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OffsetDateTime.java
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1953 lines (1858 loc) · 84.2 KB
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/*
* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
/*
*
*
*
*
*
* 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;
import static java.time.temporal.ChronoField.EPOCH_DAY;
import static java.time.temporal.ChronoField.INSTANT_SECONDS;
import static java.time.temporal.ChronoField.NANO_OF_DAY;
import static java.time.temporal.ChronoField.OFFSET_SECONDS;
import static java.time.temporal.ChronoUnit.FOREVER;
import static java.time.temporal.ChronoUnit.NANOS;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.InvalidObjectException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.time.chrono.IsoChronology;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.temporal.ChronoField;
import java.time.temporal.ChronoUnit;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.TemporalAdjuster;
import java.time.temporal.TemporalAmount;
import java.time.temporal.TemporalField;
import java.time.temporal.TemporalQueries;
import java.time.temporal.TemporalQuery;
import java.time.temporal.TemporalUnit;
import java.time.temporal.UnsupportedTemporalTypeException;
import java.time.temporal.ValueRange;
import java.time.zone.ZoneRules;
import java.util.Comparator;
import java.util.Objects;
/**
* A date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system,
* such as {@code 2007-12-03T10:15:30+01:00}.
* <p>
* {@code OffsetDateTime} is an immutable representation of a date-time with an offset.
* This class stores all date and time fields, to a precision of nanoseconds,
* as well as the offset from UTC/Greenwich. For example, the value
* "2nd October 2007 at 13:45.30.123456789 +02:00" can be stored in an {@code OffsetDateTime}.
* <p>
* {@code OffsetDateTime}, {@link java.time.ZonedDateTime} and {@link java.time.Instant} all store an instant
* on the time-line to nanosecond precision.
* {@code Instant} is the simplest, simply representing the instant.
* {@code OffsetDateTime} adds to the instant the offset from UTC/Greenwich, which allows
* the local date-time to be obtained.
* {@code ZonedDateTime} adds full time-zone rules.
* <p>
* It is intended that {@code ZonedDateTime} or {@code Instant} is used to model data
* in simpler applications. This class may be used when modeling date-time concepts in
* more detail, or when communicating to a database or in a network protocol.
*
* <p>
* This is a <a href="{@docRoot}/java/lang/doc-files/ValueBased.html">value-based</a>
* class; use of identity-sensitive operations (including reference equality
* ({@code ==}), identity hash code, or synchronization) on instances of
* {@code OffsetDateTime} may have unpredictable results and should be avoided.
* The {@code equals} method should be used for comparisons.
*
* @implSpec
* This class is immutable and thread-safe.
*
* @since 1.8
*/
public final class OffsetDateTime
implements Temporal, TemporalAdjuster, Comparable<OffsetDateTime>, Serializable {
/**
* The minimum supported {@code OffsetDateTime}, '-999999999-01-01T00:00:00+18:00'.
* This is the local date-time of midnight at the start of the minimum date
* in the maximum offset (larger offsets are earlier on the time-line).
* This combines {@link LocalDateTime#MIN} and {@link ZoneOffset#MAX}.
* This could be used by an application as a "far past" date-time.
*/
public static final OffsetDateTime MIN = LocalDateTime.MIN.atOffset(ZoneOffset.MAX);
/**
* The maximum supported {@code OffsetDateTime}, '+999999999-12-31T23:59:59.999999999-18:00'.
* This is the local date-time just before midnight at the end of the maximum date
* in the minimum offset (larger negative offsets are later on the time-line).
* This combines {@link LocalDateTime#MAX} and {@link ZoneOffset#MIN}.
* This could be used by an application as a "far future" date-time.
*/
public static final OffsetDateTime MAX = LocalDateTime.MAX.atOffset(ZoneOffset.MIN);
/**
* Gets a comparator that compares two {@code OffsetDateTime} instances
* based solely on the instant.
* <p>
* This method differs from the comparison in {@link #compareTo} in that it
* only compares the underlying instant.
