| /* |
| * Copyright (c) 2012, 2015, 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) 2007-2012, 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; |
| |
| import static java.time.temporal.ChronoField.DAY_OF_MONTH; |
| import static java.time.temporal.ChronoField.MONTH_OF_YEAR; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectInputStream; |
| import java.io.Serializable; |
| import java.time.chrono.Chronology; |
| import java.time.chrono.IsoChronology; |
| import java.time.format.DateTimeFormatter; |
| import java.time.format.DateTimeFormatterBuilder; |
| import java.time.format.DateTimeParseException; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalAccessor; |
| import java.time.temporal.TemporalAdjuster; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.TemporalQueries; |
| import java.time.temporal.TemporalQuery; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.time.temporal.ValueRange; |
| import java.util.Objects; |
| |
| // Android-changed: removed ValueBased paragraph. |
| /** |
| * A month-day in the ISO-8601 calendar system, such as {@code --12-03}. |
| * <p> |
| * {@code MonthDay} is an immutable date-time object that represents the combination |
| * of a month and day-of-month. Any field that can be derived from a month and day, |
| * such as quarter-of-year, can be obtained. |
| * <p> |
| * This class does not store or represent a year, time or time-zone. |
| * For example, the value "December 3rd" can be stored in a {@code MonthDay}. |
| * <p> |
| * Since a {@code MonthDay} does not possess a year, the leap day of |
| * February 29th is considered valid. |
| * <p> |
| * This class implements {@link TemporalAccessor} rather than {@link Temporal}. |
| * This is because it is not possible to define whether February 29th is valid or not |
| * without external information, preventing the implementation of plus/minus. |
| * Related to this, {@code MonthDay} only provides access to query and set the fields |
| * {@code MONTH_OF_YEAR} and {@code DAY_OF_MONTH}. |
| * <p> |
| * The ISO-8601 calendar system is the modern civil calendar system used today |
| * in most of the world. It is equivalent to the proleptic Gregorian calendar |
| * system, in which today's rules for leap years are applied for all time. |
| * For most applications written today, the ISO-8601 rules are entirely suitable. |
| * However, any application that makes use of historical dates, and requires them |
| * to be accurate will find the ISO-8601 approach unsuitable. |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class MonthDay |
| implements TemporalAccessor, TemporalAdjuster, Comparable<MonthDay>, Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = -939150713474957432L; |
| /** |
| * Parser. |
| */ |
| private static final DateTimeFormatter PARSER = new DateTimeFormatterBuilder() |
| .appendLiteral("--") |
| .appendValue(MONTH_OF_YEAR, 2) |
| .appendLiteral('-') |
| .appendValue(DAY_OF_MONTH, 2) |
| .toFormatter(); |
| |
| /** |
| * The month-of-year, not null. |
| */ |
| private final int month; |
| /** |
| * The day-of-month. |
| */ |
| private final int day; |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains the current month-day from the system clock in the default time-zone. |
| * <p> |
| * This will query the {@link Clock#systemDefaultZone() system clock} in the default |
| * time-zone to obtain the current month-day. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @return the current month-day using the system clock and default time-zone, not null |
| */ |
| public static MonthDay now() { |
| return now(Clock.systemDefaultZone()); |
| } |
| |
| /** |
| * Obtains the current month-day from the system clock in the specified time-zone. |
| * <p> |
| * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current month-day. |
| * Specifying the time-zone avoids dependence on the default time-zone. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @param zone the zone ID to use, not null |
| * @return the current month-day using the system clock, not null |
| */ |
| public static MonthDay now(ZoneId zone) { |
| return now(Clock.system(zone)); |
| } |
| |
| /** |
| * Obtains the current month-day from the specified clock. |
| * <p> |
| * This will query the specified clock to obtain the current month-day. |
| * Using this method allows the use of an alternate clock for testing. |
| * The alternate clock may be introduced using {@link Clock dependency injection}. |
