}
|
360 |
|
|
|
361 |
|
|
/**
|
362 |
|
|
* This constructs a new SimpleTimeZone that supports a daylight savings
|
363 |
|
|
* rule. The parameter are the same as for the constructor above, except
|
364 |
|
|
* there are the additional startTimeMode, endTimeMode, and dstSavings
|
365 |
|
|
* parameters.
|
366 |
|
|
*
|
367 |
|
|
* @param startTimeMode the mode that start times are specified in. One of
|
368 |
|
|
* WALL_TIME, STANDARD_TIME, or UTC_TIME.
|
369 |
|
|
* @param endTimeMode the mode that end times are specified in. One of
|
370 |
|
|
* WALL_TIME, STANDARD_TIME, or UTC_TIME.
|
371 |
|
|
* @param dstSavings the amount of savings for daylight savings
|
372 |
|
|
* time in milliseconds. This must be positive.
|
373 |
|
|
* @throws IllegalArgumentException if parameters are invalid or out of
|
374 |
|
|
* range.
|
375 |
|
|
* @since 1.4
|
376 |
|
|
*/
|
377 |
|
|
public SimpleTimeZone(int rawOffset, String id, int startMonth,
|
378 |
|
|
int startDayOfWeekInMonth, int startDayOfWeek,
|
379 |
|
|
int startTime, int startTimeMode, int endMonth,
|
380 |
|
|
int endDayOfWeekInMonth, int endDayOfWeek,
|
381 |
|
|
int endTime, int endTimeMode, int dstSavings)
|
382 |
|
|
{
|
383 |
|
|
this.rawOffset = rawOffset;
|
384 |
|
|
setID(id);
|
385 |
|
|
useDaylight = true;
|
386 |
|
|
|
387 |
|
|
if (startTimeMode < WALL_TIME || startTimeMode > UTC_TIME)
|
388 |
|
|
throw new IllegalArgumentException("startTimeMode must be one of WALL_TIME, STANDARD_TIME, or UTC_TIME");
|
389 |
|
|
if (endTimeMode < WALL_TIME || endTimeMode > UTC_TIME)
|
390 |
|
|
throw new IllegalArgumentException("endTimeMode must be one of WALL_TIME, STANDARD_TIME, or UTC_TIME");
|
391 |
|
|
this.startTimeMode = startTimeMode;
|
392 |
|
|
this.endTimeMode = endTimeMode;
|
393 |
|
|
|
394 |
|
|
setStartRule(startMonth, startDayOfWeekInMonth, startDayOfWeek, startTime);
|
395 |
|
|
setEndRule(endMonth, endDayOfWeekInMonth, endDayOfWeek, endTime);
|
396 |
|
|
if (startMonth == endMonth)
|
397 |
|
|
throw new IllegalArgumentException("startMonth and endMonth must be different");
|
398 |
|
|
this.startYear = 0;
|
399 |
|
|
|
400 |
|
|
this.dstSavings = dstSavings;
|
401 |
|
|
}
|
402 |
|
|
|
403 |
|
|
/**
|
404 |
|
|
* Sets the first year, where daylight savings applies. The daylight
|
405 |
|
|
* savings rule never apply for years in the BC era. Note that this
|
406 |
|
|
* is gregorian calendar specific.
|
407 |
|
|
* @param year the start year.
|
408 |
|
|
*/
|
409 |
|
|
public void setStartYear(int year)
|
410 |
|
|
{
|
411 |
|
|
startYear = year;
|
412 |
|
|
useDaylight = true;
|
413 |
|
|
}
|
414 |
|
|
|
415 |
|
|
/**
|
416 |
|
|
* Checks if the month, day, dayOfWeek arguments are in range and
|
417 |
|
|
* returns the mode of the rule.
|
418 |
|
|
* @param month the month parameter as in the constructor
|
419 |
|
|
* @param day the day parameter as in the constructor
|
420 |
|
|
* @param dayOfWeek the day of week parameter as in the constructor
|
421 |
|
|
* @return the mode of this rule see startMode.
|
422 |
|
|
* @exception IllegalArgumentException if parameters are out of range.
|
423 |
|
|
* @see #SimpleTimeZone(int, String, int, int, int, int, int, int, int, int)
|
424 |
|
|
* @see #startMode
|
425 |
|
|
*/
|
426 |
|
|
private int checkRule(int month, int day, int dayOfWeek)
|
427 |
|
|
{
|
428 |
|
|
if (month < 0 || month > 11)
|
429 |
|
|
throw new IllegalArgumentException("month out of range");
|
430 |
|
|
|
431 |
|
|
int daysInMonth = getDaysInMonth(month, 1);
|
432 |
|
|
if (dayOfWeek == 0)
|
433 |
|
|
{
|
434 |
|
|
if (day <= 0 || day > daysInMonth)
|
435 |
|
|
throw new IllegalArgumentException("day out of range");
|
436 |
|
|
return DOM_MODE;
|
437 |
|
|
}
|
438 |
|
|
else if (dayOfWeek > 0)
|
439 |
|
|
{
|
440 |
|
|
if (Math.abs(day) > (daysInMonth + 6) / 7)
|
441 |
|
|
throw new IllegalArgumentException("dayOfWeekInMonth out of range");
|
442 |
|
|
if (dayOfWeek > Calendar.SATURDAY)
|
443 |
|
|
throw new IllegalArgumentException("dayOfWeek out of range");
|
444 |
|
|
return DOW_IN_MONTH_MODE;
|
445 |
|
|
}
|
446 |
|
|
else
|
447 |
|
|
{
|
448 |
|
|
if (day == 0 || Math.abs(day) > daysInMonth)
|
449 |
|
|
throw new IllegalArgumentException("day out of range");
|
450 |
|
|
if (dayOfWeek < -Calendar.SATURDAY)
|
451 |
|
|
throw new IllegalArgumentException("dayOfWeek out of range");
|
452 |
|
|
if (day < 0)
|
453 |
|
|
return DOW_LE_DOM_MODE;
|
454 |
|
|
else
|
455 |
|
|
return DOW_GE_DOM_MODE;
|
456 |
|
|
}
|
457 |
|
|
}
|
458 |
|
|
|
459 |
|
|
/**
|
460 |
|
|
* Sets the daylight savings start rule. You must also set the
|
461 |
|
|
* end rule with <code>setEndRule</code> or the result of
|
462 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
463 |
|
|
* constructor above.
