1263 lines
40 KiB
Java
1263 lines
40 KiB
Java
/* java.util.Date
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Copyright (C) 1998, 1999, 2000, 2001 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.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.Serializable;
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/**
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* <p>
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* This class represents a specific time in milliseconds since the epoch.
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* The epoch is 1970, January 1 00:00:00.0000 UTC.
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* </p>
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* <p>
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* <code>Date</code> is intended to reflect universal time coordinate (UTC),
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* but this depends on the underlying host environment. Most operating systems
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* don't handle the leap second, which occurs about once every year or
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* so. The leap second is added to the last minute of the day on either
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* the 30th of June or the 31st of December, creating a minute 61 seconds
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* in length.
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* </p>
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* <p>
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* The representations of the date fields are as follows:
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* <ul>
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* <li>
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* Years are specified as the difference between the year
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* and 1900. Thus, the final year used is equal to
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* 1900 + y, where y is the input value.
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* </li>
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* <li>
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* Months are represented using zero-based indexing,
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* making 0 January and 11 December.
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* </li>
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* <li>
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* Dates are represented with the usual values of
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* 1 through to 31.
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* </li>
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* <li>
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* Hours are represented in the twenty-four hour clock,
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* with integer values from 0 to 23. 12am is 0, and
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* 12pm is 12.
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* </li>
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* <li>
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* Minutes are again as usual, with values from 0 to 59.
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* </li>
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* <li>
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* Seconds are represented with the values 0 through to 61,
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* with 60 and 61 being leap seconds (as per the ISO C standard).
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* </li>
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* </ul>
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* </p>
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* <p>
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* Prior to JDK 1.1, this class was the sole class handling date and time
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* related functionality. However, this particular solution was not
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* amenable to internationalization. The new <code>Calendar</code>
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* class should now be used to handle dates and times, with <code>Date</code>
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* being used only for values in milliseconds since the epoch. The
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* <code>Calendar</code> class, and its concrete implementations, handle
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* the interpretation of these values into minutes, hours, days, months
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* and years. The formatting and parsing of dates is left to the
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* <code>DateFormat</code> class, which is able to handle the different
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* types of date format which occur in different locales.
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* </p>
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*
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* @see Calendar
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* @see GregorianCalendar
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* @see java.text.DateFormat
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* @author Jochen Hoenicke
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* @author Per Bothner (bothner@cygnus.com)
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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*/
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public class Date
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implements Cloneable, Comparable, Serializable
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{
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/**
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* This is the serialization UID for this class
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* for compatability with Sun's JDK.
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*/
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private static final long serialVersionUID = 7523967970034938905L;
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/**
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* The time in milliseconds since the epoch.
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*/
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private transient long time;
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/**
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* An array of week names used to map names to integer values.
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*/
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private static final String[] weekNames = { "Sun", "Mon", "Tue", "Wed",
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"Thu", "Fri", "Sat" };
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/**
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* An array of month names used to map names to integer values.
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*/
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private static final String[] monthNames = { "Jan", "Feb", "Mar", "Apr",
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"May", "Jun", "Jul", "Aug",
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"Sep", "Oct", "Nov", "Dec" };
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/**
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* Creates a new Date Object representing the current time.
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*/
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public Date()
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{
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time = System.currentTimeMillis();
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}
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/**
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* Creates a new Date Object representing the given time.
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*
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* @param time the time in milliseconds since the epoch.
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*/
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public Date(long time)
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{
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this.time = time;
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}
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/**
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* Creates a new Date Object representing the given time.
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*
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* @deprecated use <code>new GregorianCalendar(year+1900, month,
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* day)</code> instead.
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* @param year the difference between the required year and 1900.
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* @param month the month as a value between 0 and 11.
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* @param day the day as a value between 0 and 31.
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*/
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public Date(int year, int month, int day)
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{
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time = new GregorianCalendar(year + 1900, month, day).getTimeInMillis();
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}
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/**
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* Creates a new Date Object representing the given time.
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*
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* @deprecated use <code>new GregorianCalendar(year+1900, month,
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* day, hour, min)</code> instead.
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* @param year the difference between the required year and 1900.
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* @param month the month as a value between 0 and 11.
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* @param day the day as a value between 0 and 31.
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* @param hour the hour as a value between 0 and 23, in 24-hour
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* clock notation.
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* @param min the minute as a value between 0 and 59.
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*/
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public Date(int year, int month, int day, int hour, int min)
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{
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time =
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new GregorianCalendar(year + 1900, month, day, hour,
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min).getTimeInMillis();
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}
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/**
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* Creates a new Date Object representing the given time.
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*
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* @deprecated use <code>new GregorianCalendar(year+1900, month,
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* day, hour, min, sec)</code> instead.
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* @param year the difference between the required year and 1900.
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* @param month the month as a value between 0 and 11.
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* @param day the day as a value between 0 and 31.
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* @param hour the hour as a value between 0 and 23, in 24-hour
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* clock notation.
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* @param min the minute as a value between 0 and 59.
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* @param sec the second as a value between 0 and 61 (with 60
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* and 61 being leap seconds).
