| /* |
| * 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. |
| */ |
| |
| /* |
| * Copyright (c) 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.chrono; |
| |
| import static java.time.temporal.ChronoField.DAY_OF_MONTH; |
| import static java.time.temporal.ChronoField.ERA; |
| import static java.time.temporal.ChronoField.MONTH_OF_YEAR; |
| import static java.time.temporal.ChronoField.PROLEPTIC_MONTH; |
| import static java.time.temporal.ChronoField.YEAR_OF_ERA; |
| |
| import java.io.Serializable; |
| import java.time.DateTimeException; |
| import java.time.temporal.ChronoUnit; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalAdjuster; |
| import java.time.temporal.TemporalAmount; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.TemporalUnit; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.time.temporal.ValueRange; |
| import java.util.Objects; |
| |
| /** |
| * A date expressed in terms of a standard year-month-day calendar system. |
| * <p> |
| * This class is used by applications seeking to handle dates in non-ISO calendar systems. |
| * For example, the Japanese, Minguo, Thai Buddhist and others. |
| * <p> |
| * {@code ChronoLocalDate} is built on the generic concepts of year, month and day. |
| * The calendar system, represented by a {@link java.time.chrono.Chronology}, expresses the relationship between |
| * the fields and this class allows the resulting date to be manipulated. |
| * <p> |
| * Note that not all calendar systems are suitable for use with this class. |
| * For example, the Mayan calendar uses a system that bears no relation to years, months and days. |
| * <p> |
| * The API design encourages the use of {@code LocalDate} for the majority of the application. |
| * This includes code to read and write from a persistent data store, such as a database, |
| * and to send dates and times across a network. The {@code ChronoLocalDate} instance is then used |
| * at the user interface level to deal with localized input/output. |
| * |
| * <P>Example: </p> |
| * <pre> |
| * System.out.printf("Example()%n"); |
| * // Enumerate the list of available calendars and print today for each |
| * Set<Chronology> chronos = Chronology.getAvailableChronologies(); |
| * for (Chronology chrono : chronos) { |
| * ChronoLocalDate date = chrono.dateNow(); |
| * System.out.printf(" %20s: %s%n", chrono.getID(), date.toString()); |
| * } |
| * |
| * // Print the Hijrah date and calendar |
| * ChronoLocalDate date = Chronology.of("Hijrah").dateNow(); |
| * int day = date.get(ChronoField.DAY_OF_MONTH); |
| * int dow = date.get(ChronoField.DAY_OF_WEEK); |
| * int month = date.get(ChronoField.MONTH_OF_YEAR); |
| * int year = date.get(ChronoField.YEAR); |
| * System.out.printf(" Today is %s %s %d-%s-%d%n", date.getChronology().getID(), |
| * dow, day, month, year); |
| |
| * // Print today's date and the last day of the year |
| * ChronoLocalDate now1 = Chronology.of("Hijrah").dateNow(); |
| * ChronoLocalDate first = now1.with(ChronoField.DAY_OF_MONTH, 1) |
| * .with(ChronoField.MONTH_OF_YEAR, 1); |
| * ChronoLocalDate last = first.plus(1, ChronoUnit.YEARS) |
| * .minus(1, ChronoUnit.DAYS); |
| * System.out.printf(" Today is %s: start: %s; end: %s%n", last.getChronology().getID(), |
| * first, last); |
| * </pre> |
| * |
| * <h3>Adding Calendars</h3> |
| * <p> The set of calendars is extensible by defining a subclass of {@link ChronoLocalDate} |
| * to represent a date instance and an implementation of {@code Chronology} |
| * to be the factory for the ChronoLocalDate subclass. |
| * </p> |
| * <p> To permit the discovery of the additional calendar types the implementation of |
| * {@code Chronology} must be registered as a Service implementing the {@code Chronology} interface |
| * in the {@code META-INF/Services} file as per the specification of {@link java.util.ServiceLoader}. |
| * The subclass must function according to the {@code Chronology} class description and must provide its |
| * {@link java.time.chrono.Chronology#getId() chronlogy ID} and {@link Chronology#getCalendarType() calendar type}. </p> |
| * |
| * @implSpec |
| * This abstract class must be implemented with care to ensure other classes operate correctly. |
| * All implementations that can be instantiated must be final, immutable and thread-safe. |
| * Subclasses should be Serializable wherever possible. |
| * |
| * @param <D> the ChronoLocalDate of this date-time |
| * @since 1.8 |
| */ |
| abstract class ChronoLocalDateImpl<D extends ChronoLocalDate> |
| implements ChronoLocalDate, Temporal, TemporalAdjuster, Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = 6282433883239719096L; |
| |
| /** |
| * Casts the {@code Temporal} to {@code ChronoLocalDate} ensuring it bas the specified chronology. |
| * |
| * @param chrono the chronology to check for, not null |
| * @param temporal a date-time to cast, not null |
| * @return the date-time checked and cast to {@code ChronoLocalDate}, not null |
| * @throws ClassCastException if the date-time cannot be cast to ChronoLocalDate |
| * or the chronology is not equal this Chronology |
| */ |