|
464 |
|
|
*
|
465 |
|
|
* @param month The month where daylight savings start, zero
|
466 |
|
|
* based. You should use the constants in Calendar.
|
467 |
|
|
* @param day A day of month or day of week in month.
|
468 |
|
|
* @param dayOfWeek The day of week where daylight savings start.
|
469 |
|
|
* @param time The time in milliseconds standard time where daylight
|
470 |
|
|
* savings start.
|
471 |
|
|
* @exception IllegalArgumentException if parameters are out of range.
|
472 |
|
|
* @see SimpleTimeZone
|
473 |
|
|
*/
|
474 |
|
|
public void setStartRule(int month, int day, int dayOfWeek, int time)
|
475 |
|
|
{
|
476 |
|
|
this.startMode = checkRule(month, day, dayOfWeek);
|
477 |
|
|
this.startMonth = month;
|
478 |
|
|
this.startDay = day;
|
479 |
|
|
this.startDayOfWeek = Math.abs(dayOfWeek);
|
480 |
|
|
if (this.startTimeMode == WALL_TIME || this.startTimeMode == STANDARD_TIME)
|
481 |
|
|
this.startTime = time;
|
482 |
|
|
else
|
483 |
|
|
// Convert from UTC to STANDARD
|
484 |
|
|
this.startTime = time + this.rawOffset;
|
485 |
|
|
useDaylight = true;
|
486 |
|
|
}
|
487 |
|
|
|
488 |
|
|
/**
|
489 |
|
|
* Sets the daylight savings start rule. You must also set the
|
490 |
|
|
* end rule with <code>setEndRule</code> or the result of
|
491 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
492 |
|
|
* constructor above.
|
493 |
|
|
*
|
494 |
|
|
* Note that this API isn't incredibly well specified. It appears that the
|
495 |
|
|
* after flag must override the parameters, since normally, the day and
|
496 |
|
|
* dayofweek can select this. I.e., if day < 0 and dayOfWeek < 0, on or
|
497 |
|
|
* before mode is chosen. But if after == true, this implementation
|
498 |
|
|
* overrides the signs of the other arguments. And if dayOfWeek == 0, it
|
499 |
|
|
* falls back to the behavior in the other APIs. I guess this should be
|
500 |
|
|
* checked against Sun's implementation.
|
501 |
|
|
*
|
502 |
|
|
* @param month The month where daylight savings start, zero
|
503 |
|
|
* based. You should use the constants in Calendar.
|
504 |
|
|
* @param day A day of month or day of week in month.
|
505 |
|
|
* @param dayOfWeek The day of week where daylight savings start.
|
506 |
|
|
* @param time The time in milliseconds standard time where daylight
|
507 |
|
|
* savings start.
|
508 |
|
|
* @param after If true, day and dayOfWeek specify first day of week on or
|
509 |
|
|
* after day, else first day of week on or before.
|
510 |
|
|
* @since 1.2
|
511 |
|
|
* @see SimpleTimeZone
|
512 |
|
|
*/
|
513 |
|
|
public void setStartRule(int month, int day, int dayOfWeek, int time,
|
514 |
|
|
boolean after)
|
515 |
|
|
{
|
516 |
|
|
// FIXME: XXX: Validate that checkRule and offset processing work with on
|
517 |
|
|
// or before mode.
|
518 |
|
|
this.startDay = after ? Math.abs(day) : -Math.abs(day);
|
519 |
|
|
this.startDayOfWeek = after ? Math.abs(dayOfWeek) : -Math.abs(dayOfWeek);
|
520 |
|
|
this.startMode = (dayOfWeek != 0)
|
521 |
|
|
? (after ? DOW_GE_DOM_MODE : DOW_LE_DOM_MODE)
|
522 |
|
|
: checkRule(month, day, dayOfWeek);
|
523 |
|
|
this.startDay = Math.abs(this.startDay);
|
524 |
|
|
this.startDayOfWeek = Math.abs(this.startDayOfWeek);
|
525 |
|
|
|
526 |
|
|
this.startMonth = month;
|
527 |
|
|
|
528 |
|
|
if (this.startTimeMode == WALL_TIME || this.startTimeMode == STANDARD_TIME)
|
529 |
|
|
this.startTime = time;
|
530 |
|
|
else
|
531 |
|
|
// Convert from UTC to STANDARD
|
532 |
|
|
this.startTime = time + this.rawOffset;
|
533 |
|
|
useDaylight = true;
|
534 |
|
|
}
|
535 |
|
|
|
536 |
|
|
/**
|
537 |
|
|
* Sets the daylight savings start rule. You must also set the
|
538 |
|
|
* end rule with <code>setEndRule</code> or the result of
|
539 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
540 |
|
|
* constructor above.
