| /* |
| * Copyright (c) 2012, 2019, 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.chrono; |
| |
| import static java.time.temporal.ChronoUnit.SECONDS; |
| |
| import java.io.IOException; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectInput; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutput; |
| import java.io.Serializable; |
| import java.time.Instant; |
| import java.time.LocalDateTime; |
| import java.time.ZoneId; |
| import java.time.ZoneOffset; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.ChronoUnit; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.TemporalUnit; |
| import java.time.zone.ZoneOffsetTransition; |
| import java.time.zone.ZoneRules; |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * A date-time with a time-zone in the calendar neutral API. |
| * <p> |
| * {@code ZoneChronoDateTime} is an immutable representation of a date-time with a time-zone. |
| * This class stores all date and time fields, to a precision of nanoseconds, |
| * as well as a time-zone and zone offset. |
| * <p> |
| * The purpose of storing the time-zone is to distinguish the ambiguous case where |
| * the local time-line overlaps, typically as a result of the end of daylight time. |
| * Information about the local-time can be obtained using methods on the time-zone. |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @serial Document the delegation of this class in the serialized-form specification. |
| * @param <D> the concrete type for the date of this date-time |
| * @since 1.8 |
| */ |
| final class ChronoZonedDateTimeImpl<D extends ChronoLocalDate> |
| implements ChronoZonedDateTime<D>, Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| @java.io.Serial |
| private static final long serialVersionUID = -5261813987200935591L; |
| |
| /** |
| * The local date-time. |
| */ |
| private final transient ChronoLocalDateTimeImpl<D> dateTime; |
| /** |
| * The zone offset. |
| */ |
| private final transient ZoneOffset offset; |
| /** |
| * The zone ID. |
| */ |
| private final transient ZoneId zone; |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance from a local date-time using the preferred offset if possible. |
| * |
| * @param localDateTime the local date-time, not null |
| * @param zone the zone identifier, not null |
| * @param preferredOffset the zone offset, null if no preference |
| * @return the zoned date-time, not null |
| */ |
| static <R extends ChronoLocalDate> ChronoZonedDateTime<R> ofBest( |
| ChronoLocalDateTimeImpl<R> localDateTime, ZoneId zone, ZoneOffset preferredOffset) { |
| Objects.requireNonNull(localDateTime, "localDateTime"); |
| Objects.requireNonNull(zone, "zone"); |
| if (zone instanceof ZoneOffset) { |
| return new ChronoZonedDateTimeImpl<>(localDateTime, (ZoneOffset) zone, zone); |
| } |
| ZoneRules rules = zone.getRules(); |
| LocalDateTime isoLDT = LocalDateTime.from(localDateTime); |
| List<ZoneOffset> validOffsets = rules.getValidOffsets(isoLDT); |
| ZoneOffset offset; |
| if (validOffsets.size() == 1) { |
| offset = validOffsets.get(0); |
| } else if (validOffsets.size() == 0) { |
| ZoneOffsetTransition trans = rules.getTransition(isoLDT); |
| localDateTime = localDateTime.plusSeconds(trans.getDuration().getSeconds()); |
| offset = trans.getOffsetAfter(); |
| } else { |
| if (preferredOffset != null && validOffsets.contains(preferredOffset)) { |
| offset = preferredOffset; |
| } else { |
| offset = validOffsets.get(0); |
| } |
| } |
| Objects.requireNonNull(offset, "offset"); // protect against bad ZoneRules |
| return new ChronoZonedDateTimeImpl<>(localDateTime, offset, zone); |
| } |
| |
| /** |
| * Obtains an instance from an instant using the specified time-zone. |
| * |
| * @param chrono the chronology, not null |