| * |
| * @param clock the clock to use, not null |
| * @return the current month-day, not null |
| */ |
| public static MonthDay now(Clock clock) { |
| final LocalDate now = LocalDate.now(clock); // called once |
| return MonthDay.of(now.getMonth(), now.getDayOfMonth()); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance of {@code MonthDay}. |
| * <p> |
| * The day-of-month must be valid for the month within a leap year. |
| * Hence, for February, day 29 is valid. |
| * <p> |
| * For example, passing in April and day 31 will throw an exception, as |
| * there can never be April 31st in any year. By contrast, passing in |
| * February 29th is permitted, as that month-day can sometimes be valid. |
| * |
| * @param month the month-of-year to represent, not null |
| * @param dayOfMonth the day-of-month to represent, from 1 to 31 |
| * @return the month-day, not null |
| * @throws DateTimeException if the value of any field is out of range, |
| * or if the day-of-month is invalid for the month |
| */ |
| public static MonthDay of(Month month, int dayOfMonth) { |
| Objects.requireNonNull(month, "month"); |
| DAY_OF_MONTH.checkValidValue(dayOfMonth); |
| if (dayOfMonth > month.maxLength()) { |
| throw new DateTimeException("Illegal value for DayOfMonth field, value " + dayOfMonth + |
| " is not valid for month " + month.name()); |
| } |
| return new MonthDay(month.getValue(), dayOfMonth); |
| } |
| |
| /** |
| * Obtains an instance of {@code MonthDay}. |
| * <p> |
| * The day-of-month must be valid for the month within a leap year. |
| * Hence, for month 2 (February), day 29 is valid. |
| * <p> |
| * For example, passing in month 4 (April) and day 31 will throw an exception, as |
| * there can never be April 31st in any year. By contrast, passing in |
| * February 29th is permitted, as that month-day can sometimes be valid. |
| * |
| * @param month the month-of-year to represent, from 1 (January) to 12 (December) |
| * @param dayOfMonth the day-of-month to represent, from 1 to 31 |
| * @return the month-day, not null |
| * @throws DateTimeException if the value of any field is out of range, |
| * or if the day-of-month is invalid for the month |
| */ |
| public static MonthDay of(int month, int dayOfMonth) { |
| return of(Month.of(month), dayOfMonth); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance of {@code MonthDay} from a temporal object. |
| * <p> |
| * This obtains a month-day based on the specified temporal. |
| * A {@code TemporalAccessor} represents an arbitrary set of date and time information, |
| * which this factory converts to an instance of {@code MonthDay}. |
| * <p> |
| * The conversion extracts the {@link ChronoField#MONTH_OF_YEAR MONTH_OF_YEAR} and |
| * {@link ChronoField#DAY_OF_MONTH DAY_OF_MONTH} fields. |
| * The extraction is only permitted if the temporal object has an ISO |
| * chronology, or can be converted to a {@code LocalDate}. |
| * <p> |
| * This method matches the signature of the functional interface {@link TemporalQuery} |
| * allowing it to be used as a query via method reference, {@code MonthDay::from}. |
| * |
| * @param temporal the temporal object to convert, not null |
| * @return the month-day, not null |
| * @throws DateTimeException if unable to convert to a {@code MonthDay} |
| */ |
| public static MonthDay from(TemporalAccessor temporal) { |
| if (temporal instanceof MonthDay) { |
| return (MonthDay) temporal; |
| } |
| try { |
| if (IsoChronology.INSTANCE.equals(Chronology.from(temporal)) == false) { |
| temporal = LocalDate.from(temporal); |
| } |
| return of(temporal.get(MONTH_OF_YEAR), temporal.get(DAY_OF_MONTH)); |
| } catch (DateTimeException ex) { |
| throw new DateTimeException("Unable to obtain MonthDay from TemporalAccessor: " + |
| temporal + " of type " + temporal.getClass().getName(), ex); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance of {@code MonthDay} from a text string such as {@code --12-03}. |
| * <p> |
| * The string must represent a valid month-day. |
| * The format is {@code --MM-dd}. |
| * |
| * @param text the text to parse such as "--12-03", not null |
| * @return the parsed month-day, not null |
| * @throws DateTimeParseException if the text cannot be parsed |
| */ |
| public static MonthDay parse(CharSequence text) { |
| return parse(text, PARSER); |
| } |
| |
| /** |
| * Obtains an instance of {@code MonthDay} from a text string using a specific formatter. |