|
541 |
|
|
*
|
542 |
|
|
* @param month The month where daylight savings start, zero
|
543 |
|
|
* based. You should use the constants in Calendar.
|
544 |
|
|
* @param day A day of month or day of week in month.
|
545 |
|
|
* @param time The time in milliseconds standard time where daylight
|
546 |
|
|
* savings start.
|
547 |
|
|
* @see SimpleTimeZone
|
548 |
|
|
* @since 1.2
|
549 |
|
|
*/
|
550 |
|
|
public void setStartRule(int month, int day, int time)
|
551 |
|
|
{
|
552 |
|
|
setStartRule(month, day, 0, time);
|
553 |
|
|
}
|
554 |
|
|
|
555 |
|
|
/**
|
556 |
|
|
* Sets the daylight savings end rule. You must also set the
|
557 |
|
|
* start rule with <code>setStartRule</code> or the result of
|
558 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
559 |
|
|
* constructor above.
|
560 |
|
|
*
|
561 |
|
|
* @param month The end month of daylight savings.
|
562 |
|
|
* @param day A day in month, or a day of week in month.
|
563 |
|
|
* @param dayOfWeek A day of week, when daylight savings ends.
|
564 |
|
|
* @param time A time in millis in standard time.
|
565 |
|
|
* @see #setStartRule(int, int, int, int)
|
566 |
|
|
*/
|
567 |
|
|
public void setEndRule(int month, int day, int dayOfWeek, int time)
|
568 |
|
|
{
|
569 |
|
|
this.endMode = checkRule(month, day, dayOfWeek);
|
570 |
|
|
this.endMonth = month;
|
571 |
|
|
this.endDay = day;
|
572 |
|
|
this.endDayOfWeek = Math.abs(dayOfWeek);
|
573 |
|
|
if (this.endTimeMode == WALL_TIME)
|
574 |
|
|
this.endTime = time;
|
575 |
|
|
else if (this.endTimeMode == STANDARD_TIME)
|
576 |
|
|
// Convert from STANDARD to DST
|
577 |
|
|
this.endTime = time + this.dstSavings;
|
578 |
|
|
else
|
579 |
|
|
// Convert from UTC to DST
|
580 |
|
|
this.endTime = time + this.rawOffset + this.dstSavings;
|
581 |
|
|
useDaylight = true;
|
582 |
|
|
}
|
583 |
|
|
|
584 |
|
|
/**
|
585 |
|
|
* Sets the daylight savings end rule. You must also set the
|
586 |
|
|
* start rule with <code>setStartRule</code> or the result of
|
587 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
588 |
|
|
* constructor above.
|
589 |
|
|
*
|
590 |
|
|
* Note that this API isn't incredibly well specified. It appears that the
|
591 |
|
|
* after flag must override the parameters, since normally, the day and
|
592 |
|
|
* dayofweek can select this. I.e., if day < 0 and dayOfWeek < 0, on or
|
593 |
|
|
* before mode is chosen. But if after == true, this implementation
|
594 |
|
|
* overrides the signs of the other arguments. And if dayOfWeek == 0, it
|
595 |
|
|
* falls back to the behavior in the other APIs. I guess this should be
|
596 |
|
|
* checked against Sun's implementation.
|
597 |
|
|
*
|
598 |
|
|
* @param month The end month of daylight savings.
|
599 |
|
|
* @param day A day in month, or a day of week in month.
|
600 |
|
|
* @param dayOfWeek A day of week, when daylight savings ends.
|
601 |
|
|
* @param time A time in millis in standard time.
|
602 |
|
|
* @param after If true, day and dayOfWeek specify first day of week on or
|
603 |
|
|
* after day, else first day of week on or before.
|
604 |
|
|
* @since 1.2
|
605 |
|
|
* @see #setStartRule(int, int, int, int, boolean)
|
606 |
|
|
*/
|
607 |
|
|
public void setEndRule(int month, int day, int dayOfWeek, int time,
|
608 |
|
|
boolean after)
|
609 |
|
|
{
|
610 |
|
|
// FIXME: XXX: Validate that checkRule and offset processing work with on
|
611 |
|
|
// or before mode.