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*/
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public Date(int year, int month, int day, int hour, int min, int sec)
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{
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time =
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new GregorianCalendar(year + 1900, month, day, hour, min,
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sec).getTimeInMillis();
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}
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/**
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* Creates a new Date from the given string representation. This
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* does the same as <code>new Date(Date.parse(s))</code>
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* @see #parse
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* @deprecated use <code>java.text.DateFormat.parse(s)</code> instead.
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*/
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public Date(String s)
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{
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time = parse(s);
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}
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/**
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* Returns a copy of this <code>Date</code> object.
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*
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* @return a copy, or null if the object couldn't be
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* cloned.
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* @see Object#clone()
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*/
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public Object clone()
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{
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try
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{
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return super.clone();
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}
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catch (CloneNotSupportedException ex)
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{
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return null;
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}
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}
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/**
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* Returns the number of milliseconds since the epoch
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* specified by the given arguments. The arguments are
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* interpreted relative to UTC rather than the local
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* time zone.
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*
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* @deprecated Use <code>Calendar</code> with a UTC
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* <code>TimeZone</code> instead.
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* @param year the difference between the required year and 1900.
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* @param month the month as a value between 0 and 11.
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* @param day the day as a value between 0 and 31.
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* @param hour the hour as a value between 0 and 23, in 24-hour
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* clock notation.
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* @param min the minute as a value between 0 and 59.
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* @param sec the second as a value between 0 and 61 (with 60
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* and 61 being leap seconds).
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* @return the time in milliseconds since the epoch.
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*/
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public static long UTC(int year, int month, int date,
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int hrs, int min, int sec)
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{
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GregorianCalendar cal =
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new GregorianCalendar(year + 1900, month, date, hrs, min, sec);
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cal.set(Calendar.ZONE_OFFSET, 0);
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cal.set(Calendar.DST_OFFSET, 0);
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return cal.getTimeInMillis();
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}
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/**
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* Gets the time represented by this object.
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*
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* @return the time in milliseconds since the epoch.
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*/
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public long getTime()
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{
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return time;
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}
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/**
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* Returns the number of minutes offset used with UTC to give the time
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* represented by this object in the current time zone. The date information
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* from this object is also used to determine whether or not daylight savings
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* time is in effect. For example, the offset for the UK would be 0 if the
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* month of the date object was January, and 1 if the month was August.
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*
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* @deprecated use
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* <code>Calendar.get(Calendar.ZONE_OFFSET)+Calendar.get(Calendar.DST_OFFSET)</code>
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* instead.
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* @return The time zone offset in minutes of the local time zone
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* relative to UTC. The time represented by this object is used to
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* determine if we should use daylight savings.
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*/
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public int getTimezoneOffset()
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{
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Calendar cal = Calendar.getInstance();
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cal.setTimeInMillis(time);
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return (cal.get(Calendar.ZONE_OFFSET)
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+ cal.get(Calendar.DST_OFFSET)) / (60 * 1000);
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}
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/**
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* Sets the time which this object should represent.
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*
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* @param time the time in milliseconds since the epoch.
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*/
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public void setTime(long time)
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{
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this.time = time;
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}
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/**
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* Tests if this date is after the specified date.
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*
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* @param when the other date
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* @return true, if the date represented by this object is
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* strictly later than the time represented by when.
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*/
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public boolean after(Date when)
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{
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return time > when.time;
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}
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/**
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* Tests if this date is before the specified date.
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*
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* @param when the other date
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* @return true, if the date represented by when is strictly later
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* than the time represented by this object.
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*/
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public boolean before(Date when)
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{
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return time < when.time;
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}
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/**
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* Compares two dates for equality.
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*
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* @param obj the object to compare.
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* @return true, if obj is a Date object and the time represented
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* by obj is exactly the same as the time represented by this
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* object.
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*/
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public boolean equals(Object obj)
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{
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return (obj instanceof Date && time == ((Date) obj).time);
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}
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/**
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* Compares two dates.
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*
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* @param when the other date.
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* @return 0, if the date represented
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* by obj is exactly the same as the time represented by this
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* object, a negative if this Date is before the other Date, and
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* a positive value otherwise.
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*/
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public int compareTo(Date when)
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{
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return (time < when.time) ? -1 : (time == when.time) ? 0 : 1;
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}
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/**
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* Compares this Date to another object. This behaves like
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* <code>compareTo(Date)</code>, but it takes a generic object
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* and throws a <code>ClassCastException</code> if obj is
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* not a <code>Date</code>.
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*
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* @param obj the other date.
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* @return 0, if the date represented
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* by obj is exactly the same as the time represented by this
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* object, a negative if this Date is before the other Date, and
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* a positive value otherwise.
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* @exception ClassCastException if obj is not of type Date.
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*/
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public int compareTo(Object obj)
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{
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return compareTo((Date) obj);
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}
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/**
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* Computes the hash code of this <code>Date</code> as the
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* XOR of the most significant and the least significant
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* 32 bits of the 64 bit milliseconds value.
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*
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* @return the hash code.
