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vanadium / third_party / f3f8ecf501af34dcff5dc09ab99fbc11aab47945 / . / java / joda-time-2.3 / src / main / java / org / joda / time / DateMidnight.java
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/*
* Copyright 2001-2013 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.field.AbstractReadableInstantFieldProperty;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
/**
* DateMidnight defines a date where the time component is fixed at midnight.
* The class uses a time zone, thus midnight is local unless a UTC time zone is used.
* <p>
* It is important to emphasise that this class represents the time of midnight on
* any given day.
* Note that midnight is defined as 00:00, which is at the very start of a day.
* <p>
* This class does not represent a day, but the millisecond instant at midnight.
* If you need a class that represents the whole day, then an {@link Interval} or
* a {@link LocalDate} may be more suitable.
* <p>
* This class uses a Chronology internally. The Chronology determines how the
* millisecond instant value is converted into the date time fields.
* The default Chronology is <code>ISOChronology</code> which is the agreed
* international standard and compatable with the modern Gregorian calendar.
*
* <p>Each individual field can be queried in two ways:
* <ul>
* <li><code>getDayOfMonth()</code>
* <li><code>dayOfMonth().get()</code>
* </ul>
* The second technique also provides access to other useful methods on the
* field:
* <ul>
* <li>numeric value
* <li>text value
* <li>short text value
* <li>maximum/minimum values
* <li>add/subtract
* <li>set
* <li>rounding
* </ul>
*
* <p>
* DateMidnight 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
* @since 1.0
* @deprecated The time of midnight does not exist in some time zones
* where the daylight saving time forward shift skips the midnight hour.
* Use {@link LocalDate} to represent a date without a time zone.
* Or use {@link DateTime} to represent a full date and time, perhaps
* using {@link DateTime#withTimeAtStartOfDay()} to get an instant at the
* start of a day.
*/
@Deprecated
public final class DateMidnight
extends BaseDateTime
implements ReadableDateTime, Serializable {
/** Serialization lock */
private static final long serialVersionUID = 156371964018738L;
//-----------------------------------------------------------------------
/**
* Obtains a {@code DateMidnight} set to the current system millisecond time
* using <code>ISOChronology</code> in the default time zone.
* The constructed object will have a local time of midnight.
*
* @return the current date, not null
* @since 2.0
*/
public static DateMidnight now() {
return new DateMidnight();
}
/**
* Obtains a {@code DateMidnight} set to the current system millisecond time
* using <code>ISOChronology</code> in the specified time zone.
* The constructed object will have a local time of midnight.
*
* @param zone the time zone, not null
* @return the current date, not null
* @since 2.0
*/
public static DateMidnight now(DateTimeZone zone) {
if (zone == null) {
throw new NullPointerException("Zone must not be null");
}
return new DateMidnight(zone);
}
/**
* Obtains a {@code DateMidnight} set to the current system millisecond time
* using the specified chronology.
* The constructed object will have a local time of midnight.
*
* @param chronology the chronology, not null
* @return the current date, not null
* @since 2.0
*/
public static DateMidnight now(Chronology chronology) {
if (chronology == null) {
throw new NullPointerException("Chronology must not be null");
}
return new DateMidnight(chronology);
}
//-----------------------------------------------------------------------
/**
* Parses a {@code DateMidnight} from the specified string.
* <p>
* This uses {@link ISODateTimeFormat#dateTimeParser()}.
*
* @param str the string to parse, not null
* @since 2.0
*/
@FromString
public static DateMidnight parse(String str) {
return parse(str, ISODateTimeFormat.dateTimeParser().withOffsetParsed());
}
/**
* Parses a {@code DateMidnight} 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 DateMidnight parse(String str, DateTimeFormatter formatter) {
return formatter.parseDateTime(str).toDateMidnight();
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the current system millisecond time
* using <code>ISOChronology</code> in the default time zone.
* The constructed object will have a local time of midnight.
*
* @see #now()
*/
public DateMidnight() {
super();
}
/**
* Constructs an instance set to the current system millisecond time
* using <code>ISOChronology</code> in the specified time zone.
* The constructed object will have a local time of midnight.
* <p>
* 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 DateMidnight(DateTimeZone zone) {
super(zone);
}
/**
* Constructs an instance set to the current system millisecond time
* using the specified chronology.
* The constructed object will have a local time of midnight.
* <p>
* If the chronology is null, <code>ISOChronology</code>
* in the default time zone is used.
*
* @param chronology the chronology, null means ISOChronology in default zone
* @see #now(Chronology)
*/
public DateMidnight(Chronology chronology) {
super(chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using <code>ISOChronology</code> in the default time zone.
* The constructed object will have a local time of midnight.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
*/
public DateMidnight(long instant) {
super(instant);
}
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using <code>ISOChronology</code> in the specified time zone.