|
612 |
|
|
this.endDay = after ? Math.abs(day) : -Math.abs(day);
|
613 |
|
|
this.endDayOfWeek = after ? Math.abs(dayOfWeek) : -Math.abs(dayOfWeek);
|
614 |
|
|
this.endMode = (dayOfWeek != 0)
|
615 |
|
|
? (after ? DOW_GE_DOM_MODE : DOW_LE_DOM_MODE)
|
616 |
|
|
: checkRule(month, day, dayOfWeek);
|
617 |
|
|
this.endDay = Math.abs(this.endDay);
|
618 |
|
|
this.endDayOfWeek = Math.abs(endDayOfWeek);
|
619 |
|
|
|
620 |
|
|
this.endMonth = month;
|
621 |
|
|
|
622 |
|
|
if (this.endTimeMode == WALL_TIME)
|
623 |
|
|
this.endTime = time;
|
624 |
|
|
else if (this.endTimeMode == STANDARD_TIME)
|
625 |
|
|
// Convert from STANDARD to DST
|
626 |
|
|
this.endTime = time + this.dstSavings;
|
627 |
|
|
else
|
628 |
|
|
// Convert from UTC to DST
|
629 |
|
|
this.endTime = time + this.rawOffset + this.dstSavings;
|
630 |
|
|
useDaylight = true;
|
631 |
|
|
}
|
632 |
|
|
|
633 |
|
|
/**
|
634 |
|
|
* Sets the daylight savings end rule. You must also set the
|
635 |
|
|
* start rule with <code>setStartRule</code> or the result of
|
636 |
|
|
* getOffset is undefined. For the parameters see the ten-argument
|
637 |
|
|
* constructor above.
|
638 |
|
|
*
|
639 |
|
|
* @param month The end month of daylight savings.
|
640 |
|
|
* @param day A day in month, or a day of week in month.
|
641 |
|
|
* @param time A time in millis in standard time.
|
642 |
|
|
* @see #setStartRule(int, int, int)
|
643 |
|
|
*/
|
644 |
|
|
public void setEndRule(int month, int day, int time)
|
645 |
|
|
{
|
646 |
|
|
setEndRule(month, day, 0, time);
|
647 |
|
|
}
|
648 |
|
|
|
649 |
|
|
/**
|
650 |
|
|
* Gets the time zone offset, for current date, modified in case of
|
651 |
|
|
* daylight savings. This is the offset to add to UTC to get the local
|
652 |
|
|
* time.
|
653 |
|
|
*
|
654 |
|
|
* In the standard JDK the results given by this method may result in
|
655 |
|
|
* inaccurate results at the end of February or the beginning of March.
|
656 |
|
|
* To avoid this, you should use Calendar instead:
|
657 |
|
|
* <code>offset = cal.get(Calendar.ZONE_OFFSET)
|
658 |
|
|
* + cal.get(Calendar.DST_OFFSET);</code>
|
659 |
|
|
*
|
660 |
|
|
* This version doesn't suffer this inaccuracy.
|
661 |
|
|
*
|
662 |
|
|
* The arguments don't follow the approach for setting start and end rules.
|
663 |
|
|
* The day must be a positive number and dayOfWeek must be a positive value
|
664 |
|
|
* from Calendar. dayOfWeek is redundant, but must match the other values
|
665 |
|
|
* or an inaccurate result may be returned.
|
666 |
|
|
*
|
667 |
|
|
* @param era the era of the given date
|
668 |
|
|
* @param year the year of the given date
|
669 |
|
|
* @param month the month of the given date, 0 for January.
|
670 |
|
|
* @param day the day of month
|
671 |
|
|
* @param dayOfWeek the day of week; this must match the other fields.
|
672 |
|
|
* @param millis the millis in the day (in local standard time)
|
673 |
|
|
* @return the time zone offset in milliseconds.
|
674 |
|
|
* @throws IllegalArgumentException if arguments are incorrect.
|
675 |
|
|
*/
|
676 |
|
|
public int getOffset(int era, int year, int month, int day, int dayOfWeek,
|
677 |
|
|
int millis)
|
678 |
|
|
{
|
679 |
|
|
int daysInMonth = getDaysInMonth(month, year);
|
680 |
|
|
if (day < 1 || day > daysInMonth)
|
681 |
|
|
throw new IllegalArgumentException("day out of range");
|
682 |
|
|
if (dayOfWeek < Calendar.SUNDAY || dayOfWeek > Calendar.SATURDAY)
|
683 |
|
|
throw new IllegalArgumentException("dayOfWeek out of range");
|
684 |
|
|
if (month < Calendar.JANUARY || month > Calendar.DECEMBER)
|
685 |
|
|
throw new IllegalArgumentException("month out of range:" + month);
|
686 |
|
|
|
687 |
|
|
// This method is called by Calendar, so we mustn't use that class.
|
688 |
|
|
int daylightSavings = 0;
|
689 |
|
|
if (useDaylight && era == GregorianCalendar.AD && year >= startYear)
|
690 |
|
|
{
|
691 |
|
|
// This does only work for Gregorian calendars :-(
|
692 |
|
|
// This is mainly because setStartYear doesn't take an era.
|
693 |
|
|
boolean afterStart = ! isBefore(year, month, day, dayOfWeek, millis,
|
694 |
|
|
startMode, startMonth, startDay,
|
695 |
|
|
startDayOfWeek, startTime);
|
696 |
|
|
boolean beforeEnd = isBefore(year, month, day, dayOfWeek,
|
697 |
|
|
millis + dstSavings,
|
698 |
|
|
endMode, endMonth, endDay, endDayOfWeek,
|
699 |
|
|
endTime);
|
700 |
|
|
|
701 |
|
|
if (startMonth < endMonth)
|
702 |
|
|
// use daylight savings, if the date is after the start of
|
703 |
|
|
// savings, and before the end of savings.
|
704 |
|
|
daylightSavings = afterStart && beforeEnd ? dstSavings : 0;
|
705 |
|
|
else
|
706 |
|
|
// use daylight savings, if the date is before the end of
|
707 |
|
|
// savings, or after the start of savings.
