/* * Copyright (c) 2012, 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. */ /* * 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. *

* {@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. *

* 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 the concrete type for the date of this date-time * @since 1.8 */ final class ChronoZonedDateTimeImpl implements ChronoZonedDateTime, Serializable { /** * Serialization version. */ private static final long serialVersionUID = -5261813987200935591L; /** * The local date-time. */ private final transient ChronoLocalDateTimeImpl 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 ChronoZonedDateTime ofBest( ChronoLocalDateTimeImpl 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 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 create(Instant instant, ZoneId zone) { return (ChronoZonedDateTimeImpl)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 ChronoZonedDateTimeImpl ensureValid(Chronology chrono, Temporal temporal) { @SuppressWarnings("unchecked") ChronoZonedDateTimeImpl other = (ChronoZonedDateTimeImpl) 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 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 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 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 toLocalDateTime() { return dateTime; } @Override public ZoneId getZone() { return zone; } @Override public ChronoZonedDateTime withZoneSameLocal(ZoneId zone) { return ofBest(dateTime, zone, offset); } @Override public ChronoZonedDateTime 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 with(TemporalField field, long newValue) { if (field instanceof ChronoField) { ChronoField f = (ChronoField) field; switch (f) { case INSTANT_SECONDS: return plus(newValue - toEpochSecond(), SECONDS); case OFFSET_SECONDS: { ZoneOffset offset = ZoneOffset.ofTotalSeconds(f.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 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 end = (ChronoZonedDateTime) 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 * dedicated serialized form. * @serialData *

     *  out.writeByte(3);                  // identifies a ChronoZonedDateTime
     *  out.writeObject(toLocalDateTime());
     *  out.writeObject(getOffset());
     *  out.writeObject(getZone());
     * 
* * @return the instance of {@code Ser}, not null */ 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 */ 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; } }