418 lines
16 KiB
Java
418 lines
16 KiB
Java
|
/*
|
||
|
|
* Copyright (C) 2014 The Android Open Source Project
|
||
|
|
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
||
|
|
*
|
||
|
|
* This code is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 only, as
|
||
|
|
* published by the Free Software Foundation. Oracle designates this
|
||
|
|
* particular file as subject to the "Classpath" exception as provided
|
||
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
||
|
|
*
|
||
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
||
|
|
* accompanied this code).
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License version
|
||
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
||
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*
|
||
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||
|
|
* or visit www.oracle.com if you need additional information or have any
|
||
|
|
* questions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package sun.util.calendar;
|
||
|
|
|
||
|
|
import java.io.IOException;
|
||
|
|
import java.io.InputStream;
|
||
|
|
import java.util.HashMap;
|
||
|
|
import java.util.Map;
|
||
|
|
import java.util.Properties;
|
||
|
|
import java.util.TimeZone;
|
||
|
|
import java.util.concurrent.ConcurrentHashMap;
|
||
|
|
import java.util.concurrent.ConcurrentMap;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* <code>CalendarSystem</code> is an abstract class that defines the
|
||
|
|
* programming interface to deal with calendar date and time.
|
||
|
|
*
|
||
|
|
* <p><code>CalendarSystem</code> instances are singletons. For
|
||
|
|
* example, there exists only one Gregorian calendar instance in the
|
||
|
|
* Java runtime environment. A singleton instance can be obtained
|
||
|
|
* calling one of the static factory methods.
|
||
|
|
*
|
||
|
|
* <h4>CalendarDate</h4>
|
||
|
|
*
|
||
|
|
* <p>For the methods in a <code>CalendarSystem</code> that manipulate
|
||
|
|
* a <code>CalendarDate</code>, <code>CalendarDate</code>s that have
|
||
|
|
* been created by the <code>CalendarSystem</code> must be
|
||
|
|
* specified. Otherwise, the methods throw an exception. This is
|
||
|
|
* because, for example, a Chinese calendar date can't be understood
|
||
|
|
* by the Hebrew calendar system.
|
||
|
|
*
|
||
|
|
* <h4>Calendar names</h4>
|
||
|
|
*
|
||
|
|
* Each calendar system has a unique name to be identified. The Java
|
||
|
|
* runtime in this release supports the following calendar systems.
|
||
|
|
*
|
||
|
|
* <pre>
|
||
|
|
* Name Calendar System
|
||
|
|
* ---------------------------------------
|
||
|
|
* gregorian Gregorian Calendar
|
||
|
|
* julian Julian Calendar
|
||
|
|
* japanese Japanese Imperial Calendar
|
||
|
|
* </pre>
|
||
|
|
*
|
||
|
|
* @see CalendarDate
|
||
|
|
* @author Masayoshi Okutsu
|
||
|
|
* @since 1.5
|
||
|
|
*/
|
||
|
|
|
||
|
|
public abstract class CalendarSystem {
|
||
|
|
|
||
|
|
/////////////////////// Calendar Factory Methods /////////////////////////
|
||
|
|
|
||
|
|
// BEGIN Android-changed: avoid reflection and lazy initialization for loading calendar classes.
|
||
|
|
/*
|
||
|
|
private static volatile boolean initialized;
|
||
|
|
|
||
|
|
// Map of calendar names and calendar class names
|
||
|
|
private static ConcurrentMap<String, String> names;
|
||
|
|
*/
|
||
|
|
// Map of calendar names and calendar classes;
|
||
|
|
private static final Map<String, Class<?>> names;
|
||
|
|
|
||
|
|
// Map of calendar names and CalendarSystem instances
|
||
|
|
private static final ConcurrentMap<String, CalendarSystem> calendars =
|
||
|
|
new ConcurrentHashMap<>();
|
||
|
|
// END Android-changed: avoid reflection and lazy initialization for loading calendar classes.
|
||
|
|
|
||
|
|
// BEGIN Android-changed: avoid reflection and lazy initialization for loading calendar classes.
|
||
|
|
/*
|
||
|
|
private static final String PACKAGE_NAME = "sun.util.calendar.";
|
||
|
|
|
||
|
|
private static final String[] namePairs = {
|
||
|
|
"gregorian", "Gregorian",
|
||
|
|
"japanese", "LocalGregorianCalendar",
|
||
|
|
"julian", "JulianCalendar",
|
||
|
|
*/
|
||
|
|
static {
|
||
|
|
names = new HashMap<>();
|
||
|
|
names.put("gregorian", Gregorian.class);
|
||
|
|
names.put("japanese", LocalGregorianCalendar.class);
|
||
|
|
names.put("julian", JulianCalendar.class);
|
||
|
|
// END Android-changed: avoid reflection and lazy initialization for loading calendar classes.