* The constructed object will have a local time of midnight.
* <p>
* 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 DateMidnight(long instant, DateTimeZone zone) {
super(instant, zone);
}
/**
* Constructs an instance set to the milliseconds from 1970-01-01T00:00:00Z
* using the specified chronology.
* The constructed object will have a local time of midnight.
* <p>
* If the chronology is null, <code>ISOChronology</code>
* 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 DateMidnight(long instant, Chronology chronology) {
super(instant, chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from an Object that represents a datetime.
* The constructed object will have a local time of midnight.
* <p>
* 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.
* <p>
* 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 DateMidnight(Object instant) {
super(instant, (Chronology) null);
}
/**
* Constructs an instance from an Object that represents a datetime,
* forcing the time zone to that specified.
* The constructed object will have a local time of midnight.
* <p>
* 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.
* <p>
* 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 DateMidnight(Object instant, DateTimeZone zone) {
super(instant, zone);
}
/**
* Constructs an instance from an Object that represents a datetime,
* using the specified chronology.
* The constructed object will have a local time of midnight.
* <p>
* 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.
* <p>
* 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 ISOChronology in default zone
* @throws IllegalArgumentException if the instant is invalid
*/
public DateMidnight(Object instant, Chronology chronology) {
super(instant, DateTimeUtils.getChronology(chronology));
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from datetime field values
* using <code>ISOChronology</code> in the default time zone.
* The constructed object will have a local time of midnight.
*
* @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
*/
public DateMidnight(int year, int monthOfYear, int dayOfMonth) {
super(year, monthOfYear, dayOfMonth, 0, 0, 0, 0);
}
/**
* Constructs an instance from datetime field values
* using <code>ISOChronology</code> in the specified time zone.
* The constructed object will have a local time of midnight.
* <p>
* 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 zone the time zone, null means default time zone
*/
public DateMidnight(int year, int monthOfYear, int dayOfMonth, DateTimeZone zone) {
super(year, monthOfYear, dayOfMonth, 0, 0, 0, 0, zone);
}
/**
* Constructs an instance from datetime field values
* using the specified chronology.
* The constructed object will have a local time of midnight.
* <p>
* If the chronology is null, <code>ISOChronology</code>
* 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 chronology the chronology, null means ISOChronology in default zone
*/
public DateMidnight(int year, int monthOfYear, int dayOfMonth, Chronology chronology) {
super(year, monthOfYear, dayOfMonth, 0, 0, 0, 0, chronology);
}
/**
* Rounds the specified instant to midnight.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z to round
* @param chronology the chronology to use, not null
* @return the updated instant, rounded to midnight
*/
protected long checkInstant(long instant, Chronology chronology) {
return chronology.dayOfMonth().roundFloor(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date with a different millisecond instant.
* The returned object will have a local time of midnight.
* <p>
* Only the millis will change, the chronology and time zone are kept.
* The returned object will be either be a new instance or <code>this</code>.
*
* @param newMillis the new millis, from 1970-01-01T00:00:00Z
* @return a copy of this instant with different millis
*/
public DateMidnight withMillis(long newMillis) {
Chronology chrono = getChronology();
newMillis = checkInstant(newMillis, chrono);
return (newMillis == getMillis() ? this : new DateMidnight(newMillis, chrono));
}
/**
* Returns a copy of this date with a different chronology, potentially
* changing the day in unexpected ways.
* <p>
* This method creates a new DateMidnight using the midnight millisecond value
* and the new chronology. If the same or similar chronology is specified, but
* with a different time zone, the day may change. This occurs because the new
* DateMidnight rounds down the millisecond value to get to midnight, and the
* time zone change may result in a rounding down to a different day.
* <p>
* For example, changing time zone from London (+00:00) to Paris (+01:00) will
* retain the same day, but changing from Paris to London will change the day.
* (When its midnight in London its the same day in Paris, but when its midnight
* in Paris its still the previous day in London)
* <p>
* To avoid these unusual effects, use {@link #withZoneRetainFields(DateTimeZone)}
* to change time zones.
*
* @param newChronology the new chronology
* @return a copy of this instant with a different chronology
*/
public DateMidnight withChronology(Chronology newChronology) {
return (newChronology == getChronology() ? this : new DateMidnight(getMillis(), newChronology));
}
/**
* Returns a copy of this date with a different time zone, preserving the day
* The returned object will have a local time of midnight in the new zone on
* the same day as the original instant.
*
* @param newZone the new time zone, null means default
* @return a copy of this instant with a different time zone
*/
public DateMidnight 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 DateMidnight(millis, getChronology().withZone(newZone));
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date with the partial set of fields replacing those
* from this instance.