*
* @return a comparator that compares in time-line order
*
* @see #isAfter
* @see #isBefore
* @see #isEqual
*/
public static Comparator<OffsetDateTime> timeLineOrder() {
return OffsetDateTime::compareInstant;
}
/**
* Compares this {@code OffsetDateTime} to another date-time.
* The comparison is based on the instant.
*
* @param datetime1 the first date-time to compare, not null
* @param datetime2 the other date-time to compare to, not null
* @return the comparator value, negative if less, positive if greater
*/
private static int compareInstant(OffsetDateTime datetime1, OffsetDateTime datetime2) {
if (datetime1.getOffset().equals(datetime2.getOffset())) {
return datetime1.toLocalDateTime().compareTo(datetime2.toLocalDateTime());
}
int cmp = Long.compare(datetime1.toEpochSecond(), datetime2.toEpochSecond());
if (cmp == 0) {
cmp = datetime1.toLocalTime().getNano() - datetime2.toLocalTime().getNano();
}
return cmp;
}
/**
* Serialization version.
*/
private static final long serialVersionUID = 2287754244819255394L;
/**
* The local date-time.
*/
private final LocalDateTime dateTime;
/**
* The offset from UTC/Greenwich.
*/
private final ZoneOffset offset;
//-----------------------------------------------------------------------
/**
* Obtains the current date-time from the system clock in the default time-zone.
* <p>
* This will query the {@link Clock#systemDefaultZone() system clock} in the default
* time-zone to obtain the current date-time.
* The offset will be calculated from the time-zone in the clock.
* <p>
* Using this method will prevent the ability to use an alternate clock for testing
* because the clock is hard-coded.
*
* @return the current date-time using the system clock, not null
*/
public static OffsetDateTime now() {
return now(Clock.systemDefaultZone());
}
/**
* Obtains the current date-time from the system clock in the specified time-zone.
* <p>
* This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date-time.
* Specifying the time-zone avoids dependence on the default time-zone.
* The offset will be calculated from the specified time-zone.
* <p>
* Using this method will prevent the ability to use an alternate clock for testing
* because the clock is hard-coded.
*
* @param zone the zone ID to use, not null
* @return the current date-time using the system clock, not null
*/
public static OffsetDateTime now(ZoneId zone) {
return now(Clock.system(zone));
}
/**
* Obtains the current date-time from the specified clock.
* <p>
* This will query the specified clock to obtain the current date-time.
* The offset will be calculated from the time-zone in the clock.
* <p>
* Using this method allows the use of an alternate clock for testing.
* The alternate clock may be introduced using {@link Clock dependency injection}.
*
* @param clock the clock to use, not null
* @return the current date-time, not null
*/
public static OffsetDateTime now(Clock clock) {
Objects.requireNonNull(clock, "clock");
final Instant now = clock.instant(); // called once
return ofInstant(now, clock.getZone().getRules().getOffset(now));
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code OffsetDateTime} from a date, time and offset.
* <p>
* This creates an offset date-time with the specified local date, time and offset.
*
* @param date the local date, not null
* @param time the local time, not null
* @param offset the zone offset, not null
* @return the offset date-time, not null
*/
public static OffsetDateTime of(LocalDate date, LocalTime time, ZoneOffset offset) {
LocalDateTime dt = LocalDateTime.of(date, time);
return new OffsetDateTime(dt, offset);
}
/**
* Obtains an instance of {@code OffsetDateTime} from a date-time and offset.
* <p>
* This creates an offset date-time with the specified local date-time and offset.
*
* @param dateTime the local date-time, not null
* @param offset the zone offset, not null
* @return the offset date-time, not null
*/
public static OffsetDateTime of(LocalDateTime dateTime, ZoneOffset offset) {
return new OffsetDateTime(dateTime, offset);
}
/**
* Obtains an instance of {@code OffsetDateTime} from a year, month, day,
* hour, minute, second, nanosecond and offset.
* <p>
* This creates an offset date-time with the seven specified fields.
* <p>
* This method exists primarily for writing test cases.
* Non test-code will typically use other methods to create an offset time.
* {@code LocalDateTime} has five additional convenience variants of the
* equivalent factory method taking fewer arguments.
