Back to index...

	/*
	* Copyright (c) 2012, 2013, 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.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* Copyright (c) 2011-2012, Stephen Colebourne & Michael Nascimento Santos
	*
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* * Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	*
	* * Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	*
	* * Neither the name of JSR-310 nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	package java.time.temporal;

	import static java.time.temporal.ChronoField.DAY_OF_MONTH;
	import static java.time.temporal.ChronoField.DAY_OF_WEEK;
	import static java.time.temporal.ChronoField.DAY_OF_YEAR;
	import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
	import static java.time.temporal.ChronoField.YEAR;
	import static java.time.temporal.ChronoUnit.DAYS;
	import static java.time.temporal.ChronoUnit.FOREVER;
	import static java.time.temporal.ChronoUnit.MONTHS;
	import static java.time.temporal.ChronoUnit.WEEKS;
	import static java.time.temporal.ChronoUnit.YEARS;

	import java.io.IOException;
	import java.io.InvalidObjectException;
	import java.io.ObjectInputStream;
	import java.io.Serializable;
	import java.time.DateTimeException;
	import java.time.DayOfWeek;
	import java.time.chrono.ChronoLocalDate;
	import java.time.chrono.Chronology;
	import java.time.format.ResolverStyle;
	import java.util.Locale;
	import java.util.Map;
	import java.util.Objects;
	import java.util.ResourceBundle;
	import java.util.concurrent.ConcurrentHashMap;
	import java.util.concurrent.ConcurrentMap;
	import sun.util.locale.provider.CalendarDataUtility;
	import sun.util.locale.provider.LocaleProviderAdapter;
	import sun.util.locale.provider.LocaleResources;

	/**
	* Localized definitions of the day-of-week, week-of-month and week-of-year fields.
	* <p>
	* A standard week is seven days long, but cultures have different definitions for some
	* other aspects of a week. This class represents the definition of the week, for the
	* purpose of providing {@link TemporalField} instances.
	* <p>
	* WeekFields provides five fields,
	* {@link #dayOfWeek()}, {@link #weekOfMonth()}, {@link #weekOfYear()},
	* {@link #weekOfWeekBasedYear()}, and {@link #weekBasedYear()}
	* that provide access to the values from any {@linkplain Temporal temporal object}.
	* <p>
	* The computations for day-of-week, week-of-month, and week-of-year are based
	* on the {@linkplain ChronoField#YEAR proleptic-year},
	* {@linkplain ChronoField#MONTH_OF_YEAR month-of-year},
	* {@linkplain ChronoField#DAY_OF_MONTH day-of-month}, and
	* {@linkplain ChronoField#DAY_OF_WEEK ISO day-of-week} which are based on the
	* {@linkplain ChronoField#EPOCH_DAY epoch-day} and the chronology.
	* The values may not be aligned with the {@linkplain ChronoField#YEAR_OF_ERA year-of-Era}
	* depending on the Chronology.
	* <p>A week is defined by:
	* <ul>
	* <li>The first day-of-week.
	* For example, the ISO-8601 standard considers Monday to be the first day-of-week.
	* <li>The minimal number of days in the first week.
	* For example, the ISO-8601 standard counts the first week as needing at least 4 days.
	* </ul>
	* Together these two values allow a year or month to be divided into weeks.
	*
	* <h3>Week of Month</h3>
	* One field is used: week-of-month.
	* The calculation ensures that weeks never overlap a month boundary.
	* The month is divided into periods where each period starts on the defined first day-of-week.
	* The earliest period is referred to as week 0 if it has less than the minimal number of days
	* and week 1 if it has at least the minimal number of days.
	*
	* <table cellpadding="0" cellspacing="3" border="0" style="text-align: left; width: 50%;">
	* <caption>Examples of WeekFields</caption>
	* <tr><th>Date</th><td>Day-of-week</td>
	* <td>First day: Monday<br>Minimal days: 4</td><td>First day: Monday<br>Minimal days: 5</td></tr>
	* <tr><th>2008-12-31</th><td>Wednesday</td>
	* <td>Week 5 of December 2008</td><td>Week 5 of December 2008</td></tr>
	* <tr><th>2009-01-01</th><td>Thursday</td>
	* <td>Week 1 of January 2009</td><td>Week 0 of January 2009</td></tr>
	* <tr><th>2009-01-04</th><td>Sunday</td>
	* <td>Week 1 of January 2009</td><td>Week 0 of January 2009</td></tr>
	* <tr><th>2009-01-05</th><td>Monday</td>
	* <td>Week 2 of January 2009</td><td>Week 1 of January 2009</td></tr>
	* </table>
	*
	* <h3>Week of Year</h3>
	* One field is used: week-of-year.
	* The calculation ensures that weeks never overlap a year boundary.
	* The year is divided into periods where each period starts on the defined first day-of-week.
	* The earliest period is referred to as week 0 if it has less than the minimal number of days
	* and week 1 if it has at least the minimal number of days.
	*
	* <h3>Week Based Year</h3>
	* Two fields are used for week-based-year, one for the
	* {@link #weekOfWeekBasedYear() week-of-week-based-year} and one for
	* {@link #weekBasedYear() week-based-year}. In a week-based-year, each week
	* belongs to only a single year. Week 1 of a year is the first week that
	* starts on the first day-of-week and has at least the minimum number of days.
	* The first and last weeks of a year may contain days from the
	* previous calendar year or next calendar year respectively.
	*
	* <table cellpadding="0" cellspacing="3" border="0" style="text-align: left; width: 50%;">
	* <caption>Examples of WeekFields for week-based-year</caption>
	* <tr><th>Date</th><td>Day-of-week</td>
	* <td>First day: Monday<br>Minimal days: 4</td><td>First day: Monday<br>Minimal days: 5</td></tr>
	* <tr><th>2008-12-31</th><td>Wednesday</td>
	* <td>Week 1 of 2009</td><td>Week 53 of 2008</td></tr>
	* <tr><th>2009-01-01</th><td>Thursday</td>
	* <td>Week 1 of 2009</td><td>Week 53 of 2008</td></tr>
	* <tr><th>2009-01-04</th><td>Sunday</td>
	* <td>Week 1 of 2009</td><td>Week 53 of 2008</td></tr>
	* <tr><th>2009-01-05</th><td>Monday</td>
	* <td>Week 2 of 2009</td><td>Week 1 of 2009</td></tr>
	* </table>
	*
	* @implSpec
	* This class is immutable and thread-safe.
	*
	* @since 1.8
	*/
	public final class WeekFields implements Serializable {
	// implementation notes
	// querying week-of-month or week-of-year should return the week value bound within the month/year
	// however, setting the week value should be lenient (use plus/minus weeks)
	// allow week-of-month outer range [0 to 6]
	// allow week-of-year outer range [0 to 54]
	// this is because callers shouldn't be expected to know the details of validity

