org.joda.time.DateTime Maven / Gradle / Ivy
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/*
* Copyright 2001-2014 Stephen Colebourne
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.joda.time;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Locale;
import org.joda.convert.FromString;
import org.joda.time.base.BaseDateTime;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.field.AbstractReadableInstantFieldProperty;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
/**
* DateTime is the standard implementation of an unmodifiable datetime class.
*
* DateTime is the most widely used implementation of
* {@link ReadableInstant}. As with all instants, it represents an exact
* point on the time-line, but limited to the precision of milliseconds.
* A DateTime calculates its fields with respect to a
* {@link DateTimeZone time zone}.
*
* Internally, the class holds two pieces of data. Firstly, it holds the
* datetime as milliseconds from the Java epoch of 1970-01-01T00:00:00Z.
* Secondly, it holds a {@link Chronology} which determines how the
* millisecond instant value is converted into the date time fields.
* The default Chronology is {@link ISOChronology} which is the agreed
* international standard and compatible with the modern Gregorian calendar.
*
* Each individual field can be queried in two ways:
*
* getHourOfDay()
* hourOfDay().get()
*
* The second technique also provides access to other useful methods on the
* field:
*
* - numeric value
*
- text value
*
- short text value
*
- maximum/minimum values
*
- add/subtract
*
- set
*
- rounding
*
*
* DateTime is thread-safe and immutable, provided that the Chronology is as well.
* All standard Chronology classes supplied are thread-safe and immutable.
*
* @author Stephen Colebourne
* @author Kandarp Shah
* @author Brian S O'Neill
* @since 1.0
* @see MutableDateTime
*/
public final class DateTime
extends BaseDateTime
implements ReadableDateTime, Serializable {
/** Serialization lock */
private static final long serialVersionUID = -5171125899451703815L;
//-----------------------------------------------------------------------
/**
* Obtains a {@code DateTime} set to the current system millisecond time
* using ISOChronology in the default time zone.
*
* @return the current date-time, not null
* @since 2.0
*/
public static DateTime now() {
return new DateTime();
}
/**
* Obtains a {@code DateTime} set to the current system millisecond time
* using ISOChronology in the specified time zone.
*
* @param zone the time zone, not null
* @return the current date-time, not null
* @since 2.0
*/
public static DateTime now(DateTimeZone zone) {
if (zone == null) {
throw new NullPointerException("Zone must not be null");
}
return new DateTime(zone);
}
/**
* Obtains a {@code DateTime} set to the current system millisecond time
* using the specified chronology.
*
* @param chronology the chronology, not null
* @return the current date-time, not null
* @since 2.0
*/
public static DateTime now(Chronology chronology) {
if (chronology == null) {
throw new NullPointerException("Chronology must not be null");
}
return new DateTime(chronology);
}
//-----------------------------------------------------------------------
/**
* Parses a {@code DateTime} from the specified string.
*
* This uses {@link ISODateTimeFormat#dateTimeParser()}{@code .withOffsetParsed()}
* which is different to passing a {@code String} to the constructor.
*
* Sometimes this method and {@code new DateTime(str)} return different results.
* This can be confusing as the difference is not visible in {@link #toString()}.
*
* When passed a date-time string without an offset, such as '2010-06-30T01:20',
* both the constructor and this method use the default time-zone.
* As such, {@code DateTime.parse("2010-06-30T01:20")} and
* {@code new DateTime("2010-06-30T01:20"))} are equal.
*
* However, when this method is passed a date-time string with an offset,
* the offset is directly parsed and stored.
* As such, {@code DateTime.parse("2010-06-30T01:20+02:00")} and
* {@code new DateTime("2010-06-30T01:20+02:00"))} are NOT equal.
* The object produced via this method has a zone of {@code DateTimeZone.forOffsetHours(2)}.
* The object produced via the constructor has a zone of {@code DateTimeZone.getDefault()}.
*
* @param str the string to parse, not null
* @since 2.0
*/
@FromString
public static DateTime parse(String str) {
return parse(str, ISODateTimeFormat.dateTimeParser().withOffsetParsed());
}
/**
* Parses a {@code DateTime} from the specified string using a formatter.
*
* @param str the string to parse, not null
* @param formatter the formatter to use, not null
* @since 2.0
*/
public static DateTime parse(String str, DateTimeFormatter formatter) {
return formatter.parseDateTime(str);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the current system millisecond time
* using ISOChronology in the default time zone.
*
* @see #now()
*/
public DateTime() {
super();
}
/**
* Constructs an instance set to the current system millisecond time
* using ISOChronology in the specified time zone.
*
* If the specified time zone is null, the default zone is used.
*
* @param zone the time zone, null means default zone
* @see #now(DateTimeZone)
*/
public DateTime(DateTimeZone zone) {
super(zone);
}
/**
* Constructs an instance set to the current system millisecond time
* using the specified chronology.
*
* If the chronology is null, ISOChronology
* in the default time zone is used.
*
* @param chronology the chronology, null means ISOChronology in default zone
* @see #now(Chronology)
*/
public DateTime(Chronology chronology) {
super(chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using ISOChronology in the default time zone.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
*/
public DateTime(long instant) {
super(instant);
}
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using ISOChronology in the specified time zone.
*
* If the specified time zone is null, the default zone is used.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param zone the time zone, null means default zone
*/
public DateTime(long instant, DateTimeZone zone) {
super(instant, zone);
}
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using the specified chronology.
*
* If the chronology is null, ISOChronology
* in the default time zone is used.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param chronology the chronology, null means ISOChronology in default zone
*/
public DateTime(long instant, Chronology chronology) {
super(instant, chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from an Object that represents a datetime.
*
* If the object implies a chronology (such as GregorianCalendar does),
* then that chronology will be used. Otherwise, ISO default is used.
* Thus if a GregorianCalendar is passed in, the chronology used will
* be GJ, but if a Date is passed in the chronology will be ISO.
*
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#dateTimeParser()}.
*
* @param instant the datetime object, null means now
* @throws IllegalArgumentException if the instant is invalid
*/
public DateTime(Object instant) {
super(instant, (Chronology) null);
}
/**
* Constructs an instance from an Object that represents a datetime,
* forcing the time zone to that specified.
*
* If the object implies a chronology (such as GregorianCalendar does),
* then that chronology will be used, but with the time zone adjusted.
* Otherwise, ISO is used in the specified time zone.
* If the specified time zone is null, the default zone is used.
* Thus if a GregorianCalendar is passed in, the chronology used will
* be GJ, but if a Date is passed in the chronology will be ISO.
*
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#dateTimeParser()}.
