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842 lines
28 KiB
Java
842 lines
28 KiB
Java
/* java.util.SimpleTimeZone
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Copyright (C) 1998, 1999, 2000 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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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import java.text.DateFormatSymbols;
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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 GregorianCalender
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* @author Jochen Hoenicke */
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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 our.
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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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* 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 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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{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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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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*
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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 = 1;
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private static final long serialVersionUID = -403250971215465050L;
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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 startday 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 endday 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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public SimpleTimeZone(int rawOffset, String id,
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int startMonth, int startDayOfWeekInMonth,
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int startDayOfWeek, int startTime,
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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,
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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
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("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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*/
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public SimpleTimeZone(int rawOffset, String id,
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int startMonth, int startDayOfWeekInMonth,
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int startDayOfWeek, int startTime,
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int endMonth, int endDayOfWeekInMonth,
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int endDayOfWeek, int endTime, int dstSavings)
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{
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this(rawOffset, id,
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startMonth, startDayOfWeekInMonth, startDayOfWeek, startTime,
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endMonth, endDayOfWeekInMonth, endDayOfWeek, endTime);
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this.dstSavings = dstSavings;
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}
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/**
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* Sets the first year, where daylight savings applies. The daylight
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* savings rule never apply for years in the BC era. Note that this
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* is gregorian calendar specific.
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* @param year the start year.
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*/
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public void setStartYear(int year)
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{
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startYear = year;
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useDaylight = true;
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}
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/**
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* Checks if the month, day, dayOfWeek arguments are in range and
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* returns the mode of the rule.
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* @param month the month parameter as in the constructor
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* @param day the day parameter as in the constructor
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* @param dayOfWeek the day of week parameter as in the constructor
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* @return the mode of this rule see startMode.
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* @exception IllegalArgumentException if parameters are out of range.
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* @see #SimpleTimeZone(int, String, int, int, int, int, int, int, int, int)
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* @see #startMode
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*/
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private int checkRule(int month, int day, int dayOfWeek)
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{
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int daysInMonth = getDaysInMonth(month, 1);
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if (dayOfWeek == 0)
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{
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if (day <= 0 || day > daysInMonth)
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throw new IllegalArgumentException("day out of range");
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return DOM_MODE;
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}
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else if (dayOfWeek > 0)
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{
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if (Math.abs(day) > (daysInMonth + 6) / 7)
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throw new IllegalArgumentException("dayOfWeekInMonth out of range");
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if (dayOfWeek > Calendar.SATURDAY)
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throw new IllegalArgumentException("dayOfWeek out of range");
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return DOW_IN_MONTH_MODE;
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}
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else
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{
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if (day == 0 || Math.abs(day) > daysInMonth)
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throw new IllegalArgumentException("day out of range");
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if (dayOfWeek < -Calendar.SATURDAY)
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throw new IllegalArgumentException("dayOfWeek out of range");
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if (day < 0)
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return DOW_LE_DOM_MODE;
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else
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return DOW_GE_DOM_MODE;
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}
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}
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/**
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* Sets the daylight savings start rule. You must also set the
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* end rule with <code>setEndRule</code> or the result of
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* getOffset is undefined. For the parameters see the ten-argument
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* constructor above.
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*
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* @param month The month where daylight savings start, zero
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* based. You should use the constants in Calendar.
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* @param day A day of month or day of week in month.
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* @param dayOfWeek The day of week where daylight savings start.
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* @param time The time in milliseconds standard time where daylight
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* savings start.
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* @see SimpleTimeZone */
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public void setStartRule(int month, int day, int dayOfWeek, int time)
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{
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this.startMode = checkRule(month, day, dayOfWeek);
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this.startMonth = month;
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// FIXME: XXX: JDK 1.2 allows negative values and has 2 new variations
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// of this method.
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this.startDay = Math.abs(day);
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this.startDayOfWeek = Math.abs(dayOfWeek);
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this.startTime = time;
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useDaylight = true;
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}
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/**
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* Sets the daylight savings end rule. You must also set the
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* start rule with <code>setStartRule</code> or the result of
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* getOffset is undefined. For the parameters see the ten-argument
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* constructor above.
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*
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* @param rawOffset The time offset from GMT.
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* @param id The identifier of this time zone.
