| /* |
| * @(#)SimpleTimeZone.java 1.38 00/01/19 |
| * |
| * Copyright 1996-2000 Sun Microsystems, Inc. All Rights Reserved. |
| * |
| * This software is the proprietary information of Sun Microsystems, Inc. |
| * Use is subject to license terms. |
| * |
| */ |
| |
| /* |
| * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved |
| * (C) Copyright IBM Corp. 1996 - All Rights Reserved |
| * |
| * The original version of this source code and documentation is copyrighted |
| * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These |
| * materials are provided under terms of a License Agreement between Taligent |
| * and Sun. This technology is protected by multiple US and International |
| * patents. This notice and attribution to Taligent may not be removed. |
| * Taligent is a registered trademark of Taligent, Inc. |
| * |
| */ |
| |
| package com.ibm.util; |
| |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.IOException; |
| import java.util.Date; |
| |
| /** |
| * <code>SimpleTimeZone</code> is a concrete subclass of <code>TimeZone</code> |
| * that represents a time zone for use with a Gregorian calendar. This |
| * class does not handle historical changes. |
| * |
| * <P> |
| * Use a negative value for <code>dayOfWeekInMonth</code> to indicate that |
| * <code>SimpleTimeZone</code> should count from the end of the month backwards. |
| * For example, Daylight Savings Time ends at the last |
| * (dayOfWeekInMonth = -1) Sunday in October, at 2 AM in standard time. |
| * |
| * @see Calendar |
| * @see GregorianCalendar |
| * @see TimeZone |
| * @version 1.38 01/19/00 |
| * @author David Goldsmith, Mark Davis, Chen-Lieh Huang, Alan Liu |
| */ |
| public class SimpleTimeZone extends TimeZone { |
| /** |
| * Constructs a SimpleTimeZone with the given base time zone offset from GMT |
| * and time zone ID. Timezone IDs can be obtained from |
| * TimeZone.getAvailableIDs. Normally you should use TimeZone.getDefault to |
| * construct a TimeZone. |
| * |
| * @param rawOffset The given base time zone offset to GMT. |
| * @param ID The time zone ID which is obtained from |
| * TimeZone.getAvailableIDs. |
| */ |
| public SimpleTimeZone(int rawOffset, String ID) |
| { |
| this.rawOffset = rawOffset; |
| setID (ID); |
| dstSavings = millisPerHour; // In case user sets rules later |
| } |
| |
| /** |
| * Construct a SimpleTimeZone with the given base time zone offset from |
| * GMT, time zone ID, time to start and end the daylight time. Timezone IDs |
| * can be obtained from TimeZone.getAvailableIDs. Normally you should use |
| * TimeZone.getDefault to create a TimeZone. For a time zone that does not |
| * use daylight saving time, do not use this constructor; instead you should |
| * use SimpleTimeZone(rawOffset, ID). |
| * |
| * By default, this constructor specifies day-of-week-in-month rules. That |
| * is, if the startDay is 1, and the startDayOfWeek is SUNDAY, then this |
| * indicates the first Sunday in the startMonth. A startDay of -1 likewise |
| * indicates the last Sunday. However, by using negative or zero values for |
| * certain parameters, other types of rules can be specified. |
| * |
| * Day of month. To specify an exact day of the month, such as March 1, set |
| * startDayOfWeek to zero. |
| * |
| * Day of week after day of month. To specify the first day of the week |
| * occurring on or after an exact day of the month, make the day of the week |
| * negative. For example, if startDay is 5 and startDayOfWeek is -MONDAY, |
| * this indicates the first Monday on or after the 5th day of the |
| * startMonth. |
| * |
| * Day of week before day of month. To specify the last day of the week |
| * occurring on or before an exact day of the month, make the day of the |
| * week and the day of the month negative. For example, if startDay is -21 |
| * and startDayOfWeek is -WEDNESDAY, this indicates the last Wednesday on or |
| * before the 21st of the startMonth. |
| * |
| * The above examples refer to the startMonth, startDay, and startDayOfWeek; |
| * the same applies for the endMonth, endDay, and endDayOfWeek. |
| * |
| * @param rawOffset The given base time zone offset to GMT. |
| * @param ID The time zone ID which is obtained from |
| * TimeZone.getAvailableIDs. |
| * @param startMonth The daylight savings starting month. Month is |
| * 0-based. eg, 0 for January. |
| * @param startDay The daylight savings starting |
| * day-of-week-in-month. Please see the member |
| * description for an example. |
| * @param startDayOfWeek The daylight savings starting day-of-week. Please |
| * see the member description for an example. |
| * @param startTime The daylight savings starting time in local wall |
| * time, which is standard time in this case. Please see the |
| * member description for an example. |
| * @param endMonth The daylight savings ending month. Month is |
| * 0-based. eg, 0 for January. |
| * @param endDay The daylight savings ending day-of-week-in-month. |
| * Please see the member description for an example. |
| * @param endDayOfWeek The daylight savings ending day-of-week. Please |
| * see the member description for an example. |
| * @param endTime The daylight savings ending time in local wall time, |
| * which is daylight time in this case. Please see the |
| * member description for an example. |
| * @exception IllegalArgumentException the month, day, dayOfWeek, or time |
| * parameters are out of range for the start or end rule |
| * @since JDK1.1 |
| */ |
| public SimpleTimeZone(int rawOffset, String ID, |
| int startMonth, int startDay, int startDayOfWeek, int startTime, |
| int endMonth, int endDay, int endDayOfWeek, int endTime) |
| { |
| this(rawOffset, ID, |
| startMonth, startDay, startDayOfWeek, startTime, WALL_TIME, |
| endMonth, endDay, endDayOfWeek, endTime, WALL_TIME, |
| millisPerHour); |
| } |
| |
| /** |
| * Constructor. This constructor is identical to the 10-argument |
| * constructor, but also takes a dstSavings parameter. |
| * @param dstSavings The amount of time in ms saved during DST. |
| * @exception IllegalArgumentException the month, day, dayOfWeek, or time |
| * parameters are out of range for the start or end rule |
| * @since 1.2 |
| */ |
| public SimpleTimeZone(int rawOffset, String ID, |
| int startMonth, int startDay, int startDayOfWeek, int startTime, |
| int endMonth, int endDay, int endDayOfWeek, int endTime, |
| int dstSavings) |
| { |
| this(rawOffset, ID, |
| startMonth, startDay, startDayOfWeek, startTime, WALL_TIME, |
| endMonth, endDay, endDayOfWeek, endTime, WALL_TIME, |
| dstSavings); |
| } |
| |
| /** |
| * Constructor. |
| */ |
| SimpleTimeZone(int rawOffset, String ID, |
| int startMonth, int startDay, int startDayOfWeek, |
| int startTime, int startTimeMode, |
