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⏎ java/time/chrono/ChronoLocalDateTimeImpl.java
/*
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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/*
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* 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:
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* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
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* * 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.
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* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
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package java.time.chrono;
import static java.time.temporal.ChronoField.EPOCH_DAY;
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.LocalTime;
import java.time.ZoneId;
import java.time.temporal.ChronoField;
import java.time.temporal.ChronoUnit;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalAdjuster;
import java.time.temporal.TemporalField;
import java.time.temporal.TemporalUnit;
import java.time.temporal.ValueRange;
import java.util.Objects;
/**
* A date-time without a time-zone for the calendar neutral API.
* <p>
* {@code ChronoLocalDateTime} is an immutable date-time object that represents a date-time, often
* viewed as year-month-day-hour-minute-second. This object can also access other
* fields such as day-of-year, day-of-week and week-of-year.
* <p>
* This class stores all date and time fields, to a precision of nanoseconds.
* It does not store or represent a time-zone. For example, the value
* "2nd October 2007 at 13:45.30.123456789" can be stored in an {@code ChronoLocalDateTime}.
*
* @implSpec
* This class is immutable and thread-safe.
* @serial
* @param <D> the concrete type for the date of this date-time
* @since 1.8
*/
final class ChronoLocalDateTimeImpl<D extends ChronoLocalDate>
implements ChronoLocalDateTime<D>, Temporal, TemporalAdjuster, Serializable {
/**
* Serialization version.
*/
private static final long serialVersionUID = 4556003607393004514L;
/**
* Hours per day.
*/
static final int HOURS_PER_DAY = 24;
/**
* Minutes per hour.
*/
static final int MINUTES_PER_HOUR = 60;
/**
* Minutes per day.
*/
static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;
/**
* Seconds per minute.
*/
static final int SECONDS_PER_MINUTE = 60;
/**
* Seconds per hour.
*/
static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;
/**
* Seconds per day.
*/
static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;
/**
* Milliseconds per day.
*/
static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;
/**
* Microseconds per day.
*/
static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;
/**
* Nanos per second.
*/
static final long NANOS_PER_SECOND = 1000_000_000L;
/**
* Nanos per minute.
*/
static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;
/**
* Nanos per hour.
*/
static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;
/**
* Nanos per day.
*/
static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;
/**
* The date part.
*/
private final transient D date;
/**
* The time part.
*/
private final transient LocalTime time;
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code ChronoLocalDateTime} from a date and time.
*
* @param date the local date, not null
* @param time the local time, not null
* @return the local date-time, not null
*/
static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> of(R date, LocalTime time) {
return new ChronoLocalDateTimeImpl<>(date, time);
}
/**
* Casts the {@code Temporal} to {@code ChronoLocalDateTime} 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 ChronoLocalDateTime}, not null
* @throws ClassCastException if the date-time cannot be cast to ChronoLocalDateTimeImpl
* or the chronology is not equal this Chronology
*/
static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) {
@SuppressWarnings("unchecked")
ChronoLocalDateTimeImpl<R> other = (ChronoLocalDateTimeImpl<R>) temporal;
if (chrono.equals(other.getChronology()) == false) {
throw new ClassCastException("Chronology mismatch, required: " + chrono.getId()
+ ", actual: " + other.getChronology().getId());
}
return other;
}
/**
* Constructor.
*
* @param date the date part of the date-time, not null
* @param time the time part of the date-time, not null
*/
private ChronoLocalDateTimeImpl(D date, LocalTime time) {
Objects.requireNonNull(date, "date");
Objects.requireNonNull(time, "time");
this.date = date;
this.time = time;
}
/**
* Returns a copy of this date-time with the new date and time, checking
* to see if a new object is in fact required.