*
* @param instant the datetime object, null means now
* @param zone the time zone, null means default time zone
* @throws IllegalArgumentException if the instant is invalid
*/
public DateTime(Object instant, DateTimeZone zone) {
super(instant, zone);
}
/**
* Constructs an instance from an Object that represents a datetime,
* using the specified chronology.
*
* If the chronology is null, ISO in the default time zone is used.
* Any chronology implied by the object (such as GregorianCalendar does)
* is ignored.
*
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#dateTimeParser()}.
*
* @param instant the datetime object, null means now
* @param chronology the chronology, null means ISO in default zone
* @throws IllegalArgumentException if the instant is invalid
*/
public DateTime(Object instant, Chronology chronology) {
super(instant, DateTimeUtils.getChronology(chronology));
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from datetime field values
* using ISOChronology in the default time zone.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour) {
super(year, monthOfYear, dayOfMonth, hourOfDay, minuteOfHour, 0, 0);
}
/**
* Constructs an instance from datetime field values
* using ISOChronology in the specified time zone.
*
* If the specified time zone is null, the default zone is used.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @param zone the time zone, null means default time zone
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
DateTimeZone zone) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, 0, 0, zone);
}
/**
* Constructs an instance from datetime field values
* using the specified chronology.
*
* If the chronology is null, ISOChronology
* in the default time zone is used.
*
* @param year the year, valid values defined by the chronology
* @param monthOfYear the month of the year, valid values defined by the chronology
* @param dayOfMonth the day of the month, valid values defined by the chronology
* @param hourOfDay the hour of the day, valid values defined by the chronology
* @param minuteOfHour the minute of the hour, valid values defined by the chronology
* @param chronology the chronology, null means ISOChronology in default zone
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
Chronology chronology) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, 0, 0, chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from datetime field values
* using ISOChronology in the default time zone.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @param secondOfMinute the second of the minute, from 0 to 59
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute) {
super(year, monthOfYear, dayOfMonth, hourOfDay, minuteOfHour, secondOfMinute, 0);
}
/**
* Constructs an instance from datetime field values
* using ISOChronology in the specified time zone.
*
* If the specified time zone is null, the default zone is used.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @param secondOfMinute the second of the minute, from 0 to 59
* @param zone the time zone, null means default time zone
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
DateTimeZone zone) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, 0, zone);
}
/**
* Constructs an instance from datetime field values
* using the specified chronology.
*
* If the chronology is null, ISOChronology
* in the default time zone is used.
*
* @param year the year, valid values defined by the chronology
* @param monthOfYear the month of the year, valid values defined by the chronology
* @param dayOfMonth the day of the month, valid values defined by the chronology
* @param hourOfDay the hour of the day, valid values defined by the chronology
* @param minuteOfHour the minute of the hour, valid values defined by the chronology
* @param secondOfMinute the second of the minute, valid values defined by the chronology
* @param chronology the chronology, null means ISOChronology in default zone
* @since 2.0
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
Chronology chronology) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, 0, chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from datetime field values
* using ISOChronology in the default time zone.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @param secondOfMinute the second of the minute, from 0 to 59
* @param millisOfSecond the millisecond of the second, from 0 to 999
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
int millisOfSecond) {
super(year, monthOfYear, dayOfMonth, hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond);
}
/**
* Constructs an instance from datetime field values
* using ISOChronology in the specified time zone.
*
* If the specified time zone is null, the default zone is used.
*
* @param year the year
* @param monthOfYear the month of the year, from 1 to 12
* @param dayOfMonth the day of the month, from 1 to 31
* @param hourOfDay the hour of the day, from 0 to 23
* @param minuteOfHour the minute of the hour, from 0 to 59
* @param secondOfMinute the second of the minute, from 0 to 59
* @param millisOfSecond the millisecond of the second, from 0 to 999
* @param zone the time zone, null means default time zone
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
int millisOfSecond,
DateTimeZone zone) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond, zone);
}
/**
* Constructs an instance from datetime field values
* using the specified chronology.
*
* If the chronology is null, ISOChronology
* in the default time zone is used.
*
* @param year the year, valid values defined by the chronology
* @param monthOfYear the month of the year, valid values defined by the chronology
* @param dayOfMonth the day of the month, valid values defined by the chronology
* @param hourOfDay the hour of the day, valid values defined by the chronology
* @param minuteOfHour the minute of the hour, valid values defined by the chronology
* @param secondOfMinute the second of the minute, valid values defined by the chronology
* @param millisOfSecond the millisecond of the second, valid values defined by the chronology
* @param chronology the chronology, null means ISOChronology in default zone
*/
public DateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
int millisOfSecond,
Chronology chronology) {
super(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond, chronology);
}
//-----------------------------------------------------------------------
/**
* Get this object as a DateTime by returning this.
*
* @return this
*/
public DateTime toDateTime() {
return this;
}
/**
* Get this object as a DateTime using ISOChronology in the default zone,
* returning this if possible.
*
* @return a DateTime using the same millis
*/
public DateTime toDateTimeISO() {
if (getChronology() == ISOChronology.getInstance()) {
return this;
}
return super.toDateTimeISO();
}
/**
* Get this object as a DateTime, returning this if possible.
*
* @param zone time zone to apply, or default if null
* @return a DateTime using the same millis
*/
public DateTime toDateTime(DateTimeZone zone) {
zone = DateTimeUtils.getZone(zone);
if (getZone() == zone) {
return this;
}
return super.toDateTime(zone);
}
/**
* Get this object as a DateTime, returning this if possible.
*
* @param chronology chronology to apply, or ISOChronology if null
* @return a DateTime using the same millis
*/
public DateTime toDateTime(Chronology chronology) {
chronology = DateTimeUtils.getChronology(chronology);
if (getChronology() == chronology) {
return this;
}
return super.toDateTime(chronology);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with different millis.
*
* The returned object will be either be a new instance or this.
* Only the millis will change, the chronology and time zone are kept.
*
* @param newMillis the new millis, from 1970-01-01T00:00:00Z
* @return a copy of this datetime with different millis
*/
public DateTime withMillis(long newMillis) {
return (newMillis == getMillis() ? this : new DateTime(newMillis, getChronology()));
}
/**
* Returns a copy of this datetime with a different chronology.
*
* The returned object will be either be a new instance or this.
* Only the chronology will change, the millis are kept.
*
* @param newChronology the new chronology, null means ISO default
* @return a copy of this datetime with a different chronology
*/
public DateTime withChronology(Chronology newChronology) {
newChronology = DateTimeUtils.getChronology(newChronology);
return (newChronology == getChronology() ? this : new DateTime(getMillis(), newChronology));
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with a different time zone, preserving the
* millisecond instant.
*
* This method is useful for finding the local time in another timezone.