| static <D extends ChronoLocalDate> D ensureValid(Chronology chrono, Temporal temporal) { |
| @SuppressWarnings("unchecked") |
| D other = (D) temporal; |
| if (chrono.equals(other.getChronology()) == false) { |
| throw new ClassCastException("Chronology mismatch, expected: " + chrono.getId() + ", actual: " + other.getChronology().getId()); |
| } |
| return other; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Creates an instance. |
| */ |
| ChronoLocalDateImpl() { |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public D with(TemporalAdjuster adjuster) { |
| return (D) ChronoLocalDate.super.with(adjuster); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public D with(TemporalField field, long value) { |
| return (D) ChronoLocalDate.super.with(field, value); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| @SuppressWarnings("unchecked") |
| public D plus(TemporalAmount amount) { |
| return (D) ChronoLocalDate.super.plus(amount); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| @SuppressWarnings("unchecked") |
| public D plus(long amountToAdd, TemporalUnit unit) { |
| if (unit instanceof ChronoUnit) { |
| ChronoUnit f = (ChronoUnit) unit; |
| switch (f) { |
| case DAYS: return plusDays(amountToAdd); |
| case WEEKS: return plusDays(Math.multiplyExact(amountToAdd, 7)); |
| case MONTHS: return plusMonths(amountToAdd); |
| case YEARS: return plusYears(amountToAdd); |
| case DECADES: return plusYears(Math.multiplyExact(amountToAdd, 10)); |
| case CENTURIES: return plusYears(Math.multiplyExact(amountToAdd, 100)); |
| case MILLENNIA: return plusYears(Math.multiplyExact(amountToAdd, 1000)); |
| case ERAS: return with(ERA, Math.addExact(getLong(ERA), amountToAdd)); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
| } |
| return (D) ChronoLocalDate.super.plus(amountToAdd, unit); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public D minus(TemporalAmount amount) { |
| return (D) ChronoLocalDate.super.minus(amount); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public D minus(long amountToSubtract, TemporalUnit unit) { |
| return (D) ChronoLocalDate.super.minus(amountToSubtract, unit); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this date with the specified number of years added. |
| * <p> |
| * This adds the specified period in years to the date. |
| * In some cases, adding years can cause the resulting date to become invalid. |
| * If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure |
| * that the result is valid. Typically this will select the last valid day of the month. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param yearsToAdd the years to add, may be negative |
| * @return a date based on this one with the years added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| abstract D plusYears(long yearsToAdd); |
| |
| /** |
| * Returns a copy of this date with the specified number of months added. |
| * <p> |
| * This adds the specified period in months to the date. |
| * In some cases, adding months can cause the resulting date to become invalid. |
| * If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure |
| * that the result is valid. Typically this will select the last valid day of the month. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param monthsToAdd the months to add, may be negative |
| * @return a date based on this one with the months added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| abstract D plusMonths(long monthsToAdd); |
| |
| /** |
| * Returns a copy of this date with the specified number of weeks added. |
| * <p> |
| * This adds the specified period in weeks to the date. |
| * In some cases, adding weeks can cause the resulting date to become invalid. |
| * If this occurs, then other fields will be adjusted to ensure that the result is valid. |
| * <p> |
| * The default implementation uses {@link #plusDays(long)} using a 7 day week. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param weeksToAdd the weeks to add, may be negative |
| * @return a date based on this one with the weeks added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| D plusWeeks(long weeksToAdd) { |
| return plusDays(Math.multiplyExact(weeksToAdd, 7)); |
| } |
| |
| /** |
| * Returns a copy of this date with the specified number of days added. |
| * <p> |
| * This adds the specified period in days to the date. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param daysToAdd the days to add, may be negative |
| * @return a date based on this one with the days added, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| abstract D plusDays(long daysToAdd); |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this date with the specified number of years subtracted. |
| * <p> |
| * This subtracts the specified period in years to the date. |
| * In some cases, subtracting years can cause the resulting date to become invalid. |
| * If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure |
| * that the result is valid. Typically this will select the last valid day of the month. |
| * <p> |
| * The default implementation uses {@link #plusYears(long)}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param yearsToSubtract the years to subtract, may be negative |