| int endMonth, int endDay, int endDayOfWeek, |
| int endTime, int endTimeMode, |
| int dstSavings) { |
| setID(ID); |
| this.rawOffset = rawOffset; |
| this.startMonth = startMonth; |
| this.startDay = startDay; |
| this.startDayOfWeek = startDayOfWeek; |
| this.startTime = startTime; |
| this.startTimeMode = startTimeMode; |
| this.endMonth = endMonth; |
| this.endDay = endDay; |
| this.endDayOfWeek = endDayOfWeek; |
| this.endTime = endTime; |
| this.endTimeMode = endTimeMode; |
| this.dstSavings = dstSavings; |
| // this.useDaylight = true; // Set by decodeRules |
| decodeRules(); |
| if (dstSavings <= 0) { |
| throw new IllegalArgumentException("Illegal DST savings"); |
| } |
| } |
| |
| /** |
| * Constructor for TimeZoneData. Takes as input an array and an index |
| * into the array. The array format is that of TimeZoneData.DATA. |
| */ |
| SimpleTimeZone(String ID, int[] data, int i) { |
| setID(ID); |
| rawOffset = data[i+1]*1000; |
| if (data[i] == 0) { |
| dstSavings = millisPerHour; // In case user sets rules later |
| } else { |
| startMonth = data[i+2]; |
| startDay = data[i+3]; |
| startDayOfWeek = data[i+4]; |
| startTime = data[i+5]*60000; |
| startTimeMode = data[i+6]; |
| endMonth = data[i+7]; |
| endDay = data[i+8]; |
| endDayOfWeek = data[i+9]; |
| endTime = data[i+10]*60000; |
| endTimeMode = data[i+11]; |
| dstSavings = data[i+12]*60000; |
| decodeRules(); |
| if (dstSavings <= 0) { |
| throw new IllegalArgumentException("Illegal DST savings"); |
| } |
| } |
| } |
| |
| /** |
| * Sets the daylight savings starting year. |
| * |
| * @param year The daylight savings starting year. |
| */ |
| public void setStartYear(int year) |
| { |
| startYear = year; |
| } |
| |
| /** |
| * Sets the daylight savings starting rule. For example, Daylight Savings |
| * Time starts at the first Sunday in April, at 2 AM in standard time. |
| * Therefore, you can set the start rule by calling: |
| * setStartRule(TimeFields.APRIL, 1, TimeFields.SUNDAY, 2*60*60*1000); |
| * |
| * @param month The daylight savings starting month. Month is |
| * 0-based. eg, 0 for January. |
| * @param dayOfWeekInMonth The daylight savings starting |
| * day-of-week-in-month. Please see the member |
| * description for an example. |
| * @param dayOfWeek The daylight savings starting day-of-week. |
| * Please see the member description for an |
| * example. |
| * @param time The daylight savings starting time in local wall |
| * time, which is standard time in this case. Please see |
| * the member description for an example. |
| * @exception IllegalArgumentException the month, dayOfWeekInMonth, |
| * dayOfWeek, or time parameters are out of range |
| */ |
| public void setStartRule(int month, int dayOfWeekInMonth, int dayOfWeek, |
| int time) |
| { |
| startMonth = month; |
| startDay = dayOfWeekInMonth; |
| startDayOfWeek = dayOfWeek; |
| startTime = time; |
| startTimeMode = WALL_TIME; |
| // useDaylight = true; // Set by decodeRules |
| decodeStartRule(); |
| } |
| |
| /** |
| * Sets the DST start rule to a fixed date within a month. |
| * |
| * @param month The month in which this rule occurs (0-based). |
| * @param dayOfMonth The date in that month (1-based). |
| * @param time The time of that day (number of millis after midnight) |
| * when DST takes effect in local wall time, which is |
| * standard time in this case. |
| * @exception IllegalArgumentException the month, |
| * dayOfMonth, or time parameters are out of range |
| * @since 1.2 |
| */ |
| public void setStartRule(int month, int dayOfMonth, int time) { |
| setStartRule(month, dayOfMonth, 0, time); |
| } |
| |
| /** |
| * Sets the DST start rule to a weekday before or after a give date within |
| * a month, e.g., the first Monday on or after the 8th. |
| * |
| * @param month The month in which this rule occurs (0-based). |
| * @param dayOfMonth A date within that month (1-based). |
| * @param dayOfWeek The day of the week on which this rule occurs. |
| * @param time The time of that day (number of millis after midnight) |
| * when DST takes effect in local wall time, which is |
| * standard time in this case. |
| * @param after If true, this rule selects the first dayOfWeek on |
| * or after dayOfMonth. If false, this rule selects |
| * the last dayOfWeek on or before dayOfMonth. |
| * @exception IllegalArgumentException the month, dayOfMonth, |
| * dayOfWeek, or time parameters are out of range |
| * @since 1.2 |
| */ |
| public void setStartRule(int month, int dayOfMonth, int dayOfWeek, int time, boolean after) |
| { |
| if (after) |
| setStartRule(month, dayOfMonth, -dayOfWeek, time); |
| else |
| setStartRule(month, -dayOfMonth, -dayOfWeek, time); |
| } |
| |
| /** |
| * Sets the daylight savings ending rule. For example, Daylight Savings Time |
| * ends at the last (-1) Sunday in October, at 2 AM in standard time. |
| * Therefore, you can set the end rule by calling: |
| * setEndRule(TimeFields.OCTOBER, -1, TimeFields.SUNDAY, 2*60*60*1000); |
| * |
| * @param month The daylight savings ending month. Month is |
| * 0-based. eg, 0 for January. |
| * @param dayOfWeekInMonth The daylight savings ending |
| * day-of-week-in-month. Please see the member |
| * description for an example. |
| * @param dayOfWeek The daylight savings ending day-of-week. Please |
| * see the member description for an example. |
| * @param time The daylight savings ending time in local wall time, |
| * which is daylight time in this case. Please see the |
| * member description for an example. |
| * @exception IllegalArgumentException the month, dayOfWeekInMonth, |
| * dayOfWeek, or time parameters are out of range |
| */ |
| public void setEndRule(int month, int dayOfWeekInMonth, int dayOfWeek, |
| int time) |
| { |
| endMonth = month; |
| endDay = dayOfWeekInMonth; |
| endDayOfWeek = dayOfWeek; |
| endTime = time; |
| endTimeMode = WALL_TIME; |
| // useDaylight = true; // Set by decodeRules |
| decodeEndRule(); |
| } |
| |
| /** |
| * Sets the DST end rule to a fixed date within a month. |
| * |
| * @param month The month in which this rule occurs (0-based). |
| * @param dayOfMonth The date in that month (1-based). |
| * @param time The time of that day (number of millis after midnight) |
| * when DST ends in local wall time, which is daylight |
| * time in this case. |
| * @exception IllegalArgumentException the month, |
| * dayOfMonth, or time parameters are out of range |
| * @since 1.2 |
| */ |
| public void setEndRule(int month, int dayOfMonth, int time) |
| { |
| setEndRule(month, dayOfMonth, 0, time); |
| } |
| |
| /** |
| * Sets the DST end rule to a weekday before or after a give date within |
| * a month, e.g., the first Monday on or after the 8th. |
| * |
| * @param month The month in which this rule occurs (0-based). |