* They are not provided here to reduce the footprint of the API.
*
* @param year the year to represent, from MIN_YEAR to MAX_YEAR
* @param month the month-of-year to represent, from 1 (January) to 12 (December)
* @param dayOfMonth the day-of-month to represent, from 1 to 31
* @param hour the hour-of-day to represent, from 0 to 23
* @param minute the minute-of-hour to represent, from 0 to 59
* @param second the second-of-minute to represent, from 0 to 59
* @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999
* @param offset the zone offset, not null
* @return the offset date-time, not null
* @throws DateTimeException if the value of any field is out of range, or
* if the day-of-month is invalid for the month-year
*/
public static OffsetDateTime of(
int year, int month, int dayOfMonth,
int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset) {
LocalDateTime dt = LocalDateTime.of(year, month, dayOfMonth, hour, minute, second, nanoOfSecond);
return new OffsetDateTime(dt, offset);
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code OffsetDateTime} from an {@code Instant} and zone ID.
* <p>
* This creates an offset date-time with the same instant as that specified.
* Finding the offset from UTC/Greenwich is simple as there is only one valid
* offset for each instant.
*
* @param instant the instant to create the date-time from, not null
* @param zone the time-zone, which may be an offset, not null
* @return the offset date-time, not null
* @throws DateTimeException if the result exceeds the supported range
*/
public static OffsetDateTime ofInstant(Instant instant, ZoneId zone) {
Objects.requireNonNull(instant, "instant");
Objects.requireNonNull(zone, "zone");
ZoneRules rules = zone.getRules();
ZoneOffset offset = rules.getOffset(instant);
LocalDateTime ldt = LocalDateTime.ofEpochSecond(instant.getEpochSecond(), instant.getNano(), offset);
return new OffsetDateTime(ldt, offset);
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code OffsetDateTime} from a temporal object.
* <p>
* This obtains an offset date-time based on the specified temporal.
* A {@code TemporalAccessor} represents an arbitrary set of date and time information,
* which this factory converts to an instance of {@code OffsetDateTime}.
* <p>
* The conversion will first obtain a {@code ZoneOffset} from the temporal object.
* It will then try to obtain a {@code LocalDateTime}, falling back to an {@code Instant} if necessary.
* The result will be the combination of {@code ZoneOffset} with either
* with {@code LocalDateTime} or {@code Instant}.
* Implementations are permitted to perform optimizations such as accessing
* those fields that are equivalent to the relevant objects.
* <p>
* This method matches the signature of the functional interface {@link TemporalQuery}
* allowing it to be used as a query via method reference, {@code OffsetDateTime::from}.
*
* @param temporal the temporal object to convert, not null
* @return the offset date-time, not null
* @throws DateTimeException if unable to convert to an {@code OffsetDateTime}
*/
public static OffsetDateTime from(TemporalAccessor temporal) {
if (temporal instanceof OffsetDateTime) {
return (OffsetDateTime) temporal;
}
try {
ZoneOffset offset = ZoneOffset.from(temporal);
LocalDate date = temporal.query(TemporalQueries.localDate());
LocalTime time = temporal.query(TemporalQueries.localTime());
if (date != null && time != null) {
return OffsetDateTime.of(date, time, offset);
} else {
Instant instant = Instant.from(temporal);
return OffsetDateTime.ofInstant(instant, offset);
}
} catch (DateTimeException ex) {
throw new DateTimeException("Unable to obtain OffsetDateTime from TemporalAccessor: " +
temporal + " of type " + temporal.getClass().getName(), ex);
}
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code OffsetDateTime} from a text string
* such as {@code 2007-12-03T10:15:30+01:00}.
* <p>
* The string must represent a valid date-time and is parsed using
* {@link java.time.format.DateTimeFormatter#ISO_OFFSET_DATE_TIME}.
*
* @param text the text to parse such as "2007-12-03T10:15:30+01:00", not null
* @return the parsed offset date-time, not null
* @throws DateTimeParseException if the text cannot be parsed
*/
public static OffsetDateTime parse(CharSequence text) {
return parse(text, DateTimeFormatter.ISO_OFFSET_DATE_TIME);
}
/**
* Obtains an instance of {@code OffsetDateTime} from a text string using a specific formatter.