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* @param Month The end month of daylight savings.
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* @param day A day in month, or a day of week in month.
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* @param DayOfWeek A day of week, when daylight savings ends.
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* @param Time A time in millis in standard time.
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* @see #setStartRule */
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public void setEndRule(int month, int day, int dayOfWeek, int time)
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{
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this.endMode = checkRule(month, day, dayOfWeek);
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this.endMonth = month;
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// FIXME: XXX: JDK 1.2 allows negative values and has 2 new variations
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// of this method.
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this.endDay = Math.abs(day);
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this.endDayOfWeek = Math.abs(dayOfWeek);
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this.endTime = time;
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useDaylight = true;
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}
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/**
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* Gets the time zone offset, for current date, modified in case of
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* daylight savings. This is the offset to add to UTC to get the local
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* time.
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*
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* In the standard JDK the results given by this method may result in
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* inaccurate results at the end of February or the beginning of March.
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* To avoid this, you should use Calendar instead:
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* <pre>
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* offset = cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET);
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* </pre>
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* You could also use in
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*
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* This version doesn't suffer this inaccuracy.
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*
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* @param era the era of the given date
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* @param year the year of the given date
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* @param month the month of the given date, 0 for January.
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* @param day the day of month
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* @param dayOfWeek the day of week; this must be matching the
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* other fields.
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* @param millis the millis in the day (in local standard time)
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* @return the time zone offset in milliseconds. */
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public int getOffset(int era, int year, int month,
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int day, int dayOfWeek, int millis)
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{
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// This method is called by Calendar, so we mustn't use that class.
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int daylightSavings = 0;
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if (useDaylight && era == GregorianCalendar.AD && year >= startYear)
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{
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// This does only work for Gregorian calendars :-(
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// This is mainly because setStartYear doesn't take an era.
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boolean afterStart = !isBefore(year, month, day, dayOfWeek, millis,
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startMode, startMonth,
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startDay, startDayOfWeek, startTime);
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boolean beforeEnd = isBefore(year, month, day, dayOfWeek, millis,
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endMode, endMonth,
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endDay, endDayOfWeek, endTime);
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if (startMonth < endMonth)
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{
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// use daylight savings, if the date is after the start of
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// savings, and before the end of savings.
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daylightSavings = afterStart && beforeEnd ? dstSavings : 0;
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}
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else
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{
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// use daylight savings, if the date is before the end of
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// savings, or after the start of savings.
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daylightSavings = beforeEnd || afterStart ? dstSavings : 0;
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}
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}
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return rawOffset + daylightSavings;
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}
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/**
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* Returns the time zone offset to GMT in milliseconds, ignoring
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* day light savings.
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* @return the time zone offset. */
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public int getRawOffset()
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{
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return rawOffset;
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}
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/**
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* Sets the standard time zone offset to GMT.
|
|
* @param rawOffset The time offset from GMT in milliseconds.
|
|
*/
|
|
public void setRawOffset(int rawOffset)
|
|
{
|
|
this.rawOffset = rawOffset;
|
|
}
|
|
|
|
/**
|
|
* Gets the daylight savings offset. This is a positive offset in
|
|
* milliseconds with respect to standard time. Typically this
|
|
* is one hour, but for some time zones this may be half an our.
|
|
* @return the daylight savings offset in milliseconds.
|
|
* @since JDK1.1.4?
|
|
*/
|
|
public int getDSTSavings()
|
|
{
|
|
return dstSavings;
|
|
}
|
|
|
|
/**
|
|
* Returns if this time zone uses daylight savings time.
|
|
* @return true, if we use daylight savings time, false otherwise.
|
|
*/
|
|
public boolean useDaylightTime()
|
|
{
|
|
return useDaylight;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of days in the given month. It does always
|
|
* use the Gregorian leap year rule.
|
|
* @param month The month, zero based; use one of the Calendar constants.
|
|
* @param year The year.
|
|
*/
|
|
private int getDaysInMonth(int month, int year)
|
|
{
|
|
// Most of this is copied from GregorianCalendar.getActualMaximum()
|
|
if (month == Calendar.FEBRUARY)
|
|
{
|
|
return ((year & 3) == 0 && (year % 100 != 0 || year % 400 == 0))
|
|
? 29 : 28;
|
|
}
|
|
else if (month < Calendar.AUGUST)
|
|
return 31 - (month & 1);
|
|
else
|
|
return 30 + (month & 1);
|
|
}
|
|
|
|
/**
|
|
* Checks if the date given in calXXXX, is before the change between
|
|
* dst and standard time.