|
||
|
|
/*
|
||
|
|
"hebrew", "HebrewCalendar",
|
||
|
|
"iso8601", "ISOCalendar",
|
||
|
|
"taiwanese", "LocalGregorianCalendar",
|
||
|
|
"thaibuddhist", "LocalGregorianCalendar",
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
// BEGIN Android-removed: avoid reflection for loading calendar classes.
|
||
|
|
/*
|
||
|
|
private static void initNames() {
|
||
|
|
ConcurrentMap<String,String> nameMap = new ConcurrentHashMap<>();
|
||
|
|
|
||
|
|
// Associate a calendar name with its class name and the
|
||
|
|
// calendar class name with its date class name.
|
||
|
|
StringBuilder clName = new StringBuilder();
|
||
|
|
for (int i = 0; i < namePairs.length; i += 2) {
|
||
|
|
clName.setLength(0);
|
||
|
|
String cl = clName.append(PACKAGE_NAME).append(namePairs[i+1]).toString();
|
||
|
|
nameMap.put(namePairs[i], cl);
|
||
|
|
}
|
||
|
|
synchronized (CalendarSystem.class) {
|
||
|
|
if (!initialized) {
|
||
|
|
names = nameMap;
|
||
|
|
calendars = new ConcurrentHashMap<>();
|
||
|
|
initialized = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
// END Android-removed: avoid reflection for loading calendar classes.
|
||
|
|
|
||
|
|
private static final class GregorianHolder {
|
||
|
|
private static final Gregorian GREGORIAN_INSTANCE = new Gregorian();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the singleton instance of the <code>Gregorian</code>
|
||
|
|
* calendar system.
|
||
|
|
*
|
||
|
|
* @return the <code>Gregorian</code> instance
|
||
|
|
*/
|
||
|
|
public static Gregorian getGregorianCalendar() {
|
||
|
|
return GregorianHolder.GREGORIAN_INSTANCE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a <code>CalendarSystem</code> specified by the calendar
|
||
|
|
* name. The calendar name has to be one of the supported calendar
|
||
|
|
* names.
|
||
|
|
*
|
||
|
|
* @param calendarName the calendar name
|
||
|
|
* @return the <code>CalendarSystem</code> specified by
|
||
|
|
* <code>calendarName</code>, or null if there is no
|
||
|
|
* <code>CalendarSystem</code> associated with the given calendar name.
|
||
|
|
*/
|
||
|
|
public static CalendarSystem forName(String calendarName) {
|
||
|
|
if ("gregorian".equals(calendarName)) {
|
||
|
|
return GregorianHolder.GREGORIAN_INSTANCE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// BEGIN Android-removed: lazy initialization, use classes instead of class names.
|
||
|
|
/*
|
||
|
|
if (!initialized) {
|
||
|
|
initNames();
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
// END Android-removed: lazy initialization, use classes instead of class names.
|
||
|
|
|
||
|
|
CalendarSystem cal = calendars.get(calendarName);
|
||
|
|
if (cal != null) {
|
||
|
|
return cal;
|
||
|
|
}
|
||
|
|
|
||
|
|
// BEGIN Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
/*
|
||
|
|
String className = names.get(calendarName);
|
||
|
|
if (className == null) {
|
||
|
|
*/
|
||
|
|
Class<?> calendarClass = names.get(calendarName);
|
||
|
|
if (calendarClass == null) {
|
||
|
|
// END Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
return null; // Unknown calendar name
|
||
|
|
}
|
||
|
|
|
||
|
|
// BEGIN Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
/*
|
||
|
|
if (className.endsWith("LocalGregorianCalendar")) {
|
||
|
|
*/
|
||
|
|
if (calendarClass.isAssignableFrom(LocalGregorianCalendar.class)) {
|
||
|
|
// END Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
// Create the specific kind of local Gregorian calendar system
|
||
|
|
cal = LocalGregorianCalendar.getLocalGregorianCalendar(calendarName);
|
||
|
|
} else {
|
||
|
|
try {
|
||
|
|
// BEGIN Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
/*
|
||
|
|
@SuppressWarnings("deprecation")
|
||
|
|
Object tmp = Class.forName(className).newInstance();
|
||
|
|
cal = (CalendarSystem) tmp;
|
||
|
|
*/
|
||
|
|
cal = (CalendarSystem) calendarClass.newInstance();
|
||
|
|
// END Android-changed: avoid reflection for loading calendar classes.
|
||
|
|
} catch (Exception e) {
|
||
|
|
throw new InternalError(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (cal == null) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
CalendarSystem cs = calendars.putIfAbsent(calendarName, cal);
|
||
|
|
return (cs == null) ? cal : cs;
|
||
|
|
}
|
||
|
|
|
||
|
|
// BEGIN Android-added: load calendar Properties from resources.