	/**
	* The cache of rules by firstDayOfWeek plus minimalDays.
	* Initialized first to be available for definition of ISO, etc.
	*/
	private static final ConcurrentMap<String, WeekFields> CACHE = new ConcurrentHashMap<>(4, 0.75f, 2);

	/**
	* The ISO-8601 definition, where a week starts on Monday and the first week
	* has a minimum of 4 days.
	* <p>
	* The ISO-8601 standard defines a calendar system based on weeks.
	* It uses the week-based-year and week-of-week-based-year concepts to split
	* up the passage of days instead of the standard year/month/day.
	* <p>
	* Note that the first week may start in the previous calendar year.
	* Note also that the first few days of a calendar year may be in the
	* week-based-year corresponding to the previous calendar year.
	*/
	public static final WeekFields ISO = new WeekFields(DayOfWeek.MONDAY, 4);

	/**
	* The common definition of a week that starts on Sunday and the first week
	* has a minimum of 1 day.
	* <p>
	* Defined as starting on Sunday and with a minimum of 1 day in the month.
	* This week definition is in use in the US and other European countries.
	*/
	public static final WeekFields SUNDAY_START = WeekFields.of(DayOfWeek.SUNDAY, 1);

	/**
	* The unit that represents week-based-years for the purpose of addition and subtraction.
	* <p>
	* This allows a number of week-based-years to be added to, or subtracted from, a date.
	* The unit is equal to either 52 or 53 weeks.
	* The estimated duration of a week-based-year is the same as that of a standard ISO
	* year at {@code 365.2425 Days}.
	* <p>
	* The rules for addition add the number of week-based-years to the existing value
	* for the week-based-year field retaining the week-of-week-based-year
	* and day-of-week, unless the week number it too large for the target year.
	* In that case, the week is set to the last week of the year
	* with the same day-of-week.
	* <p>
	* This unit is an immutable and thread-safe singleton.
	*/
	public static final TemporalUnit WEEK_BASED_YEARS = IsoFields.WEEK_BASED_YEARS;

	/**
	* Serialization version.
	*/
	private static final long serialVersionUID = -1177360819670808121L;

	/**
	* The first day-of-week.
	*/
	private final DayOfWeek firstDayOfWeek;
	/**
	* The minimal number of days in the first week.
	*/
	private final int minimalDays;
	/**
	* The field used to access the computed DayOfWeek.
	*/
	private final transient TemporalField dayOfWeek = ComputedDayOfField.ofDayOfWeekField(this);
	/**
	* The field used to access the computed WeekOfMonth.
	*/
	private final transient TemporalField weekOfMonth = ComputedDayOfField.ofWeekOfMonthField(this);
	/**
	* The field used to access the computed WeekOfYear.
	*/
	private final transient TemporalField weekOfYear = ComputedDayOfField.ofWeekOfYearField(this);
	/**
	* The field that represents the week-of-week-based-year.
	* <p>
	* This field allows the week of the week-based-year value to be queried and set.
	* <p>
	* This unit is an immutable and thread-safe singleton.
	*/
	private final transient TemporalField weekOfWeekBasedYear = ComputedDayOfField.ofWeekOfWeekBasedYearField(this);
	/**
	* The field that represents the week-based-year.
	* <p>
	* This field allows the week-based-year value to be queried and set.
	* <p>
	* This unit is an immutable and thread-safe singleton.
	*/
	private final transient TemporalField weekBasedYear = ComputedDayOfField.ofWeekBasedYearField(this);

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code WeekFields} appropriate for a locale.
	* <p>
	* This will look up appropriate values from the provider of localization data.
	*
	* @param locale the locale to use, not null
	* @return the week-definition, not null
	*/
	public static WeekFields of(Locale locale) {
	Objects.requireNonNull(locale, "locale");
	locale = new Locale(locale.getLanguage(), locale.getCountry()); // elminate variants

	int calDow = CalendarDataUtility.retrieveFirstDayOfWeek(locale);
	DayOfWeek dow = DayOfWeek.SUNDAY.plus(calDow - 1);
	int minDays = CalendarDataUtility.retrieveMinimalDaysInFirstWeek(locale);
	return WeekFields.of(dow, minDays);
	}

	/**
	* Obtains an instance of {@code WeekFields} from the first day-of-week and minimal days.
	* <p>
	* The first day-of-week defines the ISO {@code DayOfWeek} that is day 1 of the week.
	* The minimal number of days in the first week defines how many days must be present
	* in a month or year, starting from the first day-of-week, before the week is counted
	* as the first week. A value of 1 will count the first day of the month or year as part
	* of the first week, whereas a value of 7 will require the whole seven days to be in
	* the new month or year.
	* <p>
	* WeekFields instances are singletons; for each unique combination
	* of {@code firstDayOfWeek} and {@code minimalDaysInFirstWeek} the
	* the same instance will be returned.
	*
	* @param firstDayOfWeek the first day of the week, not null
	* @param minimalDaysInFirstWeek the minimal number of days in the first week, from 1 to 7
	* @return the week-definition, not null
	* @throws IllegalArgumentException if the minimal days value is less than one
	* or greater than 7
	*/
	public static WeekFields of(DayOfWeek firstDayOfWeek, int minimalDaysInFirstWeek) {
	String key = firstDayOfWeek.toString() + minimalDaysInFirstWeek;
	WeekFields rules = CACHE.get(key);
	if (rules == null) {
	rules = new WeekFields(firstDayOfWeek, minimalDaysInFirstWeek);
	CACHE.putIfAbsent(key, rules);
	rules = CACHE.get(key);
	}
	return rules;
	}