* For example, if this instant holds 12:30 in Europe/London, the result
* from this method with Europe/Paris would be 13:30.
*
* The returned object will be a new instance of the same implementation type.
* This method changes the time zone, and does not change the
* millisecond instant, with the effect that the field values usually change.
* The returned object will be either be a new instance or this.
*
* @param newZone the new time zone
* @return a copy of this datetime with a different time zone
* @see #withZoneRetainFields
*/
public DateTime withZone(DateTimeZone newZone) {
return withChronology(getChronology().withZone(newZone));
}
/**
* Returns a copy of this datetime with a different time zone, preserving the
* field values.
*
* This method is useful for finding the millisecond time in another timezone.
* For example, if this instant holds 12:30 in Europe/London (ie. 12:30Z),
* the result from this method with Europe/Paris would be 12:30 (ie. 11:30Z).
*
* The returned object will be a new instance of the same implementation type.
* This method changes the time zone and the millisecond instant to keep
* the field values the same.
* The returned object will be either be a new instance or this.
*
* @param newZone the new time zone, null means default
* @return a copy of this datetime with a different time zone
* @see #withZone
*/
public DateTime withZoneRetainFields(DateTimeZone newZone) {
newZone = DateTimeUtils.getZone(newZone);
DateTimeZone originalZone = DateTimeUtils.getZone(getZone());
if (newZone == originalZone) {
return this;
}
long millis = originalZone.getMillisKeepLocal(newZone, getMillis());
return new DateTime(millis, getChronology().withZone(newZone));
}
/**
* Returns a copy of this ZonedDateTime changing the zone offset to the earlier
* of the two valid offsets at a local time-line overlap.
*
* This method only has any effect when the local time-line overlaps, such as at
* an autumn daylight savings cutover. In this scenario, there are two valid offsets
* for the local date-time. Calling this method will return a date-time with the
* earlier of the two selected.
*
* If this method is called when it is not an overlap, this is returned.
*
* This instance is immutable and unaffected by this method call.
*
* @return a copy of this datetime with the earliest valid offset for the local datetime
*/
public DateTime withEarlierOffsetAtOverlap() {
long newMillis = getZone().adjustOffset(getMillis(), false);
return withMillis(newMillis);
}
/**
* Returns a copy of this ZonedDateTime changing the zone offset to the later
* of the two valid offsets at a local time-line overlap.
*
* This method only has any effect when the local time-line overlaps, such as at
* an autumn daylight savings cutover. In this scenario, there are two valid offsets
* for the local date-time. Calling this method will return a date-time with the
* later of the two selected.
*
* If this method is called when it is not an overlap, this is returned.
*
* This instance is immutable and unaffected by this method call.
*
* @return a copy of this datetime with the latest valid offset for the local datetime
*/
public DateTime withLaterOffsetAtOverlap() {
long newMillis = getZone().adjustOffset(getMillis(), true);
return withMillis(newMillis);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the specified date, retaining the time fields.
*
* If the date is already the date passed in, then this is returned.
*
* To set a single field use the properties, for example:
*
* DateTime set = monthOfYear().setCopy(6);
*
*
* If the time is invalid on the new date due to the time-zone, the time will be adjusted.
*
* This instance is immutable and unaffected by this method call.
*
* @param year the new year value
* @param monthOfYear the new monthOfYear value
* @param dayOfMonth the new dayOfMonth value
* @return a copy of this datetime with a different date
* @throws IllegalArgumentException if any value if invalid
*/
public DateTime withDate(int year, int monthOfYear, int dayOfMonth) {
Chronology chrono = getChronology();
long localInstant = chrono.withUTC().getDateTimeMillis(year, monthOfYear, dayOfMonth, getMillisOfDay());
return withMillis(chrono.getZone().convertLocalToUTC(localInstant, false, getMillis()));
}
/**
* Returns a copy of this datetime with the specified date, retaining the time fields.
*
* If the time is invalid on the new date due to the time-zone, the time will be adjusted.
*
* This instance is immutable and unaffected by this method call.
*
* @param date the local date
* @return a copy of this datetime with a different date
* @throws IllegalArgumentException if the time-of-day is invalid for the date
* @throws NullPointerException if the date is null
*/
public DateTime withDate(LocalDate date) {
return withDate(
date.getYear(), date.getMonthOfYear(), date.getDayOfMonth());
}
/**
* Returns a copy of this datetime with the specified time, retaining the date fields.
*
* If the time is already the time passed in, then this is returned.
*
* To set a single field use the properties, for example:
*
* DateTime set = dt.hourOfDay().setCopy(6);
*
*
* If the new time is invalid due to the time-zone, the time will be adjusted.
*
* This instance is immutable and unaffected by this method call.
*
* @param hourOfDay the hour of the day
* @param minuteOfHour the minute of the hour
* @param secondOfMinute the second of the minute
* @param millisOfSecond the millisecond of the second
* @return a copy of this datetime with a different time
* @throws IllegalArgumentException if any value if invalid
*/
public DateTime withTime(int hourOfDay, int minuteOfHour, int secondOfMinute, int millisOfSecond) {
Chronology chrono = getChronology();
long localInstant = chrono.withUTC().getDateTimeMillis(
getYear(), getMonthOfYear(), getDayOfMonth(), hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond);
return withMillis(chrono.getZone().convertLocalToUTC(localInstant, false, getMillis()));
}
/**
* Returns a copy of this datetime with the specified time, retaining the date fields.
*
* If the new time is invalid due to the time-zone, the time will be adjusted.
*
* This instance is immutable and unaffected by this method call.
*
* @param time the local time
* @return a copy of this datetime with a different time
* @throws IllegalArgumentException if the time-of-day is invalid for the date
* @throws NullPointerException if the time is null
*/
public DateTime withTime(LocalTime time) {
return withTime(
time.getHourOfDay(), time.getMinuteOfHour(), time.getSecondOfMinute(), time.getMillisOfSecond());
}
/**
* Returns a copy of this datetime with the time set to the start of the day.
*
* The time will normally be midnight, as that is the earliest time on
* any given day. However, in some time zones when Daylight Savings Time
* starts, there is no midnight because time jumps from 11:59 to 01:00.
* This method handles that situation by returning 01:00 on that date.
*
* This instance is immutable and unaffected by this method call.
*
* @return a copy of this datetime with the time set to the start of the day, not null
*/
public DateTime withTimeAtStartOfDay() {
return toLocalDate().toDateTimeAtStartOfDay(getZone());
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the partial set of fields replacing those
* from this instance.
*
* For example, if the partial is a TimeOfDay then the time fields
* would be changed in the returned instance.
* If the partial is null, then this is returned.