* <p>
* For example, if the partial is a <code>LocalDate</code> then the date fields
* would be changed in the returned instance.
* If the partial is null, then <code>this</code> 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 DateMidnight withFields(ReadablePartial partial) {
if (partial == null) {
return this;
}
return withMillis(getChronology().set(partial, getMillis()));
}
/**
* Returns a copy of this date with the specified field set to a new value.
* <p>
* For example, if the field type is <code>dayOfMonth</code> then the day of month
* field would be changed in the returned instance.
* If the field type is null, then <code>this</code> is returned.
* <p>
* These three lines are equivalent:
* <pre>
* DateTime updated = dt.withField(DateTimeFieldType.dayOfMonth(), 6);
* DateTime updated = dt.dayOfMonth().setCopy(6);
* DateTime updated = dt.property(DateTimeFieldType.dayOfMonth()).setCopy(6);
* </pre>
*
* @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 DateMidnight 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 date with the value of the specified field increased.
* <p>
* If the addition is zero or the field is null, then <code>this</code> is returned.
* <p>
* These three lines are equivalent:
* <pre>
* DateMidnight added = dt.withFieldAdded(DateTimeFieldType.year(), 6);
* DateMidnight added = dt.plusYears(6);
* DateMidnight added = dt.year().addToCopy(6);
* </pre>
*
* @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 DateMidnight 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 date with the specified duration added.
* <p>
* If the addition is zero, then <code>this</code> 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 DateMidnight 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 date with the specified duration added.
* <p>
* If the addition is zero, then <code>this</code> 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 DateMidnight withDurationAdded(ReadableDuration durationToAdd, int scalar) {
if (durationToAdd == null || scalar == 0) {
return this;
}
return withDurationAdded(durationToAdd.getMillis(), scalar);
}
/**
* Returns a copy of this date with the specified period added.
* <p>
* If the addition is zero, then <code>this</code> is returned.
* <p>
* 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 DateMidnight 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 date with the specified duration added.
* <p>
* If the amount is zero, then <code>this</code> is returned.
*
* @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 DateMidnight plus(long duration) {
return withDurationAdded(duration, 1);
}
/**
* Returns a copy of this date with the specified duration added.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
*
* @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 DateMidnight plus(ReadableDuration duration) {
return withDurationAdded(duration, 1);
}
/**
* Returns a copy of this date with the specified period added.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
* <p>
* This method is typically used to add complex period instances.
* Adding one field is best achieved using methods
* like {@link #plusYears(int)}.
*
* @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 DateMidnight plus(ReadablePeriod period) {
return withPeriodAdded(period, 1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date plus the specified number of years.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight added = dt.plusYears(6);
* DateMidnight added = dt.plus(Period.years(6));
* DateMidnight added = dt.withFieldAdded(DurationFieldType.years(), 6);
* </pre>
*
* @param years the amount of years to add, may be negative
* @return the new datetime plus the increased years
* @since 1.1
*/
public DateMidnight plusYears(int years) {
if (years == 0) {
return this;
}
long instant = getChronology().years().add(getMillis(), years);
return withMillis(instant);
}
/**
* Returns a copy of this date plus the specified number of months.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight added = dt.plusMonths(6);
* DateMidnight added = dt.plus(Period.months(6));
* DateMidnight added = dt.withFieldAdded(DurationFieldType.months(), 6);
* </pre>
*
* @param months the amount of months to add, may be negative
* @return the new datetime plus the increased months
* @since 1.1
*/
public DateMidnight plusMonths(int months) {
if (months == 0) {
return this;
}
long instant = getChronology().months().add(getMillis(), months);
return withMillis(instant);
}
/**
* Returns a copy of this date plus the specified number of weeks.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight added = dt.plusWeeks(6);
* DateMidnight added = dt.plus(Period.weeks(6));
* DateMidnight added = dt.withFieldAdded(DurationFieldType.weeks(), 6);
* </pre>
*
* @param weeks the amount of weeks to add, may be negative
* @return the new datetime plus the increased weeks
* @since 1.1
*/
public DateMidnight plusWeeks(int weeks) {
if (weeks == 0) {
return this;
}
long instant = getChronology().weeks().add(getMillis(), weeks);
return withMillis(instant);
}
/**
* Returns a copy of this date plus the specified number of days.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight added = dt.plusDays(6);
* DateMidnight added = dt.plus(Period.days(6));
* DateMidnight added = dt.withFieldAdded(DurationFieldType.days(), 6);
* </pre>
*
* @param days the amount of days to add, may be negative
* @return the new datetime plus the increased days
* @since 1.1
*/
public DateMidnight plusDays(int days) {
if (days == 0) {
return this;
}
long instant = getChronology().days().add(getMillis(), days);
return withMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date with the specified duration taken away.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
*
* @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 DateMidnight minus(long duration) {
return withDurationAdded(duration, -1);
}
/**
* Returns a copy of this date with the specified duration taken away.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
*
* @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 DateMidnight minus(ReadableDuration duration) {
return withDurationAdded(duration, -1);
}
/**
* Returns a copy of this date with the specified period taken away.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
* <p>
* This method is typically used to subtract complex period instances.