*
* @param newDate the date of the new date-time, not null
* @param newTime the time of the new date-time, not null
* @return the date-time, not null
*/
private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {
if (date == newDate && time == newTime) {
return this;
}
// Validate that the new Temporal is a ChronoLocalDate (and not something else)
D cd = ChronoLocalDateImpl.ensureValid(date.getChronology(), newDate);
return new ChronoLocalDateTimeImpl<>(cd, newTime);
}
//-----------------------------------------------------------------------
@Override
public D toLocalDate() {
return date;
}
@Override
public LocalTime toLocalTime() {
return time;
}
//-----------------------------------------------------------------------
@Override
public boolean isSupported(TemporalField field) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
return f.isDateBased() || f.isTimeBased();
}
return field != null && field.isSupportedBy(this);
}
@Override
public ValueRange range(TemporalField field) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
return (f.isTimeBased() ? time.range(field) : date.range(field));
}
return field.rangeRefinedBy(this);
}
@Override
public int get(TemporalField field) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
return (f.isTimeBased() ? time.get(field) : date.get(field));
}
return range(field).checkValidIntValue(getLong(field), field);
}
@Override
public long getLong(TemporalField field) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
return (f.isTimeBased() ? time.getLong(field) : date.getLong(field));
}
return field.getFrom(this);
}
//-----------------------------------------------------------------------
@SuppressWarnings("unchecked")
@Override
public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {
if (adjuster instanceof ChronoLocalDate) {
// The Chronology is checked in with(date,time)
return with((ChronoLocalDate) adjuster, time);
} else if (adjuster instanceof LocalTime) {
return with(date, (LocalTime) adjuster);
} else if (adjuster instanceof ChronoLocalDateTimeImpl) {
return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster);
}
return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this));
}
@Override
public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
if (f.isTimeBased()) {
return with(date, time.with(field, newValue));
} else {
return with(date.with(field, newValue), time);
}
}
return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), field.adjustInto(this, newValue));
}
//-----------------------------------------------------------------------
@Override
public ChronoLocalDateTimeImpl<D> plus(long amountToAdd, TemporalUnit unit) {
if (unit instanceof ChronoUnit) {
ChronoUnit f = (ChronoUnit) unit;
switch (f) {
case NANOS: return plusNanos(amountToAdd);
case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);
case SECONDS: return plusSeconds(amountToAdd);
case MINUTES: return plusMinutes(amountToAdd);
case HOURS: return plusHours(amountToAdd);
case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12); // no overflow (256 is multiple of 2)
}
return with(date.plus(amountToAdd, unit), time);
}
return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), unit.addTo(this, amountToAdd));
}
private ChronoLocalDateTimeImpl<D> plusDays(long days) {
return with(date.plus(days, ChronoUnit.DAYS), time);
}
private ChronoLocalDateTimeImpl<D> plusHours(long hours) {
return plusWithOverflow(date, hours, 0, 0, 0);
}
private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {
return plusWithOverflow(date, 0, minutes, 0, 0);
}
ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {
return plusWithOverflow(date, 0, 0, seconds, 0);
}
private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {
return plusWithOverflow(date, 0, 0, 0, nanos);
}
//-----------------------------------------------------------------------
private ChronoLocalDateTimeImpl<D> plusWithOverflow(D newDate, long hours, long minutes, long seconds, long nanos) {
// 9223372036854775808 long, 2147483648 int
if ((hours | minutes | seconds | nanos) == 0) {
return with(newDate, time);
}
long totDays = nanos / NANOS_PER_DAY + // max/24*60*60*1B
seconds / SECONDS_PER_DAY + // max/24*60*60
minutes / MINUTES_PER_DAY + // max/24*60
hours / HOURS_PER_DAY; // max/24
long totNanos = nanos % NANOS_PER_DAY + // max 86400000000000
(seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND + // max 86400000000000
(minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE + // max 86400000000000
(hours % HOURS_PER_DAY) * NANOS_PER_HOUR; // max 86400000000000
long curNoD = time.toNanoOfDay(); // max 86400000000000
totNanos = totNanos + curNoD; // total 432000000000000
totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);
long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);
LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));
return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);
}
//-----------------------------------------------------------------------
@Override
public ChronoZonedDateTime<D> atZone(ZoneId zone) {
return ChronoZonedDateTimeImpl.ofBest(this, zone, null);
}
//-----------------------------------------------------------------------
@Override
public long until(Temporal endExclusive, TemporalUnit unit) {
Objects.requireNonNull(endExclusive, "endExclusive");
@SuppressWarnings("unchecked")
ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) getChronology().localDateTime(endExclusive);
if (unit instanceof ChronoUnit) {
if (unit.isTimeBased()) {
long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);
switch ((ChronoUnit) unit) {
case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;
case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;
case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;
case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;
case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;
case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;
case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;
}
return Math.addExact(amount, time.until(end.toLocalTime(), unit));
}
ChronoLocalDate endDate = end.toLocalDate();
if (end.toLocalTime().isBefore(time)) {
endDate = endDate.minus(1, ChronoUnit.DAYS);
}
return date.until(endDate, unit);
}
Objects.requireNonNull(unit, "unit");
return unit.between(this, end);
}
//-----------------------------------------------------------------------
/**
* Writes the ChronoLocalDateTime using a
* <a href="../../../serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
* @serialData
* <pre>
* out.writeByte(2); // identifies a ChronoLocalDateTime
* out.writeObject(toLocalDate());
* out.witeObject(toLocalTime());
* </pre>
*
* @return the instance of {@code Ser}, not null
*/
private Object writeReplace() {
return new Ser(Ser.CHRONO_LOCAL_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(date);
out.writeObject(time);
}
static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
ChronoLocalDate date = (ChronoLocalDate) in.readObject();
LocalTime time = (LocalTime) in.readObject();
return date.atTime(time);
}
//-----------------------------------------------------------------------
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof ChronoLocalDateTime) {
return compareTo((ChronoLocalDateTime<?>) obj) == 0;
}
return false;
}
@Override
public int hashCode() {
return toLocalDate().hashCode() ^ toLocalTime().hashCode();
}
@Override
public String toString() {
return toLocalDate().toString() + 'T' + toLocalTime().toString();
}
}
⏎ java/time/chrono/ChronoLocalDateTimeImpl.java
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