| * @param dayOfMonth A date within that month (1-based). |
| * @param dayOfWeek The day of the week on which this rule occurs. |
| * @param time The time of that day (number of millis after midnight) |
| * when DST ends in local wall time, which is daylight |
| * time in this case. |
| * @param after If true, this rule selects the first dayOfWeek on |
| * or after dayOfMonth. If false, this rule selects |
| * the last dayOfWeek on or before dayOfMonth. |
| * @exception IllegalArgumentException the month, dayOfMonth, |
| * dayOfWeek, or time parameters are out of range |
| * @since 1.2 |
| */ |
| public void setEndRule(int month, int dayOfMonth, int dayOfWeek, int time, boolean after) |
| { |
| if (after) |
| setEndRule(month, dayOfMonth, -dayOfWeek, time); |
| else |
| setEndRule(month, -dayOfMonth, -dayOfWeek, time); |
| } |
| |
| /** |
| * Returns the difference in milliseconds between local time and |
| * UTC, taking into account both the raw offset and the effect of |
| * daylight savings, for the specified date and time. This method |
| * assumes that the start and end month are distinct. It also |
| * uses a default {@link GregorianCalendar} object as its |
| * underlying calendar, such as for determining leap years. Do |
| * not use the result of this method with a calendar other than a |
| * default <code>GregorianCalendar</code>. |
| * |
| * <p><em>Note: In general, clients should use |
| * <code>Calendar.get(ZONE_OFFSET) + Calendar.get(DST_OFFSET)</code> |
| * instead of calling this method.</em> |
| * |
| * @param era The era of the given date. |
| * @param year The year in the given date. |
| * @param month The month in the given date. Month is 0-based. e.g., |
| * 0 for January. |
| * @param day The day-in-month of the given date. |
| * @param dayOfWeek The day-of-week of the given date. |
| * @param millis The milliseconds in day in <em>standard</em> local time. |
| * @return The milliseconds to add to UTC to get local time. |
| * @exception IllegalArgumentException the era, month, day, |
| * dayOfWeek, or millis parameters are out of range |
| */ |
| public int getOffset(int era, int year, int month, int day, int dayOfWeek, |
| int millis) |
| { |
| // Check the month before indexing into staticMonthLength. This |
| // duplicates the test that occurs in the 7-argument getOffset(), |
| // however, this is unavoidable. We don't mind because this method, in |
| // fact, should not be called; internal code should always call the |
| // 7-argument getOffset(), and outside code should use Calendar.get(int |
| // field) with fields ZONE_OFFSET and DST_OFFSET. We can't get rid of |
| // this method because it's public API. - liu 8/10/98 |
| if (month < Calendar.JANUARY |
| || month > Calendar.DECEMBER) { |
| throw new IllegalArgumentException("Illegal month " + month); |
| } |
| int monthLength, prevMonthLength; |
| if ((era == GregorianCalendar.AD) && internalCal.isLeapYear(year)) { |
| monthLength = staticLeapMonthLength[month]; |
| prevMonthLength = (month > 1) ? staticLeapMonthLength[month - 1] : 31; |
| } else { |
| monthLength = staticMonthLength[month]; |
| prevMonthLength = (month > 1) ? staticMonthLength[month - 1] : 31; |
| } |
| |
| return getOffset(era, year, month, day, dayOfWeek, millis, |
| monthLength, prevMonthLength); |
| } |
| |
| /** |
| * Gets offset, for current date, modified in case of |
| * daylight savings. This is the offset to add <em>to</em> UTC to get local time. |
| * Gets the time zone offset, for current date, modified in case of daylight |
| * savings. This is the offset to add *to* UTC to get local time. Assume |
| * that the start and end month are distinct. |
| * @param era The era of the given date. |
| * @param year The year in the given date. |
| * @param month The month in the given date. Month is 0-based. e.g., |
| * 0 for January. |
| * @param day The day-in-month of the given date. |
| * @param dayOfWeek The day-of-week of the given date. |
| * @param millis The milliseconds in day in <em>standard</em> local time. |
| * @param monthLength The length of the given month in days. |
| * @param prevMonthLength The length of the previous month in days. |
| * @return The offset to add *to* GMT to get local time. |
| * @exception IllegalArgumentException the era, month, day, |
| * dayOfWeek, millis, or monthLength parameters are out of range |
| */ |
| int getOffset(int era, int year, int month, int day, int dayOfWeek, |
| int millis, int monthLength, int prevMonthLength) { |
| if (false) { |
| /* Use this parameter checking code for normal operation. Only one |
| * of these two blocks should actually get compiled into the class |
| * file. */ |
| if ((era != GregorianCalendar.AD && era != GregorianCalendar.BC) |
| || month < Calendar.JANUARY |
| || month > Calendar.DECEMBER |
| || day < 1 |
| || day > monthLength |
| || dayOfWeek < Calendar.SUNDAY |
| || dayOfWeek > Calendar.SATURDAY |
| || millis < 0 |
| || millis >= millisPerDay |
| || monthLength < 28 |
| || monthLength > 31 |
| || prevMonthLength < 28 |
| || prevMonthLength > 31) { |
| throw new IllegalArgumentException(); |
| } |
| } else { |
| /* This parameter checking code is better for debugging, but |
| * overkill for normal operation. Only one of these two blocks |
| * should actually get compiled into the class file. */ |
| if (era != GregorianCalendar.AD && era != GregorianCalendar.BC) { |
| throw new IllegalArgumentException("Illegal era " + era); |
| } |
| if (month < Calendar.JANUARY |
| || month > Calendar.DECEMBER) { |
| throw new IllegalArgumentException("Illegal month " + month); |
| } |
| if (day < 1 |
| || day > monthLength) { |
| throw new IllegalArgumentException("Illegal day " + day); |
| } |
| if (dayOfWeek < Calendar.SUNDAY |
| || dayOfWeek > Calendar.SATURDAY) { |
| throw new IllegalArgumentException("Illegal day of week " + dayOfWeek); |
| } |
| if (millis < 0 |
| || millis >= millisPerDay) { |
| throw new IllegalArgumentException("Illegal millis " + millis); |
| } |
| if (monthLength < 28 |
| || monthLength > 31) { |
| throw new IllegalArgumentException("Illegal month length " + monthLength); |
| } |
| if (prevMonthLength < 28 |
| || prevMonthLength > 31) { |
| throw new IllegalArgumentException("Illegal previous month length " + prevMonthLength); |
| } |
| } |
| |
| int result = rawOffset; |
| |
| // Bail out if we are before the onset of daylight savings time |
| if (!useDaylight || year < startYear || era != GregorianCalendar.AD) return result; |
| |
| // Check for southern hemisphere. We assume that the start and end |
| // month are different. |
| boolean southern = (startMonth > endMonth); |
| |
| // Compare the date to the starting and ending rules.+1 = date>rule, -1 |
| // = date<rule, 0 = date==rule. |