	//-----------------------------------------------------------------------
	/**
	* Creates an instance of the definition.
	*
	* @param firstDayOfWeek the first day of the week, not null
	* @param minimalDaysInFirstWeek the minimal number of days in the first week, from 1 to 7
	* @throws IllegalArgumentException if the minimal days value is invalid
	*/
	private WeekFields(DayOfWeek firstDayOfWeek, int minimalDaysInFirstWeek) {
	Objects.requireNonNull(firstDayOfWeek, "firstDayOfWeek");
	if (minimalDaysInFirstWeek < 1 \|\| minimalDaysInFirstWeek > 7) {
	throw new IllegalArgumentException("Minimal number of days is invalid");
	}
	this.firstDayOfWeek = firstDayOfWeek;
	this.minimalDays = minimalDaysInFirstWeek;
	}

	//-----------------------------------------------------------------------
	/**
	* Restore the state of a WeekFields from the stream.
	* Check that the values are valid.
	*
	* @param s the stream to read
	* @throws InvalidObjectException if the serialized object has an invalid
	* value for firstDayOfWeek or minimalDays.
	* @throws ClassNotFoundException if a class cannot be resolved
	*/
	private void readObject(ObjectInputStream s)
	throws IOException, ClassNotFoundException, InvalidObjectException
	{
	s.defaultReadObject();
	if (firstDayOfWeek == null) {
	throw new InvalidObjectException("firstDayOfWeek is null");
	}

	if (minimalDays < 1 \|\| minimalDays > 7) {
	throw new InvalidObjectException("Minimal number of days is invalid");
	}
	}

	/**
	* Return the singleton WeekFields associated with the
	* {@code firstDayOfWeek} and {@code minimalDays}.
	* @return the singleton WeekFields for the firstDayOfWeek and minimalDays.
	* @throws InvalidObjectException if the serialized object has invalid
	* values for firstDayOfWeek or minimalDays.
	*/
	private Object readResolve() throws InvalidObjectException {
	try {
	return WeekFields.of(firstDayOfWeek, minimalDays);
	} catch (IllegalArgumentException iae) {
	throw new InvalidObjectException("Invalid serialized WeekFields: " + iae.getMessage());
	}
	}

	//-----------------------------------------------------------------------
	/**
	* Gets the first day-of-week.
	* <p>
	* The first day-of-week varies by culture.
	* For example, the US uses Sunday, while France and the ISO-8601 standard use Monday.
	* This method returns the first day using the standard {@code DayOfWeek} enum.
	*
	* @return the first day-of-week, not null
	*/
	public DayOfWeek getFirstDayOfWeek() {
	return firstDayOfWeek;
	}

	/**
	* Gets the minimal number of days in the first week.
	* <p>
	* The number of days considered to define the first week of a month or year
	* varies by culture.
	* For example, the ISO-8601 requires 4 days (more than half a week) to
	* be present before counting the first week.
	*
	* @return the minimal number of days in the first week of a month or year, from 1 to 7
	*/
	public int getMinimalDaysInFirstWeek() {
	return minimalDays;
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a field to access the day of week based on this {@code WeekFields}.
	* <p>
	* This is similar to {@link ChronoField#DAY_OF_WEEK} but uses values for
	* the day-of-week based on this {@code WeekFields}.
	* The days are numbered from 1 to 7 where the
	* {@link #getFirstDayOfWeek() first day-of-week} is assigned the value 1.
	* <p>
	* For example, if the first day-of-week is Sunday, then that will have the
	* value 1, with other days ranging from Monday as 2 to Saturday as 7.
	* <p>
	* In the resolving phase of parsing, a localized day-of-week will be converted
	* to a standardized {@code ChronoField} day-of-week.
	* The day-of-week must be in the valid range 1 to 7.
	* Other fields in this class build dates using the standardized day-of-week.
	*
	* @return a field providing access to the day-of-week with localized numbering, not null
	*/
	public TemporalField dayOfWeek() {
	return dayOfWeek;
	}

	/**
	* Returns a field to access the week of month based on this {@code WeekFields}.
	* <p>
	* This represents the concept of the count of weeks within the month where weeks
	* start on a fixed day-of-week, such as Monday.
	* This field is typically used with {@link WeekFields#dayOfWeek()}.
	* <p>
	* Week one (1) is the week starting on the {@link WeekFields#getFirstDayOfWeek}
	* where there are at least {@link WeekFields#getMinimalDaysInFirstWeek()} days in the month.
	* Thus, week one may start up to {@code minDays} days before the start of the month.
	* If the first week starts after the start of the month then the period before is week zero (0).
	* <p>
	* For example:<br>
	* - if the 1st day of the month is a Monday, week one starts on the 1st and there is no week zero<br>
	* - if the 2nd day of the month is a Monday, week one starts on the 2nd and the 1st is in week zero<br>
	* - if the 4th day of the month is a Monday, week one starts on the 4th and the 1st to 3rd is in week zero<br>
	* - if the 5th day of the month is a Monday, week two starts on the 5th and the 1st to 4th is in week one<br>
	* <p>
	* This field can be used with any calendar system.
	* <p>
	* In the resolving phase of parsing, a date can be created from a year,
	* week-of-month, month-of-year and day-of-week.
	* <p>
	* In {@linkplain ResolverStyle#STRICT strict mode}, all four fields are
	* validated against their range of valid values. The week-of-month field
	* is validated to ensure that the resulting month is the month requested.
	* <p>
	* In {@linkplain ResolverStyle#SMART smart mode}, all four fields are
	* validated against their range of valid values. The week-of-month field
	* is validated from 0 to 6, meaning that the resulting date can be in a
	* different month to that specified.
	* <p>
	* In {@linkplain ResolverStyle#LENIENT lenient mode}, the year and day-of-week
	* are validated against the range of valid values. The resulting date is calculated
	* equivalent to the following four stage approach.
	* First, create a date on the first day of the first week of January in the requested year.
	* Then take the month-of-year, subtract one, and add the amount in months to the date.
	* Then take the week-of-month, subtract one, and add the amount in weeks to the date.
	* Finally, adjust to the correct day-of-week within the localized week.
	*
	* @return a field providing access to the week-of-month, not null
	*/
	public TemporalField weekOfMonth() {
	return weekOfMonth;
	}