| * <p> |
| * The text is parsed using the formatter, returning a month-day. |
| * |
| * @param text the text to parse, not null |
| * @param formatter the formatter to use, not null |
| * @return the parsed month-day, not null |
| * @throws DateTimeParseException if the text cannot be parsed |
| */ |
| public static MonthDay parse(CharSequence text, DateTimeFormatter formatter) { |
| Objects.requireNonNull(formatter, "formatter"); |
| return formatter.parse(text, MonthDay::from); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Constructor, previously validated. |
| * |
| * @param month the month-of-year to represent, validated from 1 to 12 |
| * @param dayOfMonth the day-of-month to represent, validated from 1 to 29-31 |
| */ |
| private MonthDay(int month, int dayOfMonth) { |
| this.month = month; |
| this.day = dayOfMonth; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if the specified field is supported. |
| * <p> |
| * This checks if this month-day can be queried for the specified field. |
| * If false, then calling the {@link #range(TemporalField) range} and |
| * {@link #get(TemporalField) get} methods will throw an exception. |
| * <p> |
| * If the field is a {@link ChronoField} then the query is implemented here. |
| * The supported fields are: |
| * <ul> |
| * <li>{@code MONTH_OF_YEAR} |
| * <li>{@code YEAR} |
| * </ul> |
| * All other {@code ChronoField} instances will return false. |
| * <p> |
| * If the field is not a {@code ChronoField}, then the result of this method |
| * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)} |
| * passing {@code this} as the argument. |
| * Whether the field is supported is determined by the field. |
| * |
| * @param field the field to check, null returns false |
| * @return true if the field is supported on this month-day, false if not |
| */ |
| @Override |
| public boolean isSupported(TemporalField field) { |
| if (field instanceof ChronoField) { |
| return field == MONTH_OF_YEAR || field == DAY_OF_MONTH; |
| } |
| return field != null && field.isSupportedBy(this); |
| } |
| |
| /** |
| * Gets the range of valid values for the specified field. |
| * <p> |
| * The range object expresses the minimum and maximum valid values for a field. |
| * This month-day is used to enhance the accuracy of the returned range. |
| * If it is not possible to return the range, because the field is not supported |
| * or for some other reason, an exception is thrown. |
| * <p> |
| * If the field is a {@link ChronoField} then the query is implemented here. |
| * The {@link #isSupported(TemporalField) supported fields} will return |
| * appropriate range instances. |
| * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. |
| * <p> |
| * If the field is not a {@code ChronoField}, then the result of this method |
| * is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)} |
| * passing {@code this} as the argument. |
| * Whether the range can be obtained is determined by the field. |
| * |
| * @param field the field to query the range for, not null |
| * @return the range of valid values for the field, not null |
| * @throws DateTimeException if the range for the field cannot be obtained |
| * @throws UnsupportedTemporalTypeException if the field is not supported |
| */ |
| @Override |
| public ValueRange range(TemporalField field) { |
| if (field == MONTH_OF_YEAR) { |
| return field.range(); |
| } else if (field == DAY_OF_MONTH) { |
| return ValueRange.of(1, getMonth().minLength(), getMonth().maxLength()); |
| } |
| return TemporalAccessor.super.range(field); |
| } |
| |
| /** |
| * Gets the value of the specified field from this month-day as an {@code int}. |
| * <p> |
| * This queries this month-day for the value of the specified field. |
| * The returned value will always be within the valid range of values for the field. |
| * If it is not possible to return the value, because the field is not supported |
| * or for some other reason, an exception is thrown. |
| * <p> |
| * If the field is a {@link ChronoField} then the query is implemented here. |
| * The {@link #isSupported(TemporalField) supported fields} will return valid |
| * values based on this month-day. |
| * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. |
| * <p> |
| * If the field is not a {@code ChronoField}, then the result of this method |
| * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} |
| * passing {@code this} as the argument. Whether the value can be obtained, |