|
||
|
|
/**
|
||
|
|
* Returns a {@link Properties} loaded from lib/calendars.properties.
|
||
|
|
*
|
||
|
|
* @return a {@link Properties} loaded from lib/calendars.properties
|
||
|
|
* @throws IOException if an error occurred when reading from the input stream
|
||
|
|
* @throws IllegalArgumentException if the input stream contains any malformed
|
||
|
|
* Unicode escape sequences
|
||
|
|
*/
|
||
|
|
public static Properties getCalendarProperties() throws IOException {
|
||
|
|
Properties calendarProps = new Properties();
|
||
|
|
try (InputStream is = ClassLoader.getSystemResourceAsStream("calendars.properties")) {
|
||
|
|
calendarProps.load(is);
|
||
|
|
}
|
||
|
|
return calendarProps;
|
||
|
|
}
|
||
|
|
// END Android-added: load calendar Properties from resources.
|
||
|
|
|
||
|
|
//////////////////////////////// Calendar API //////////////////////////////////
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the name of this calendar system.
|
||
|
|
*/
|
||
|
|
public abstract String getName();
|
||
|
|
|
||
|
|
public abstract CalendarDate getCalendarDate();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates calendar fields from the specified number of
|
||
|
|
* milliseconds since the Epoch, January 1, 1970 00:00:00 UTC
|
||
|
|
* (Gregorian). This method doesn't check overflow or underflow
|
||
|
|
* when adjusting the millisecond value (representing UTC) with
|
||
|
|
* the time zone offsets (i.e., the GMT offset and amount of
|
||
|
|
* daylight saving).
|
||
|
|
*
|
||
|
|
* @param millis the offset value in milliseconds from January 1,
|
||
|
|
* 1970 00:00:00 UTC (Gregorian).
|
||
|
|
* @return a <code>CalendarDate</code> instance that contains the
|
||
|
|
* calculated calendar field values.
|
||
|
|
*/
|
||
|
|
public abstract CalendarDate getCalendarDate(long millis);
|
||
|
|
|
||
|
|
public abstract CalendarDate getCalendarDate(long millis, CalendarDate date);
|
||
|
|
|
||
|
|
public abstract CalendarDate getCalendarDate(long millis, TimeZone zone);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Constructs a <code>CalendarDate</code> that is specific to this
|
||
|
|
* calendar system. All calendar fields have their initial
|
||
|
|
* values. The {@link TimeZone#getDefault() default time zone} is
|
||
|
|
* set to the instance.
|
||
|
|
*
|
||
|
|
* @return a <code>CalendarDate</code> instance that contains the initial
|
||
|
|
* calendar field values.
|
||
|
|
*/
|
||
|
|
public abstract CalendarDate newCalendarDate();
|
||
|
|
|
||
|
|
public abstract CalendarDate newCalendarDate(TimeZone zone);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the number of milliseconds since the Epoch, January 1,
|
||
|
|
* 1970 00:00:00 UTC (Gregorian), represented by the specified
|
||
|
|
* <code>CalendarDate</code>.
|
||
|
|
*
|
||
|
|
* @param date the <code>CalendarDate</code> from which the time
|
||
|
|
* value is calculated
|
||
|
|
* @return the number of milliseconds since the Epoch.
|
||
|
|
*/
|
||
|
|
public abstract long getTime(CalendarDate date);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the length in days of the specified year by
|
||
|
|
* <code>date</code>. This method does not perform the
|
||
|
|
* normalization with the specified <code>CalendarDate</code>. The
|
||
|
|
* <code>CalendarDate</code> must be normalized to get a correct
|
||
|
|
* value.
|
||
|
|
*/
|
||
|
|
public abstract int getYearLength(CalendarDate date);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the number of months of the specified year. This method
|
||
|
|
* does not perform the normalization with the specified
|
||
|
|
* <code>CalendarDate</code>. The <code>CalendarDate</code> must
|
||
|
|
* be normalized to get a correct value.
|
||
|
|
*/
|
||
|
|
public abstract int getYearLengthInMonths(CalendarDate date);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the length in days of the month specified by the calendar
|
||
|
|
* date. This method does not perform the normalization with the
|
||
|
|
* specified calendar date. The <code>CalendarDate</code> must
|
||
|
|
* be normalized to get a correct value.
|
||
|
|
*
|
||
|
|
* @param date the date from which the month value is obtained
|
||
|
|
* @return the number of days in the month
|
||
|
|
* @exception IllegalArgumentException if the specified calendar date
|
||
|
|
* doesn't have a valid month value in this calendar system.