|
708 |
|
|
daylightSavings = beforeEnd || afterStart ? dstSavings : 0;
|
709 |
|
|
}
|
710 |
|
|
return rawOffset + daylightSavings;
|
711 |
|
|
}
|
712 |
|
|
|
713 |
|
|
/**
|
714 |
|
|
* Returns the time zone offset to GMT in milliseconds, ignoring
|
715 |
|
|
* day light savings.
|
716 |
|
|
* @return the time zone offset.
|
717 |
|
|
*/
|
718 |
|
|
public int getRawOffset()
|
719 |
|
|
{
|
720 |
|
|
return rawOffset;
|
721 |
|
|
}
|
722 |
|
|
|
723 |
|
|
/**
|
724 |
|
|
* Sets the standard time zone offset to GMT.
|
725 |
|
|
* @param rawOffset The time offset from GMT in milliseconds.
|
726 |
|
|
*/
|
727 |
|
|
public void setRawOffset(int rawOffset)
|
728 |
|
|
{
|
729 |
|
|
this.rawOffset = rawOffset;
|
730 |
|
|
}
|
731 |
|
|
|
732 |
|
|
/**
|
733 |
|
|
* Gets the daylight savings offset. This is a positive offset in
|
734 |
|
|
* milliseconds with respect to standard time. Typically this
|
735 |
|
|
* is one hour, but for some time zones this may be half an our.
|
736 |
|
|
* @return the daylight savings offset in milliseconds.
|
737 |
|
|
*
|
738 |
|
|
* @since 1.2
|
739 |
|
|
*/
|
740 |
|
|
public int getDSTSavings()
|
741 |
|
|
{
|
742 |
|
|
return dstSavings;
|
743 |
|
|
}
|
744 |
|
|
|
745 |
|
|
/**
|
746 |
|
|
* Sets the daylight savings offset. This is a positive offset in
|
747 |
|
|
* milliseconds with respect to standard time.
|
748 |
|
|
*
|
749 |
|
|
* @param dstSavings the daylight savings offset in milliseconds.
|
750 |
|
|
*
|
751 |
|
|
* @since 1.2
|
752 |
|
|
*/
|
753 |
|
|
public void setDSTSavings(int dstSavings)
|
754 |
|
|
{
|
755 |
|
|
if (dstSavings <= 0)
|
756 |
|
|
throw new IllegalArgumentException("illegal value for dstSavings");
|
757 |
|
|
|
758 |
|
|
this.dstSavings = dstSavings;
|
759 |
|
|
}
|
760 |
|
|
|
761 |
|
|
/**
|
762 |
|
|
* Returns if this time zone uses daylight savings time.
|
763 |
|
|
* @return true, if we use daylight savings time, false otherwise.
|
764 |
|
|
*/
|
765 |
|
|
public boolean useDaylightTime()
|
766 |
|
|
{
|
767 |
|
|
return useDaylight;
|
768 |
|
|
}
|
769 |
|
|
|
770 |
|
|
/**
|
771 |
|
|
* Returns the number of days in the given month.
|
772 |
|
|
* Uses gregorian rules prior to 1582 (The default and earliest cutover)
|
773 |
|
|
* @param month The month, zero based; use one of the Calendar constants.
|
774 |
|
|
* @param year The year.
|
775 |
|
|
*/
|
776 |
|
|
private int getDaysInMonth(int month, int year)
|
777 |
|
|
{
|
778 |
|
|
if (month == Calendar.FEBRUARY)
|
779 |
|
|
{
|
780 |
|
|
if ((year & 3) != 0)
|
781 |
|
|
return 28;
|
782 |
|
|
|
783 |
|
|
// Assume default Gregorian cutover,
|
784 |
|
|
// all years prior to this must be Julian
|
785 |
|
|
if (year < 1582)
|
786 |
|
|
return 29;
|
787 |
|
|
|
788 |
|
|
// Gregorian rules
|
789 |
|
|
return ((year % 100) != 0 || (year % 400) == 0) ? 29 : 28;
|
790 |
|
|
}
|
791 |
|
|
else
|
792 |
|
|
return monthArr[month];
|
793 |
|
|
}
|
794 |
|
|
|
795 |
|
|
/**
|
796 |
|
|
* Checks if the date given in calXXXX, is before the change between
|
797 |
|
|
* dst and standard time.
|
798 |
|
|
* @param calYear the year of the date to check (for leap day checking).
|
799 |
|
|
* @param calMonth the month of the date to check.
|
800 |
|
|
* @param calDayOfMonth the day of month of the date to check.
|
801 |
|
|
* @param calDayOfWeek the day of week of the date to check.
|
802 |
|
|
* @param calMillis the millis of day of the date to check (standard time).
|
803 |
|
|
* @param mode the change mode; same semantic as startMode.
|
804 |
|
|
* @param month the change month; same semantic as startMonth.
|
805 |
|
|
* @param day the change day; same semantic as startDay.
|
806 |
|
|
* @param dayOfWeek the change day of week;
|
807 |
|
|
* @param millis the change time in millis since midnight standard time.
|
808 |
|
|
* same semantic as startDayOfWeek.
|
809 |
|
|
* @return true, if cal is before the change, false if cal is on
|
810 |
|
|
* or after the change.