* <p>
* The text is parsed using the formatter, returning a date-time.
*
* @param text the text to parse, not null
* @param formatter the formatter to use, not null
* @return the parsed offset date-time, not null
* @throws DateTimeParseException if the text cannot be parsed
*/
public static OffsetDateTime parse(CharSequence text, DateTimeFormatter formatter) {
Objects.requireNonNull(formatter, "formatter");
return formatter.parse(text, OffsetDateTime::from);
}
//-----------------------------------------------------------------------
/**
* Constructor.
*
* @param dateTime the local date-time, not null
* @param offset the zone offset, not null
*/
private OffsetDateTime(LocalDateTime dateTime, ZoneOffset offset) {
this.dateTime = Objects.requireNonNull(dateTime, "dateTime");
this.offset = Objects.requireNonNull(offset, "offset");
}
/**
* Returns a new date-time based on this one, returning {@code this} where possible.
*
* @param dateTime the date-time to create with, not null
* @param offset the zone offset to create with, not null
*/
private OffsetDateTime with(LocalDateTime dateTime, ZoneOffset offset) {
if (this.dateTime == dateTime && this.offset.equals(offset)) {
return this;
}
return new OffsetDateTime(dateTime, offset);
}
//-----------------------------------------------------------------------
/**
* Checks if the specified field is supported.
* <p>
* This checks if this date-time can be queried for the specified field.
* If false, then calling the {@link #range(TemporalField) range},
* {@link #get(TemporalField) get} and {@link #with(TemporalField, long)}
* methods will throw an exception.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The supported fields are:
* <ul>
* <li>{@code NANO_OF_SECOND}
* <li>{@code NANO_OF_DAY}
* <li>{@code MICRO_OF_SECOND}
* <li>{@code MICRO_OF_DAY}
* <li>{@code MILLI_OF_SECOND}
* <li>{@code MILLI_OF_DAY}
* <li>{@code SECOND_OF_MINUTE}
* <li>{@code SECOND_OF_DAY}
* <li>{@code MINUTE_OF_HOUR}
* <li>{@code MINUTE_OF_DAY}
* <li>{@code HOUR_OF_AMPM}
* <li>{@code CLOCK_HOUR_OF_AMPM}
* <li>{@code HOUR_OF_DAY}
* <li>{@code CLOCK_HOUR_OF_DAY}
* <li>{@code AMPM_OF_DAY}
* <li>{@code DAY_OF_WEEK}
* <li>{@code ALIGNED_DAY_OF_WEEK_IN_MONTH}
* <li>{@code ALIGNED_DAY_OF_WEEK_IN_YEAR}
* <li>{@code DAY_OF_MONTH}
* <li>{@code DAY_OF_YEAR}
* <li>{@code EPOCH_DAY}
* <li>{@code ALIGNED_WEEK_OF_MONTH}
* <li>{@code ALIGNED_WEEK_OF_YEAR}
* <li>{@code MONTH_OF_YEAR}
* <li>{@code PROLEPTIC_MONTH}
* <li>{@code YEAR_OF_ERA}
* <li>{@code YEAR}
* <li>{@code ERA}
* <li>{@code INSTANT_SECONDS}
* <li>{@code OFFSET_SECONDS}
* </ul>
* All other {@code ChronoField} instances will return false.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)}
* passing {@code this} as the argument.
* Whether the field is supported is determined by the field.
*
* @param field the field to check, null returns false
* @return true if the field is supported on this date-time, false if not
*/
@Override
public boolean isSupported(TemporalField field) {
return field instanceof ChronoField || (field != null && field.isSupportedBy(this));
}
/**
* Checks if the specified unit is supported.
* <p>
* This checks if the specified unit can be added to, or subtracted from, this date-time.
* If false, then calling the {@link #plus(long, TemporalUnit)} and
* {@link #minus(long, TemporalUnit) minus} methods will throw an exception.