|
||
|
|
*/
|
||
|
|
public abstract int getMonthLength(CalendarDate date); // no setter
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the length in days of a week in this calendar
|
||
|
|
* system. If this calendar system has multiple radix weeks, this
|
||
|
|
* method returns only one of them.
|
||
|
|
*/
|
||
|
|
public abstract int getWeekLength();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the <code>Era</code> designated by the era name that
|
||
|
|
* has to be known to this calendar system. If no Era is
|
||
|
|
* applicable to this calendar system, null is returned.
|
||
|
|
*
|
||
|
|
* @param eraName the name of the era
|
||
|
|
* @return the <code>Era</code> designated by
|
||
|
|
* <code>eraName</code>, or <code>null</code> if no Era is
|
||
|
|
* applicable to this calendar system or the specified era name is
|
||
|
|
* not known to this calendar system.
|
||
|
|
*/
|
||
|
|
public abstract Era getEra(String eraName);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns valid <code>Era</code>s of this calendar system. The
|
||
|
|
* return value is sorted in the descendant order. (i.e., the first
|
||
|
|
* element of the returned array is the oldest era.) If no era is
|
||
|
|
* applicable to this calendar system, <code>null</code> is returned.
|
||
|
|
*
|
||
|
|
* @return an array of valid <code>Era</code>s, or
|
||
|
|
* <code>null</code> if no era is applicable to this calendar
|
||
|
|
* system.
|
||
|
|
*/
|
||
|
|
public abstract Era[] getEras();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @throws IllegalArgumentException if the specified era name is
|
||
|
|
* unknown to this calendar system.
|
||
|
|
* @see Era
|
||
|
|
*/
|
||
|
|
public abstract void setEra(CalendarDate date, String eraName);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a <code>CalendarDate</code> of the n-th day of week
|
||
|
|
* which is on, after or before the specified date. For example, the
|
||
|
|
* first Sunday in April 2002 (Gregorian) can be obtained as
|
||
|
|
* below:
|
||
|
|
*
|
||
|
|
* <pre><code>
|
||
|
|
* Gregorian cal = CalendarSystem.getGregorianCalendar();
|
||
|
|
* CalendarDate date = cal.newCalendarDate();
|
||
|
|
* date.setDate(2004, cal.APRIL, 1);
|
||
|
|
* CalendarDate firstSun = cal.getNthDayOfWeek(1, cal.SUNDAY, date);
|
||
|
|
* // firstSun represents April 4, 2004.
|
||
|
|
* </code></pre>
|
||
|
|
*
|
||
|
|
* This method returns a new <code>CalendarDate</code> instance
|
||
|
|
* and doesn't modify the original date.
|
||
|
|
*
|
||
|
|
* @param nth specifies the n-th one. A positive number specifies
|
||
|
|
* <em>on or after</em> the <code>date</code>. A non-positive number
|
||
|
|
* specifies <em>on or before</em> the <code>date</code>.
|
||
|
|
* @param dayOfWeek the day of week
|
||
|
|
* @param date the date
|
||
|
|
* @return the date of the nth <code>dayOfWeek</code> after
|
||
|
|
* or before the specified <code>CalendarDate</code>
|
||
|
|
*/
|
||
|
|
public abstract CalendarDate getNthDayOfWeek(int nth, int dayOfWeek,
|
||
|
|
CalendarDate date);
|
||
|
|
|
||
|
|
public abstract CalendarDate setTimeOfDay(CalendarDate date, int timeOfDay);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks whether the calendar fields specified by <code>date</code>
|
||
|
|
* represents a valid date and time in this calendar system. If the
|
||
|
|
* given date is valid, <code>date</code> is marked as <em>normalized</em>.
|
||
|
|
*
|
||
|
|
* @param date the <code>CalendarDate</code> to be validated
|
||
|
|
* @return <code>true</code> if all the calendar fields are consistent,
|
||
|
|
* otherwise, <code>false</code> is returned.
|
||
|
|
* @exception NullPointerException if the specified
|
||
|
|
* <code>date</code> is <code>null</code>
|
||
|
|
*/
|
||
|
|
public abstract boolean validate(CalendarDate date);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Normalizes calendar fields in the specified
|
||
|
|
* <code>date</code>. Also all {@link CalendarDate#FIELD_UNDEFINED
|
||
|
|
* undefined} fields are set to correct values. The actual
|
||
|
|
* normalization process is calendar system dependent.
|
||
|
|
*
|
||
|
|
* @param date the calendar date to be validated
|
||
|
|
* @return <code>true</code> if all fields have been normalized;
|
||
|
|
* <code>false</code> otherwise.
|
||
|
|
* @exception NullPointerException if the specified
|
||
|
|
* <code>date</code> is <code>null</code>
|
||
|
|
*/
|
||
|
|
public abstract boolean normalize(CalendarDate date);
|
||
|
|
}
|