|
811 |
|
|
*/
|
812 |
|
|
private boolean isBefore(int calYear, int calMonth, int calDayOfMonth,
|
813 |
|
|
int calDayOfWeek, int calMillis, int mode,
|
814 |
|
|
int month, int day, int dayOfWeek, int millis)
|
815 |
|
|
{
|
816 |
|
|
// This method is called by Calendar, so we mustn't use that class.
|
817 |
|
|
// We have to do all calculations by hand.
|
818 |
|
|
// check the months:
|
819 |
|
|
// XXX - this is not correct:
|
820 |
|
|
// for the DOW_GE_DOM and DOW_LE_DOM modes the change date may
|
821 |
|
|
// be in a different month.
|
822 |
|
|
if (calMonth != month)
|
823 |
|
|
return calMonth < month;
|
824 |
|
|
|
825 |
|
|
// check the day:
|
826 |
|
|
switch (mode)
|
827 |
|
|
{
|
828 |
|
|
case DOM_MODE:
|
829 |
|
|
if (calDayOfMonth != day)
|
830 |
|
|
return calDayOfMonth < day;
|
831 |
|
|
break;
|
832 |
|
|
case DOW_IN_MONTH_MODE:
|
833 |
|
|
{
|
834 |
|
|
// This computes the day of month of the day of type
|
835 |
|
|
// "dayOfWeek" that lies in the same (sunday based) week as cal.
|
836 |
|
|
calDayOfMonth += (dayOfWeek - calDayOfWeek);
|
837 |
|
|
|
838 |
|
|
// Now we convert it to 7 based number (to get a one based offset
|
839 |
|
|
// after dividing by 7). If we count from the end of the
|
840 |
|
|
// month, we get want a -7 based number counting the days from
|
841 |
|
|
// the end:
|
842 |
|
|
if (day < 0)
|
843 |
|
|
calDayOfMonth -= getDaysInMonth(calMonth, calYear) + 7;
|
844 |
|
|
else
|
845 |
|
|
calDayOfMonth += 6;
|
846 |
|
|
|
847 |
|
|
// day > 0 day < 0
|
848 |
|
|
// S M T W T F S S M T W T F S
|
849 |
|
|
// 7 8 9 10 11 12 -36-35-34-33-32-31
|
850 |
|
|
// 13 14 15 16 17 18 19 -30-29-28-27-26-25-24
|
851 |
|
|
// 20 21 22 23 24 25 26 -23-22-21-20-19-18-17
|
852 |
|
|
// 27 28 29 30 31 32 33 -16-15-14-13-12-11-10
|
853 |
|
|
// 34 35 36 -9 -8 -7
|
854 |
|
|
// Now we calculate the day of week in month:
|
855 |
|
|
int week = calDayOfMonth / 7;
|
856 |
|
|
|
857 |
|
|
// day > 0 day < 0
|
858 |
|
|
// S M T W T F S S M T W T F S
|
859 |
|
|
// 1 1 1 1 1 1 -5 -5 -4 -4 -4 -4
|
860 |
|
|
// 1 2 2 2 2 2 2 -4 -4 -4 -3 -3 -3 -3
|
861 |
|
|
// 2 3 3 3 3 3 3 -3 -3 -3 -2 -2 -2 -2
|
862 |
|
|
// 3 4 4 4 4 4 4 -2 -2 -2 -1 -1 -1 -1
|
863 |
|
|
// 4 5 5 -1 -1 -1
|
864 |
|
|
if (week != day)
|
865 |
|
|
return week < day;
|
866 |
|
|
|
867 |
|
|
if (calDayOfWeek != dayOfWeek)
|
868 |
|
|
return calDayOfWeek < dayOfWeek;
|
869 |
|
|
|
870 |
|
|
// daylight savings starts/ends on the given day.
|
871 |
|
|
break;
|
872 |
|
|
}
|
873 |
|
|
case DOW_LE_DOM_MODE:
|
874 |
|
|
// The greatest sunday before or equal December, 12
|
875 |
|
|
// is the same as smallest sunday after or equal December, 6.
|
876 |
|
|
day = Math.abs(day) - 6;
|
877 |
|
|
case DOW_GE_DOM_MODE:
|
878 |
|
|
// Calculate the day of month of the day of type
|
879 |
|
|
// "dayOfWeek" that lies before (or on) the given date.
|
880 |
|
|
calDayOfMonth -= (calDayOfWeek < dayOfWeek ? 7 : 0) + calDayOfWeek
|
881 |
|
|
- dayOfWeek;
|
882 |
|
|
if (calDayOfMonth < day)
|
883 |
|
|
return true;
|
884 |
|
|
if (calDayOfWeek != dayOfWeek || calDayOfMonth >= day + 7)
|
885 |
|
|
return false;
|
886 |
|
|
|
887 |
|
|
// now we have the same day
|
888 |
|
|
break;
|
889 |
|
|
}
|
890 |
|
|
|
891 |
|
|
// the millis decides:
|
892 |
|
|
return (calMillis < millis);
|
893 |
|
|
}
|
894 |
|
|
|
895 |
|
|
/**
|
896 |
|
|
* Determines if the given date is in daylight savings time.
|
897 |
|
|
* @return true, if it is in daylight savings time, false otherwise.