| * @param instant the instant, not null |
| * @param zone the zone identifier, not null |
| * @return the zoned date-time, not null |
| */ |
| static ChronoZonedDateTimeImpl<?> ofInstant(Chronology chrono, Instant instant, ZoneId zone) { |
| ZoneRules rules = zone.getRules(); |
| ZoneOffset offset = rules.getOffset(instant); |
| Objects.requireNonNull(offset, "offset"); // protect against bad ZoneRules |
| LocalDateTime ldt = LocalDateTime.ofEpochSecond(instant.getEpochSecond(), instant.getNano(), offset); |
| ChronoLocalDateTimeImpl<?> cldt = (ChronoLocalDateTimeImpl<?>)chrono.localDateTime(ldt); |
| return new ChronoZonedDateTimeImpl<>(cldt, offset, zone); |
| } |
| |
| /** |
| * Obtains an instance from an {@code Instant}. |
| * |
| * @param instant the instant to create the date-time from, not null |
| * @param zone the time-zone to use, validated not null |
| * @return the zoned date-time, validated not null |
| */ |
| @SuppressWarnings("unchecked") |
| private ChronoZonedDateTimeImpl<D> create(Instant instant, ZoneId zone) { |
| return (ChronoZonedDateTimeImpl<D>)ofInstant(getChronology(), instant, zone); |
| } |
| |
| /** |
| * Casts the {@code Temporal} to {@code ChronoZonedDateTimeImpl} 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 ChronoZonedDateTimeImpl}, not null |
| * @throws ClassCastException if the date-time cannot be cast to ChronoZonedDateTimeImpl |
| * or the chronology is not equal this Chronology |
| */ |
| static <R extends ChronoLocalDate> ChronoZonedDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) { |
| @SuppressWarnings("unchecked") |
| ChronoZonedDateTimeImpl<R> other = (ChronoZonedDateTimeImpl<R>) temporal; |
| if (chrono.equals(other.getChronology()) == false) { |
| throw new ClassCastException("Chronology mismatch, required: " + chrono.getId() |
| + ", actual: " + other.getChronology().getId()); |
| } |
| return other; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Constructor. |
| * |
| * @param dateTime the date-time, not null |
| * @param offset the zone offset, not null |
| * @param zone the zone ID, not null |
| */ |
| private ChronoZonedDateTimeImpl(ChronoLocalDateTimeImpl<D> dateTime, ZoneOffset offset, ZoneId zone) { |
| this.dateTime = Objects.requireNonNull(dateTime, "dateTime"); |
| this.offset = Objects.requireNonNull(offset, "offset"); |
| this.zone = Objects.requireNonNull(zone, "zone"); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ZoneOffset getOffset() { |
| return offset; |
| } |
| |
| @Override |
| public ChronoZonedDateTime<D> withEarlierOffsetAtOverlap() { |
| ZoneOffsetTransition trans = getZone().getRules().getTransition(LocalDateTime.from(this)); |
| if (trans != null && trans.isOverlap()) { |
| ZoneOffset earlierOffset = trans.getOffsetBefore(); |
| if (earlierOffset.equals(offset) == false) { |
| return new ChronoZonedDateTimeImpl<>(dateTime, earlierOffset, zone); |
| } |
| } |
| return this; |
| } |
| |
| @Override |
| public ChronoZonedDateTime<D> withLaterOffsetAtOverlap() { |
| ZoneOffsetTransition trans = getZone().getRules().getTransition(LocalDateTime.from(this)); |
| if (trans != null) { |
| ZoneOffset offset = trans.getOffsetAfter(); |
| if (offset.equals(getOffset()) == false) { |
| return new ChronoZonedDateTimeImpl<>(dateTime, offset, zone); |
| } |
| } |
| return this; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoLocalDateTime<D> toLocalDateTime() { |
| return dateTime; |
| } |
| |
| @Override |
| public ZoneId getZone() { |
| return zone; |
| } |
| |
| @Override |
| public ChronoZonedDateTime<D> withZoneSameLocal(ZoneId zone) { |
| return ofBest(dateTime, zone, offset); |
| } |
| |
| @Override |
| public ChronoZonedDateTime<D> withZoneSameInstant(ZoneId zone) { |
| Objects.requireNonNull(zone, "zone"); |