* <p>
* If the unit is a {@link ChronoUnit} then the query is implemented here.
* The supported units are:
* <ul>
* <li>{@code NANOS}
* <li>{@code MICROS}
* <li>{@code MILLIS}
* <li>{@code SECONDS}
* <li>{@code MINUTES}
* <li>{@code HOURS}
* <li>{@code HALF_DAYS}
* <li>{@code DAYS}
* <li>{@code WEEKS}
* <li>{@code MONTHS}
* <li>{@code YEARS}
* <li>{@code DECADES}
* <li>{@code CENTURIES}
* <li>{@code MILLENNIA}
* <li>{@code ERAS}
* </ul>
* All other {@code ChronoUnit} instances will return false.
* <p>
* If the unit is not a {@code ChronoUnit}, then the result of this method
* is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)}
* passing {@code this} as the argument.
* Whether the unit is supported is determined by the unit.
*
* @param unit the unit to check, null returns false
* @return true if the unit can be added/subtracted, false if not
*/
@Override // override for Javadoc
public boolean isSupported(TemporalUnit unit) {
if (unit instanceof ChronoUnit) {
return unit != FOREVER;
}
return unit != null && unit.isSupportedBy(this);
}
//-----------------------------------------------------------------------
/**
* Gets the range of valid values for the specified field.
* <p>
* The range object expresses the minimum and maximum valid values for a field.
* This date-time is used to enhance the accuracy of the returned range.
* If it is not possible to return the range, because the field is not supported
* or for some other reason, an exception is thrown.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link #isSupported(TemporalField) supported fields} will return
* appropriate range instances.
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
* passing {@code this} as the argument.
* Whether the range can be obtained is determined by the field.
*
* @param field the field to query the range for, not null
* @return the range of valid values for the field, not null
* @throws DateTimeException if the range for the field cannot be obtained
* @throws UnsupportedTemporalTypeException if the field is not supported
*/
@Override
public ValueRange range(TemporalField field) {
if (field instanceof ChronoField) {
if (field == INSTANT_SECONDS || field == OFFSET_SECONDS) {
return field.range();
}
return dateTime.range(field);
}
return field.rangeRefinedBy(this);
}
/**
* Gets the value of the specified field from this date-time as an {@code int}.
* <p>
* This queries this date-time for the value of the specified field.
* The returned value will always be within the valid range of values for the field.
* If it is not possible to return the value, because the field is not supported
* or for some other reason, an exception is thrown.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link #isSupported(TemporalField) supported fields} will return valid
* values based on this date-time, except {@code NANO_OF_DAY}, {@code MICRO_OF_DAY},
* {@code EPOCH_DAY}, {@code PROLEPTIC_MONTH} and {@code INSTANT_SECONDS} which are too
* large to fit in an {@code int} and throw a {@code DateTimeException}.
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
* passing {@code this} as the argument. Whether the value can be obtained,
* and what the value represents, is determined by the field.
*
* @param field the field to get, not null
* @return the value for the field
* @throws DateTimeException if a value for the field cannot be obtained or
* the value is outside the range of valid values for the field
* @throws UnsupportedTemporalTypeException if the field is not supported or
* the range of values exceeds an {@code int}
* @throws ArithmeticException if numeric overflow occurs
*/
@Override
public int get(TemporalField field) {
if (field instanceof ChronoField) {
switch ((ChronoField) field) {
case INSTANT_SECONDS:
throw new UnsupportedTemporalTypeException("Invalid field 'InstantSeconds' for get() method, use getLong() instead");
case OFFSET_SECONDS:
return getOffset().getTotalSeconds();
}
return dateTime.get(field);
}
return Temporal.super.get(field);
}
/**
* Gets the value of the specified field from this date-time as a {@code long}.
* <p>
* This queries this date-time for the value of the specified field.
* If it is not possible to return the value, because the field is not supported
* or for some other reason, an exception is thrown.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link #isSupported(TemporalField) supported fields} will return valid
* values based on this date-time.
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
* passing {@code this} as the argument. Whether the value can be obtained,
* and what the value represents, is determined by the field.