*
* @param partial the partial set of fields to apply to this datetime, null ignored
* @return a copy of this datetime with a different set of fields
* @throws IllegalArgumentException if any value is invalid
*/
public DateTime withFields(ReadablePartial partial) {
if (partial == null) {
return this;
}
return withMillis(getChronology().set(partial, getMillis()));
}
/**
* Returns a copy of this datetime with the specified field set to a new value.
*
* For example, if the field type is hourOfDay then the hour of day
* field would be changed in the returned instance.
* If the field type is null, then this is returned.
*
* These three lines are equivalent:
*
* DateTime updated = dt.withField(DateTimeFieldType.dayOfMonth(), 6);
* DateTime updated = dt.dayOfMonth().setCopy(6);
* DateTime updated = dt.property(DateTimeFieldType.dayOfMonth()).setCopy(6);
*
*
* @param fieldType the field type to set, not null
* @param value the value to set
* @return a copy of this datetime with the field set
* @throws IllegalArgumentException if the value is null or invalid
*/
public DateTime withField(DateTimeFieldType fieldType, int value) {
if (fieldType == null) {
throw new IllegalArgumentException("Field must not be null");
}
long instant = fieldType.getField(getChronology()).set(getMillis(), value);
return withMillis(instant);
}
/**
* Returns a copy of this datetime with the value of the specified field increased.
*
* If the addition is zero or the field is null, then this is returned.
*
* These three lines are equivalent:
*
* DateTime added = dt.withFieldAdded(DurationFieldType.years(), 6);
* DateTime added = dt.plusYears(6);
* DateTime added = dt.plus(Period.years(6));
*
*
* @param fieldType the field type to add to, not null
* @param amount the amount to add
* @return a copy of this datetime with the field updated
* @throws IllegalArgumentException if the value is null or invalid
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime withFieldAdded(DurationFieldType fieldType, int amount) {
if (fieldType == null) {
throw new IllegalArgumentException("Field must not be null");
}
if (amount == 0) {
return this;
}
long instant = fieldType.getField(getChronology()).add(getMillis(), amount);
return withMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the specified duration added.
*
* If the addition is zero, then this is returned.
*
* @param durationToAdd the duration to add to this one
* @param scalar the amount of times to add, such as -1 to subtract once
* @return a copy of this datetime with the duration added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime withDurationAdded(long durationToAdd, int scalar) {
if (durationToAdd == 0 || scalar == 0) {
return this;
}
long instant = getChronology().add(getMillis(), durationToAdd, scalar);
return withMillis(instant);
}
/**
* Returns a copy of this datetime with the specified duration added.
*
* If the addition is zero, then this is returned.
*
* @param durationToAdd the duration to add to this one, null means zero
* @param scalar the amount of times to add, such as -1 to subtract once
* @return a copy of this datetime with the duration added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime withDurationAdded(ReadableDuration durationToAdd, int scalar) {
if (durationToAdd == null || scalar == 0) {
return this;
}
return withDurationAdded(durationToAdd.getMillis(), scalar);
}
/**
* Returns a copy of this datetime with the specified period added.
*
* If the addition is zero, then this is returned.
*
* This method is typically used to add multiple copies of complex
* period instances. Adding one field is best achieved using methods
* like {@link #withFieldAdded(DurationFieldType, int)}
* or {@link #plusYears(int)}.
*
* @param period the period to add to this one, null means zero
* @param scalar the amount of times to add, such as -1 to subtract once
* @return a copy of this datetime with the period added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime withPeriodAdded(ReadablePeriod period, int scalar) {
if (period == null || scalar == 0) {
return this;
}
long instant = getChronology().add(period, getMillis(), scalar);
return withMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the specified duration added.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param duration the duration, in millis, to add to this one
* @return a copy of this datetime with the duration added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime plus(long duration) {
return withDurationAdded(duration, 1);
}
/**
* Returns a copy of this datetime with the specified duration added.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param duration the duration to add to this one, null means zero
* @return a copy of this datetime with the duration added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime plus(ReadableDuration duration) {
return withDurationAdded(duration, 1);
}
/**
* Returns a copy of this datetime with the specified period added.
*
* This method will add each element of the period one by one, from largest
* to smallest, adjusting the datetime to be accurate between each.
*
* Thus, adding a period of one month and one day to 2007-03-31 will
* work as follows:
* First add one month and adjust, resulting in 2007-04-30
* Then add one day and adjust, resulting in 2007-05-01.
*
* This method is typically used to add complex period instances.
* Adding one field is best achieved using methods
* like {@link #plusYears(int)}.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param period the duration to add to this one, null means zero
* @return a copy of this datetime with the period added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime plus(ReadablePeriod period) {
return withPeriodAdded(period, 1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime plus the specified number of years.
*
* The calculation will do its best to only change the year field
* retaining the same month of year.
* However, in certain circumstances, it may be necessary to alter
* smaller fields. For example, 2008-02-29 plus one year cannot result
* in 2009-02-29, so the day of month is adjusted to 2009-02-28.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusYears(6);
* DateTime added = dt.plus(Period.years(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.years(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param years the amount of years to add, may be negative
* @return the new datetime plus the increased years
* @since 1.1
*/
public DateTime plusYears(int years) {
if (years == 0) {
return this;
}
long instant = getChronology().years().add(getMillis(), years);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of months.
*
* The calculation will do its best to only change the month field
* retaining the same day of month.
* However, in certain circumstances, it may be necessary to alter
* smaller fields. For example, 2007-03-31 plus one month cannot result
* in 2007-04-31, so the day of month is adjusted to 2007-04-30.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusMonths(6);
* DateTime added = dt.plus(Period.months(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.months(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param months the amount of months to add, may be negative
* @return the new datetime plus the increased months
* @since 1.1
*/
public DateTime plusMonths(int months) {
if (months == 0) {
return this;
}
long instant = getChronology().months().add(getMillis(), months);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of weeks.
*
* The calculation operates as if it were adding the equivalent in days.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusWeeks(6);
* DateTime added = dt.plus(Period.weeks(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.weeks(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param weeks the amount of weeks to add, may be negative
* @return the new datetime plus the increased weeks
* @since 1.1
*/
public DateTime plusWeeks(int weeks) {
if (weeks == 0) {
return this;
}
long instant = getChronology().weeks().add(getMillis(), weeks);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of days.
*
* The calculation will do its best to only change the day field
* retaining the same time of day.
* However, in certain circumstances, typically daylight savings cutover,
* it may be necessary to alter the time fields.