| * and what the value represents, is determined by the field. |
| * |
| * @param field the field to get, not null |
| * @return the value for the field |
| * @throws DateTimeException if a value for the field cannot be obtained or |
| * the value is outside the range of valid values for the field |
| * @throws UnsupportedTemporalTypeException if the field is not supported or |
| * the range of values exceeds an {@code int} |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| @Override // override for Javadoc |
| public int get(TemporalField field) { |
| return range(field).checkValidIntValue(getLong(field), field); |
| } |
| |
| /** |
| * Gets the value of the specified field from this month-day as a {@code long}. |
| * <p> |
| * This queries this month-day for the value of the specified field. |
| * If it is not possible to return the value, because the field is not supported |
| * or for some other reason, an exception is thrown. |
| * <p> |
| * If the field is a {@link ChronoField} then the query is implemented here. |
| * The {@link #isSupported(TemporalField) supported fields} will return valid |
| * values based on this month-day. |
| * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. |
| * <p> |
| * If the field is not a {@code ChronoField}, then the result of this method |
| * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} |
| * passing {@code this} as the argument. Whether the value can be obtained, |
| * and what the value represents, is determined by the field. |
| * |
| * @param field the field to get, not null |
| * @return the value for the field |
| * @throws DateTimeException if a value for the field cannot be obtained |
| * @throws UnsupportedTemporalTypeException if the field is not supported |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| @Override |
| public long getLong(TemporalField field) { |
| if (field instanceof ChronoField) { |
| switch ((ChronoField) field) { |
| // alignedDOW and alignedWOM not supported because they cannot be set in with() |
| case DAY_OF_MONTH: return day; |
| case MONTH_OF_YEAR: return month; |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| } |
| return field.getFrom(this); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the month-of-year field from 1 to 12. |
| * <p> |
| * This method returns the month as an {@code int} from 1 to 12. |
| * Application code is frequently clearer if the enum {@link Month} |
| * is used by calling {@link #getMonth()}. |
| * |
| * @return the month-of-year, from 1 to 12 |
| * @see #getMonth() |
| */ |
| public int getMonthValue() { |
| return month; |
| } |
| |
| /** |
| * Gets the month-of-year field using the {@code Month} enum. |
| * <p> |
| * This method returns the enum {@link Month} for the month. |
| * This avoids confusion as to what {@code int} values mean. |
| * If you need access to the primitive {@code int} value then the enum |
| * provides the {@link Month#getValue() int value}. |
| * |
| * @return the month-of-year, not null |
| * @see #getMonthValue() |
| */ |
| public Month getMonth() { |
| return Month.of(month); |
| } |
| |
| /** |
| * Gets the day-of-month field. |
| * <p> |
| * This method returns the primitive {@code int} value for the day-of-month. |
| * |
| * @return the day-of-month, from 1 to 31 |
| */ |
| public int getDayOfMonth() { |
| return day; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if the year is valid for this month-day. |
| * <p> |
| * This method checks whether this month and day and the input year form |
| * a valid date. This can only return false for February 29th. |
| * |
| * @param year the year to validate |
| * @return true if the year is valid for this month-day |
| * @see Year#isValidMonthDay(MonthDay) |
| */ |
| public boolean isValidYear(int year) { |
| return (day == 29 && month == 2 && Year.isLeap(year) == false) == false; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this {@code MonthDay} with the month-of-year altered. |
| * <p> |
| * This returns a month-day with the specified month. |
| * If the day-of-month is invalid for the specified month, the day will |
| * be adjusted to the last valid day-of-month. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param month the month-of-year to set in the returned month-day, from 1 (January) to 12 (December) |
| * @return a {@code MonthDay} based on this month-day with the requested month, not null |