	/**
	* Returns a field to access the week of year based on this {@code WeekFields}.
	* <p>
	* This represents the concept of the count of weeks within the year where weeks
	* start on a fixed day-of-week, such as Monday.
	* This field is typically used with {@link WeekFields#dayOfWeek()}.
	* <p>
	* Week one(1) is the week starting on the {@link WeekFields#getFirstDayOfWeek}
	* where there are at least {@link WeekFields#getMinimalDaysInFirstWeek()} days in the year.
	* Thus, week one may start up to {@code minDays} days before the start of the year.
	* If the first week starts after the start of the year then the period before is week zero (0).
	* <p>
	* For example:<br>
	* - if the 1st day of the year is a Monday, week one starts on the 1st and there is no week zero<br>
	* - if the 2nd day of the year is a Monday, week one starts on the 2nd and the 1st is in week zero<br>
	* - if the 4th day of the year is a Monday, week one starts on the 4th and the 1st to 3rd is in week zero<br>
	* - if the 5th day of the year is a Monday, week two starts on the 5th and the 1st to 4th is in week one<br>
	* <p>
	* This field can be used with any calendar system.
	* <p>
	* In the resolving phase of parsing, a date can be created from a year,
	* week-of-year and day-of-week.
	* <p>
	* In {@linkplain ResolverStyle#STRICT strict mode}, all three fields are
	* validated against their range of valid values. The week-of-year field
	* is validated to ensure that the resulting year is the year requested.
	* <p>
	* In {@linkplain ResolverStyle#SMART smart mode}, all three fields are
	* validated against their range of valid values. The week-of-year field
	* is validated from 0 to 54, meaning that the resulting date can be in a
	* different year to that specified.
	* <p>
	* In {@linkplain ResolverStyle#LENIENT lenient mode}, the year and day-of-week
	* are validated against the range of valid values. The resulting date is calculated
	* equivalent to the following three stage approach.
	* First, create a date on the first day of the first week in the requested year.
	* Then take the week-of-year, subtract one, and add the amount in weeks to the date.
	* Finally, adjust to the correct day-of-week within the localized week.
	*
	* @return a field providing access to the week-of-year, not null
	*/
	public TemporalField weekOfYear() {
	return weekOfYear;
	}

	/**
	* Returns a field to access the week of a week-based-year based on this {@code WeekFields}.
	* <p>
	* This represents the concept of the count of weeks within the year where weeks
	* start on a fixed day-of-week, such as Monday and each week belongs to exactly one year.
	* This field is typically used with {@link WeekFields#dayOfWeek()} and
	* {@link WeekFields#weekBasedYear()}.
	* <p>
	* Week one(1) is the week starting on the {@link WeekFields#getFirstDayOfWeek}
	* where there are at least {@link WeekFields#getMinimalDaysInFirstWeek()} days in the year.
	* If the first week starts after the start of the year then the period before
	* is in the last week of the previous year.
	* <p>
	* For example:<br>
	* - if the 1st day of the year is a Monday, week one starts on the 1st<br>
	* - if the 2nd day of the year is a Monday, week one starts on the 2nd and
	* the 1st is in the last week of the previous year<br>
	* - if the 4th day of the year is a Monday, week one starts on the 4th and
	* the 1st to 3rd is in the last week of the previous year<br>
	* - if the 5th day of the year is a Monday, week two starts on the 5th and
	* the 1st to 4th is in week one<br>
	* <p>
	* This field can be used with any calendar system.
	* <p>
	* In the resolving phase of parsing, a date can be created from a week-based-year,
	* week-of-year and day-of-week.
	* <p>
	* In {@linkplain ResolverStyle#STRICT strict mode}, all three fields are
	* validated against their range of valid values. The week-of-year field
	* is validated to ensure that the resulting week-based-year is the
	* week-based-year requested.
	* <p>
	* In {@linkplain ResolverStyle#SMART smart mode}, all three fields are
	* validated against their range of valid values. The week-of-week-based-year field
	* is validated from 1 to 53, meaning that the resulting date can be in the
	* following week-based-year to that specified.
	* <p>
	* In {@linkplain ResolverStyle#LENIENT lenient mode}, the year and day-of-week
	* are validated against the range of valid values. The resulting date is calculated
	* equivalent to the following three stage approach.
	* First, create a date on the first day of the first week in the requested week-based-year.
	* Then take the week-of-week-based-year, subtract one, and add the amount in weeks to the date.
	* Finally, adjust to the correct day-of-week within the localized week.
	*
	* @return a field providing access to the week-of-week-based-year, not null
	*/
	public TemporalField weekOfWeekBasedYear() {
	return weekOfWeekBasedYear;
	}

