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/*
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* Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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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.
*/
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 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<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="../../../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
*/
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;
}
}