*
* In spring an hour is typically removed. If adding one day results in
* the time being within the cutover then the time is adjusted to be
* within summer time. For example, if the cutover is from 01:59 to 03:00
* and the result of this method would have been 02:30, then the result
* will be adjusted to 03:30.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusDays(6);
* DateTime added = dt.plus(Period.days(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.days(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param days the amount of days to add, may be negative
* @return the new datetime plus the increased days
* @since 1.1
*/
public DateTime plusDays(int days) {
if (days == 0) {
return this;
}
long instant = getChronology().days().add(getMillis(), days);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of hours.
*
* The calculation will add a duration equivalent to the number of hours
* expressed in milliseconds.
*
* For example, if a spring daylight savings cutover is from 01:59 to 03:00
* then adding one hour to 01:30 will result in 03:30. This is a duration
* of one hour later, even though the hour field value changed from 1 to 3.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusHours(6);
* DateTime added = dt.plus(Period.hours(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.hours(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param hours the amount of hours to add, may be negative
* @return the new datetime plus the increased hours
* @since 1.1
*/
public DateTime plusHours(int hours) {
if (hours == 0) {
return this;
}
long instant = getChronology().hours().add(getMillis(), hours);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of minutes.
*
* The calculation will add a duration equivalent to the number of minutes
* expressed in milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusMinutes(6);
* DateTime added = dt.plus(Period.minutes(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.minutes(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param minutes the amount of minutes to add, may be negative
* @return the new datetime plus the increased minutes
* @since 1.1
*/
public DateTime plusMinutes(int minutes) {
if (minutes == 0) {
return this;
}
long instant = getChronology().minutes().add(getMillis(), minutes);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of seconds.
*
* The calculation will add a duration equivalent to the number of seconds
* expressed in milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusSeconds(6);
* DateTime added = dt.plus(Period.seconds(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.seconds(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param seconds the amount of seconds to add, may be negative
* @return the new datetime plus the increased seconds
* @since 1.1
*/
public DateTime plusSeconds(int seconds) {
if (seconds == 0) {
return this;
}
long instant = getChronology().seconds().add(getMillis(), seconds);
return withMillis(instant);
}
/**
* Returns a copy of this datetime plus the specified number of millis.
*
* The calculation will add a duration equivalent to the number of milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime added = dt.plusMillis(6);
* DateTime added = dt.plus(Period.millis(6));
* DateTime added = dt.withFieldAdded(DurationFieldType.millis(), 6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param millis the amount of millis to add, may be negative
* @return the new datetime plus the increased millis
* @since 1.1
*/
public DateTime plusMillis(int millis) {
if (millis == 0) {
return this;
}
long instant = getChronology().millis().add(getMillis(), millis);
return withMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the specified duration taken away.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param duration the duration, in millis, to reduce this instant by
* @return a copy of this datetime with the duration taken away
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime minus(long duration) {
return withDurationAdded(duration, -1);
}
/**
* Returns a copy of this datetime with the specified duration taken away.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param duration the duration to reduce this instant by
* @return a copy of this datetime with the duration taken away
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime minus(ReadableDuration duration) {
return withDurationAdded(duration, -1);
}
/**
* Returns a copy of this datetime with the specified period taken away.
*
* This method will subtract each element of the period one by one, from
* largest to smallest, adjusting the datetime to be accurate between each.
*
* Thus, subtracting a period of one month and one day from 2007-05-31 will
* work as follows:
* First subtract one month and adjust, resulting in 2007-04-30
* Then subtract one day and adjust, resulting in 2007-04-29.
* Note that the day has been adjusted by two.
*
* This method is typically used to subtract complex period instances.
* Subtracting one field is best achieved using methods
* like {@link #minusYears(int)}.
*
* If the amount is zero or null, then this is returned.
* This datetime instance is immutable and unaffected by this method call.
*
* @param period the period to reduce this instant by
* @return a copy of this datetime with the period taken away
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public DateTime minus(ReadablePeriod period) {
return withPeriodAdded(period, -1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime minus the specified number of years.
*
* The calculation will do its best to only change the year field
* retaining the same month of year.
* However, in certain circumstances, it may be necessary to alter
* smaller fields. For example, 2008-02-29 minus one year cannot result
* in 2007-02-29, so the day of month is adjusted to 2007-02-28.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusYears(6);
* DateTime subtracted = dt.minus(Period.years(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.years(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param years the amount of years to subtract, may be negative
* @return the new datetime minus the increased years
* @since 1.1
*/
public DateTime minusYears(int years) {
if (years == 0) {
return this;
}
long instant = getChronology().years().subtract(getMillis(), years);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of months.
*
* The calculation will do its best to only change the month field
* retaining the same day of month.
* However, in certain circumstances, it may be necessary to alter
* smaller fields. For example, 2007-05-31 minus one month cannot result
* in 2007-04-31, so the day of month is adjusted to 2007-04-30.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusMonths(6);
* DateTime subtracted = dt.minus(Period.months(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.months(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param months the amount of months to subtract, may be negative
* @return the new datetime minus the increased months
* @since 1.1
*/
public DateTime minusMonths(int months) {
if (months == 0) {
return this;
}
long instant = getChronology().months().subtract(getMillis(), months);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of weeks.
*
* The calculation operates as if it were subtracting the equivalent in days.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusWeeks(6);
* DateTime subtracted = dt.minus(Period.weeks(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.weeks(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param weeks the amount of weeks to subtract, may be negative
* @return the new datetime minus the increased weeks
* @since 1.1
*/
public DateTime minusWeeks(int weeks) {
if (weeks == 0) {
return this;
}
long instant = getChronology().weeks().subtract(getMillis(), weeks);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of days.
*
* The calculation will do its best to only change the day field
* retaining the same time of day.
* However, in certain circumstances, typically daylight savings cutover,
* it may be necessary to alter the time fields.
*
* In spring an hour is typically removed. If subtracting one day results
* in the time being within the cutover then the time is adjusted to be
* within summer time. For example, if the cutover is from 01:59 to 03:00
* and the result of this method would have been 02:30, then the result
* will be adjusted to 03:30.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusDays(6);
* DateTime subtracted = dt.minus(Period.days(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.days(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param days the amount of days to subtract, may be negative
* @return the new datetime minus the increased days
* @since 1.1
*/
public DateTime minusDays(int days) {
if (days == 0) {
return this;
}
long instant = getChronology().days().subtract(getMillis(), days);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of hours.
*
* The calculation will subtract a duration equivalent to the number of
* hours expressed in milliseconds.
*
* For example, if a spring daylight savings cutover is from 01:59 to 03:00
* then subtracting one hour from 03:30 will result in 01:30. This is a
* duration of one hour earlier, even though the hour field value changed
* from 3 to 1.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusHours(6);
* DateTime subtracted = dt.minus(Period.hours(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.hours(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param hours the amount of hours to subtract, may be negative
* @return the new datetime minus the increased hours
* @since 1.1
*/
public DateTime minusHours(int hours) {
if (hours == 0) {
return this;
}
long instant = getChronology().hours().subtract(getMillis(), hours);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of minutes.