	/**
	* Returns a field to access the year of a week-based-year based on this {@code WeekFields}.
	* <p>
	* This represents the concept of the year where weeks start on a fixed day-of-week,
	* such as Monday and each week belongs to exactly one year.
	* This field is typically used with {@link WeekFields#dayOfWeek()} and
	* {@link WeekFields#weekOfWeekBasedYear()}.
	* <p>
	* Week one(1) is the week starting on the {@link WeekFields#getFirstDayOfWeek}
	* where there are at least {@link WeekFields#getMinimalDaysInFirstWeek()} days in the year.
	* Thus, week one may start before the start of the year.
	* If the first week starts after the start of the year then the period before
	* is in the last week of the previous year.
	* <p>
	* This field can be used with any calendar system.
	* <p>
	* In the resolving phase of parsing, a date can be created from a week-based-year,
	* week-of-year and day-of-week.
	* <p>
	* In {@linkplain ResolverStyle#STRICT strict mode}, all three fields are
	* validated against their range of valid values. The week-of-year field
	* is validated to ensure that the resulting week-based-year is the
	* week-based-year requested.
	* <p>
	* In {@linkplain ResolverStyle#SMART smart mode}, all three fields are
	* validated against their range of valid values. The week-of-week-based-year field
	* is validated from 1 to 53, meaning that the resulting date can be in the
	* following week-based-year to that specified.
	* <p>
	* In {@linkplain ResolverStyle#LENIENT lenient mode}, the year and day-of-week
	* are validated against the range of valid values. The resulting date is calculated
	* equivalent to the following three stage approach.
	* First, create a date on the first day of the first week in the requested week-based-year.
	* Then take the week-of-week-based-year, subtract one, and add the amount in weeks to the date.
	* Finally, adjust to the correct day-of-week within the localized week.
	*
	* @return a field providing access to the week-based-year, not null
	*/
	public TemporalField weekBasedYear() {
	return weekBasedYear;
	}

	//-----------------------------------------------------------------------
	/**
	* Checks if this {@code WeekFields} is equal to the specified object.
	* <p>
	* The comparison is based on the entire state of the rules, which is
	* the first day-of-week and minimal days.
	*
	* @param object the other rules to compare to, null returns false
	* @return true if this is equal to the specified rules
	*/
	@Override
	public boolean equals(Object object) {
	if (this == object) {
	return true;
	}
	if (object instanceof WeekFields) {
	return hashCode() == object.hashCode();
	}
	return false;
	}

	/**
	* A hash code for this {@code WeekFields}.
	*
	* @return a suitable hash code
	*/
	@Override
	public int hashCode() {
	return firstDayOfWeek.ordinal() * 7 + minimalDays;
	}

	//-----------------------------------------------------------------------
	/**
	* A string representation of this {@code WeekFields} instance.
	*
	* @return the string representation, not null
	*/
	@Override
	public String toString() {
	return "WeekFields[" + firstDayOfWeek + ',' + minimalDays + ']';
	}

	//-----------------------------------------------------------------------
	/**
	* Field type that computes DayOfWeek, WeekOfMonth, and WeekOfYear
	* based on a WeekFields.
	* A separate Field instance is required for each different WeekFields;
	* combination of start of week and minimum number of days.
	* Constructors are provided to create fields for DayOfWeek, WeekOfMonth,
	* and WeekOfYear.
	*/
	static class ComputedDayOfField implements TemporalField {

	/**
	* Returns a field to access the day of week,
	* computed based on a WeekFields.
	* <p>
	* The WeekDefintion of the first day of the week is used with
	* the ISO DAY_OF_WEEK field to compute week boundaries.
	*/
	static ComputedDayOfField ofDayOfWeekField(WeekFields weekDef) {
	return new ComputedDayOfField("DayOfWeek", weekDef, DAYS, WEEKS, DAY_OF_WEEK_RANGE);
	}

	/**
	* Returns a field to access the week of month,
	* computed based on a WeekFields.
	* @see WeekFields#weekOfMonth()
	*/
	static ComputedDayOfField ofWeekOfMonthField(WeekFields weekDef) {
	return new ComputedDayOfField("WeekOfMonth", weekDef, WEEKS, MONTHS, WEEK_OF_MONTH_RANGE);
	}

	/**
	* Returns a field to access the week of year,
	* computed based on a WeekFields.
	* @see WeekFields#weekOfYear()
	*/
	static ComputedDayOfField ofWeekOfYearField(WeekFields weekDef) {
	return new ComputedDayOfField("WeekOfYear", weekDef, WEEKS, YEARS, WEEK_OF_YEAR_RANGE);
	}

	/**
	* Returns a field to access the week of week-based-year,
	* computed based on a WeekFields.
	* @see WeekFields#weekOfWeekBasedYear()
	*/
	static ComputedDayOfField ofWeekOfWeekBasedYearField(WeekFields weekDef) {
	return new ComputedDayOfField("WeekOfWeekBasedYear", weekDef, WEEKS, IsoFields.WEEK_BASED_YEARS, WEEK_OF_WEEK_BASED_YEAR_RANGE);
	}

	/**
	* Returns a field to access the week of week-based-year,
	* computed based on a WeekFields.
	* @see WeekFields#weekBasedYear()
	*/
	static ComputedDayOfField ofWeekBasedYearField(WeekFields weekDef) {
	return new ComputedDayOfField("WeekBasedYear", weekDef, IsoFields.WEEK_BASED_YEARS, FOREVER, ChronoField.YEAR.range());
	}

	/**
	* Return a new week-based-year date of the Chronology, year, week-of-year,
	* and dow of week.
	* @param chrono The chronology of the new date
	* @param yowby the year of the week-based-year
	* @param wowby the week of the week-based-year
	* @param dow the day of the week
	* @return a ChronoLocalDate for the requested year, week of year, and day of week
	*/
	private ChronoLocalDate ofWeekBasedYear(Chronology chrono,
	int yowby, int wowby, int dow) {
	ChronoLocalDate date = chrono.date(yowby, 1, 1);
	int ldow = localizedDayOfWeek(date);
	int offset = startOfWeekOffset(1, ldow);

	// Clamp the week of year to keep it in the same year
	int yearLen = date.lengthOfYear();
	int newYearWeek = computeWeek(offset, yearLen + weekDef.getMinimalDaysInFirstWeek());
	wowby = Math.min(wowby, newYearWeek - 1);

	int days = -offset + (dow - 1) + (wowby - 1) * 7;
	return date.plus(days, DAYS);
	}

	private final String name;
	private final WeekFields weekDef;
	private final TemporalUnit baseUnit;
	private final TemporalUnit rangeUnit;
	private final ValueRange range;

	private ComputedDayOfField(String name, WeekFields weekDef, TemporalUnit baseUnit, TemporalUnit rangeUnit, ValueRange range) {
	this.name = name;
	this.weekDef = weekDef;
	this.baseUnit = baseUnit;
	this.rangeUnit = rangeUnit;
	this.range = range;
	}

	private static final ValueRange DAY_OF_WEEK_RANGE = ValueRange.of(1, 7);
	private static final ValueRange WEEK_OF_MONTH_RANGE = ValueRange.of(0, 1, 4, 6);
	private static final ValueRange WEEK_OF_YEAR_RANGE = ValueRange.of(0, 1, 52, 54);
	private static final ValueRange WEEK_OF_WEEK_BASED_YEAR_RANGE = ValueRange.of(1, 52, 53);