|
898 |
|
|
*/
|
899 |
|
|
public boolean inDaylightTime(Date date)
|
900 |
|
|
{
|
901 |
|
|
Calendar cal = Calendar.getInstance(this);
|
902 |
|
|
cal.setTime(date);
|
903 |
|
|
return (cal.get(Calendar.DST_OFFSET) != 0);
|
904 |
|
|
}
|
905 |
|
|
|
906 |
|
|
/**
|
907 |
|
|
* Generates the hashCode for the SimpleDateFormat object. It is
|
908 |
|
|
* the rawOffset, possibly, if useDaylightSavings is true, xored
|
909 |
|
|
* with startYear, startMonth, startDayOfWeekInMonth, ..., endTime.
|
910 |
|
|
*/
|
911 |
|
|
public synchronized int hashCode()
|
912 |
|
|
{
|
913 |
|
|
return rawOffset
|
914 |
|
|
^ (useDaylight
|
915 |
|
|
? startMonth ^ startDay ^ startDayOfWeek ^ startTime ^ endMonth
|
916 |
|
|
^ endDay ^ endDayOfWeek ^ endTime : 0);
|
917 |
|
|
}
|
918 |
|
|
|
919 |
|
|
public synchronized boolean equals(Object o)
|
920 |
|
|
{
|
921 |
|
|
if (this == o)
|
922 |
|
|
return true;
|
923 |
|
|
if (! (o instanceof SimpleTimeZone))
|
924 |
|
|
return false;
|
925 |
|
|
SimpleTimeZone zone = (SimpleTimeZone) o;
|
926 |
|
|
if (zone.hashCode() != hashCode() || ! getID().equals(zone.getID())
|
927 |
|
|
|| rawOffset != zone.rawOffset || useDaylight != zone.useDaylight)
|
928 |
|
|
return false;
|
929 |
|
|
if (! useDaylight)
|
930 |
|
|
return true;
|
931 |
|
|
return (startYear == zone.startYear && startMonth == zone.startMonth
|
932 |
|
|
&& startDay == zone.startDay
|
933 |
|
|
&& startDayOfWeek == zone.startDayOfWeek
|
934 |
|
|
&& startTime == zone.startTime
|
935 |
|
|
&& startTimeMode == zone.startTimeMode && endMonth == zone.endMonth
|
936 |
|
|
&& endDay == zone.endDay && endDayOfWeek == zone.endDayOfWeek
|
937 |
|
|
&& endTime == zone.endTime && endTimeMode == zone.endTimeMode);
|
938 |
|
|
}
|
939 |
|
|
|
940 |
|
|
/**
|
941 |
|
|
* Test if the other time zone uses the same rule and only
|
942 |
|
|
* possibly differs in ID. This implementation for this particular
|
943 |
|
|
* class will return true if the other object is a SimpleTimeZone,
|
944 |
|
|
* the raw offsets and useDaylight are identical and if useDaylight
|
945 |
|
|
* is true, also the start and end datas are identical.
|
946 |
|
|
* @return true if this zone uses the same rule.
|
947 |
|
|
*/
|
948 |
|
|
public boolean hasSameRules(TimeZone other)
|
949 |
|
|
{
|
950 |
|
|
if (this == other)
|
951 |
|
|
return true;
|
952 |
|
|
if (! (other instanceof SimpleTimeZone))
|
953 |
|
|
return false;
|
954 |
|
|
SimpleTimeZone zone = (SimpleTimeZone) other;
|
955 |
|
|
if (zone.hashCode() != hashCode() || rawOffset != zone.rawOffset
|
956 |
|
|
|| useDaylight != zone.useDaylight)
|
957 |
|
|
return false;
|
958 |
|
|
if (! useDaylight)
|
959 |
|
|
return true;
|
960 |
|
|
return (startYear == zone.startYear && startMonth == zone.startMonth
|
961 |
|
|
&& startDay == zone.startDay
|
962 |
|
|
&& startDayOfWeek == zone.startDayOfWeek
|
963 |
|
|
&& startTime == zone.startTime
|
964 |
|
|
&& startTimeMode == zone.startTimeMode && endMonth == zone.endMonth
|
965 |
|
|
&& endDay == zone.endDay && endDayOfWeek == zone.endDayOfWeek
|
966 |
|
|
&& endTime == zone.endTime && endTimeMode == zone.endTimeMode);
|
967 |
|
|
}
|
968 |
|
|
|
969 |
|
|
/**
|
970 |
|
|
* Returns a string representation of this SimpleTimeZone object.
|
971 |
|
|
* @return a string representation of this SimpleTimeZone object.
|
972 |
|
|
*/
|
973 |
|
|
public String toString()
|
974 |
|
|
{
|
975 |
|
|
// the test for useDaylight is an incompatibility to jdk1.2, but
|
976 |
|
|
// I think this shouldn't hurt.
|
977 |
|
|
return getClass().getName() + "[" + "id=" + getID() + ",offset="
|
978 |
|
|
+ rawOffset + ",dstSavings=" + dstSavings + ",useDaylight="
|
979 |
|
|
+ useDaylight
|
980 |
|
|
+ (useDaylight
|
981 |
|
|
? ",startYear=" + startYear + ",startMode=" + startMode
|
982 |
|
|
+ ",startMonth=" + startMonth + ",startDay=" + startDay
|
983 |
|
|
+ ",startDayOfWeek=" + startDayOfWeek + ",startTime="
|
984 |
|
|
+ startTime + ",startTimeMode=" + startTimeMode + ",endMode="
|
985 |
|
|
+ endMode + ",endMonth=" + endMonth + ",endDay=" + endDay
|
986 |
|
|
+ ",endDayOfWeek=" + endDayOfWeek + ",endTime=" + endTime
|
987 |
|
|
+ ",endTimeMode=" + endTimeMode : "") + "]";
|
988 |
|
|
}
|
989 |
|
|
|
990 |
|
|
/**
|
991 |
|
|
* Reads a serialized simple time zone from stream.
