--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/time/chrono/ChronoPeriodImpl.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,401 @@
+/*
+ * 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.ObjectInputStream;
+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.
+ *
+ * @param s the stream to read
+ * @throws InvalidObjectException always
+ */
+ private void readObject(ObjectInputStream s) 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);
+ }
+
+}