|
|
* @param calYear the year of the date to check (for leap day cheking).
|
|
* @param calMonth the month of the date to check.
|
|
* @param calDay the day of month of the date to check.
|
|
* @param calDayOfWeek the day of week of the date to check.
|
|
* @param calMillis the millis of day of the date to check (standard time).
|
|
* @param mode the change mode; same semantic as startMode.
|
|
* @param month the change month; same semantic as startMonth.
|
|
* @param day the change day; same semantic as startDay.
|
|
* @param dayOfWeek the change day of week;
|
|
* @param millis the change time in millis since midnight standard time.
|
|
* same semantic as startDayOfWeek.
|
|
* @return true, if cal is before the change, false if cal is on
|
|
* or after the change.
|
|
*/
|
|
private boolean isBefore(int calYear,
|
|
int calMonth, int calDayOfMonth, int calDayOfWeek,
|
|
int calMillis, int mode, int month,
|
|
int day, int dayOfWeek, int millis)
|
|
{
|
|
|
|
// This method is called by Calendar, so we mustn't use that class.
|
|
// We have to do all calculations by hand.
|
|
|
|
// check the months:
|
|
|
|
// XXX - this is not correct:
|
|
// for the DOW_GE_DOM and DOW_LE_DOM modes the change date may
|
|
// be in a different month.
|
|
if (calMonth != month)
|
|
return calMonth < month;
|
|
|
|
// check the day:
|
|
switch (mode)
|
|
{
|
|
case DOM_MODE:
|
|
if (calDayOfMonth != day)
|
|
return calDayOfMonth < day;
|
|
break;
|
|
case DOW_IN_MONTH_MODE:
|
|
{
|
|
// This computes the day of month of the day of type
|
|
// "dayOfWeek" that lies in the same (sunday based) week as cal.
|
|
calDayOfMonth += (dayOfWeek - calDayOfWeek);
|
|
|
|
// Now we convert it to 7 based number (to get a one based offset
|
|
// after dividing by 7). If we count from the end of the
|
|
// month, we get want a -7 based number counting the days from
|
|
// the end:
|
|
|
|
if (day < 0)
|
|
calDayOfMonth -= getDaysInMonth(calMonth, calYear) + 7;
|
|
else
|
|
calDayOfMonth += 6;
|
|
|
|
// day > 0 day < 0
|
|
// S M T W T F S S M T W T F S
|
|
// 7 8 9 10 11 12 -36-35-34-33-32-31
|
|
// 13 14 15 16 17 18 19 -30-29-28-27-26-25-24
|
|
// 20 21 22 23 24 25 26 -23-22-21-20-19-18-17
|
|
// 27 28 29 30 31 32 33 -16-15-14-13-12-11-10
|
|
// 34 35 36 -9 -8 -7
|
|
|
|
// Now we calculate the day of week in month:
|
|
int week = calDayOfMonth / 7;
|
|
// day > 0 day < 0
|
|
// S M T W T F S S M T W T F S
|
|
// 1 1 1 1 1 1 -5 -5 -4 -4 -4 -4
|
|
// 1 2 2 2 2 2 2 -4 -4 -4 -3 -3 -3 -3
|
|
// 2 3 3 3 3 3 3 -3 -3 -3 -2 -2 -2 -2
|
|
// 3 4 4 4 4 4 4 -2 -2 -2 -1 -1 -1 -1
|
|
// 4 5 5 -1 -1 -1
|
|
|
|
if (week != day)
|
|
return week < day;
|
|
|
|
if (calDayOfWeek != dayOfWeek)
|
|
return calDayOfWeek < dayOfWeek;
|
|
|
|
// daylight savings starts/ends on the given day.
|
|
break;
|
|
}
|
|
|
|
case DOW_LE_DOM_MODE:
|
|
// The greatest sunday before or equal December, 12
|
|
// is the same as smallest sunday after or equal December, 6.