*
* The calculation will subtract a duration equivalent to the number of
* minutes expressed in milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusMinutes(6);
* DateTime subtracted = dt.minus(Period.minutes(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.minutes(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param minutes the amount of minutes to subtract, may be negative
* @return the new datetime minus the increased minutes
* @since 1.1
*/
public DateTime minusMinutes(int minutes) {
if (minutes == 0) {
return this;
}
long instant = getChronology().minutes().subtract(getMillis(), minutes);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of seconds.
*
* The calculation will subtract a duration equivalent to the number of
* seconds expressed in milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusSeconds(6);
* DateTime subtracted = dt.minus(Period.seconds(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.seconds(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param seconds the amount of seconds to subtract, may be negative
* @return the new datetime minus the increased seconds
* @since 1.1
*/
public DateTime minusSeconds(int seconds) {
if (seconds == 0) {
return this;
}
long instant = getChronology().seconds().subtract(getMillis(), seconds);
return withMillis(instant);
}
/**
* Returns a copy of this datetime minus the specified number of millis.
*
* The calculation will subtract a duration equivalent to the number of
* milliseconds.
*
* The following three lines are identical in effect:
*
* DateTime subtracted = dt.minusMillis(6);
* DateTime subtracted = dt.minus(Period.millis(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.millis(), -6);
*
*
* This datetime instance is immutable and unaffected by this method call.
*
* @param millis the amount of millis to subtract, may be negative
* @return the new datetime minus the increased millis
* @since 1.1
*/
public DateTime minusMillis(int millis) {
if (millis == 0) {
return this;
}
long instant = getChronology().millis().subtract(getMillis(), millis);
return withMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Gets the property object for the specified type, which contains many useful methods.
*
* @param type the field type to get the chronology for
* @return the property object
* @throws IllegalArgumentException if the field is null or unsupported
*/
public Property property(DateTimeFieldType type) {
if (type == null) {
throw new IllegalArgumentException("The DateTimeFieldType must not be null");
}
DateTimeField field = type.getField(getChronology());
if (field.isSupported() == false) {
throw new IllegalArgumentException("Field '" + type + "' is not supported");
}
return new Property(this, field);
}
//-----------------------------------------------------------------------
/**
* Converts this object to a DateMidnight using the
* same millis and chronology.
*
* @return a DateMidnight using the same millis and chronology
* @deprecated DateMidnight is deprecated
*/
@Deprecated
public DateMidnight toDateMidnight() {
return new DateMidnight(getMillis(), getChronology());
}
/**
* Converts this object to a YearMonthDay using the
* same millis and chronology.
*
* @return a YearMonthDay using the same millis and chronology
* @deprecated Use LocalDate instead of YearMonthDay
*/
@Deprecated
public YearMonthDay toYearMonthDay() {
return new YearMonthDay(getMillis(), getChronology());
}
/**
* Converts this object to a TimeOfDay using the
* same millis and chronology.
*
* @return a TimeOfDay using the same millis and chronology
* @deprecated Use LocalTime instead of TimeOfDay
*/
@Deprecated
public TimeOfDay toTimeOfDay() {
return new TimeOfDay(getMillis(), getChronology());
}
/**
* Converts this object to a LocalDateTime with
* the same datetime and chronology.
*
* @return a LocalDateTime with the same datetime and chronology
* @since 1.3
*/
public LocalDateTime toLocalDateTime() {
return new LocalDateTime(getMillis(), getChronology());
}
/**
* Converts this object to a LocalDate with the
* same date and chronology.
*
* @return a LocalDate with the same date and chronology
* @since 1.3
*/
public LocalDate toLocalDate() {
return new LocalDate(getMillis(), getChronology());
}
/**
* Converts this object to a LocalTime with the
* same time and chronology.
*
* @return a LocalTime with the same time and chronology
* @since 1.3
*/
public LocalTime toLocalTime() {
return new LocalTime(getMillis(), getChronology());
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the era field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* era changed.
*
* @param era the era to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withEra(int era) {
return withMillis(getChronology().era().set(getMillis(), era));
}
/**
* Returns a copy of this datetime with the century of era field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* century of era changed.
*
* @param centuryOfEra the century of era to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withCenturyOfEra(int centuryOfEra) {
return withMillis(getChronology().centuryOfEra().set(getMillis(), centuryOfEra));
}
/**
* Returns a copy of this datetime with the year of era field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* year of era changed.
*
* @param yearOfEra the year of era to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withYearOfEra(int yearOfEra) {
return withMillis(getChronology().yearOfEra().set(getMillis(), yearOfEra));
}
/**
* Returns a copy of this datetime with the year of century field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* year of century changed.
*
* @param yearOfCentury the year of century to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withYearOfCentury(int yearOfCentury) {
return withMillis(getChronology().yearOfCentury().set(getMillis(), yearOfCentury));
}
/**
* Returns a copy of this datetime with the year field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* year changed.
*
* @param year the year to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withYear(int year) {
return withMillis(getChronology().year().set(getMillis(), year));
}
/**
* Returns a copy of this datetime with the weekyear field updated.
*
* The weekyear is the year that matches with the weekOfWeekyear field.
* In the standard ISO8601 week algorithm, the first week of the year
* is that in which at least 4 days are in the year. As a result of this
* definition, day 1 of the first week may be in the previous year.
* The weekyear allows you to query the effective year for that day.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* weekyear changed.
*
* @param weekyear the weekyear to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withWeekyear(int weekyear) {
return withMillis(getChronology().weekyear().set(getMillis(), weekyear));
}
/**
* Returns a copy of this datetime with the month of year field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* month of year changed.
*
* @param monthOfYear the month of year to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withMonthOfYear(int monthOfYear) {
return withMillis(getChronology().monthOfYear().set(getMillis(), monthOfYear));
}
/**
* Returns a copy of this datetime with the week of weekyear field updated.
*
* This field is associated with the "weekyear" via {@link #withWeekyear(int)}.
* In the standard ISO8601 week algorithm, the first week of the year
* is that in which at least 4 days are in the year. As a result of this
* definition, day 1 of the first week may be in the previous year.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* week of weekyear changed.
*
* @param weekOfWeekyear the week of weekyear to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withWeekOfWeekyear(int weekOfWeekyear) {
return withMillis(getChronology().weekOfWeekyear().set(getMillis(), weekOfWeekyear));
}
/**
* Returns a copy of this datetime with the day of year field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* day of year changed.