| int startCompare = compareToRule(month, monthLength, prevMonthLength, |
| day, dayOfWeek, millis, |
| startTimeMode == UTC_TIME ? -rawOffset : 0, |
| startMode, startMonth, startDayOfWeek, |
| startDay, startTime); |
| int endCompare = 0; |
| |
| /* We don't always have to compute endCompare. For many instances, |
| * startCompare is enough to determine if we are in DST or not. In the |
| * northern hemisphere, if we are before the start rule, we can't have |
| * DST. In the southern hemisphere, if we are after the start rule, we |
| * must have DST. This is reflected in the way the next if statement |
| * (not the one immediately following) short circuits. */ |
| if (southern != (startCompare >= 0)) { |
| /* For the ending rule comparison, we add the dstSavings to the millis |
| * passed in to convert them from standard to wall time. We then must |
| * normalize the millis to the range 0..millisPerDay-1. */ |
| endCompare = compareToRule(month, monthLength, prevMonthLength, |
| day, dayOfWeek, millis, |
| endTimeMode == WALL_TIME ? dstSavings : |
| (endTimeMode == UTC_TIME ? -rawOffset : 0), |
| endMode, endMonth, endDayOfWeek, |
| endDay, endTime); |
| } |
| |
| // Check for both the northern and southern hemisphere cases. We |
| // assume that in the northern hemisphere, the start rule is before the |
| // end rule within the calendar year, and vice versa for the southern |
| // hemisphere. |
| if ((!southern && (startCompare >= 0 && endCompare < 0)) || |
| (southern && (startCompare >= 0 || endCompare < 0))) |
| result += dstSavings; |
| |
| return result; |
| } |
| |
| /** |
| * Compare a given date in the year to a rule. Return 1, 0, or -1, depending |
| * on whether the date is after, equal to, or before the rule date. The |
| * millis are compared directly against the ruleMillis, so any |
| * standard-daylight adjustments must be handled by the caller. |
| * |
| * @return 1 if the date is after the rule date, -1 if the date is before |
| * the rule date, or 0 if the date is equal to the rule date. |
| */ |
| private static int compareToRule(int month, int monthLen, int prevMonthLen, |
| int dayOfMonth, |
| int dayOfWeek, int millis, int millisDelta, |
| int ruleMode, int ruleMonth, int ruleDayOfWeek, |
| int ruleDay, int ruleMillis) |
| { |
| // Make adjustments for startTimeMode and endTimeMode |
| millis += millisDelta; |
| while (millis >= millisPerDay) { |
| millis -= millisPerDay; |
| ++dayOfMonth; |
| dayOfWeek = 1 + (dayOfWeek % 7); // dayOfWeek is one-based |
| if (dayOfMonth > monthLen) { |
| dayOfMonth = 1; |
| /* When incrementing the month, it is desirible to overflow |
| * from DECEMBER to DECEMBER+1, since we use the result to |
| * compare against a real month. Wraparound of the value |
| * leads to bug 4173604. */ |
| ++month; |
| } |
| } |
| while (millis < 0) { |
| millis += millisPerDay; |
| --dayOfMonth; |
| dayOfWeek = 1 + ((dayOfWeek+5) % 7); // dayOfWeek is one-based |
| if (dayOfMonth < 1) { |
| dayOfMonth = prevMonthLen; |
| --month; |
| } |
| } |
| |
| if (month < ruleMonth) return -1; |
| else if (month > ruleMonth) return 1; |
| |
| int ruleDayOfMonth = 0; |
| switch (ruleMode) |
| { |
| case DOM_MODE: |
| ruleDayOfMonth = ruleDay; |
| break; |
| case DOW_IN_MONTH_MODE: |
| // In this case ruleDay is the day-of-week-in-month |
| if (ruleDay > 0) |
| ruleDayOfMonth = 1 + (ruleDay - 1) * 7 + |
| (7 + ruleDayOfWeek - (dayOfWeek - dayOfMonth + 1)) % 7; |
| else // Assume ruleDay < 0 here |
| { |
| ruleDayOfMonth = monthLen + (ruleDay + 1) * 7 - |
| (7 + (dayOfWeek + monthLen - dayOfMonth) - ruleDayOfWeek) % 7; |
| } |
| break; |
| case DOW_GE_DOM_MODE: |
| ruleDayOfMonth = ruleDay + |
| (49 + ruleDayOfWeek - ruleDay - dayOfWeek + dayOfMonth) % 7; |
| break; |
| case DOW_LE_DOM_MODE: |
| ruleDayOfMonth = ruleDay - |
| (49 - ruleDayOfWeek + ruleDay + dayOfWeek - dayOfMonth) % 7; |
| // Note at this point ruleDayOfMonth may be <1, although it will |
| // be >=1 for well-formed rules. |
| break; |
| } |
| |
| if (dayOfMonth < ruleDayOfMonth) return -1; |
| else if (dayOfMonth > ruleDayOfMonth) return 1; |
| |
| if (millis < ruleMillis) return -1; |
| else if (millis > ruleMillis) return 1; |
| else return 0; |
| } |
| |
| /** |
| * Overrides TimeZone |
| * Gets the GMT offset for this time zone. |
| */ |
| public int getRawOffset() |
| { |
| // The given date will be taken into account while |
| // we have the historical time zone data in place. |
| return rawOffset; |
| } |
| |
| /** |
| * Overrides TimeZone |
| * Sets the base time zone offset to GMT. |
| * This is the offset to add *to* UTC to get local time. |
| * Please see TimeZone.setRawOffset for descriptions on the parameter. |
| */ |
| public void setRawOffset(int offsetMillis) |
| { |
| this.rawOffset = offsetMillis; |
| } |
| |
| /** |
| * Sets the amount of time in ms that the clock is advanced during DST. |
| * @param millisSavedDuringDST the number of milliseconds the time is |
| * advanced with respect to standard time when the daylight savings rules |
| * are in effect. A positive number, typically one hour (3600000). |
| * @since 1.2 |
| */ |
| public void setDSTSavings(int millisSavedDuringDST) { |
| if (millisSavedDuringDST <= 0) { |
| throw new IllegalArgumentException("Illegal DST savings"); |
| } |
| dstSavings = millisSavedDuringDST; |
| } |
| |
| /** |
| * Returns the amount of time in ms that the clock is advanced during DST. |
| * @return the number of milliseconds the time is |
| * advanced with respect to standard time when the daylight savings rules |
| * are in effect. A positive number, typically one hour (3600000). |
| * @since 1.2 |
| */ |
| public int getDSTSavings() { |
| return dstSavings; |
| } |
| |
| /** |
| * Overrides TimeZone |
| * Queries if this time zone uses Daylight Savings Time. |
| */ |
| public boolean useDaylightTime() |
| { |
| return useDaylight; |
| } |
| |
| /** |
| * Overrides TimeZone |
| * Queries if the given date is in Daylight Savings Time. |
| */ |
| public boolean inDaylightTime(Date date) |
| { |
| GregorianCalendar gc = new GregorianCalendar(this); |
| gc.setTime(date); |
| return gc.inDaylightTime(); |
| } |
| |
| /** |
| * Overrides Cloneable |
| */ |
| public Object clone() |
| { |
| return super.clone(); |
| // other fields are bit-copied |
| } |
| |
| /** |
| * Override hashCode. |
| * Generates the hash code for the SimpleDateFormat object |
| */ |
| public synchronized int hashCode() |
| { |
| return startMonth ^ startDay ^ startDayOfWeek ^ startTime ^ |
| endMonth ^ endDay ^ endDayOfWeek ^ endTime ^ rawOffset; |
| } |
| |
| /** |
| * Compares the equality of two SimpleTimeZone objects. |
| * |
| * @param obj The SimpleTimeZone object to be compared with. |
| * @return True if the given obj is the same as this SimpleTimeZone |