| * @throws DateTimeException if the month-of-year value is invalid |
| */ |
| public MonthDay withMonth(int month) { |
| return with(Month.of(month)); |
| } |
| |
| /** |
| * Returns a copy of this {@code MonthDay} with the month-of-year altered. |
| * <p> |
| * This returns a month-day with the specified month. |
| * If the day-of-month is invalid for the specified month, the day will |
| * be adjusted to the last valid day-of-month. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param month the month-of-year to set in the returned month-day, not null |
| * @return a {@code MonthDay} based on this month-day with the requested month, not null |
| */ |
| public MonthDay with(Month month) { |
| Objects.requireNonNull(month, "month"); |
| if (month.getValue() == this.month) { |
| return this; |
| } |
| int day = Math.min(this.day, month.maxLength()); |
| return new MonthDay(month.getValue(), day); |
| } |
| |
| /** |
| * Returns a copy of this {@code MonthDay} with the day-of-month altered. |
| * <p> |
| * This returns a month-day with the specified day-of-month. |
| * If the day-of-month is invalid for the month, an exception is thrown. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param dayOfMonth the day-of-month to set in the return month-day, from 1 to 31 |
| * @return a {@code MonthDay} based on this month-day with the requested day, not null |
| * @throws DateTimeException if the day-of-month value is invalid, |
| * or if the day-of-month is invalid for the month |
| */ |
| public MonthDay withDayOfMonth(int dayOfMonth) { |
| if (dayOfMonth == this.day) { |
| return this; |
| } |
| return of(month, dayOfMonth); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Queries this month-day using the specified query. |
| * <p> |
| * This queries this month-day using the specified query strategy object. |
| * The {@code TemporalQuery} object defines the logic to be used to |
| * obtain the result. Read the documentation of the query to understand |
| * what the result of this method will be. |
| * <p> |
| * The result of this method is obtained by invoking the |
| * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the |
| * specified query passing {@code this} as the argument. |
| * |
| * @param <R> the type of the result |
| * @param query the query to invoke, not null |
| * @return the query result, null may be returned (defined by the query) |
| * @throws DateTimeException if unable to query (defined by the query) |
| * @throws ArithmeticException if numeric overflow occurs (defined by the query) |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| public <R> R query(TemporalQuery<R> query) { |
| if (query == TemporalQueries.chronology()) { |
| return (R) IsoChronology.INSTANCE; |
| } |
| return TemporalAccessor.super.query(query); |
| } |
| |
| /** |
| * Adjusts the specified temporal object to have this month-day. |
| * <p> |
| * This returns a temporal object of the same observable type as the input |
| * with the month and day-of-month changed to be the same as this. |
| * <p> |
| * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)} |
| * twice, passing {@link ChronoField#MONTH_OF_YEAR} and |
| * {@link ChronoField#DAY_OF_MONTH} as the fields. |
| * If the specified temporal object does not use the ISO calendar system then |
| * a {@code DateTimeException} is thrown. |
| * <p> |
| * In most cases, it is clearer to reverse the calling pattern by using |
| * {@link Temporal#with(TemporalAdjuster)}: |
| * <pre> |
| * // these two lines are equivalent, but the second approach is recommended |
| * temporal = thisMonthDay.adjustInto(temporal); |
| * temporal = temporal.with(thisMonthDay); |
| * </pre> |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param temporal the target object to be adjusted, not null |
| * @return the adjusted object, not null |
| * @throws DateTimeException if unable to make the adjustment |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| @Override |
| public Temporal adjustInto(Temporal temporal) { |
| if (Chronology.from(temporal).equals(IsoChronology.INSTANCE) == false) { |
| throw new DateTimeException("Adjustment only supported on ISO date-time"); |
| } |
| temporal = temporal.with(MONTH_OF_YEAR, month); |
| return temporal.with(DAY_OF_MONTH, Math.min(temporal.range(DAY_OF_MONTH).getMaximum(), day)); |
| } |
| |
| /** |
| * Formats this month-day using the specified formatter. |
| * <p> |
| * This month-day will be passed to the formatter to produce a string. |