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*/
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public int hashCode()
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{
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return (int) time ^ (int) (time >>> 32);
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}
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/**
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* <p>
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* Returns a string representation of this date using
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* the following date format:
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* </p>
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* <p>
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* <code>day mon dd hh:mm:ss zz yyyy</code>
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* </p>
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* <p>where the fields used here are:
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* <ul>
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* <li>
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* <code>day</code> -- the day of the week
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* (Sunday through to Saturday).
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* </li>
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* <li>
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* <code>mon</code> -- the month (Jan to Dec).
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* </li>
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* <li>
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* <code>dd</code> -- the day of the month
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* as two decimal digits (01 to 31).
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* </li>
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* <li>
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* <code>hh</code> -- the hour of the day
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* as two decimal digits in 24-hour clock notation
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* (01 to 23).
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* </li>
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* <li>
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* <code>mm</code> -- the minute of the day
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* as two decimal digits (01 to 59).
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* </li>
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* <li>
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* <code>ss</code> -- the second of the day
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* as two decimal digits (01 to 61).
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* </li>
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* <li>
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* <code>zz</code> -- the time zone information if available.
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* The possible time zones used include the abbreviations
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* recognised by <code>parse()</code> (e.g. GMT, CET, etc.)
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* and may reflect the fact that daylight savings time is in
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* effect. The empty string is used if there is no time zone
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* information.
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* </li>
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* <li>
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* <code>yyyy</code> -- the year as four decimal digits.
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* </li>
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* </ul>
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* <p>
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* The <code>DateFormat</code> class should now be
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* preferred over using this method.
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* </p>
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*
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* @return A string of the form 'day mon dd hh:mm:ss zz yyyy'
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* @see #parse(String)
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* @see DateFormat
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*/
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public String toString()
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{
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Calendar cal = Calendar.getInstance();
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cal.setTimeInMillis(time);
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String day = "0" + cal.get(Calendar.DATE);
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String hour = "0" + cal.get(Calendar.HOUR_OF_DAY);
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String min = "0" + cal.get(Calendar.MINUTE);
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String sec = "0" + cal.get(Calendar.SECOND);
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String year = "000" + cal.get(Calendar.YEAR);
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return weekNames[cal.get(Calendar.DAY_OF_WEEK) - 1] + " "
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+ monthNames[cal.get(Calendar.MONTH)] + " "
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+ day.substring(day.length() - 2) + " "
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+ hour.substring(hour.length() - 2) + ":"
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+ min.substring(min.length() - 2) + ":"
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+ sec.substring(sec.length() - 2) + " "
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+
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cal.getTimeZone().getDisplayName(cal.getTimeZone().inDaylightTime(this),
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TimeZone.SHORT) + " " +
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year.substring(year.length() - 4);
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}
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/**
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* Returns a locale-dependent string representation of this
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* <code>Date</code> object.
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*
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* @deprecated Use DateFormat.format(Date)
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* @return A locale-dependent string representation.
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* @see #parse(String)
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* @see DateFormat
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*/
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public String toLocaleString()
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{
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return java.text.DateFormat.getInstance().format(this);
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}
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|
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/**
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* <p>
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* Returns a string representation of this <code>Date</code>
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* object using GMT rather than the local timezone.
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* The following date format is used:
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* </p>
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* <p>
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* <code>d mon yyyy hh:mm:ss GMT</code>
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* </p>
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|
* <p>where the fields used here are:
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* <ul>
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* <li>
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* <code>d</code> -- the day of the month
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* as one or two decimal digits (1 to 31).
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* </li>
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* <li>
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* <code>mon</code> -- the month (Jan to Dec).
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* </li>
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* <li>
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* <code>yyyy</code> -- the year as four decimal digits.
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* </li>
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* <li>
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* <code>hh</code> -- the hour of the day
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* as two decimal digits in 24-hour clock notation
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* (01 to 23).
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* </li>
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* <li>
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* <code>mm</code> -- the minute of the day
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* as two decimal digits (01 to 59).
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* </li>
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* <li>
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* <code>ss</code> -- the second of the day
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* as two decimal digits (01 to 61).
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* </li>
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* <li>
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* <code>GMT</code> -- the literal string "GMT"
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* indicating Greenwich Mean Time as opposed to
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* the local timezone.
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* </li>
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* </ul>
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*
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* @deprecated Use DateFormat.format(Date) with a GMT TimeZone.
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* @return A string of the form 'd mon yyyy hh:mm:ss GMT' using
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* GMT as opposed to the local timezone.