*
* @param field the field to get, not null
* @return the value for the field
* @throws DateTimeException if a value for the field cannot be obtained
* @throws UnsupportedTemporalTypeException if the field is not supported
* @throws ArithmeticException if numeric overflow occurs
*/
@Override
public long getLong(TemporalField field) {
if (field instanceof ChronoField) {
switch ((ChronoField) field) {
case INSTANT_SECONDS: return toEpochSecond();
case OFFSET_SECONDS: return getOffset().getTotalSeconds();
}
return dateTime.getLong(field);
}
return field.getFrom(this);
}
//-----------------------------------------------------------------------
/**
* Gets the zone offset, such as '+01:00'.
* <p>
* This is the offset of the local date-time from UTC/Greenwich.
*
* @return the zone offset, not null
*/
public ZoneOffset getOffset() {
return offset;
}
/**
* Returns a copy of this {@code OffsetDateTime} with the specified offset ensuring
* that the result has the same local date-time.
* <p>
* This method returns an object with the same {@code LocalDateTime} and the specified {@code ZoneOffset}.
* No calculation is needed or performed.
* For example, if this time represents {@code 2007-12-03T10:30+02:00} and the offset specified is
* {@code +03:00}, then this method will return {@code 2007-12-03T10:30+03:00}.
* <p>
* To take into account the difference between the offsets, and adjust the time fields,
* use {@link #withOffsetSameInstant}.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param offset the zone offset to change to, not null
* @return an {@code OffsetDateTime} based on this date-time with the requested offset, not null
*/
public OffsetDateTime withOffsetSameLocal(ZoneOffset offset) {
return with(dateTime, offset);
}
/**
* Returns a copy of this {@code OffsetDateTime} with the specified offset ensuring
* that the result is at the same instant.
* <p>
* This method returns an object with the specified {@code ZoneOffset} and a {@code LocalDateTime}
* adjusted by the difference between the two offsets.
* This will result in the old and new objects representing the same instant.
* This is useful for finding the local time in a different offset.
* For example, if this time represents {@code 2007-12-03T10:30+02:00} and the offset specified is
* {@code +03:00}, then this method will return {@code 2007-12-03T11:30+03:00}.
* <p>
* To change the offset without adjusting the local time use {@link #withOffsetSameLocal}.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param offset the zone offset to change to, not null
* @return an {@code OffsetDateTime} based on this date-time with the requested offset, not null
* @throws DateTimeException if the result exceeds the supported date range
*/
public OffsetDateTime withOffsetSameInstant(ZoneOffset offset) {
if (offset.equals(this.offset)) {
return this;
}
int difference = offset.getTotalSeconds() - this.offset.getTotalSeconds();
LocalDateTime adjusted = dateTime.plusSeconds(difference);
return new OffsetDateTime(adjusted, offset);
}
//-----------------------------------------------------------------------
/**
* Gets the {@code LocalDateTime} part of this date-time.
* <p>
* This returns a {@code LocalDateTime} with the same year, month, day and time
* as this date-time.
*
* @return the local date-time part of this date-time, not null
*/
public LocalDateTime toLocalDateTime() {
return dateTime;
}
//-----------------------------------------------------------------------
/**
* Gets the {@code LocalDate} part of this date-time.
* <p>
* This returns a {@code LocalDate} with the same year, month and day
* as this date-time.
*
* @return the date part of this date-time, not null
*/
public LocalDate toLocalDate() {
return dateTime.toLocalDate();
}
/**
* Gets the year field.
* <p>
* This method returns the primitive {@code int} value for the year.
* <p>
* The year returned by this method is proleptic as per {@code get(YEAR)}.
* To obtain the year-of-era, use {@code get(YEAR_OF_ERA)}.
*
* @return the year, from MIN_YEAR to MAX_YEAR
*/
public int getYear() {
return dateTime.getYear();
}
/**
* Gets the month-of-year field from 1 to 12.
* <p>
* This method returns the month as an {@code int} from 1 to 12.