	@Override
	public long getFrom(TemporalAccessor temporal) {
	if (rangeUnit == WEEKS) { // day-of-week
	return localizedDayOfWeek(temporal);
	} else if (rangeUnit == MONTHS) { // week-of-month
	return localizedWeekOfMonth(temporal);
	} else if (rangeUnit == YEARS) { // week-of-year
	return localizedWeekOfYear(temporal);
	} else if (rangeUnit == WEEK_BASED_YEARS) {
	return localizedWeekOfWeekBasedYear(temporal);
	} else if (rangeUnit == FOREVER) {
	return localizedWeekBasedYear(temporal);
	} else {
	throw new IllegalStateException("unreachable, rangeUnit: " + rangeUnit + ", this: " + this);
	}
	}

	private int localizedDayOfWeek(TemporalAccessor temporal) {
	int sow = weekDef.getFirstDayOfWeek().getValue();
	int isoDow = temporal.get(DAY_OF_WEEK);
	return Math.floorMod(isoDow - sow, 7) + 1;
	}

	private int localizedDayOfWeek(int isoDow) {
	int sow = weekDef.getFirstDayOfWeek().getValue();
	return Math.floorMod(isoDow - sow, 7) + 1;
	}

	private long localizedWeekOfMonth(TemporalAccessor temporal) {
	int dow = localizedDayOfWeek(temporal);
	int dom = temporal.get(DAY_OF_MONTH);
	int offset = startOfWeekOffset(dom, dow);
	return computeWeek(offset, dom);
	}

	private long localizedWeekOfYear(TemporalAccessor temporal) {
	int dow = localizedDayOfWeek(temporal);
	int doy = temporal.get(DAY_OF_YEAR);
	int offset = startOfWeekOffset(doy, dow);
	return computeWeek(offset, doy);
	}

	/**
	* Returns the year of week-based-year for the temporal.
	* The year can be the previous year, the current year, or the next year.
	* @param temporal a date of any chronology, not null
	* @return the year of week-based-year for the date
	*/
	private int localizedWeekBasedYear(TemporalAccessor temporal) {
	int dow = localizedDayOfWeek(temporal);
	int year = temporal.get(YEAR);
	int doy = temporal.get(DAY_OF_YEAR);
	int offset = startOfWeekOffset(doy, dow);
	int week = computeWeek(offset, doy);
	if (week == 0) {
	// Day is in end of week of previous year; return the previous year
	return year - 1;
	} else {
	// If getting close to end of year, use higher precision logic
	// Check if date of year is in partial week associated with next year
	ValueRange dayRange = temporal.range(DAY_OF_YEAR);
	int yearLen = (int)dayRange.getMaximum();
	int newYearWeek = computeWeek(offset, yearLen + weekDef.getMinimalDaysInFirstWeek());
	if (week >= newYearWeek) {
	return year + 1;
	}
	}
	return year;
	}

	/**
	* Returns the week of week-based-year for the temporal.
	* The week can be part of the previous year, the current year,
	* or the next year depending on the week start and minimum number
	* of days.
	* @param temporal a date of any chronology
	* @return the week of the year
	* @see #localizedWeekBasedYear(java.time.temporal.TemporalAccessor)
	*/
	private int localizedWeekOfWeekBasedYear(TemporalAccessor temporal) {
	int dow = localizedDayOfWeek(temporal);
	int doy = temporal.get(DAY_OF_YEAR);
	int offset = startOfWeekOffset(doy, dow);
	int week = computeWeek(offset, doy);
	if (week == 0) {
	// Day is in end of week of previous year
	// Recompute from the last day of the previous year
	ChronoLocalDate date = Chronology.from(temporal).date(temporal);
	date = date.minus(doy, DAYS); // Back down into previous year
	return localizedWeekOfWeekBasedYear(date);
	} else if (week > 50) {
	// If getting close to end of year, use higher precision logic
	// Check if date of year is in partial week associated with next year
	ValueRange dayRange = temporal.range(DAY_OF_YEAR);
	int yearLen = (int)dayRange.getMaximum();
	int newYearWeek = computeWeek(offset, yearLen + weekDef.getMinimalDaysInFirstWeek());
	if (week >= newYearWeek) {
	// Overlaps with week of following year; reduce to week in following year
	week = week - newYearWeek + 1;
	}
	}
	return week;
	}

	/**
	* Returns an offset to align week start with a day of month or day of year.
	*
	* @param day the day; 1 through infinity
	* @param dow the day of the week of that day; 1 through 7
	* @return an offset in days to align a day with the start of the first 'full' week
	*/
	private int startOfWeekOffset(int day, int dow) {
	// offset of first day corresponding to the day of week in first 7 days (zero origin)
	int weekStart = Math.floorMod(day - dow, 7);
	int offset = -weekStart;
	if (weekStart + 1 > weekDef.getMinimalDaysInFirstWeek()) {
	// The previous week has the minimum days in the current month to be a 'week'
	offset = 7 - weekStart;
	}
	return offset;
	}

	/**
	* Returns the week number computed from the reference day and reference dayOfWeek.
	*
	* @param offset the offset to align a date with the start of week
	* from {@link #startOfWeekOffset}.
	* @param day the day for which to compute the week number
	* @return the week number where zero is used for a partial week and 1 for the first full week
	*/
	private int computeWeek(int offset, int day) {
	return ((7 + offset + (day - 1)) / 7);
	}

