| /* |
| * Copyright (c) 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. |
| */ |
| |
| /* |
| * Copyright (c) 2013, 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.MONTH_OF_YEAR; |
| import static java.time.temporal.ChronoUnit.DAYS; |
| import static java.time.temporal.ChronoUnit.MONTHS; |
| import static java.time.temporal.ChronoUnit.YEARS; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectStreamException; |
| import java.io.Serializable; |
| import java.time.DateTimeException; |
| import java.time.temporal.ChronoUnit; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalAccessor; |
| import java.time.temporal.TemporalAmount; |
| import java.time.temporal.TemporalQueries; |
| import java.time.temporal.TemporalUnit; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.time.temporal.ValueRange; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * A period 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. |
| * |
| * @implSpec |
| * This class is immutable nad thread-safe. |
| * |
| * @since 1.8 |
| */ |
| final class ChronoPeriodImpl |
| implements ChronoPeriod, Serializable { |
| // this class is only used by JDK chronology implementations and makes assumptions based on that fact |
| |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = 57387258289L; |
| |
| /** |
| * The set of supported units. |
| */ |
| private static final List<TemporalUnit> SUPPORTED_UNITS = |
| Collections.unmodifiableList(Arrays.<TemporalUnit>asList(YEARS, MONTHS, DAYS)); |
| |
| /** |
| * The chronology. |
| */ |
| private final Chronology chrono; |
| /** |
| * The number of years. |
| */ |
| final int years; |
| /** |
| * The number of months. |
| */ |
| final int months; |
| /** |
| * The number of days. |
| */ |
| final int days; |
| |
| /** |
| * Creates an instance. |
| */ |
| ChronoPeriodImpl(Chronology chrono, int years, int months, int days) { |
| Objects.requireNonNull(chrono, "chrono"); |
| this.chrono = chrono; |
| this.years = years; |
| this.months = months; |
| this.days = days; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public long get(TemporalUnit unit) { |
| if (unit == ChronoUnit.YEARS) { |
| return years; |
| } else if (unit == ChronoUnit.MONTHS) { |
| return months; |
| } else if (unit == ChronoUnit.DAYS) { |
| return days; |
| } else { |
| throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
| } |
| } |
| |
| @Override |
| public List<TemporalUnit> getUnits() { |
| return ChronoPeriodImpl.SUPPORTED_UNITS; |
| } |
| |
| @Override |
| public Chronology getChronology() { |
| return chrono; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public boolean isZero() { |
| return years == 0 && months == 0 && days == 0; |
| } |
| |
| @Override |
| public boolean isNegative() { |
| return years < 0 || months < 0 || days < 0; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoPeriod plus(TemporalAmount amountToAdd) { |
| ChronoPeriodImpl amount = validateAmount(amountToAdd); |
| return new ChronoPeriodImpl( |
| chrono, |
| Math.addExact(years, amount.years), |
| Math.addExact(months, amount.months), |
| Math.addExact(days, amount.days)); |
| } |
| |
| @Override |
| public ChronoPeriod minus(TemporalAmount amountToSubtract) { |
| ChronoPeriodImpl amount = validateAmount(amountToSubtract); |
| return new ChronoPeriodImpl( |
| chrono, |
| Math.subtractExact(years, amount.years), |
| Math.subtractExact(months, amount.months), |
| Math.subtractExact(days, amount.days)); |
| } |
| |
| /** |
| * Obtains an instance of {@code ChronoPeriodImpl} from a temporal amount. |
| * |
| * @param amount the temporal amount to convert, not null |
| * @return the period, not null |
| */ |
| private ChronoPeriodImpl validateAmount(TemporalAmount amount) { |
| Objects.requireNonNull(amount, "amount"); |
| if (amount instanceof ChronoPeriodImpl == false) { |
| throw new DateTimeException("Unable to obtain ChronoPeriod from TemporalAmount: " + amount.getClass()); |
| } |
| ChronoPeriodImpl period = (ChronoPeriodImpl) amount; |
| if (chrono.equals(period.getChronology()) == false) { |
| throw new ClassCastException("Chronology mismatch, expected: " + chrono.getId() + ", actual: " + period.getChronology().getId()); |
| } |
| return period; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoPeriod multipliedBy(int scalar) { |
| if (this.isZero() || scalar == 1) { |
| return this; |
| } |
| return new ChronoPeriodImpl( |
| chrono, |
| Math.multiplyExact(years, scalar), |
| Math.multiplyExact(months, scalar), |
| Math.multiplyExact(days, scalar)); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoPeriod normalized() { |