| * object; false otherwise. |
| */ |
| public boolean equals(Object obj) |
| { |
| if (this == obj) |
| return true; |
| if (!(obj instanceof SimpleTimeZone)) |
| return false; |
| |
| SimpleTimeZone that = (SimpleTimeZone) obj; |
| |
| return getID().equals(that.getID()) && |
| hasSameRules(that); |
| } |
| |
| /** |
| * Return true if this zone has the same rules and offset as another zone. |
| * @param other the TimeZone object to be compared with |
| * @return true if the given zone has the same rules and offset as this one |
| * @since 1.2 |
| */ |
| public boolean hasSameRules(TimeZone other) { |
| if (this == other) return true; |
| if (!(other instanceof SimpleTimeZone)) return false; |
| SimpleTimeZone that = (SimpleTimeZone) other; |
| return rawOffset == that.rawOffset && |
| useDaylight == that.useDaylight && |
| (!useDaylight |
| // Only check rules if using DST |
| || (dstSavings == that.dstSavings && |
| startMode == that.startMode && |
| startMonth == that.startMonth && |
| startDay == that.startDay && |
| startDayOfWeek == that.startDayOfWeek && |
| startTime == that.startTime && |
| startTimeMode == that.startTimeMode && |
| endMode == that.endMode && |
| endMonth == that.endMonth && |
| endDay == that.endDay && |
| endDayOfWeek == that.endDayOfWeek && |
| endTime == that.endTime && |
| endTimeMode == that.endTimeMode && |
| startYear == that.startYear)); |
| } |
| |
| /** |
| * Return a string representation of this time zone. |
| * @return a string representation of this time zone. |
| */ |
| public String toString() { |
| return getClass().getName() + |
| "[id=" + getID() + |
| ",offset=" + rawOffset + |
| ",dstSavings=" + dstSavings + |
| ",useDaylight=" + useDaylight + |
| ",startYear=" + startYear + |
| ",startMode=" + startMode + |
| ",startMonth=" + startMonth + |
| ",startDay=" + startDay + |
| ",startDayOfWeek=" + startDayOfWeek + |
| ",startTime=" + startTime + |
| ",startTimeMode=" + startTimeMode + |
| ",endMode=" + endMode + |
| ",endMonth=" + endMonth + |
| ",endDay=" + endDay + |
| ",endDayOfWeek=" + endDayOfWeek + |
| ",endTime=" + endTime + |
| ",endTimeMode=" + endTimeMode + ']'; |
| } |
| |
| // =======================privates=============================== |
| |
| /** |
| * The month in which daylight savings time starts. This value must be |
| * between <code>Calendar.JANUARY</code> and |
| * <code>Calendar.DECEMBER</code> inclusive. This value must not equal |
| * <code>endMonth</code>. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int startMonth; |
| |
| /** |
| * This field has two possible interpretations: |
| * <dl> |
| * <dt><code>startMode == DOW_IN_MONTH</code></dt> |
| * <dd> |
| * <code>startDay</code> indicates the day of the month of |
| * <code>startMonth</code> on which daylight |
| * savings time starts, from 1 to 28, 30, or 31, depending on the |
| * <code>startMonth</code>. |
| * </dd> |
| * <dt><code>startMode != DOW_IN_MONTH</code></dt> |
| * <dd> |
| * <code>startDay</code> indicates which <code>startDayOfWeek</code> in th |
| * month <code>startMonth</code> daylight |
| * savings time starts on. For example, a value of +1 and a |
| * <code>startDayOfWeek</code> of <code>Calendar.SUNDAY</code> indicates the |
| * first Sunday of <code>startMonth</code>. Likewise, +2 would indicate the |
| * second Sunday, and -1 the last Sunday. A value of 0 is illegal. |
| * </dd> |
| * </ul> |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int startDay; |
| |
| /** |
| * The day of the week on which daylight savings time starts. This value |
| * must be between <code>Calendar.SUNDAY</code> and |
| * <code>Calendar.SATURDAY</code> inclusive. |
| * <p>If <code>useDaylight</code> is false or |
| * <code>startMode == DAY_OF_MONTH</code>, this value is ignored. |
| * @serial |
| */ |
| private int startDayOfWeek; |
| |
| /** |
| * The time in milliseconds after midnight at which daylight savings |
| * time starts. This value is expressed as wall time, standard time, |
| * or UTC time, depending on the setting of <code>startTimeMode</code>. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int startTime; |
| |
| /** |
| * The format of startTime, either WALL_TIME, STANDARD_TIME, or UTC_TIME. |
| * @serial |
| * @since JDK 1.3 |
| */ |
| private int startTimeMode; |
| |
| /** |
| * The month in which daylight savings time ends. This value must be |
| * between <code>Calendar.JANUARY</code> and |
| * <code>Calendar.UNDECIMBER</code>. This value must not equal |
| * <code>startMonth</code>. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int endMonth; |
| |
| /** |
| * This field has two possible interpretations: |
| * <dl> |
| * <dt><code>endMode == DOW_IN_MONTH</code></dt> |
| * <dd> |
| * <code>endDay</code> indicates the day of the month of |
| * <code>endMonth</code> on which daylight |
| * savings time ends, from 1 to 28, 30, or 31, depending on the |
| * <code>endMonth</code>. |
| * </dd> |
| * <dt><code>endMode != DOW_IN_MONTH</code></dt> |
| * <dd> |
| * <code>endDay</code> indicates which <code>endDayOfWeek</code> in th |
| * month <code>endMonth</code> daylight |
| * savings time ends on. For example, a value of +1 and a |
| * <code>endDayOfWeek</code> of <code>Calendar.SUNDAY</code> indicates the |
| * first Sunday of <code>endMonth</code>. Likewise, +2 would indicate the |
| * second Sunday, and -1 the last Sunday. A value of 0 is illegal. |
| * </dd> |
| * </ul> |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int endDay; |
| |
| /** |
| * The day of the week on which daylight savings time ends. This value |
| * must be between <code>Calendar.SUNDAY</code> and |
| * <code>Calendar.SATURDAY</code> inclusive. |
| * <p>If <code>useDaylight</code> is false or |
| * <code>endMode == DAY_OF_MONTH</code>, this value is ignored. |
| * @serial |
| */ |
| private int endDayOfWeek; |
| |
| /** |
| * The time in milliseconds after midnight at which daylight savings |
| * time ends. This value is expressed as wall time, standard time, |
| * or UTC time, depending on the setting of <code>endTimeMode</code>. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int endTime; |
| |
| /** |
| * The format of endTime, either WALL_TIME, STANDARD_TIME, or UTC_TIME. |
| * @serial |
| * @since JDK 1.3 |
| */ |
| private int endTimeMode; |
| |
| /** |
| * The year in which daylight savings time is first observed. This is an AD |
| * value. If this value is less than 1 then daylight savings is observed |
| * for all AD years. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| */ |
| private int startYear; |
| |
| /** |
| * The offset in milliseconds between this zone and GMT. Negative offsets |
| * are to the west of Greenwich. To obtain local <em>standard</em> time, |