| return this.zone.equals(zone) ? this : create(dateTime.toInstant(offset), zone); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public boolean isSupported(TemporalField field) { |
| return field instanceof ChronoField || (field != null && field.isSupportedBy(this)); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoZonedDateTime<D> with(TemporalField field, long newValue) { |
| if (field instanceof ChronoField chronoField) { |
| switch (chronoField) { |
| case INSTANT_SECONDS: return plus(newValue - toEpochSecond(), SECONDS); |
| case OFFSET_SECONDS: { |
| ZoneOffset offset = ZoneOffset.ofTotalSeconds(chronoField.checkValidIntValue(newValue)); |
| return create(dateTime.toInstant(offset), zone); |
| } |
| } |
| return ofBest(dateTime.with(field, newValue), zone, offset); |
| } |
| return ChronoZonedDateTimeImpl.ensureValid(getChronology(), field.adjustInto(this, newValue)); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ChronoZonedDateTime<D> plus(long amountToAdd, TemporalUnit unit) { |
| if (unit instanceof ChronoUnit) { |
| return with(dateTime.plus(amountToAdd, unit)); |
| } |
| return ChronoZonedDateTimeImpl.ensureValid(getChronology(), unit.addTo(this, amountToAdd)); /// TODO: Generics replacement Risk! |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public long until(Temporal endExclusive, TemporalUnit unit) { |
| Objects.requireNonNull(endExclusive, "endExclusive"); |
| @SuppressWarnings("unchecked") |
| ChronoZonedDateTime<D> end = (ChronoZonedDateTime<D>) getChronology().zonedDateTime(endExclusive); |
| if (unit instanceof ChronoUnit) { |
| end = end.withZoneSameInstant(offset); |
| return dateTime.until(end.toLocalDateTime(), unit); |
| } |
| Objects.requireNonNull(unit, "unit"); |
| return unit.between(this, end); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Writes the ChronoZonedDateTime using a |
| * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>. |
| * @serialData |
| * <pre> |
| * out.writeByte(3); // identifies a ChronoZonedDateTime |
| * out.writeObject(toLocalDateTime()); |
| * out.writeObject(getOffset()); |
| * out.writeObject(getZone()); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| @java.io.Serial |
| private Object writeReplace() { |
| return new Ser(Ser.CHRONO_ZONE_DATE_TIME_TYPE, this); |
| } |
| |
| /** |
| * Defend against malicious streams. |
| * |
| * @param s the stream to read |
| * @throws InvalidObjectException always |
| */ |
| @java.io.Serial |
| private void readObject(ObjectInputStream s) throws InvalidObjectException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| |
| void writeExternal(ObjectOutput out) throws IOException { |
| out.writeObject(dateTime); |
| out.writeObject(offset); |
| out.writeObject(zone); |
| } |
| |
| static ChronoZonedDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| ChronoLocalDateTime<?> dateTime = (ChronoLocalDateTime<?>) in.readObject(); |
| ZoneOffset offset = (ZoneOffset) in.readObject(); |
| ZoneId zone = (ZoneId) in.readObject(); |
| return dateTime.atZone(offset).withZoneSameLocal(zone); |
| // TODO: ZDT uses ofLenient() |
| } |
| |
| //------------------------------------------------------------------------- |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof ChronoZonedDateTime) { |
| return compareTo((ChronoZonedDateTime<?>) obj) == 0; |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return toLocalDateTime().hashCode() ^ getOffset().hashCode() ^ Integer.rotateLeft(getZone().hashCode(), 3); |
| } |
| |
| @Override |
| public String toString() { |
| String str = toLocalDateTime().toString() + getOffset().toString(); |
| if (getOffset() != getZone()) { |
| str += '[' + getZone().toString() + ']'; |
| } |
| return str; |
| } |
| |
| |
| } |