* Application code is frequently clearer if the enum {@link Month}
* is used by calling {@link #getMonth()}.
*
* @return the month-of-year, from 1 to 12
* @see #getMonth()
*/
public int getMonthValue() {
return dateTime.getMonthValue();
}
/**
* Gets the month-of-year field using the {@code Month} enum.
* <p>
* This method returns the enum {@link Month} for the month.
* This avoids confusion as to what {@code int} values mean.
* If you need access to the primitive {@code int} value then the enum
* provides the {@link Month#getValue() int value}.
*
* @return the month-of-year, not null
* @see #getMonthValue()
*/
public Month getMonth() {
return dateTime.getMonth();
}
/**
* Gets the day-of-month field.
* <p>
* This method returns the primitive {@code int} value for the day-of-month.
*
* @return the day-of-month, from 1 to 31
*/
public int getDayOfMonth() {
return dateTime.getDayOfMonth();
}
/**
* Gets the day-of-year field.
* <p>
* This method returns the primitive {@code int} value for the day-of-year.
*
* @return the day-of-year, from 1 to 365, or 366 in a leap year
*/
public int getDayOfYear() {
return dateTime.getDayOfYear();
}
/**
* Gets the day-of-week field, which is an enum {@code DayOfWeek}.
* <p>
* This method returns the enum {@link DayOfWeek} for the day-of-week.
* This avoids confusion as to what {@code int} values mean.
* If you need access to the primitive {@code int} value then the enum
* provides the {@link DayOfWeek#getValue() int value}.
* <p>
* Additional information can be obtained from the {@code DayOfWeek}.
* This includes textual names of the values.
*
* @return the day-of-week, not null
*/
public DayOfWeek getDayOfWeek() {
return dateTime.getDayOfWeek();
}
//-----------------------------------------------------------------------
/**
* Gets the {@code LocalTime} part of this date-time.
* <p>
* This returns a {@code LocalTime} with the same hour, minute, second and
* nanosecond as this date-time.
*
* @return the time part of this date-time, not null
*/
public LocalTime toLocalTime() {
return dateTime.toLocalTime();
}
/**
* Gets the hour-of-day field.
*
* @return the hour-of-day, from 0 to 23
*/
public int getHour() {
return dateTime.getHour();
}
/**
* Gets the minute-of-hour field.
*
* @return the minute-of-hour, from 0 to 59
*/
public int getMinute() {
return dateTime.getMinute();
}
/**
* Gets the second-of-minute field.
*
* @return the second-of-minute, from 0 to 59
*/
public int getSecond() {
return dateTime.getSecond();
}
/**
* Gets the nano-of-second field.
*
* @return the nano-of-second, from 0 to 999,999,999
*/
public int getNano() {
return dateTime.getNano();
}
//-----------------------------------------------------------------------
/**
* Returns an adjusted copy of this date-time.
* <p>
* This returns an {@code OffsetDateTime}, based on this one, with the date-time adjusted.
* The adjustment takes place using the specified adjuster strategy object.
* Read the documentation of the adjuster to understand what adjustment will be made.
* <p>
* A simple adjuster might simply set the one of the fields, such as the year field.
* A more complex adjuster might set the date to the last day of the month.
* A selection of common adjustments is provided in
* {@link java.time.temporal.TemporalAdjusters TemporalAdjusters}.
* These include finding the "last day of the month" and "next Wednesday".
* Key date-time classes also implement the {@code TemporalAdjuster} interface,
* such as {@link Month} and {@link java.time.MonthDay MonthDay}.
* The adjuster is responsible for handling special cases, such as the varying
* lengths of month and leap years.