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* @see #parse(String)
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* @see DateFormat
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*/
|
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public String toGMTString()
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{
|
|
java.text.DateFormat format = java.text.DateFormat.getInstance();
|
|
format.setTimeZone(TimeZone.getTimeZone("GMT"));
|
|
return format.format(this);
|
|
}
|
|
|
|
/**
|
|
* Parses the time zone string.
|
|
*
|
|
* @param tok The token containing the time zone.
|
|
* @param sign The sign (+ or -) used by the time zone.
|
|
* @return An integer representing the number of minutes offset
|
|
* from GMT for the time zone.
|
|
*/
|
|
private static int parseTz(String tok, char sign)
|
|
throws IllegalArgumentException
|
|
{
|
|
int num;
|
|
|
|
try
|
|
{
|
|
// parseInt doesn't handle '+' so strip off sign.
|
|
num = Integer.parseInt(tok.substring(1));
|
|
}
|
|
catch (NumberFormatException ex)
|
|
{
|
|
throw new IllegalArgumentException(tok);
|
|
}
|
|
|
|
// Convert hours to minutes.
|
|
if (num < 24)
|
|
num *= 60;
|
|
else
|
|
num = (num / 100) * 60 + num % 100;
|
|
|
|
return sign == '-' ? -num : num;
|
|
}
|
|
|
|
/**
|
|
* Parses the month string.
|
|
*
|
|
* @param tok the token containing the month.
|
|
* @return An integer between 0 and 11, representing
|
|
* a month from January (0) to December (11),
|
|
* or -1 if parsing failed.
|
|
*/
|
|
private static int parseMonth(String tok)
|
|
{
|
|
// Initialize strings for month names.
|
|
// We could possibly use the fields of DateFormatSymbols but that is
|
|
// localized and thus might not match the English words specified.
|
|
String months[] = { "JANUARY", "FEBRUARY", "MARCH", "APRIL", "MAY",
|
|
"JUNE", "JULY", "AUGUST", "SEPTEMBER", "OCTOBER",
|
|
"NOVEMBER", "DECEMBER" };
|
|
|
|
int i;
|
|
for (i = 0; i < 12; i++)
|
|
if (months[i].startsWith(tok))
|
|
return i;
|
|
|
|
// Return -1 if not found.
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Parses the day of the week string.
|
|
*
|
|
* @param tok the token containing the day of the week.
|
|
* @return true if the token was parsed successfully.
|
|
*/
|
|
private static boolean parseDayOfWeek(String tok)
|
|
{
|
|
// Initialize strings for days of the week names.
|
|
// We could possibly use the fields of DateFormatSymbols but that is
|
|
// localized and thus might not match the English words specified.
|
|
String daysOfWeek[] = { "SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY",
|
|
"THURSDAY", "FRIDAY", "SATURDAY" };
|
|
|
|
int i;
|
|
for (i = 0; i < 7; i++)
|
|
if (daysOfWeek[i].startsWith(tok))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Parses a String and returns the time, in milliseconds since the
|
|
* epoch, it represents. Most syntaxes are handled, including
|
|
* the IETF date standard "day, dd mon yyyy hh:mm:ss zz" (see
|
|
* <code>toString()</code> for definitions of these fields).
|
|
* Standard U.S. time zone abbreviations are recognised, in
|
|
* addition to time zone offsets in positive or negative minutes.
|
|
* If a time zone is specified, the specified time is assumed to
|
|
* be in UTC and the appropriate conversion is applied, following
|
|
* parsing, to convert this to the local time zone. If no zone
|
|
* is specified, the time is assumed to already be in the local
|
|
* time zone.
|
|
* </p>
|
|
* <p>
|
|
* The method parses the string progressively from left to right.
|
|
* At the end of the parsing process, either a time is returned
|
|
* or an <code>IllegalArgumentException</code> is thrown to signify
|
|
* failure. The ASCII characters A-Z, a-z, 0-9, and ',', '+', '-',
|
|
* ':' and '/' are the only characters permitted within the string,
|
|
* besides whitespace and characters enclosed within parantheses
|
|
* '(' and ')'.
|
|
* </p>
|
|
* <p>
|
|
* A sequence of consecutive digits are recognised as a number,
|
|
* and interpreted as follows:
|
|
* <ul>
|
|
* <li>
|
|
* A number preceded by a sign (+ or -) is taken to be a time zone
|
|
* offset. The time zone offset can be specified in either hours
|
|
* or minutes. The former is assumed if the number is less than 24.
|
|
* Otherwise, the offset is assumed to be in minutes. A - indicates
|
|
* a time zone west of GMT, while a + represents a time zone to the
|
|
* east of GMT. The time zones are always assumed to be relative
|
|
* to GMT, and a (redundant) specification of this can be included
|
|
* with the time zone. For example, '-9', 'utc-9' and 'GMT-9' all
|
|
* represent a time zone nine hours west of GMT. Similarly,
|
|
* '+4', 'ut+4' and 'UTC+4' all give 4 hours east of GMT.
|
|
* </li>
|
|
* <li>
|
|
* A number equal to or greater than 70 is regarded as a year specification.
|
|
* Values lower than 70 are only assumed to indicate a year if both the
|
|
* day of the month and the month itself have already been recognised.
|
|
* Year values less than 100 are interpreted as being relative to the current
|
|
* century when the <code>Date</code> class is initialised.. Given a century,
|
|
* x, the year is assumed to be within the range x - 80 to x + 19. The value
|
|
* itself is then used as a match against the two last digits of one of these
|
|
* years. For example, take x to be 2004. A two-digit year is assumed to fall
|
|
* within the range x - 80 (1924) and x + 19 (2023). Thus, any intepreted value
|
|
* between 0 and 23 is assumed to be 2000 to 2023 and values between 24 and 99
|
|
* are taken as being 1924 to 1999. This only applies for the case of 2004.
