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/*
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* Copyright 2000-2003 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.util.calendar;
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import java.lang.Cloneable;
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import java.util.Locale;
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import java.util.TimeZone;
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/**
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* The <code>CalendarDate</code> class represents a specific instant
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* in time by calendar date and time fields that are multiple cycles
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* in different time unites. The semantics of each calendar field is
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* given by a concrete calendar system rather than this
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* <code>CalendarDate</code> class that holds calendar field values
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* without interpreting them. Therefore, this class can be used to
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* represent an amount of time, such as 2 years and 3 months.
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*
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* <p>A <code>CalendarDate</code> instance can be created by calling
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* the <code>newCalendarDate</code> or <code>getCalendarDate</code>
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* methods in <code>CalendarSystem</code>. A
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* <code>CalendarSystem</code> instance is obtained by calling one of
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* the factory methods in <code>CalendarSystem</code>. Manipulations
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* of calendar dates must be handled by the calendar system by which
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* <code>CalendarDate</code> instances have been created.
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*
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* <p>Some calendar fields can be modified through method calls. Any
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* modification of a calendar field brings the state of a
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* <code>CalendarDate</code> to <I>not normalized</I>. The
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* normalization must be performed to make all the calendar fields
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* consistent with a calendar system.
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*
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* <p>The <code>protected</code> methods are intended to be used for
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* implementing a concrete calendar system, not for general use as an
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* API.
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*
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* @see CalendarSystem
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* @author Masayoshi Okutsu
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* @since 1.5
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*/
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public abstract class CalendarDate implements Cloneable {
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public static final int FIELD_UNDEFINED = Integer.MIN_VALUE;
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public static final long TIME_UNDEFINED = Long.MIN_VALUE;
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private Era era;
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private int year;
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private int month;
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private int dayOfMonth;
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private int dayOfWeek = FIELD_UNDEFINED;
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private boolean leapYear;
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private int hours;
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private int minutes;
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private int seconds;
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private int millis; // fractional part of the second
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private long fraction; // time of day value in millisecond
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private boolean normalized;
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private TimeZone zoneinfo;
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private int zoneOffset;
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private int daylightSaving;
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private boolean forceStandardTime;
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private Locale locale;
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protected CalendarDate() {
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this(TimeZone.getDefault());
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}
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protected CalendarDate(TimeZone zone) {
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zoneinfo = zone;
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}
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public Era getEra() {
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return era;
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}
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/**
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* Sets the era of the date to the specified era. The default
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* implementation of this method accepts any Era value, including
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* <code>null</code>.
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*
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* @exception NullPointerException if the calendar system for this
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* <code>CalendarDate</code> requires eras and the specified era
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* is null.
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* @exception IllegalArgumentException if the specified
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* <code>era</code> is unknown to the calendar
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* system for this <code>CalendarDate</code>.
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*/
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public CalendarDate setEra(Era era) {
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if (this.era == era) {
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return this;
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}
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this.era = era;
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normalized = false;
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return this;
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}
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public int getYear() {
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return year;
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}
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public CalendarDate setYear(int year) {
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if (this.year != year) {
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this.year = year;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addYear(int n) {
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if (n != 0) {
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year += n;
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normalized = false;
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}
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return this;
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}
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/**
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* Returns whether the year represented by this
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* <code>CalendarDate</code> is a leap year. If leap years are
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* not applicable to the calendar system, this method always
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* returns <code>false</code>.
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*
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* <p>If this <code>CalendarDate</code> hasn't been normalized,
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* <code>false</code> is returned. The normalization must be
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* performed to retrieve the correct leap year information.
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*
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* @return <code>true</code> if this <code>CalendarDate</code> is
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* normalized and the year of this <code>CalendarDate</code> is a
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* leap year, or <code>false</code> otherwise.
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* @see BaseCalendar#isGregorianLeapYear
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*/
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public boolean isLeapYear() {
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return leapYear;
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}
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void setLeapYear(boolean leapYear) {
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this.leapYear = leapYear;
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}
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public int getMonth() {
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return month;
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}
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public CalendarDate setMonth(int month) {
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if (this.month != month) {
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this.month = month;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addMonth(int n) {
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if (n != 0) {
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month += n;
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normalized = false;
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}
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return this;
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}
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public int getDayOfMonth() {
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return dayOfMonth;
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}
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public CalendarDate setDayOfMonth(int date) {
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if (dayOfMonth != date) {
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dayOfMonth = date;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addDayOfMonth(int n) {
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if (n != 0) {
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dayOfMonth += n;
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normalized = false;
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}
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return this;
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}
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/**
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* Returns the day of week value. If this CalendarDate is not
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* normalized, {@link #FIELD_UNDEFINED} is returned.