|
|
day -= 6;
|
|
|
|
case DOW_GE_DOM_MODE:
|
|
|
|
// Calculate the day of month of the day of type
|
|
// "dayOfWeek" that lies before (or on) the given date.
|
|
calDayOfMonth -= (calDayOfWeek < dayOfWeek ? 7 : 0)
|
|
+ calDayOfWeek - dayOfWeek;
|
|
if (calDayOfMonth < day)
|
|
return true;
|
|
if (calDayOfWeek != dayOfWeek || calDayOfMonth >= day + 7)
|
|
return false;
|
|
// now we have the same day
|
|
break;
|
|
}
|
|
// the millis decides:
|
|
return (calMillis < millis);
|
|
}
|
|
|
|
/**
|
|
* Determines if the given date is in daylight savings time.
|
|
* @return true, if it is in daylight savings time, false otherwise.
|
|
*/
|
|
public boolean inDaylightTime(Date date)
|
|
{
|
|
Calendar cal = Calendar.getInstance(this);
|
|
cal.setTime(date);
|
|
return (cal.get(Calendar.DST_OFFSET) != 0);
|
|
}
|
|
|
|
/**
|
|
* Generates the hashCode for the SimpleDateFormat object. It is
|
|
* the rawOffset, possibly, if useDaylightSavings is true, xored
|
|
* with startYear, startMonth, startDayOfWeekInMonth, ..., endTime.
|
|
*/
|
|
public synchronized int hashCode()
|
|
{
|
|
return rawOffset ^
|
|
(useDaylight ?
|
|
startMonth ^ startDay ^ startDayOfWeek ^ startTime
|
|
^ endMonth ^ endDay ^ endDayOfWeek ^ endTime : 0);
|
|
}
|
|
|
|
public synchronized boolean equals(Object o)
|
|
{
|
|
if (this == o)
|
|
return true;
|
|
if (!(o instanceof SimpleTimeZone))
|
|
return false;
|
|
SimpleTimeZone zone = (SimpleTimeZone) o;
|
|
if (zone.hashCode() != hashCode()
|
|
|| !getID().equals(zone.getID())
|
|
|| rawOffset != zone.rawOffset || useDaylight != zone.useDaylight)
|
|
return false;
|
|
if (!useDaylight)
|
|
return true;
|
|
return (startYear == zone.startYear
|
|
&& startMonth == zone.startMonth
|
|
&& startDay == zone.startDay
|
|
&& startDayOfWeek == zone.startDayOfWeek
|
|
&& startTime == zone.startTime
|
|
&& endMonth == zone.endMonth
|
|
&& endDay == zone.endDay
|
|
&& endDayOfWeek == zone.endDayOfWeek
|
|
&& endTime == zone.endTime);
|
|
}
|
|
|
|
/**
|
|
* Test if the other time zone uses the same rule and only
|
|
* possibly differs in ID. This implementation for this particular
|
|
* class will return true if the other object is a SimpleTimeZone,
|
|
* the raw offsets and useDaylight are identical and if useDaylight
|
|
* is true, also the start and end datas are identical.
|
|
* @return true if this zone uses the same rule.
|
|
*/
|
|
public boolean hasSameRules(TimeZone other)
|
|
{
|
|
if (this == other)
|
|
return true;
|
|
if (!(other instanceof SimpleTimeZone))
|
|
return false;
|
|
SimpleTimeZone zone = (SimpleTimeZone) other;
|
|
if (zone.hashCode() != hashCode()
|
|
|| rawOffset != zone.rawOffset || useDaylight != zone.useDaylight)
|
|
return false;
|
|
if (!useDaylight)
|
|
return true;
|
|
return (startYear == zone.startYear
|
|
&& startMonth == zone.startMonth
|
|
&& startDay == zone.startDay
|
|
&& startDayOfWeek == zone.startDayOfWeek
|
|
&& startTime == zone.startTime
|
|
&& endMonth == zone.endMonth
|
|
&& endDay == zone.endDay
|
|
&& endDayOfWeek == zone.endDayOfWeek && endTime == zone.endTime);
|
|
}
|
|
|
|
/**
|
|
* Returns a string representation of this SimpleTimeZone object.
|
|
* @return a string representation of this SimpleTimeZone object.