*
* @param dayOfYear the day of year to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withDayOfYear(int dayOfYear) {
return withMillis(getChronology().dayOfYear().set(getMillis(), dayOfYear));
}
/**
* Returns a copy of this datetime with the day of month field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* day of month changed.
*
* @param dayOfMonth the day of month to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withDayOfMonth(int dayOfMonth) {
return withMillis(getChronology().dayOfMonth().set(getMillis(), dayOfMonth));
}
/**
* Returns a copy of this datetime with the day of week field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* day of week changed.
*
* @param dayOfWeek the day of week to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withDayOfWeek(int dayOfWeek) {
return withMillis(getChronology().dayOfWeek().set(getMillis(), dayOfWeek));
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the hour of day field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* hour of day changed.
*
* @param hour the hour of day to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withHourOfDay(int hour) {
return withMillis(getChronology().hourOfDay().set(getMillis(), hour));
}
/**
* Returns a copy of this datetime with the minute of hour updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* minute of hour changed.
*
* @param minute the minute of hour to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withMinuteOfHour(int minute) {
return withMillis(getChronology().minuteOfHour().set(getMillis(), minute));
}
/**
* Returns a copy of this datetime with the second of minute field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* second of minute changed.
*
* @param second the second of minute to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withSecondOfMinute(int second) {
return withMillis(getChronology().secondOfMinute().set(getMillis(), second));
}
/**
* Returns a copy of this datetime with the millis of second field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* millis of second changed.
*
* @param millis the millis of second to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withMillisOfSecond(int millis) {
return withMillis(getChronology().millisOfSecond().set(getMillis(), millis));
}
/**
* Returns a copy of this datetime with the millis of day field updated.
*
* DateTime is immutable, so there are no set methods.
* Instead, this method returns a new instance with the value of
* millis of day changed.
*
* @param millis the millis of day to set
* @return a copy of this object with the field set
* @throws IllegalArgumentException if the value is invalid
* @since 1.3
*/
public DateTime withMillisOfDay(int millis) {
return withMillis(getChronology().millisOfDay().set(getMillis(), millis));
}
// Date properties
//-----------------------------------------------------------------------
/**
* Get the era property which provides access to advanced functionality.
*
* @return the era property
*/
public Property era() {
return new Property(this, getChronology().era());
}
/**
* Get the century of era property which provides access to advanced functionality.
*
* @return the year of era property
*/
public Property centuryOfEra() {
return new Property(this, getChronology().centuryOfEra());
}
/**
* Get the year of century property which provides access to advanced functionality.
*
* @return the year of era property
*/
public Property yearOfCentury() {
return new Property(this, getChronology().yearOfCentury());
}
/**
* Get the year of era property which provides access to advanced functionality.
*
* @return the year of era property
*/
public Property yearOfEra() {
return new Property(this, getChronology().yearOfEra());
}
/**
* Get the year property which provides access to advanced functionality.
*
* @return the year property
*/
public Property year() {
return new Property(this, getChronology().year());
}
/**
* Get the year of a week based year property which provides access to advanced functionality.
*
* @return the year of a week based year property
*/
public Property weekyear() {
return new Property(this, getChronology().weekyear());
}
/**
* Get the month of year property which provides access to advanced functionality.
*
* @return the month of year property
*/
public Property monthOfYear() {
return new Property(this, getChronology().monthOfYear());
}
/**
* Get the week of a week based year property which provides access to advanced functionality.
*
* @return the week of a week based year property
*/
public Property weekOfWeekyear() {
return new Property(this, getChronology().weekOfWeekyear());
}
/**
* Get the day of year property which provides access to advanced functionality.
*
* @return the day of year property
*/
public Property dayOfYear() {
return new Property(this, getChronology().dayOfYear());
}
/**
* Get the day of month property which provides access to advanced functionality.
*
* @return the day of month property
*/
public Property dayOfMonth() {
return new Property(this, getChronology().dayOfMonth());
}
/**
* Get the day of week property which provides access to advanced functionality.
*
* @return the day of week property
*/
public Property dayOfWeek() {
return new Property(this, getChronology().dayOfWeek());
}
// Time properties
//-----------------------------------------------------------------------
/**
* Get the hour of day field property which provides access to advanced functionality.
*
* @return the hour of day property
*/
public Property hourOfDay() {
return new Property(this, getChronology().hourOfDay());
}
/**
* Get the minute of day property which provides access to advanced functionality.
*
* @return the minute of day property
*/
public Property minuteOfDay() {
return new Property(this, getChronology().minuteOfDay());
}
/**
* Get the minute of hour field property which provides access to advanced functionality.
*
* @return the minute of hour property
*/
public Property minuteOfHour() {
return new Property(this, getChronology().minuteOfHour());
}
/**
* Get the second of day property which provides access to advanced functionality.
*
* @return the second of day property
*/
public Property secondOfDay() {
return new Property(this, getChronology().secondOfDay());
}
/**
* Get the second of minute field property which provides access to advanced functionality.
*
* @return the second of minute property
*/
public Property secondOfMinute() {
return new Property(this, getChronology().secondOfMinute());
}
/**
* Get the millis of day property which provides access to advanced functionality.
*
* @return the millis of day property
*/
public Property millisOfDay() {
return new Property(this, getChronology().millisOfDay());
}
/**
* Get the millis of second property which provides access to advanced functionality.
*
* @return the millis of second property
*/
public Property millisOfSecond() {
return new Property(this, getChronology().millisOfSecond());
}
//-----------------------------------------------------------------------
/**
* DateTime.Property binds a DateTime to a DateTimeField allowing powerful
* datetime functionality to be easily accessed.
*
* The simplest use of this class is as an alternative get method, here used to
* get the year '1972' (as an int) and the month 'December' (as a String).
*
* DateTime dt = new DateTime(1972, 12, 3, 0, 0, 0, 0);
* int year = dt.year().get();
* String monthStr = dt.month().getAsText();
*
*
* Methods are also provided that allow date modification. These return new instances
* of DateTime - they do not modify the original. The example below yields two
* independent immutable date objects 20 years apart.
*
* DateTime dt = new DateTime(1972, 12, 3, 0, 0, 0, 0);
* DateTime dt20 = dt.year().addToCopy(20);
*
* Serious modification of dates (ie. more than just changing one or two fields)
* should use the {@link org.joda.time.MutableDateTime MutableDateTime} class.
*
* DateTime.Propery itself is thread-safe and immutable, as well as the
* DateTime being operated on.
*
* @author Stephen Colebourne
* @author Brian S O'Neill
* @since 1.0
*/
public static final class Property extends AbstractReadableInstantFieldProperty {
/** Serialization version */
private static final long serialVersionUID = -6983323811635733510L;
/** The instant this property is working against */
private DateTime iInstant;
/** The field this property is working against */
private DateTimeField iField;
/**
* Constructor.