| * add the offset to GMT time. To obtain local wall time it may also be |
| * necessary to add <code>dstSavings</code>. |
| * @serial |
| */ |
| private int rawOffset; |
| |
| /** |
| * A boolean value which is true if and only if this zone uses daylight |
| * savings time. If this value is false, several other fields are ignored. |
| * @serial |
| */ |
| private boolean useDaylight=false; // indicate if this time zone uses DST |
| |
| private static final int millisPerHour = 60*60*1000; |
| private static final int millisPerDay = 24*millisPerHour; |
| |
| /** |
| * This field was serialized in JDK 1.1, so we have to keep it that way |
| * to maintain serialization compatibility. However, there's no need to |
| * recreate the array each time we create a new time zone. |
| * @serial An array of bytes containing the values {31, 28, 31, 30, 31, 30, |
| * 31, 31, 30, 31, 30, 31}. This is ignored as of the Java 2 platform v1.2, however, it must |
| * be streamed out for compatibility with JDK 1.1. |
| */ |
| private final byte monthLength[] = staticMonthLength; |
| private final static byte staticMonthLength[] = {31,28,31,30,31,30,31,31,30,31,30,31}; |
| private final static byte staticLeapMonthLength[] = {31,29,31,30,31,30,31,31,30,31,30,31}; |
| // Hack: Use the y/m/d constructor in the following line. |
| // This prevents the infinite recursion that results when |
| // the GC wants to call STZ.getOffset. - liu |
| private static GregorianCalendar internalCal = new GregorianCalendar(0, 0, 0); |
| |
| /** |
| * Variables specifying the mode of the start rule. Takes the following |
| * values: |
| * <dl> |
| * <dt><code>DOM_MODE</code></dt> |
| * <dd> |
| * Exact day of week; e.g., March 1. |
| * </dd> |
| * <dt><code>DOW_IN_MONTH_MODE</code></dt> |
| * <dd> |
| * Day of week in month; e.g., last Sunday in March. |
| * </dd> |
| * <dt><code>DOW_GE_DOM_MODE</code></dt> |
| * <dd> |
| * Day of week after day of month; e.g., Sunday on or after March 15. |
| * </dd> |
| * <dt><code>DOW_LE_DOM_MODE</code></dt> |
| * <dd> |
| * Day of week before day of month; e.g., Sunday on or before March 15. |
| * </dd> |
| * </dl> |
| * The setting of this field affects the interpretation of the |
| * <code>startDay</code> field. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| * @since JDK1.1.4 |
| */ |
| private int startMode; |
| |
| /** |
| * Variables specifying the mode of the end rule. Takes the following |
| * values: |
| * <dl> |
| * <dt><code>DOM_MODE</code></dt> |
| * <dd> |
| * Exact day of week; e.g., March 1. |
| * </dd> |
| * <dt><code>DOW_IN_MONTH_MODE</code></dt> |
| * <dd> |
| * Day of week in month; e.g., last Sunday in March. |
| * </dd> |
| * <dt><code>DOW_GE_DOM_MODE</code></dt> |
| * <dd> |
| * Day of week after day of month; e.g., Sunday on or after March 15. |
| * </dd> |
| * <dt><code>DOW_LE_DOM_MODE</code></dt> |
| * <dd> |
| * Day of week before day of month; e.g., Sunday on or before March 15. |
| * </dd> |
| * </dl> |
| * The setting of this field affects the interpretation of the |
| * <code>endDay</code> field. |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| * @since JDK1.1.4 |
| */ |
| private int endMode; |
| |
| /** |
| * A positive value indicating the amount of time saved during DST in |
| * milliseconds. |
| * Typically one hour (3600000); sometimes 30 minutes (1800000). |
| * <p>If <code>useDaylight</code> is false, this value is ignored. |
| * @serial |
| * @since JDK1.1.4 |
| */ |
| private int dstSavings; |
| |
| /** |
| * Constants specifying values of startMode and endMode. |
| */ |
| private static final int DOM_MODE = 1; // Exact day of month, "Mar 1" |
| private static final int DOW_IN_MONTH_MODE = 2; // Day of week in month, "lastSun" |
| private static final int DOW_GE_DOM_MODE = 3; // Day of week after day of month, "Sun>=15" |
| private static final int DOW_LE_DOM_MODE = 4; // Day of week before day of month, "Sun<=21" |
| |
| /** |
| * Constant for a rule specified as wall time. Wall time is standard time |
| * for the onset rule, and daylight time for the end rule. Most rules |
| * are specified as wall time. |
| */ |
| static final int WALL_TIME = 0; // Zero for backward compatibility |
| |
| /** |
| * Constant for a rule specified as standard time. |
| */ |
| static final int STANDARD_TIME = 1; |
| |
| /** |
| * Constant for a rule specified as UTC. EU rules are specified as UTC |
| * time. |
| */ |
| static final int UTC_TIME = 2; |
| |
| // Proclaim compatibility with 1.1 |
| static final long serialVersionUID = -403250971215465050L; |
| |
| // the internal serial version which says which version was written |
| // - 0 (default) for version up to JDK 1.1.3 |
| // - 1 for version from JDK 1.1.4, which includes 3 new fields |
| // - 2 for JDK 1.3, which includes 2 new files |
| static final int currentSerialVersion = 2; |
| |
| /** |
| * The version of the serialized data on the stream. Possible values: |
| * <dl> |
| * <dt><b>0</b> or not present on stream</dt> |
| * <dd> |
| * JDK 1.1.3 or earlier. |
| * </dd> |
| * <dt><b>1</b></dt> |
| * <dd> |
| * JDK 1.1.4 or later. Includes three new fields: <code>startMode</code>, |
| * <code>endMode</code>, and <code>dstSavings</code>. |
| * </dd> |
| * <dt><b>2</b></dt> |
| * <dd> |
| * JDK 1.3 or later. Includes two new fields: <code>startTimeMode</code> |
| * and <code>endTimeMode</code>. |
| * </dd> |
| * </dl> |
| * When streaming out this class, the most recent format |
| * and the highest allowable <code>serialVersionOnStream</code> |
| * is written. |
| * @serial |
| * @since JDK1.1.4 |
| */ |
| private int serialVersionOnStream = currentSerialVersion; |
| |
| //---------------------------------------------------------------------- |
| // Rule representation |
| // |
| // We represent the following flavors of rules: |
| // 5 the fifth of the month |
| // lastSun the last Sunday in the month |
| // lastMon the last Monday in the month |
| // Sun>=8 first Sunday on or after the eighth |
| // Sun<=25 last Sunday on or before the 25th |
| // This is further complicated by the fact that we need to remain |
| // backward compatible with the 1.1 FCS. Finally, we need to minimize |
| // API changes. In order to satisfy these requirements, we support |
| // three representation systems, and we translate between them. |
| // |
| // INTERNAL REPRESENTATION |
| // This is the format SimpleTimeZone objects take after construction or |
| // streaming in is complete. Rules are represented directly, using an |
| // unencoded format. We will discuss the start rule only below; the end |
| // rule is analogous. |
| // startMode Takes on enumerated values DAY_OF_MONTH, |
| // DOW_IN_MONTH, DOW_AFTER_DOM, or DOW_BEFORE_DOM. |
| // startDay The day of the month, or for DOW_IN_MONTH mode, a |