	@SuppressWarnings("unchecked")
	@Override
	public <R extends Temporal> R adjustInto(R temporal, long newValue) {
	// Check the new value and get the old value of the field
	int newVal = range.checkValidIntValue(newValue, this); // lenient check range
	int currentVal = temporal.get(this);
	if (newVal == currentVal) {
	return temporal;
	}

	if (rangeUnit == FOREVER) { // replace year of WeekBasedYear
	// Create a new date object with the same chronology,
	// the desired year and the same week and dow.
	int idow = temporal.get(weekDef.dayOfWeek);
	int wowby = temporal.get(weekDef.weekOfWeekBasedYear);
	return (R) ofWeekBasedYear(Chronology.from(temporal), (int)newValue, wowby, idow);
	} else {
	// Compute the difference and add that using the base unit of the field
	return (R) temporal.plus(newVal - currentVal, baseUnit);
	}
	}

	@Override
	public ChronoLocalDate resolve(
	Map<TemporalField, Long> fieldValues, TemporalAccessor partialTemporal, ResolverStyle resolverStyle) {
	final long value = fieldValues.get(this);
	final int newValue = Math.toIntExact(value); // broad limit makes overflow checking lighter
	// first convert localized day-of-week to ISO day-of-week
	// doing this first handles case where both ISO and localized were parsed and might mismatch
	// day-of-week is always strict as two different day-of-week values makes lenient complex
	if (rangeUnit == WEEKS) { // day-of-week
	final int checkedValue = range.checkValidIntValue(value, this); // no leniency as too complex
	final int startDow = weekDef.getFirstDayOfWeek().getValue();
	long isoDow = Math.floorMod((startDow - 1) + (checkedValue - 1), 7) + 1;
	fieldValues.remove(this);
	fieldValues.put(DAY_OF_WEEK, isoDow);
	return null;
	}

	// can only build date if ISO day-of-week is present
	if (fieldValues.containsKey(DAY_OF_WEEK) == false) {
	return null;
	}
	int isoDow = DAY_OF_WEEK.checkValidIntValue(fieldValues.get(DAY_OF_WEEK));
	int dow = localizedDayOfWeek(isoDow);

	// build date
	Chronology chrono = Chronology.from(partialTemporal);
	if (fieldValues.containsKey(YEAR)) {
	int year = YEAR.checkValidIntValue(fieldValues.get(YEAR)); // validate
	if (rangeUnit == MONTHS && fieldValues.containsKey(MONTH_OF_YEAR)) { // week-of-month
	long month = fieldValues.get(MONTH_OF_YEAR); // not validated yet
	return resolveWoM(fieldValues, chrono, year, month, newValue, dow, resolverStyle);
	}
	if (rangeUnit == YEARS) { // week-of-year
	return resolveWoY(fieldValues, chrono, year, newValue, dow, resolverStyle);
	}
	} else if ((rangeUnit == WEEK_BASED_YEARS \|\| rangeUnit == FOREVER) &&
	fieldValues.containsKey(weekDef.weekBasedYear) &&
	fieldValues.containsKey(weekDef.weekOfWeekBasedYear)) { // week-of-week-based-year and year-of-week-based-year
	return resolveWBY(fieldValues, chrono, dow, resolverStyle);
	}
	return null;
	}

	private ChronoLocalDate resolveWoM(
	Map<TemporalField, Long> fieldValues, Chronology chrono, int year, long month, long wom, int localDow, ResolverStyle resolverStyle) {
	ChronoLocalDate date;
	if (resolverStyle == ResolverStyle.LENIENT) {
	date = chrono.date(year, 1, 1).plus(Math.subtractExact(month, 1), MONTHS);
	long weeks = Math.subtractExact(wom, localizedWeekOfMonth(date));
	int days = localDow - localizedDayOfWeek(date); // safe from overflow
	date = date.plus(Math.addExact(Math.multiplyExact(weeks, 7), days), DAYS);
	} else {
	int monthValid = MONTH_OF_YEAR.checkValidIntValue(month); // validate
	date = chrono.date(year, monthValid, 1);
	int womInt = range.checkValidIntValue(wom, this); // validate
	int weeks = (int) (womInt - localizedWeekOfMonth(date)); // safe from overflow
	int days = localDow - localizedDayOfWeek(date); // safe from overflow
	date = date.plus(weeks * 7 + days, DAYS);
	if (resolverStyle == ResolverStyle.STRICT && date.getLong(MONTH_OF_YEAR) != month) {
	throw new DateTimeException("Strict mode rejected resolved date as it is in a different month");
	}
	}
	fieldValues.remove(this);
	fieldValues.remove(YEAR);
	fieldValues.remove(MONTH_OF_YEAR);
	fieldValues.remove(DAY_OF_WEEK);
	return date;
	}

	private ChronoLocalDate resolveWoY(
	Map<TemporalField, Long> fieldValues, Chronology chrono, int year, long woy, int localDow, ResolverStyle resolverStyle) {
	ChronoLocalDate date = chrono.date(year, 1, 1);
	if (resolverStyle == ResolverStyle.LENIENT) {
	long weeks = Math.subtractExact(woy, localizedWeekOfYear(date));
	int days = localDow - localizedDayOfWeek(date); // safe from overflow
	date = date.plus(Math.addExact(Math.multiplyExact(weeks, 7), days), DAYS);
	} else {
	int womInt = range.checkValidIntValue(woy, this); // validate
	int weeks = (int) (womInt - localizedWeekOfYear(date)); // safe from overflow
	int days = localDow - localizedDayOfWeek(date); // safe from overflow
	date = date.plus(weeks * 7 + days, DAYS);
	if (resolverStyle == ResolverStyle.STRICT && date.getLong(YEAR) != year) {
	throw new DateTimeException("Strict mode rejected resolved date as it is in a different year");
	}
	}
	fieldValues.remove(this);
	fieldValues.remove(YEAR);
	fieldValues.remove(DAY_OF_WEEK);
	return date;
	}