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*
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* @return day of week or {@link #FIELD_UNDEFINED}
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*/
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public int getDayOfWeek() {
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if (!isNormalized()) {
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dayOfWeek = FIELD_UNDEFINED;
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}
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return dayOfWeek;
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}
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public int getHours() {
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return hours;
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}
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public CalendarDate setHours(int hours) {
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if (this.hours != hours) {
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this.hours = hours;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addHours(int n) {
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if (n != 0) {
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hours += n;
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normalized = false;
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}
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return this;
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}
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public int getMinutes() {
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return minutes;
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}
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public CalendarDate setMinutes(int minutes) {
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if (this.minutes != minutes) {
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this.minutes = minutes;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addMinutes(int n) {
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if (n != 0) {
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minutes += n;
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normalized = false;
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}
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return this;
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}
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public int getSeconds() {
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return seconds;
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}
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public CalendarDate setSeconds(int seconds) {
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if (this.seconds != seconds) {
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this.seconds = seconds;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addSeconds(int n) {
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if (n != 0) {
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seconds += n;
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normalized = false;
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}
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return this;
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}
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public int getMillis() {
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return millis;
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}
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public CalendarDate setMillis(int millis) {
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if (this.millis != millis) {
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this.millis = millis;
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normalized = false;
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}
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return this;
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}
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public CalendarDate addMillis(int n) {
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if (n != 0) {
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millis += n;
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normalized = false;
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}
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return this;
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}
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public long getTimeOfDay() {
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if (!isNormalized()) {
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return fraction = TIME_UNDEFINED;
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}
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return fraction;
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}
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public CalendarDate setDate(int year, int month, int dayOfMonth) {
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setYear(year);
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setMonth(month);
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setDayOfMonth(dayOfMonth);
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return this;
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}
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public CalendarDate addDate(int year, int month, int dayOfMonth) {
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addYear(year);
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addMonth(month);
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addDayOfMonth(dayOfMonth);
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return this;
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}
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public CalendarDate setTimeOfDay(int hours, int minutes, int seconds, int millis) {
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setHours(hours);
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setMinutes(minutes);
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setSeconds(seconds);
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setMillis(millis);
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return this;
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}
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public CalendarDate addTimeOfDay(int hours, int minutes, int seconds, int millis) {
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addHours(hours);
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addMinutes(minutes);
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addSeconds(seconds);
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addMillis(millis);
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return this;
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}
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protected void setTimeOfDay(long fraction) {
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this.fraction = fraction;
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}
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public boolean isNormalized() {
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return normalized;
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}
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public boolean isStandardTime() {
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return forceStandardTime;
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}
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public void setStandardTime(boolean standardTime) {
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forceStandardTime = standardTime;
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}
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public boolean isDaylightTime() {
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if (isStandardTime()) {
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return false;
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}
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return daylightSaving != 0;
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}
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protected void setLocale(Locale loc) {
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locale = loc;
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}
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public TimeZone getZone() {
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return zoneinfo;
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}
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public CalendarDate setZone(TimeZone zoneinfo) {
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this.zoneinfo = zoneinfo;
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return this;
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}
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/**
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* Returns whether the specified date is the same date of this
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* <code>CalendarDate</code>. The time of the day fields are
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* ignored for the comparison.
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*/
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public boolean isSameDate(CalendarDate date) {
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return getDayOfWeek() == date.getDayOfWeek()
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&& getMonth() == date.getMonth()
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&& getYear() == date.getYear()
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&& getEra() == date.getEra();
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}
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public boolean equals(Object obj) {
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if (!(obj instanceof CalendarDate)) {
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return false;
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}
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CalendarDate that = (CalendarDate) obj;
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if (isNormalized() != that.isNormalized()) {
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return false;
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}
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boolean hasZone = zoneinfo != null;
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boolean thatHasZone = that.zoneinfo != null;
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if (hasZone != thatHasZone) {
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return false;
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}
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if (hasZone && !zoneinfo.equals(that.zoneinfo)) {
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return false;
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}
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return (getEra() == that.getEra()
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&& year == that.year
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&& month == that.month
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&& dayOfMonth == that.dayOfMonth
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&& hours == that.hours
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&& minutes == that.minutes
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&& seconds == that.seconds
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&& millis == that.millis
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&& zoneOffset == that.zoneOffset);
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}
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public int hashCode() {
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// a pseudo (local standard) time stamp value in milliseconds
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// from the Epoch, assuming Gregorian calendar fields.