| // value indicating which DOW, such as +1 for first, |
| // +2 for second, -1 for last, etc. |
| // startDayOfWeek The day of the week. Ignored for DAY_OF_MONTH. |
| // |
| // ENCODED REPRESENTATION |
| // This is the format accepted by the constructor and by setStartRule() |
| // and setEndRule(). It uses various combinations of positive, negative, |
| // and zero values to encode the different rules. This representation |
| // allows us to specify all the different rule flavors without altering |
| // the API. |
| // MODE startMonth startDay startDayOfWeek |
| // DOW_IN_MONTH_MODE >=0 !=0 >0 |
| // DOM_MODE >=0 >0 ==0 |
| // DOW_GE_DOM_MODE >=0 >0 <0 |
| // DOW_LE_DOM_MODE >=0 <0 <0 |
| // (no DST) don't care ==0 don't care |
| // |
| // STREAMED REPRESENTATION |
| // We must retain binary compatibility with the 1.1 FCS. The 1.1 code only |
| // handles DOW_IN_MONTH_MODE and non-DST mode, the latter indicated by the |
| // flag useDaylight. When we stream an object out, we translate into an |
| // approximate DOW_IN_MONTH_MODE representation so the object can be parsed |
| // and used by 1.1 code. Following that, we write out the full |
| // representation separately so that contemporary code can recognize and |
| // parse it. The full representation is written in a "packed" format, |
| // consisting of a version number, a length, and an array of bytes. Future |
| // versions of this class may specify different versions. If they wish to |
| // include additional data, they should do so by storing them after the |
| // packed representation below. |
| //---------------------------------------------------------------------- |
| |
| /** |
| * Given a set of encoded rules in startDay and startDayOfMonth, decode |
| * them and set the startMode appropriately. Do the same for endDay and |
| * endDayOfMonth. Upon entry, the day of week variables may be zero or |
| * negative, in order to indicate special modes. The day of month |
| * variables may also be negative. Upon exit, the mode variables will be |
| * set, and the day of week and day of month variables will be positive. |
| * This method also recognizes a startDay or endDay of zero as indicating |
| * no DST. |
| */ |
| private void decodeRules() |
| { |
| decodeStartRule(); |
| decodeEndRule(); |
| } |
| |
| /** |
| * Decode the start rule and validate the parameters. The parameters are |
| * expected to be in encoded form, which represents the various rule modes |
| * by negating or zeroing certain values. Representation formats are: |
| * <p> |
| * <pre> |
| * DOW_IN_MONTH DOM DOW>=DOM DOW<=DOM no DST |
| * ------------ ----- -------- -------- ---------- |
| * month 0..11 same same same don't care |
| * day -5..5 1..31 1..31 -1..-31 0 |
| * dayOfWeek 1..7 0 -1..-7 -1..-7 don't care |
| * time 0..ONEDAY same same same don't care |
| * </pre> |
| * The range for month does not include UNDECIMBER since this class is |
| * really specific to GregorianCalendar, which does not use that month. |
| * The range for time includes ONEDAY (vs. ending at ONEDAY-1) because the |
| * end rule is an exclusive limit point. That is, the range of times that |
| * are in DST include those >= the start and < the end. For this reason, |
| * it should be possible to specify an end of ONEDAY in order to include the |
| * entire day. Although this is equivalent to time 0 of the following day, |
| * it's not always possible to specify that, for example, on December 31. |
| * While arguably the start range should still be 0..ONEDAY-1, we keep |
| * the start and end ranges the same for consistency. |
| */ |
| private void decodeStartRule() { |
| useDaylight = (startDay != 0) && (endDay != 0); |
| if (startDay != 0) { |
| if (startMonth < Calendar.JANUARY || startMonth > Calendar.DECEMBER) { |
| throw new IllegalArgumentException( |
| "Illegal start month " + startMonth); |
| } |
| if (startTime < 0 || startTime >= millisPerDay) { |
| throw new IllegalArgumentException( |
| "Illegal start time " + startTime); |
| } |
| if (startDayOfWeek == 0) { |
| startMode = DOM_MODE; |
| } else { |
| if (startDayOfWeek > 0) { |
| startMode = DOW_IN_MONTH_MODE; |
| } else { |
| startDayOfWeek = -startDayOfWeek; |
| if (startDay > 0) { |
| startMode = DOW_GE_DOM_MODE; |
| } else { |
| startDay = -startDay; |
| startMode = DOW_LE_DOM_MODE; |
| } |
| } |
| if (startDayOfWeek > Calendar.SATURDAY) { |
| throw new IllegalArgumentException( |
| "Illegal start day of week " + startDayOfWeek); |
| } |
| } |
| if (startMode == DOW_IN_MONTH_MODE) { |
| if (startDay < -5 || startDay > 5) { |
| throw new IllegalArgumentException( |
| "Illegal start day of week in month " + startDay); |
| } |
| } else if (startDay < 1 || startDay > staticMonthLength[startMonth]) { |
| throw new IllegalArgumentException( |
| "Illegal start day " + startDay); |
| } |
| } |
| } |
| |
| /** |
| * Decode the end rule and validate the parameters. This method is exactly |
| * analogous to decodeStartRule(). |
| * @see decodeStartRule |
| */ |
| private void decodeEndRule() { |
| useDaylight = (startDay != 0) && (endDay != 0); |
| if (endDay != 0) { |
| if (endMonth < Calendar.JANUARY || endMonth > Calendar.DECEMBER) { |
| throw new IllegalArgumentException( |
| "Illegal end month " + endMonth); |
| } |
| if (endTime < 0 || endTime >= millisPerDay) { |
| throw new IllegalArgumentException( |
| "Illegal end time " + endTime); |
| } |
| if (endDayOfWeek == 0) { |
| endMode = DOM_MODE; |
| } else { |
| if (endDayOfWeek > 0) { |
| endMode = DOW_IN_MONTH_MODE; |
| } else { |
| endDayOfWeek = -endDayOfWeek; |
| if (endDay > 0) { |
| endMode = DOW_GE_DOM_MODE; |
| } else { |
| endDay = -endDay; |
| endMode = DOW_LE_DOM_MODE; |
| } |
| } |
| if (endDayOfWeek > Calendar.SATURDAY) { |
| throw new IllegalArgumentException( |
| "Illegal end day of week " + endDayOfWeek); |
| } |
| } |
| if (endMode == DOW_IN_MONTH_MODE) { |
| if (endDay < -5 || endDay > 5) { |
| throw new IllegalArgumentException( |
| "Illegal end day of week in month " + endDay); |
| } |
| } else if (endDay < 1 || endDay > staticMonthLength[endMonth]) { |
| throw new IllegalArgumentException( |
| "Illegal end day " + endDay); |
| } |
| } |
| } |
| |
| /** |
| * Make rules compatible to 1.1 FCS code. Since 1.1 FCS code only understands |
| * day-of-week-in-month rules, we must modify other modes of rules to their |
| * approximate equivalent in 1.1 FCS terms. This method is used when streaming |
| * out objects of this class. After it is called, the rules will be modified, |
| * with a possible loss of information. startMode and endMode will NOT be |
| * altered, even though semantically they should be set to DOW_IN_MONTH_MODE, |
| * since the rule modification is only intended to be temporary. |
| */ |
| private void makeRulesCompatible() |