|
|
* With a different year, the values will be interpreted differently. 2005
|
|
* will used 0 to 24 as 2000 to 2024 and 25 to 99 as 1925 to 1999, for example.
|
|
* This behaviour differs from that of <code>SimpleDateFormat</code> and is
|
|
* time-dependent (a two-digit year will be interpreted differently depending
|
|
* on the time the code is run).
|
|
* </li>
|
|
* <li>
|
|
* Numbers followed by a colon are interpreted by first an hour, and then
|
|
* as a minute, once an hour has been found.
|
|
* </li>
|
|
* <li>
|
|
* <li>
|
|
* Numbers followed by a slash are regarded first as a month, and then as
|
|
* a day of the month once the month has been found. This follows the
|
|
* U.S. date format of mm/dd, rather than the European dd/mm. Months
|
|
* are converted to the recognised value - 1 before storage, in order
|
|
* to put the number within the range 0 to 11.
|
|
* </li>
|
|
* <li>
|
|
* Numbers followed by commas, whitespace, hyphens or the end of the string
|
|
* are interpreted in the following order: hour, minute, second, day of month.
|
|
* The first type not already recognised in the current string being parsed is
|
|
* assumed.
|
|
* </li>
|
|
* </ul>
|
|
* </p>
|
|
* <p>
|
|
* A sequence of consecutive alphabetic characters is recognised as a word,
|
|
* and interpreted as follows, in a case-insentive fashion:
|
|
* <li>
|
|
* The characters 'AM' or 'PM' restrict the hour value to a value between 0
|
|
* and 12. In the latter case, 12 is added to the hour value before storage.
|
|
* </li>
|
|
* <li>
|
|
* Any words which match any prefix of one of the days of the week ('Monday',
|
|
* 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' and 'Sunday'),
|
|
* are simply ignored.
|
|
* </li>
|
|
* <li>
|
|
* Any words which match any prefix of one of the months of the year ('January',
|
|
* 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September',
|
|
* 'October', 'November', 'December') are recognised and interpreted as the
|
|
* appropriate value between 0 and 11. The first match made against a
|
|
* month is the one used, in the order specified here. For example, 'Ma' is
|
|
* intepreted as 'March' (2) and not as 'May' (4). Similarly, 'Ju' is 'June',
|
|
* and not 'July'.
|
|
* </li>
|
|
* <li>
|
|
* The words 'GMT', 'UT' and 'UTC' are interpreted as specifying UTC as the
|
|
* time zone in use for this date.
|
|
* </li>
|
|
* <li>
|
|
* The word pairs 'EST'/'EDT', 'CST'/'CDT', 'MST'/'MDT' and 'PST'/'PDT' are
|
|
* interpreted as the appropriate U.S. time zone abbreviation. Each pair
|
|
* is the standard and daylight savings time zone specification, respectively,
|
|
* for each zone within the U.S, these being Eastern Standard/Daylight Time
|
|
* (-5), Central Standard/Daylight Time (-6), Mountain Standard/Daylight Time
|
|
* (-7) and Pacific Standard/Daylight Time (-8).
|
|
* </li>
|
|
* </ul>
|
|
*
|
|
* @param s The String to parse.
|
|
* @return The time in milliseconds since the epoch.
|
|
* @throws IllegalArgumentException if the string fails to parse.
|
|
* @deprecated Use DateFormat.parse(String)
|
|
* @see #toString()
|
|
* @see SimpleDateFormat
|
|
*/
|
|
public static long parse(String string)
|
|
{
|
|
// Initialize date/time fields before parsing begins.
|
|
int year = -1;
|
|
int month = -1;
|
|
int day = -1;
|
|
int hour = -1;
|
|
int minute = -1;
|
|
int second = -1;
|
|
int timezone = 0;
|
|
boolean localTimezone = true;
|
|
|
|
// Trim out any nested stuff in parentheses now to make parsing easier.
|
|
StringBuffer buf = new StringBuffer();
|
|
int parenNesting = 0;
|
|
int len = string.length();
|
|
for (int i = 0; i < len; i++)
|
|
{
|
|
char ch = string.charAt(i);
|
|
if (ch >= 'a' && ch <= 'z')
|
|
ch -= 'a' - 'A';
|
|
if (ch == '(')
|
|
parenNesting++;
|
|
else if (parenNesting == 0)
|
|
buf.append(ch);
|
|
else if (ch == ')')
|
|
parenNesting--;
|
|
}
|
|
int tmpMonth;
|
|
|
|
// Make all chars upper case to simplify comparisons later.
|
|
// Also ignore commas; treat them as delimiters.