| long monthRange = monthRange(); |
| if (monthRange > 0) { |
| long totalMonths = years * monthRange + months; |
| long splitYears = totalMonths / monthRange; |
| int splitMonths = (int) (totalMonths % monthRange); // no overflow |
| if (splitYears == years && splitMonths == months) { |
| return this; |
| } |
| return new ChronoPeriodImpl(chrono, Math.toIntExact(splitYears), splitMonths, days); |
| |
| } |
| return this; |
| } |
| |
| /** |
| * Calculates the range of months. |
| * |
| * @return the month range, -1 if not fixed range |
| */ |
| private long monthRange() { |
| ValueRange startRange = chrono.range(MONTH_OF_YEAR); |
| if (startRange.isFixed() && startRange.isIntValue()) { |
| return startRange.getMaximum() - startRange.getMinimum() + 1; |
| } |
| return -1; |
| } |
| |
| //------------------------------------------------------------------------- |
| @Override |
| public Temporal addTo(Temporal temporal) { |
| validateChrono(temporal); |
| if (months == 0) { |
| if (years != 0) { |
| temporal = temporal.plus(years, YEARS); |
| } |
| } else { |
| long monthRange = monthRange(); |
| if (monthRange > 0) { |
| temporal = temporal.plus(years * monthRange + months, MONTHS); |
| } else { |
| if (years != 0) { |
| temporal = temporal.plus(years, YEARS); |
| } |
| temporal = temporal.plus(months, MONTHS); |
| } |
| } |
| if (days != 0) { |
| temporal = temporal.plus(days, DAYS); |
| } |
| return temporal; |
| } |
| |
| |
| |
| @Override |
| public Temporal subtractFrom(Temporal temporal) { |
| validateChrono(temporal); |
| if (months == 0) { |
| if (years != 0) { |
| temporal = temporal.minus(years, YEARS); |
| } |
| } else { |
| long monthRange = monthRange(); |
| if (monthRange > 0) { |
| temporal = temporal.minus(years * monthRange + months, MONTHS); |
| } else { |
| if (years != 0) { |
| temporal = temporal.minus(years, YEARS); |
| } |
| temporal = temporal.minus(months, MONTHS); |
| } |
| } |
| if (days != 0) { |
| temporal = temporal.minus(days, DAYS); |
| } |
| return temporal; |
| } |
| |
| /** |
| * Validates that the temporal has the correct chronology. |
| */ |
| private void validateChrono(TemporalAccessor temporal) { |
| Objects.requireNonNull(temporal, "temporal"); |
| Chronology temporalChrono = temporal.query(TemporalQueries.chronology()); |
| if (temporalChrono != null && chrono.equals(temporalChrono) == false) { |
| throw new DateTimeException("Chronology mismatch, expected: " + chrono.getId() + ", actual: " + temporalChrono.getId()); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof ChronoPeriodImpl) { |
| ChronoPeriodImpl other = (ChronoPeriodImpl) obj; |
| return years == other.years && months == other.months && |
| days == other.days && chrono.equals(other.chrono); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (years + Integer.rotateLeft(months, 8) + Integer.rotateLeft(days, 16)) ^ chrono.hashCode(); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public String toString() { |
| if (isZero()) { |
| return getChronology().toString() + " P0D"; |
| } else { |
| StringBuilder buf = new StringBuilder(); |
| buf.append(getChronology().toString()).append(' ').append('P'); |
| if (years != 0) { |
| buf.append(years).append('Y'); |
| } |
| if (months != 0) { |
| buf.append(months).append('M'); |
| } |
| if (days != 0) { |
| buf.append(days).append('D'); |
| } |
| return buf.toString(); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Writes the Chronology using a |
| * <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>. |
| * <pre> |
| * out.writeByte(12); // identifies this as a ChronoPeriodImpl |
| * out.writeUTF(getId()); // the chronology |
| * out.writeInt(years); |
| * out.writeInt(months); |
| * out.writeInt(days); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| protected Object writeReplace() { |
| return new Ser(Ser.CHRONO_PERIOD_TYPE, this); |
| } |
| |
| /** |
| * Defend against malicious streams. |
| * @return never |
| * @throws InvalidObjectException always |
| */ |
| private Object readResolve() throws ObjectStreamException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| |
| void writeExternal(DataOutput out) throws IOException { |
| out.writeUTF(chrono.getId()); |
| out.writeInt(years); |
| out.writeInt(months); |
| out.writeInt(days); |
| } |
| |
| static ChronoPeriodImpl readExternal(DataInput in) throws IOException { |
| Chronology chrono = Chronology.of(in.readUTF()); |
| int years = in.readInt(); |
| int months = in.readInt(); |
| int days = in.readInt(); |
| return new ChronoPeriodImpl(chrono, years, months, days); |
| } |
| |
| } |