| { |
| switch (startMode) |
| { |
| case DOM_MODE: |
| startDay = 1 + (startDay / 7); |
| startDayOfWeek = Calendar.SUNDAY; |
| break; |
| case DOW_GE_DOM_MODE: |
| // A day-of-month of 1 is equivalent to DOW_IN_MONTH_MODE |
| // that is, Sun>=1 == firstSun. |
| if (startDay != 1) |
| startDay = 1 + (startDay / 7); |
| break; |
| case DOW_LE_DOM_MODE: |
| if (startDay >= 30) |
| startDay = -1; |
| else |
| startDay = 1 + (startDay / 7); |
| break; |
| } |
| |
| switch (endMode) |
| { |
| case DOM_MODE: |
| endDay = 1 + (endDay / 7); |
| endDayOfWeek = Calendar.SUNDAY; |
| break; |
| case DOW_GE_DOM_MODE: |
| // A day-of-month of 1 is equivalent to DOW_IN_MONTH_MODE |
| // that is, Sun>=1 == firstSun. |
| if (endDay != 1) |
| endDay = 1 + (endDay / 7); |
| break; |
| case DOW_LE_DOM_MODE: |
| if (endDay >= 30) |
| endDay = -1; |
| else |
| endDay = 1 + (endDay / 7); |
| break; |
| } |
| |
| /* Adjust the start and end times to wall time. This works perfectly |
| * well unless it pushes into the next or previous day. If that |
| * happens, we attempt to adjust the day rule somewhat crudely. The day |
| * rules have been forced into DOW_IN_MONTH mode already, so we change |
| * the day of week to move forward or back by a day. It's possible to |
| * make a more refined adjustment of the original rules first, but in |
| * most cases this extra effort will go to waste once we adjust the day |
| * rules anyway. */ |
| switch (startTimeMode) { |
| case UTC_TIME: |
| startTime += rawOffset; |
| break; |
| } |
| while (startTime < 0) { |
| startTime += millisPerDay; |
| startDayOfWeek = 1 + ((startDayOfWeek+5) % 7); // Back 1 day |
| } |
| while (startTime >= millisPerDay) { |
| startTime -= millisPerDay; |
| startDayOfWeek = 1 + (startDayOfWeek % 7); // Forward 1 day |
| } |
| |
| switch (endTimeMode) { |
| case UTC_TIME: |
| endTime += rawOffset + dstSavings; |
| break; |
| case STANDARD_TIME: |
| endTime += dstSavings; |
| } |
| while (endTime < 0) { |
| endTime += millisPerDay; |
| endDayOfWeek = 1 + ((endDayOfWeek+5) % 7); // Back 1 day |
| } |
| while (endTime >= millisPerDay) { |
| endTime -= millisPerDay; |
| endDayOfWeek = 1 + (endDayOfWeek % 7); // Forward 1 day |
| } |
| } |
| |
| /** |
| * Pack the start and end rules into an array of bytes. Only pack |
| * data which is not preserved by makeRulesCompatible. |
| */ |
| private byte[] packRules() |
| { |
| byte[] rules = new byte[6]; |
| rules[0] = (byte)startDay; |
| rules[1] = (byte)startDayOfWeek; |
| rules[2] = (byte)endDay; |
| rules[3] = (byte)endDayOfWeek; |
| |
| // As of serial version 2, include time modes |
| rules[4] = (byte)startTimeMode; |
| rules[5] = (byte)endTimeMode; |
| |
| return rules; |
| } |
| |
| /** |
| * Given an array of bytes produced by packRules, interpret them |
| * as the start and end rules. |
| */ |
| private void unpackRules(byte[] rules) |
| { |
| startDay = rules[0]; |
| startDayOfWeek = rules[1]; |
| endDay = rules[2]; |
| endDayOfWeek = rules[3]; |
| |
| // As of serial version 2, include time modes |
| if (rules.length >= 6) { |
| startTimeMode = rules[4]; |
| endTimeMode = rules[5]; |
| } |
| } |
| |
| /** |
| * Pack the start and end times into an array of bytes. This is required |
| * as of serial version 2. |
| */ |
| private int[] packTimes() { |
| int[] times = new int[2]; |
| times[0] = startTime; |
| times[1] = endTime; |
| return times; |
| } |
| |
| /** |
| * Unpack the start and end times from an array of bytes. This is required |
| * as of serial version 2. |
| */ |
| private void unpackTimes(int[] times) { |
| startTime = times[0]; |
| endTime = times[1]; |
| } |
| |
| /** |
| * Save the state of this object to a stream (i.e., serialize it). |
| * |
| * @serialData We write out two formats, a JDK 1.1 compatible format, using |
| * <code>DOW_IN_MONTH_MODE</code> rules, in the required section, followed |
| * by the full rules, in packed format, in the optional section. The |
| * optional section will be ignored by JDK 1.1 code upon stream in. |
| * <p> Contents of the optional section: The length of a byte array is |
| * emitted (int); this is 4 as of this release. The byte array of the given |
| * length is emitted. The contents of the byte array are the true values of |
| * the fields <code>startDay</code>, <code>startDayOfWeek</code>, |
| * <code>endDay</code>, and <code>endDayOfWeek</code>. The values of these |
| * fields in the required section are approximate values suited to the rule |
| * mode <code>DOW_IN_MONTH_MODE</code>, which is the only mode recognized by |
| * JDK 1.1. |
| */ |
| private void writeObject(ObjectOutputStream stream) |
| throws IOException |
| { |
| // Construct a binary rule |
| byte[] rules = packRules(); |
| int[] times = packTimes(); |
| |
| // Convert to 1.1 FCS rules. This step may cause us to lose information. |
| makeRulesCompatible(); |
| |
| // Write out the 1.1 FCS rules |
| stream.defaultWriteObject(); |
| |
| // Write out the binary rules in the optional data area of the stream. |
| stream.writeInt(rules.length); |
| stream.write(rules); |
| stream.writeObject(times); |
| |
| // Recover the original rules. This recovers the information lost |
| // by makeRulesCompatible. |
| unpackRules(rules); |
| unpackTimes(times); |
| } |
| |
| /** |
| * Reconstitute this object from a stream (i.e., deserialize it). |
| * |
| * We handle both JDK 1.1 |
| * binary formats and full formats with a packed byte array. |
| */ |
| private void readObject(ObjectInputStream stream) |
| throws IOException, ClassNotFoundException |
| { |
| stream.defaultReadObject(); |
| |
| if (serialVersionOnStream < 1) |
| { |
| // Fix a bug in the 1.1 SimpleTimeZone code -- namely, |
| // startDayOfWeek and endDayOfWeek were usually uninitialized. We can't do |
| // too much, so we assume SUNDAY, which actually works most of the time. |
| if (startDayOfWeek == 0) startDayOfWeek = Calendar.SUNDAY; |
| if (endDayOfWeek == 0) endDayOfWeek = Calendar.SUNDAY; |
| |
| // The variables dstSavings, startMode, and endMode are post-1.1, so they |
| // won't be present if we're reading from a 1.1 stream. Fix them up. |
| startMode = endMode = DOW_IN_MONTH_MODE; |
| dstSavings = millisPerHour; |
| } |
| else |
| { |
| // For 1.1.4, in addition to the 3 new instance variables, we also |
| // store the actual rules (which have not be made compatible with 1.1) |
| // in the optional area. Read them in here and parse them. |
| int length = stream.readInt(); |
| byte[] rules = new byte[length]; |
| stream.readFully(rules); |
| unpackRules(rules); |
| } |
| |
| if (serialVersionOnStream >= 2) { |
| int[] times = (int[]) stream.readObject(); |
| unpackTimes(times); |
| } |
| |
| serialVersionOnStream = currentSerialVersion; |
| } |
| } |
| |
| //eof |