|
|
StringTokenizer strtok = new StringTokenizer(buf.toString(), " \t\n\r,");
|
|
|
|
while (strtok.hasMoreTokens())
|
|
{
|
|
String tok = strtok.nextToken();
|
|
char firstch = tok.charAt(0);
|
|
if ((firstch == '+' || firstch == '-') && year >= 0)
|
|
{
|
|
timezone = parseTz(tok, firstch);
|
|
localTimezone = false;
|
|
}
|
|
else if (firstch >= '0' && firstch <= '9')
|
|
{
|
|
while (tok != null && tok.length() > 0)
|
|
{
|
|
int punctOffset = tok.length();
|
|
int num = 0;
|
|
int punct;
|
|
for (int i = 0; ; i++)
|
|
{
|
|
if (i >= punctOffset)
|
|
{
|
|
punct = -1;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
punct = tok.charAt(i);
|
|
if (punct >= '0' && punct <= '9')
|
|
{
|
|
if (num > 999999999) // in case of overflow
|
|
throw new IllegalArgumentException(tok);
|
|
num = 10 * num + (punct - '0');
|
|
}
|
|
else
|
|
{
|
|
punctOffset = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
if (punct == ':')
|
|
{
|
|
if (hour < 0)
|
|
hour = num;
|
|
else
|
|
minute = num;
|
|
}
|
|
else if ((num >= 70
|
|
&& (punct == ' ' || punct == ','
|
|
|| punct == '/' || punct < 0))
|
|
|| (num < 70 && day >= 0 && month >= 0 && year < 0))
|
|
{
|
|
if (num >= 100)
|
|
year = num;
|
|
else
|
|
{
|
|
int curYear = 1900 + new Date().getYear();
|
|
int firstYear = curYear - 80;
|
|
year = firstYear / 100 * 100 + num;
|
|
if (year < firstYear)
|
|
year += 100;
|
|
}
|
|
}
|
|
else if (punct == '/')
|
|
{
|
|
if (month < 0)
|
|
month = num - 1;
|
|
else
|
|
day = num;
|
|
}
|
|
else if (hour >= 0 && minute < 0)
|
|
minute = num;
|
|
else if (minute >= 0 && second < 0)
|
|
second = num;
|
|
else if (day < 0)
|
|
day = num;
|
|
else
|
|
throw new IllegalArgumentException(tok);
|
|
|
|
// Advance string if there's more to process in this token.
|
|
if (punct < 0 || punctOffset + 1 >= tok.length())
|
|
tok = null;
|
|
else
|
|
tok = tok.substring(punctOffset + 1);
|
|
}
|
|
}
|
|
else if (firstch >= 'A' && firstch <= 'Z')
|
|
{
|
|
if (tok.equals("AM"))
|
|
{
|
|
if (hour < 1 || hour > 12)
|
|
throw new IllegalArgumentException(tok);
|
|
if (hour == 12)
|
|
hour = 0;
|
|
}
|
|
else if (tok.equals("PM"))
|
|
{
|
|
if (hour < 1 || hour > 12)
|
|
throw new IllegalArgumentException(tok);
|
|
if (hour < 12)
|
|
hour += 12;
|
|
}
|
|
else if (parseDayOfWeek(tok))
|
|
; // Ignore it; throw the token away.
|
|
else if (tok.equals("UT") || tok.equals("UTC") || tok.equals("GMT"))
|
|
localTimezone = false;
|
|
else if (tok.startsWith("UT") || tok.startsWith("GMT"))
|
|
{
|
|
int signOffset = 3;
|
|
if (tok.charAt(1) == 'T' && tok.charAt(2) != 'C')
|
|
signOffset = 2;
|
|
|
|
char sign = tok.charAt(signOffset);
|
|
if (sign != '+' && sign != '-')
|
|
throw new IllegalArgumentException(tok);
|
|
|
|
timezone = parseTz(tok.substring(signOffset), sign);
|
|
localTimezone = false;
|
|
}
|
|
else if ((tmpMonth = parseMonth(tok)) >= 0)
|
|
month = tmpMonth;
|
|
else if (tok.length() == 3 && tok.charAt(2) == 'T')
|
|
{
|
|
// Convert timezone offset from hours to minutes.
|
|
char ch = tok.charAt(0);
|
|
if (ch == 'E')
|
|
timezone = -5 * 60;
|
|
else if (ch == 'C')
|
|
timezone = -6 * 60;
|
|
else if (ch == 'M')
|
|
timezone = -7 * 60;
|
|
else if (ch == 'P')
|
|
timezone = -8 * 60;
|
|
else
|
|
throw new IllegalArgumentException(tok);
|
|
|
|
// Shift 60 minutes for Daylight Savings Time.
|
|
if (tok.charAt(1) == 'D')
|
|
timezone += 60;
|
|
else if (tok.charAt(1) != 'S')
|
|
throw new IllegalArgumentException(tok);
|
|
|
|
localTimezone = false;
|
|
}
|
|
else
|
|
throw new IllegalArgumentException(tok);
|
|
}
|
|
else
|
|
throw new IllegalArgumentException(tok);
|
|
}
|
|
|
|
// Unspecified hours, minutes, or seconds should default to 0.
|
|
if (hour < 0)
|
|
hour = 0;
|
|
if (minute < 0)
|
|
minute = 0;
|
|
if (second < 0)
|
|
second = 0;
|
|
|
|
// Throw exception if any other fields have not been recognized and set.