*
* @param instant the instant to set
* @param field the field to use
*/
Property(DateTime instant, DateTimeField field) {
super();
iInstant = instant;
iField = field;
}
/**
* Writes the property in a safe serialization format.
*/
private void writeObject(ObjectOutputStream oos) throws IOException {
oos.writeObject(iInstant);
oos.writeObject(iField.getType());
}
/**
* Reads the property from a safe serialization format.
*/
private void readObject(ObjectInputStream oos) throws IOException, ClassNotFoundException {
iInstant = (DateTime) oos.readObject();
DateTimeFieldType type = (DateTimeFieldType) oos.readObject();
iField = type.getField(iInstant.getChronology());
}
//-----------------------------------------------------------------------
/**
* Gets the field being used.
*
* @return the field
*/
public DateTimeField getField() {
return iField;
}
/**
* Gets the milliseconds of the datetime that this property is linked to.
*
* @return the milliseconds
*/
protected long getMillis() {
return iInstant.getMillis();
}
/**
* Gets the chronology of the datetime that this property is linked to.
*
* @return the chronology
* @since 1.4
*/
protected Chronology getChronology() {
return iInstant.getChronology();
}
/**
* Gets the datetime being used.
*
* @return the datetime
*/
public DateTime getDateTime() {
return iInstant;
}
//-----------------------------------------------------------------------
/**
* Adds to this field in a copy of this DateTime.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param value the value to add to the field in the copy
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateTime addToCopy(int value) {
return iInstant.withMillis(iField.add(iInstant.getMillis(), value));
}
/**
* Adds to this field in a copy of this DateTime.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param value the value to add to the field in the copy
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateTime addToCopy(long value) {
return iInstant.withMillis(iField.add(iInstant.getMillis(), value));
}
/**
* Adds to this field, possibly wrapped, in a copy of this DateTime.
* A wrapped operation only changes this field.
* Thus 31st January addWrapField one day goes to the 1st January.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param value the value to add to the field in the copy
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateTime addWrapFieldToCopy(int value) {
return iInstant.withMillis(iField.addWrapField(iInstant.getMillis(), value));
}
//-----------------------------------------------------------------------
/**
* Sets this field in a copy of the DateTime.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param value the value to set the field in the copy to
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateTime setCopy(int value) {
return iInstant.withMillis(iField.set(iInstant.getMillis(), value));
}
/**
* Sets this field in a copy of the DateTime to a parsed text value.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param text the text value to set
* @param locale optional locale to use for selecting a text symbol
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public DateTime setCopy(String text, Locale locale) {
return iInstant.withMillis(iField.set(iInstant.getMillis(), text, locale));
}
/**
* Sets this field in a copy of the DateTime to a parsed text value.
*
* The DateTime attached to this property is unchanged by this call.
* This operation is faster than converting a DateTime to a MutableDateTime
* and back again when setting one field. When setting multiple fields,
* it is generally quicker to make the conversion to MutableDateTime.
*
* @param text the text value to set
* @return a copy of the DateTime with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public DateTime setCopy(String text) {
return setCopy(text, null);
}
//-----------------------------------------------------------------------
/**
* Returns a new DateTime with this field set to the maximum value
* for this field.
*
* This operation is useful for obtaining a DateTime on the last day
* of the month, as month lengths vary.
*
* DateTime lastDayOfMonth = dt.dayOfMonth().withMaximumValue();
*
*
* Where possible, the offset from UTC will be retained, thus applications
* may need to call {@link DateTime#withLaterOffsetAtOverlap()} on the result
* to force the later time during a DST overlap if desired.
*
* From v2.2, this method handles a daylight savings time gap, setting the
* time to the last instant before the gap.
*
* The DateTime attached to this property is unchanged by this call.
*
* @return a copy of the DateTime with this field set to its maximum
* @since 1.2
*/
public DateTime withMaximumValue() {
try {
return setCopy(getMaximumValue());
} catch (RuntimeException ex) {
if (IllegalInstantException.isIllegalInstant(ex)) {
// adding MILLIS_PER_DAY is not perfect, but will work in almost all situations
long beforeGap = getChronology().getZone().previousTransition(getMillis() + DateTimeConstants.MILLIS_PER_DAY);
return new DateTime(beforeGap, getChronology());
}
throw ex;
}
}
/**
* Returns a new DateTime with this field set to the minimum value
* for this field.
*
* Where possible, the offset from UTC will be retained, thus applications
* may need to call {@link DateTime#withEarlierOffsetAtOverlap()} on the result
* to force the earlier time during a DST overlap if desired.
*
* From v2.2, this method handles a daylight savings time gap, setting the
* time to the first instant after the gap.
*
* The DateTime attached to this property is unchanged by this call.
*
* @return a copy of the DateTime with this field set to its minimum
* @since 1.2
*/
public DateTime withMinimumValue() {
try {
return setCopy(getMinimumValue());
} catch (RuntimeException ex) {
if (IllegalInstantException.isIllegalInstant(ex)) {
// subtracting MILLIS_PER_DAY is not perfect, but will work in almost all situations
long afterGap = getChronology().getZone().nextTransition(getMillis() - DateTimeConstants.MILLIS_PER_DAY);
return new DateTime(afterGap, getChronology());
}
throw ex;
}
}
//-----------------------------------------------------------------------
/**
* Rounds to the lowest whole unit of this field on a copy of this DateTime.
*
* @return a copy of the DateTime with the field value changed
*/
public DateTime roundFloorCopy() {
return iInstant.withMillis(iField.roundFloor(iInstant.getMillis()));
}
/**
* Rounds to the highest whole unit of this field on a copy of this DateTime.
*
* @return a copy of the DateTime with the field value changed
*/
public DateTime roundCeilingCopy() {
return iInstant.withMillis(iField.roundCeiling(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this DateTime,
* favoring the floor if halfway.
*
* @return a copy of the DateTime with the field value changed
*/
public DateTime roundHalfFloorCopy() {
return iInstant.withMillis(iField.roundHalfFloor(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this DateTime,
* favoring the ceiling if halfway.
*
* @return a copy of the DateTime with the field value changed
*/
public DateTime roundHalfCeilingCopy() {
return iInstant.withMillis(iField.roundHalfCeiling(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this
* DateTime. If halfway, the ceiling is favored over the floor only if
* it makes this field's value even.
*
* @return a copy of the DateTime with the field value changed
*/
public DateTime roundHalfEvenCopy() {
return iInstant.withMillis(iField.roundHalfEven(iInstant.getMillis()));
}
}
}