| * |
| * @param formatter the formatter to use, not null |
| * @return the formatted month-day string, not null |
| * @throws DateTimeException if an error occurs during printing |
| */ |
| public String format(DateTimeFormatter formatter) { |
| Objects.requireNonNull(formatter, "formatter"); |
| return formatter.format(this); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Combines this month-day with a year to create a {@code LocalDate}. |
| * <p> |
| * This returns a {@code LocalDate} formed from this month-day and the specified year. |
| * <p> |
| * A month-day of February 29th will be adjusted to February 28th in the resulting |
| * date if the year is not a leap year. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param year the year to use, from MIN_YEAR to MAX_YEAR |
| * @return the local date formed from this month-day and the specified year, not null |
| * @throws DateTimeException if the year is outside the valid range of years |
| */ |
| public LocalDate atYear(int year) { |
| return LocalDate.of(year, month, isValidYear(year) ? day : 28); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Compares this month-day to another month-day. |
| * <p> |
| * The comparison is based first on value of the month, then on the value of the day. |
| * It is "consistent with equals", as defined by {@link Comparable}. |
| * |
| * @param other the other month-day to compare to, not null |
| * @return the comparator value, negative if less, positive if greater |
| */ |
| @Override |
| public int compareTo(MonthDay other) { |
| int cmp = (month - other.month); |
| if (cmp == 0) { |
| cmp = (day - other.day); |
| } |
| return cmp; |
| } |
| |
| /** |
| * Checks if this month-day is after the specified month-day. |
| * |
| * @param other the other month-day to compare to, not null |
| * @return true if this is after the specified month-day |
| */ |
| public boolean isAfter(MonthDay other) { |
| return compareTo(other) > 0; |
| } |
| |
| /** |
| * Checks if this month-day is before the specified month-day. |
| * |
| * @param other the other month-day to compare to, not null |
| * @return true if this point is before the specified month-day |
| */ |
| public boolean isBefore(MonthDay other) { |
| return compareTo(other) < 0; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if this month-day is equal to another month-day. |
| * <p> |
| * The comparison is based on the time-line position of the month-day within a year. |
| * |
| * @param obj the object to check, null returns false |
| * @return true if this is equal to the other month-day |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof MonthDay) { |
| MonthDay other = (MonthDay) obj; |
| return month == other.month && day == other.day; |
| } |
| return false; |
| } |
| |
| /** |
| * A hash code for this month-day. |
| * |
| * @return a suitable hash code |
| */ |
| @Override |
| public int hashCode() { |
| return (month << 6) + day; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Outputs this month-day as a {@code String}, such as {@code --12-03}. |
| * <p> |
| * The output will be in the format {@code --MM-dd}: |
| * |
| * @return a string representation of this month-day, not null |
| */ |
| @Override |
| public String toString() { |
| return new StringBuilder(10).append("--") |
| .append(month < 10 ? "0" : "").append(month) |
| .append(day < 10 ? "-0" : "-").append(day) |
| .toString(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Writes the object using a |
| * <a href="../../serialized-form.html#java.time.Ser">dedicated serialized form</a>. |
| * @serialData |
| * <pre> |
| * out.writeByte(13); // identifies a MonthDay |
| * out.writeByte(month); |
| * out.writeByte(day); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| private Object writeReplace() { |
| return new Ser(Ser.MONTH_DAY_TYPE, this); |
| } |
| |
| /** |
| * Defend against malicious streams. |
| * |
| * @param s the stream to read |
| * @throws InvalidObjectException always |
| */ |
| private void readObject(ObjectInputStream s) throws InvalidObjectException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| |
| void writeExternal(DataOutput out) throws IOException { |
| out.writeByte(month); |
| out.writeByte(day); |
| } |
| |
| static MonthDay readExternal(DataInput in) throws IOException { |
| byte month = in.readByte(); |
| byte day = in.readByte(); |
| return MonthDay.of(month, day); |
| } |
| |
| } |