|
|
*/
|
|
public String toString()
|
|
{
|
|
// the test for useDaylight is an incompatibility to jdk1.2, but
|
|
// I think this shouldn't hurt.
|
|
return getClass().getName() + "["
|
|
+ "id=" + getID()
|
|
+ ",offset=" + rawOffset
|
|
+ ",dstSavings=" + dstSavings
|
|
+ ",useDaylight=" + useDaylight
|
|
+ (useDaylight ?
|
|
",startYear=" + startYear
|
|
+ ",startMode=" + startMode
|
|
+ ",startMonth=" + startMonth
|
|
+ ",startDay=" + startDay
|
|
+ ",startDayOfWeek=" + startDayOfWeek
|
|
+ ",startTime=" + startTime
|
|
+ ",endMode=" + endMode
|
|
+ ",endMonth=" + endMonth
|
|
+ ",endDay=" + endDay
|
|
+ ",endDayOfWeek=" + endDayOfWeek
|
|
+ ",endTime=" + endTime : "") + "]";
|
|
}
|
|
|
|
/**
|
|
* Reads a serialized simple time zone from stream.
|
|
* @see #writeObject
|
|
*/
|
|
private void readObject(java.io.ObjectInputStream input)
|
|
throws java.io.IOException, ClassNotFoundException
|
|
{
|
|
input.defaultReadObject();
|
|
if (serialVersionOnStream == 0)
|
|
{
|
|
// initialize the new fields to default values.
|
|
dstSavings = 60 * 60 * 1000;
|
|
endMode = DOW_IN_MONTH_MODE;
|
|
startMode = DOW_IN_MONTH_MODE;
|
|
serialVersionOnStream = 1;
|
|
}
|
|
else
|
|
{
|
|
int length = input.readInt();
|
|
byte[] byteArray = new byte[length];
|
|
input.read(byteArray, 0, length);
|
|
if (length >= 4)
|
|
{
|
|
// Lets hope that Sun does extensions to the serialized
|
|
// form in a sane manner.
|
|
startDay = byteArray[0];
|
|
startDayOfWeek = byteArray[1];
|
|
endDay = byteArray[2];
|
|
endDayOfWeek = byteArray[3];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Serializes this object to a stream. @serialdata The object is
|
|
* first written in the old JDK 1.1 format, so that it can be read
|
|
* by by the old classes. This means, that the
|
|
* <code>start/endDay(OfWeek)</code>-Fields are written in the
|
|
* DOW_IN_MONTH_MODE rule, since this was the only supported rule
|
|
* in 1.1.
|
|
*
|
|
* In the optional section, we write first the length of an byte
|
|
* array as int and afterwards the byte array itself. The byte
|
|
* array contains in this release four elements, namely the real
|
|
* startDay, startDayOfWeek endDay, endDayOfWeek in that Order.
|
|
* These fields are needed, because for compatibility reasons only
|
|
* approximative values are written to the required section, as
|
|
* described above.
|
|
*/
|
|
private void writeObject(java.io.ObjectOutputStream output)
|
|
throws java.io.IOException
|
|
{
|
|
byte[] byteArray = new byte[]
|
|
{
|
|
(byte) startDay, (byte) startDayOfWeek,
|
|
(byte) endDay, (byte) endDayOfWeek};
|
|
|
|
/* calculate the approximation for JDK 1.1 */
|
|
switch (startMode)
|
|
{
|
|
case DOM_MODE:
|
|
startDayOfWeek = Calendar.SUNDAY; // random day of week
|
|
// fall through
|
|
case DOW_GE_DOM_MODE:
|
|
case DOW_LE_DOM_MODE:
|
|
startDay = (startDay + 6) / 7;
|
|
}
|
|
switch (endMode)
|
|
{
|
|
case DOM_MODE:
|
|
endDayOfWeek = Calendar.SUNDAY;
|
|
// fall through
|
|
case DOW_GE_DOM_MODE:
|
|
case DOW_LE_DOM_MODE:
|
|
endDay = (endDay + 6) / 7;
|
|
}
|
|
|
|
// the required part:
|
|
output.defaultWriteObject();
|
|
// the optional part:
|
|
output.writeInt(byteArray.length);
|
|
output.write(byteArray, 0, byteArray.length);
|
|
}
|
|
}
|