	private ChronoLocalDate resolveWBY(
	Map<TemporalField, Long> fieldValues, Chronology chrono, int localDow, ResolverStyle resolverStyle) {
	int yowby = weekDef.weekBasedYear.range().checkValidIntValue(
	fieldValues.get(weekDef.weekBasedYear), weekDef.weekBasedYear);
	ChronoLocalDate date;
	if (resolverStyle == ResolverStyle.LENIENT) {
	date = ofWeekBasedYear(chrono, yowby, 1, localDow);
	long wowby = fieldValues.get(weekDef.weekOfWeekBasedYear);
	long weeks = Math.subtractExact(wowby, 1);
	date = date.plus(weeks, WEEKS);
	} else {
	int wowby = weekDef.weekOfWeekBasedYear.range().checkValidIntValue(
	fieldValues.get(weekDef.weekOfWeekBasedYear), weekDef.weekOfWeekBasedYear); // validate
	date = ofWeekBasedYear(chrono, yowby, wowby, localDow);
	if (resolverStyle == ResolverStyle.STRICT && localizedWeekBasedYear(date) != yowby) {
	throw new DateTimeException("Strict mode rejected resolved date as it is in a different week-based-year");
	}
	}
	fieldValues.remove(this);
	fieldValues.remove(weekDef.weekBasedYear);
	fieldValues.remove(weekDef.weekOfWeekBasedYear);
	fieldValues.remove(DAY_OF_WEEK);
	return date;
	}

	//-----------------------------------------------------------------------
	@Override
	public String getDisplayName(Locale locale) {
	Objects.requireNonNull(locale, "locale");
	if (rangeUnit == YEARS) { // only have values for week-of-year
	LocaleResources lr = LocaleProviderAdapter.getResourceBundleBased()
	.getLocaleResources(locale);
	ResourceBundle rb = lr.getJavaTimeFormatData();
	return rb.containsKey("field.week") ? rb.getString("field.week") : name;
	}
	return name;
	}

	@Override
	public TemporalUnit getBaseUnit() {
	return baseUnit;
	}

	@Override
	public TemporalUnit getRangeUnit() {
	return rangeUnit;
	}

	@Override
	public boolean isDateBased() {
	return true;
	}

	@Override
	public boolean isTimeBased() {
	return false;
	}

	@Override
	public ValueRange range() {
	return range;
	}

	//-----------------------------------------------------------------------
	@Override
	public boolean isSupportedBy(TemporalAccessor temporal) {
	if (temporal.isSupported(DAY_OF_WEEK)) {
	if (rangeUnit == WEEKS) { // day-of-week
	return true;
	} else if (rangeUnit == MONTHS) { // week-of-month
	return temporal.isSupported(DAY_OF_MONTH);
	} else if (rangeUnit == YEARS) { // week-of-year
	return temporal.isSupported(DAY_OF_YEAR);
	} else if (rangeUnit == WEEK_BASED_YEARS) {
	return temporal.isSupported(DAY_OF_YEAR);
	} else if (rangeUnit == FOREVER) {
	return temporal.isSupported(YEAR);
	}
	}
	return false;
	}

	@Override
	public ValueRange rangeRefinedBy(TemporalAccessor temporal) {
	if (rangeUnit == ChronoUnit.WEEKS) { // day-of-week
	return range;
	} else if (rangeUnit == MONTHS) { // week-of-month
	return rangeByWeek(temporal, DAY_OF_MONTH);
	} else if (rangeUnit == YEARS) { // week-of-year
	return rangeByWeek(temporal, DAY_OF_YEAR);
	} else if (rangeUnit == WEEK_BASED_YEARS) {
	return rangeWeekOfWeekBasedYear(temporal);
	} else if (rangeUnit == FOREVER) {
	return YEAR.range();
	} else {
	throw new IllegalStateException("unreachable, rangeUnit: " + rangeUnit + ", this: " + this);
	}
	}

	/**
	* Map the field range to a week range
	* @param temporal the temporal
	* @param field the field to get the range of
	* @return the ValueRange with the range adjusted to weeks.
	*/
	private ValueRange rangeByWeek(TemporalAccessor temporal, TemporalField field) {
	int dow = localizedDayOfWeek(temporal);
	int offset = startOfWeekOffset(temporal.get(field), dow);
	ValueRange fieldRange = temporal.range(field);
	return ValueRange.of(computeWeek(offset, (int) fieldRange.getMinimum()),
	computeWeek(offset, (int) fieldRange.getMaximum()));
	}

	/**
	* Map the field range to a week range of a week year.
	* @param temporal the temporal
	* @return the ValueRange with the range adjusted to weeks.
	*/
	private ValueRange rangeWeekOfWeekBasedYear(TemporalAccessor temporal) {
	if (!temporal.isSupported(DAY_OF_YEAR)) {
	return WEEK_OF_YEAR_RANGE;
	}
	int dow = localizedDayOfWeek(temporal);
	int doy = temporal.get(DAY_OF_YEAR);
	int offset = startOfWeekOffset(doy, dow);
	int week = computeWeek(offset, doy);
	if (week == 0) {
	// Day is in end of week of previous year
	// Recompute from the last day of the previous year
	ChronoLocalDate date = Chronology.from(temporal).date(temporal);
	date = date.minus(doy + 7, DAYS); // Back down into previous year
	return rangeWeekOfWeekBasedYear(date);
	}
	// Check if day of year is in partial week associated with next year
	ValueRange dayRange = temporal.range(DAY_OF_YEAR);
	int yearLen = (int)dayRange.getMaximum();
	int newYearWeek = computeWeek(offset, yearLen + weekDef.getMinimalDaysInFirstWeek());

	if (week >= newYearWeek) {
	// Overlaps with weeks of following year; recompute from a week in following year
	ChronoLocalDate date = Chronology.from(temporal).date(temporal);
	date = date.plus(yearLen - doy + 1 + 7, ChronoUnit.DAYS);
	return rangeWeekOfWeekBasedYear(date);
	}
	return ValueRange.of(1, newYearWeek-1);
	}

	//-----------------------------------------------------------------------
	@Override
	public String toString() {
	return name + "[" + weekDef.toString() + "]";
	}
	}
	}

Back to index...