* <p>
* For example this code returns a date on the last day of July:
* <pre>
* import static java.time.Month.*;
* import static java.time.temporal.TemporalAdjusters.*;
*
* result = offsetDateTime.with(JULY).with(lastDayOfMonth());
* </pre>
* <p>
* The classes {@link LocalDate}, {@link LocalTime} and {@link ZoneOffset} implement
* {@code TemporalAdjuster}, thus this method can be used to change the date, time or offset:
* <pre>
* result = offsetDateTime.with(date);
* result = offsetDateTime.with(time);
* result = offsetDateTime.with(offset);
* </pre>
* <p>
* The result of this method is obtained by invoking the
* {@link TemporalAdjuster#adjustInto(Temporal)} method on the
* specified adjuster passing {@code this} as the argument.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param adjuster the adjuster to use, not null
* @return an {@code OffsetDateTime} based on {@code this} with the adjustment made, not null
* @throws DateTimeException if the adjustment cannot be made
* @throws ArithmeticException if numeric overflow occurs
*/
@Override
public OffsetDateTime with(TemporalAdjuster adjuster) {
// optimizations
if (adjuster instanceof LocalDate || adjuster instanceof LocalTime || adjuster instanceof LocalDateTime) {
return with(dateTime.with(adjuster), offset);
} else if (adjuster instanceof Instant) {
return ofInstant((Instant) adjuster, offset);
} else if (adjuster instanceof ZoneOffset) {
return with(dateTime, (ZoneOffset) adjuster);
} else if (adjuster instanceof OffsetDateTime) {
return (OffsetDateTime) adjuster;
}
return (OffsetDateTime) adjuster.adjustInto(this);
}
/**
* Returns a copy of this date-time with the specified field set to a new value.
* <p>
* This returns an {@code OffsetDateTime}, based on this one, with the value
* for the specified field changed.
* This can be used to change any supported field, such as the year, month or day-of-month.
* If it is not possible to set the value, because the field is not supported or for
* some other reason, an exception is thrown.
* <p>
* In some cases, changing the specified field can cause the resulting date-time to become invalid,
* such as changing the month from 31st January to February would make the day-of-month invalid.
* In cases like this, the field is responsible for resolving the date. Typically it will choose
* the previous valid date, which would be the last valid day of February in this example.
* <p>
* If the field is a {@link ChronoField} then the adjustment is implemented here.
* <p>
* The {@code INSTANT_SECONDS} field will return a date-time with the specified instant.
* The offset and nano-of-second are unchanged.
* If the new instant value is outside the valid range then a {@code DateTimeException} will be thrown.
* <p>
* The {@code OFFSET_SECONDS} field will return a date-time with the specified offset.
* The local date-time is unaltered. If the new offset value is outside the valid range
* then a {@code DateTimeException} will be thrown.
* <p>
* The other {@link #isSupported(TemporalField) supported fields} will behave as per
* the matching method on {@link LocalDateTime#with(TemporalField, long) LocalDateTime}.
* In this case, the offset is not part of the calculation and will be unchanged.
* <p>
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)}
* passing {@code this} as the argument. In this case, the field determines
* whether and how to adjust the instant.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param field the field to set in the result, not null
* @param newValue the new value of the field in the result
* @return an {@code OffsetDateTime} based on {@code this} with the specified field set, not null
* @throws DateTimeException if the field cannot be set
* @throws UnsupportedTemporalTypeException if the field is not supported
* @throws ArithmeticException if numeric overflow occurs
*/
@Override
public OffsetDateTime with(TemporalField field, long newValue) {
if (field instanceof ChronoField) {
ChronoField f = (ChronoField) field;
switch (f) {
case INSTANT_SECONDS: return ofInstant(Instant.ofEpochSecond(newValue, getNano()), offset);
case OFFSET_SECONDS: {
return with(dateTime, ZoneOffset.ofTotalSeconds(f.checkValidIntValue(newValue)));
}
}
return with(dateTime.with(field, newValue), offset);
}
return field.adjustInto(this, newValue);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this {@code OffsetDateTime} with the year altered.
* <p>
* The time and offset do not affect the calculation and will be the same in the result.
* If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param year the year to set in the result, from MIN_YEAR to MAX_YEAR
* @return an {@code OffsetDateTime} based on this date-time with the requested year, not null
* @throws DateTimeException if the year value is invalid
*/
public OffsetDateTime withYear(int year) {
return with(dateTime.withYear(year), offset);
}
/**
* Returns a copy of this {@code OffsetDateTime} with the month-of-year altered.
* <p>