|
|
if (year < 0 || month < 0 || day < 0)
|
|
throw new IllegalArgumentException("Missing field");
|
|
|
|
// Return the time in either local time or relative to GMT as parsed.
|
|
// If no time-zone was specified, get the local one (in minutes) and
|
|
// convert to milliseconds before adding to the UTC.
|
|
GregorianCalendar cal
|
|
= new GregorianCalendar(year, month, day, hour, minute, second);
|
|
if (!localTimezone)
|
|
{
|
|
cal.set(Calendar.ZONE_OFFSET, timezone * 60 * 1000);
|
|
cal.set(Calendar.DST_OFFSET, 0);
|
|
}
|
|
return cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the difference between the year represented by this
|
|
* <code>Date</code> object and 1900.
|
|
*
|
|
* @return the year minus 1900 represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.YEAR)
|
|
* instead. Note the 1900 difference in the year.
|
|
* @see Calendar
|
|
* @see #setYear(int)
|
|
*/
|
|
public int getYear()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.YEAR) - 1900;
|
|
}
|
|
|
|
/**
|
|
* Sets the year to the specified year, plus 1900. The other
|
|
* fields are only altered as required to match the same date
|
|
* and time in the new year. Usually, this will mean that
|
|
* the fields are not changed at all, but in the case of
|
|
* a leap day or leap second, the fields will change in
|
|
* relation to the existence of such an event in the new year.
|
|
* For example, if the date specifies February the 29th, 2000,
|
|
* then this will become March the 1st if the year is changed
|
|
* to 2001, as 2001 is not a leap year. Similarly, a seconds
|
|
* value of 60 or 61 may result in the seconds becoming 0 and
|
|
* the minute increasing by 1, if the new time does not include
|
|
* a leap second.
|
|
*
|
|
* @param year the year minus 1900.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.YEAR, year) instead. Note about the 1900
|
|
* difference in year.
|
|
* @see #getYear()
|
|
* @see Calendar
|
|
*/
|
|
public void setYear(int year)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.YEAR, 1900 + year);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the month represented by this <code>Date</code> object,
|
|
* as a value between 0 (January) and 11 (December).
|
|
*
|
|
* @return the month represented by this date object (zero based).
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.MONTH)
|
|
* instead.
|
|
* @see #setMonth(int)
|
|
* @see Calendar
|
|
*/
|
|
public int getMonth()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.MONTH);
|
|
}
|
|
|
|
/**
|
|
* Sets the month to the given value. The other
|
|
* fields are only altered as necessary to match
|
|
* the same date and time in the new month. In most
|
|
* cases, the other fields won't change at all. However,
|
|
* in the case of a shorter month or a leap second, values
|
|
* may be adjusted. For example, if the day of the month
|
|
* is currently 31, and the month value is changed from
|
|
* January (0) to September (8), the date will become
|
|
* October the 1st, as September only has 30 days. Similarly,
|
|
* a seconds value of 60 or 61 (a leap second) may result
|
|
* in the seconds value being reset to 0 and the minutes
|
|
* value being incremented by 1, if the new time does
|
|
* not include a leap second.
|
|
*
|
|
* @param month the month, with a zero-based index
|
|
* from January.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.MONTH, month) instead.
|
|
* @see #getMonth()
|
|
* @see Calendar
|
|
*/
|
|
public void setMonth(int month)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.MONTH, month);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the day of the month of this <code>Date</code>
|
|
* object, as a value between 0 and 31.
|
|
*
|
|
* @return the day of month represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.DATE)
|
|
* instead.
|
|
* @see Calendar
|
|
* @see #setDate(int)
|
|
*/
|
|
public int getDate()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.DATE);
|
|
}
|
|
|
|
/**
|
|
* Sets the date to the given value. The other
|
|
* fields are only altered as necessary to match
|
|
* the same date and time on the new day of the month. In most
|
|
* cases, the other fields won't change at all. However,
|
|
* in the case of a leap second or the day being out of
|
|
* the range of the current month, values
|
|
* may be adjusted. For example, if the day of the month
|
|
* is currently 30 and the month is June, a new day of the
|
|
* month value of 31 will cause the month to change to July,
|
|
* as June only has 30 days . Similarly,
|
|
* a seconds value of 60 or 61 (a leap second) may result
|
|
* in the seconds value being reset to 0 and the minutes
|
|
* value being incremented by 1, if the new time does
|
|
* not include a leap second.
|
|
*
|
|
* @param date the date.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.DATE, date) instead.
|
|
* @see Calendar
|
|
* @see #getDate()
|
|
*/
|
|
public void setDate(int date)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.DATE, date);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the day represented by this <code>Date</code>
|
|
* object as an integer between 0 (Sunday) and 6 (Saturday).
|
|
*
|
|
* @return the day represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.DAY_OF_WEEK)
|
|
* instead.
|
|
* @see Calendar
|
|
*/
|
|
public int getDay()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
// For Calendar, Sunday is 1. For Date, Sunday is 0.
|
|
return cal.get(Calendar.DAY_OF_WEEK) - 1;
|
|
}
|
|
|
|
/**
|
|
* Returns the hours represented by this <code>Date</code>
|
|
* object as an integer between 0 and 23.