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long hash = ((((((long)year - 1970) * 12) + (month - 1)) * 30) + dayOfMonth) * 24;
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hash = ((((((hash + hours) * 60) + minutes) * 60) + seconds) * 1000) + millis;
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hash -= zoneOffset;
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int normalized = isNormalized() ? 1 : 0;
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int era = 0;
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Era e = getEra();
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if (e != null) {
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era = e.hashCode();
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}
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int zone = zoneinfo != null ? zoneinfo.hashCode() : 0;
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return (int) hash * (int)(hash >> 32) ^ era ^ normalized ^ zone;
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}
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/**
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* Returns a copy of this <code>CalendarDate</code>. The
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* <code>TimeZone</code> object, if any, is not cloned.
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*
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* @return a copy of this <code>CalendarDate</code>
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*/
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public Object clone() {
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try {
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return super.clone();
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} catch (CloneNotSupportedException e) {
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// this shouldn't happen
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throw new InternalError();
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}
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}
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/**
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443 |
* Converts calendar date values to a <code>String</code> in the
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* following format.
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* <pre>
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* yyyy-MM-dd'T'HH:mm:ss.SSSz
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* </pre>
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*
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* @see java.text.SimpleDateFormat
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*/
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451 |
public String toString() {
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StringBuilder sb = new StringBuilder();
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CalendarUtils.sprintf0d(sb, year, 4).append('-');
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CalendarUtils.sprintf0d(sb, month, 2).append('-');
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CalendarUtils.sprintf0d(sb, dayOfMonth, 2).append('T');
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CalendarUtils.sprintf0d(sb, hours, 2).append(':');
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|
457 |
CalendarUtils.sprintf0d(sb, minutes, 2).append(':');
|
|
458 |
CalendarUtils.sprintf0d(sb, seconds, 2).append('.');
|
|
459 |
CalendarUtils.sprintf0d(sb, millis, 3);
|
|
460 |
if (zoneOffset == 0) {
|
|
461 |
sb.append('Z');
|
|
462 |
} else if (zoneOffset != FIELD_UNDEFINED) {
|
|
463 |
int offset;
|
|
464 |
char sign;
|
|
465 |
if (zoneOffset > 0) {
|
|
466 |
offset = zoneOffset;
|
|
467 |
sign = '+';
|
|
468 |
} else {
|
|
469 |
offset = -zoneOffset;
|
|
470 |
sign = '-';
|
|
471 |
}
|
|
472 |
offset /= 60000;
|
|
473 |
sb.append(sign);
|
|
474 |
CalendarUtils.sprintf0d(sb, offset / 60, 2);
|
|
475 |
CalendarUtils.sprintf0d(sb, offset % 60, 2);
|
|
476 |
} else {
|
|
477 |
sb.append(" local time");
|
|
478 |
}
|
|
479 |
return sb.toString();
|
|
480 |
}
|
|
481 |
|
|
482 |
protected void setDayOfWeek(int dayOfWeek) {
|
|
483 |
this.dayOfWeek = dayOfWeek;
|
|
484 |
}
|
|
485 |
|
|
486 |
protected void setNormalized(boolean normalized) {
|
|
487 |
this.normalized = normalized;
|
|
488 |
}
|
|
489 |
|
|
490 |
public int getZoneOffset() {
|
|
491 |
return zoneOffset;
|
|
492 |
}
|
|
493 |
|
|
494 |
protected void setZoneOffset(int offset) {
|
|
495 |
zoneOffset = offset;
|
|
496 |
}
|
|
497 |
|
|
498 |
public int getDaylightSaving() {
|
|
499 |
return daylightSaving;
|
|
500 |
}
|
|
501 |
|
|
502 |
protected void setDaylightSaving(int daylightSaving) {
|
|
503 |
this.daylightSaving = daylightSaving;
|
|
504 |
}
|
|
505 |
}
|