|
992 |
|
|
* @see #writeObject
|
993 |
|
|
*/
|
994 |
|
|
private void readObject(java.io.ObjectInputStream input)
|
995 |
|
|
throws java.io.IOException, ClassNotFoundException
|
996 |
|
|
{
|
997 |
|
|
input.defaultReadObject();
|
998 |
|
|
if (serialVersionOnStream == 0)
|
999 |
|
|
{
|
1000 |
|
|
// initialize the new fields to default values.
|
1001 |
|
|
dstSavings = 60 * 60 * 1000;
|
1002 |
|
|
endMode = DOW_IN_MONTH_MODE;
|
1003 |
|
|
startMode = DOW_IN_MONTH_MODE;
|
1004 |
|
|
startTimeMode = WALL_TIME;
|
1005 |
|
|
endTimeMode = WALL_TIME;
|
1006 |
|
|
serialVersionOnStream = 2;
|
1007 |
|
|
}
|
1008 |
|
|
else
|
1009 |
|
|
{
|
1010 |
|
|
int length = input.readInt();
|
1011 |
|
|
byte[] byteArray = new byte[length];
|
1012 |
|
|
input.read(byteArray, 0, length);
|
1013 |
|
|
if (length >= 4)
|
1014 |
|
|
{
|
1015 |
|
|
// Lets hope that Sun does extensions to the serialized
|
1016 |
|
|
// form in a sane manner.
|
1017 |
|
|
startDay = byteArray[0];
|
1018 |
|
|
startDayOfWeek = byteArray[1];
|
1019 |
|
|
endDay = byteArray[2];
|
1020 |
|
|
endDayOfWeek = byteArray[3];
|
1021 |
|
|
}
|
1022 |
|
|
}
|
1023 |
|
|
}
|
1024 |
|
|
|
1025 |
|
|
/**
|
1026 |
|
|
* Serializes this object to a stream. @serialdata The object is
|
1027 |
|
|
* first written in the old JDK 1.1 format, so that it can be read
|
1028 |
|
|
* by by the old classes. This means, that the
|
1029 |
|
|
* <code>start/endDay(OfWeek)</code>-Fields are written in the
|
1030 |
|
|
* DOW_IN_MONTH_MODE rule, since this was the only supported rule
|
1031 |
|
|
* in 1.1.
|
1032 |
|
|
*
|
1033 |
|
|
* In the optional section, we write first the length of an byte
|
1034 |
|
|
* array as int and afterwards the byte array itself. The byte
|
1035 |
|
|
* array contains in this release four elements, namely the real
|
1036 |
|
|
* startDay, startDayOfWeek endDay, endDayOfWeek in that Order.
|
1037 |
|
|
* These fields are needed, because for compatibility reasons only
|
1038 |
|
|
* approximative values are written to the required section, as
|
1039 |
|
|
* described above.
|
1040 |
|
|
*/
|
1041 |
|
|
private void writeObject(java.io.ObjectOutputStream output)
|
1042 |
|
|
throws java.io.IOException
|
1043 |
|
|
{
|
1044 |
|
|
byte[] byteArray = new byte[]
|
1045 |
|
|
{
|
1046 |
|
|
(byte) startDay, (byte) startDayOfWeek, (byte) endDay,
|
1047 |
|
|
(byte) endDayOfWeek
|
1048 |
|
|
};
|
1049 |
|
|
|
1050 |
|
|
/* calculate the approximation for JDK 1.1 */
|
1051 |
|
|
switch (startMode)
|
1052 |
|
|
{
|
1053 |
|
|
case DOM_MODE:
|
1054 |
|
|
startDayOfWeek = Calendar.SUNDAY; // random day of week
|
1055 |
|
|
|
1056 |
|
|
// fall through
|
1057 |
|
|
case DOW_GE_DOM_MODE:
|
1058 |
|
|
case DOW_LE_DOM_MODE:
|
1059 |
|
|
startDay = (startDay + 6) / 7;
|
1060 |
|
|
}
|
1061 |
|
|
switch (endMode)
|
1062 |
|
|
{
|
1063 |
|
|
case DOM_MODE:
|
1064 |
|
|
endDayOfWeek = Calendar.SUNDAY;
|
1065 |
|
|
|
1066 |
|
|
// fall through
|
1067 |
|
|
case DOW_GE_DOM_MODE:
|
1068 |
|
|
case DOW_LE_DOM_MODE:
|
1069 |
|
|
endDay = (endDay + 6) / 7;
|
1070 |
|
|
}
|
1071 |
|
|
|
1072 |
|
|
// the required part:
|
1073 |
|
|
output.defaultWriteObject();
|
1074 |
|
|
// the optional part:
|
1075 |
|
|
output.writeInt(byteArray.length);
|
1076 |
|
|
output.write(byteArray, 0, byteArray.length);
|
1077 |
|
|
}
|
1078 |
|
|
}
|