| * @return a date based on this one with the years subtracted, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| @SuppressWarnings("unchecked") |
| D minusYears(long yearsToSubtract) { |
| return (yearsToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusYears(Long.MAX_VALUE)).plusYears(1) : plusYears(-yearsToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this date with the specified number of months subtracted. |
| * <p> |
| * This subtracts the specified period in months to the date. |
| * In some cases, subtracting months can cause the resulting date to become invalid. |
| * If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure |
| * that the result is valid. Typically this will select the last valid day of the month. |
| * <p> |
| * The default implementation uses {@link #plusMonths(long)}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param monthsToSubtract the months to subtract, may be negative |
| * @return a date based on this one with the months subtracted, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| @SuppressWarnings("unchecked") |
| D minusMonths(long monthsToSubtract) { |
| return (monthsToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusMonths(Long.MAX_VALUE)).plusMonths(1) : plusMonths(-monthsToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this date with the specified number of weeks subtracted. |
| * <p> |
| * This subtracts the specified period in weeks to the date. |
| * In some cases, subtracting weeks can cause the resulting date to become invalid. |
| * If this occurs, then other fields will be adjusted to ensure that the result is valid. |
| * <p> |
| * The default implementation uses {@link #plusWeeks(long)}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param weeksToSubtract the weeks to subtract, may be negative |
| * @return a date based on this one with the weeks subtracted, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| @SuppressWarnings("unchecked") |
| D minusWeeks(long weeksToSubtract) { |
| return (weeksToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusWeeks(Long.MAX_VALUE)).plusWeeks(1) : plusWeeks(-weeksToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this date with the specified number of days subtracted. |
| * <p> |
| * This subtracts the specified period in days to the date. |
| * <p> |
| * The default implementation uses {@link #plusDays(long)}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param daysToSubtract the days to subtract, may be negative |
| * @return a date based on this one with the days subtracted, not null |
| * @throws DateTimeException if the result exceeds the supported date range |
| */ |
| @SuppressWarnings("unchecked") |
| D minusDays(long daysToSubtract) { |
| return (daysToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusDays(Long.MAX_VALUE)).plusDays(1) : plusDays(-daysToSubtract)); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public long until(Temporal endExclusive, TemporalUnit unit) { |
| Objects.requireNonNull(endExclusive, "endExclusive"); |
| ChronoLocalDate end = getChronology().date(endExclusive); |
| if (unit instanceof ChronoUnit) { |
| switch ((ChronoUnit) unit) { |
| case DAYS: return daysUntil(end); |
| case WEEKS: return daysUntil(end) / 7; |
| case MONTHS: return monthsUntil(end); |
| case YEARS: return monthsUntil(end) / 12; |
| case DECADES: return monthsUntil(end) / 120; |
| case CENTURIES: return monthsUntil(end) / 1200; |
| case MILLENNIA: return monthsUntil(end) / 12000; |
| case ERAS: return end.getLong(ERA) - getLong(ERA); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
| } |
| Objects.requireNonNull(unit, "unit"); |
| return unit.between(this, end); |
| } |
| |
| private long daysUntil(ChronoLocalDate end) { |
| return end.toEpochDay() - toEpochDay(); // no overflow |
| } |
| |
| private long monthsUntil(ChronoLocalDate end) { |
| ValueRange range = getChronology().range(MONTH_OF_YEAR); |
| if (range.getMaximum() != 12) { |
| throw new IllegalStateException("ChronoLocalDateImpl only supports Chronologies with 12 months per year"); |
| } |
| long packed1 = getLong(PROLEPTIC_MONTH) * 32L + get(DAY_OF_MONTH); // no overflow |
| long packed2 = end.getLong(PROLEPTIC_MONTH) * 32L + end.get(DAY_OF_MONTH); // no overflow |
| return (packed2 - packed1) / 32; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof ChronoLocalDate) { |
| return compareTo((ChronoLocalDate) obj) == 0; |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| long epDay = toEpochDay(); |
| return getChronology().hashCode() ^ ((int) (epDay ^ (epDay >>> 32))); |
| } |
| |
| @Override |
| public String toString() { |
| // getLong() reduces chances of exceptions in toString() |
| long yoe = getLong(YEAR_OF_ERA); |
| long moy = getLong(MONTH_OF_YEAR); |
| long dom = getLong(DAY_OF_MONTH); |
| StringBuilder buf = new StringBuilder(30); |
| buf.append(getChronology().toString()) |
| .append(" ") |
| .append(getEra()) |
| .append(" ") |
| .append(yoe) |
| .append(moy < 10 ? "-0" : "-").append(moy) |
| .append(dom < 10 ? "-0" : "-").append(dom); |
| return buf.toString(); |
| } |
| |
| } |