|
|
*
|
|
* @return the hours represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.HOUR_OF_DAY)
|
|
* instead.
|
|
* @see Calendar
|
|
* @see #setHours(int)
|
|
*/
|
|
public int getHours()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.HOUR_OF_DAY);
|
|
}
|
|
|
|
/**
|
|
* Sets the hours to the given value. The other
|
|
* fields are only altered as necessary to match
|
|
* the same date and time in the new hour. In most
|
|
* cases, the other fields won't change at all. However,
|
|
* in the case of a leap second, values
|
|
* may be adjusted. For example,
|
|
* a seconds value of 60 or 61 (a leap second) may result
|
|
* in the seconds value being reset to 0 and the minutes
|
|
* value being incremented by 1 if the new hour does
|
|
* not contain a leap second.
|
|
*
|
|
* @param hours the hours.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.HOUR_OF_DAY, hours) instead.
|
|
* @see Calendar
|
|
* @see #getHours()
|
|
*/
|
|
public void setHours(int hours)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.HOUR_OF_DAY, hours);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the number of minutes represented by the <code>Date</code>
|
|
* object, as an integer between 0 and 59.
|
|
*
|
|
* @return the minutes represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.MINUTE)
|
|
* instead.
|
|
* @see Calendar
|
|
* @see #setMinutes(int)
|
|
*/
|
|
public int getMinutes()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.MINUTE);
|
|
}
|
|
|
|
/**
|
|
* Sets the minutes to the given value. The other
|
|
* fields are only altered as necessary to match
|
|
* the same date and time in the new minute. In most
|
|
* cases, the other fields won't change at all. However,
|
|
* in the case of a leap second, values
|
|
* may be adjusted. For example,
|
|
* a seconds value of 60 or 61 (a leap second) may result
|
|
* in the seconds value being reset to 0 and the minutes
|
|
* value being incremented by 1 if the new minute does
|
|
* not contain a leap second.
|
|
*
|
|
* @param minutes the minutes.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.MINUTE, minutes) instead.
|
|
* @see Calendar
|
|
* @see #getMinutes()
|
|
*/
|
|
public void setMinutes(int minutes)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.MINUTE, minutes);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Returns the number of seconds represented by the <code>Date</code>
|
|
* object, as an integer between 0 and 61 (60 and 61 being leap seconds).
|
|
*
|
|
* @return the seconds represented by this date object.
|
|
* @deprecated Use Calendar instead of Date, and use get(Calendar.SECOND)
|
|
* instead.
|
|
* @see Calendar
|
|
* @see #setSeconds(int)
|
|
*/
|
|
public int getSeconds()
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
return cal.get(Calendar.SECOND);
|
|
}
|
|
|
|
/**
|
|
* Sets the seconds to the given value. The other
|
|
* fields are only altered as necessary to match
|
|
* the same date and time in the new minute. In most
|
|
* cases, the other fields won't change at all. However,
|
|
* in the case of a leap second, values
|
|
* may be adjusted. For example, setting the
|
|
* seconds value to 60 or 61 (a leap second) may result
|
|
* in the seconds value being reset to 0 and the minutes
|
|
* value being incremented by 1, if the current time does
|
|
* not contain a leap second.
|
|
*
|
|
* @param seconds the seconds.
|
|
* @deprecated Use Calendar instead of Date, and use
|
|
* set(Calendar.SECOND, seconds) instead.
|
|
* @see Calendar
|
|
* @see #getSeconds()
|
|
*/
|
|
public void setSeconds(int seconds)
|
|
{
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(time);
|
|
cal.set(Calendar.SECOND, seconds);
|
|
time = cal.getTimeInMillis();
|
|
}
|
|
|
|
/**
|
|
* Deserializes a <code>Date</code> object from an
|
|
* input stream, setting the time (in milliseconds
|
|
* since the epoch) to the long value read from the
|
|
* stream.
|
|
*
|
|
* @param input the input stream.
|
|
* @throws IOException if an I/O error occurs in the stream.
|
|
* @throws ClassNotFoundException if the class of the
|
|
* serialized object could not be found.
|
|
*/
|
|
private void readObject(ObjectInputStream input)
|
|
throws IOException, ClassNotFoundException
|
|
{
|
|
input.defaultReadObject();
|
|
time = input.readLong();
|
|
}
|
|
|
|
/**
|
|
* Serializes a <code>Date</code> object to an output stream,
|
|
* storing the time (in milliseconds since the epoch) as a long
|
|
* value in the stream.
|
|
*
|
|
* @serialdata A long value representing the offset from the epoch
|
|
* in milliseconds. This is the same value that is returned by the
|
|
* method getTime().
|
|
* @param output the output stream.
|
|
* @throws IOException if an I/O error occurs in the stream.
|
|
*/
|
|
private void writeObject(ObjectOutputStream output)
|
|
throws IOException
|
|
{
|
|
output.defaultWriteObject();
|
|
output.writeLong(time);
|
|
}
|
|
|
|
}
|