* Subtracting one field is best achieved using methods
* like {@link #minusYears(int)}.
*
* @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 DateMidnight minus(ReadablePeriod period) {
return withPeriodAdded(period, -1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date minus the specified number of years.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateTime subtracted = dt.minusYears(6);
* DateTime subtracted = dt.minus(Period.years(6));
* DateTime subtracted = dt.withFieldAdded(DurationFieldType.years(), -6);
* </pre>
*
* @param years the amount of years to subtract, may be negative
* @return the new datetime minus the increased years
* @since 1.1
*/
public DateMidnight minusYears(int years) {
if (years == 0) {
return this;
}
long instant = getChronology().years().subtract(getMillis(), years);
return withMillis(instant);
}
/**
* Returns a copy of this date minus the specified number of months.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight subtracted = dt.minusMonths(6);
* DateMidnight subtracted = dt.minus(Period.months(6));
* DateMidnight subtracted = dt.withFieldAdded(DurationFieldType.months(), -6);
* </pre>
*
* @param months the amount of months to subtract, may be negative
* @return the new datetime minus the increased months
* @since 1.1
*/
public DateMidnight minusMonths(int months) {
if (months == 0) {
return this;
}
long instant = getChronology().months().subtract(getMillis(), months);
return withMillis(instant);
}
/**
* Returns a copy of this date minus the specified number of weeks.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight subtracted = dt.minusWeeks(6);
* DateMidnight subtracted = dt.minus(Period.weeks(6));
* DateMidnight subtracted = dt.withFieldAdded(DurationFieldType.weeks(), -6);
* </pre>
*
* @param weeks the amount of weeks to subtract, may be negative
* @return the new datetime minus the increased weeks
* @since 1.1
*/
public DateMidnight minusWeeks(int weeks) {
if (weeks == 0) {
return this;
}
long instant = getChronology().weeks().subtract(getMillis(), weeks);
return withMillis(instant);
}
/**
* Returns a copy of this date minus the specified number of days.
* <p>
* This datetime instance is immutable and unaffected by this method call.
* <p>
* The following three lines are identical in effect:
* <pre>
* DateMidnight subtracted = dt.minusDays(6);
* DateMidnight subtracted = dt.minus(Period.days(6));
* DateMidnight subtracted = dt.withFieldAdded(DurationFieldType.days(), -6);
* </pre>
*
* @param days the amount of days to subtract, may be negative
* @return the new datetime minus the increased days
* @since 1.1
*/
public DateMidnight minusDays(int days) {
if (days == 0) {
return this;
}
long instant = getChronology().days().subtract(getMillis(), days);
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 <code>YearMonthDay</code> using the
* same date 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 <code>LocalDate</code> 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 an <code>Interval</code> encompassing
* the whole of this day.
* <p>
* The interval starts at midnight 00:00 and ends at 00:00 the following day,
* (which is not included in the interval, as intervals are half-open).
*
* @return an interval over the day
*/
public Interval toInterval() {
Chronology chrono = getChronology();
long start = getMillis();
long end = DurationFieldType.days().getField(chrono).add(start, 1);
return new Interval(start, end, chrono);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this date with the era field updated.
* <p>
* DateMidnight 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 DateMidnight withEra(int era) {
return withMillis(getChronology().era().set(getMillis(), era));
}
/**
* Returns a copy of this date with the century of era field updated.
* <p>
* DateMidnight 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 centurey 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 DateMidnight withCenturyOfEra(int centuryOfEra) {
return withMillis(getChronology().centuryOfEra().set(getMillis(), centuryOfEra));
}
/**
* Returns a copy of this date with the year of era field updated.
* <p>
* DateMidnight 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 DateMidnight withYearOfEra(int yearOfEra) {
return withMillis(getChronology().yearOfEra().set(getMillis(), yearOfEra));
}
/**
* Returns a copy of this date with the year of century field updated.
* <p>
* DateMidnight 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 DateMidnight withYearOfCentury(int yearOfCentury) {
return withMillis(getChronology().yearOfCentury().set(getMillis(), yearOfCentury));
}
/**
* Returns a copy of this date with the year field updated.
* <p>
* DateMidnight 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 DateMidnight withYear(int year) {
return withMillis(getChronology().year().set(getMillis(), year));
}
/**
* Returns a copy of this date with the weekyear field updated.
* <p>
* 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.
* <p>
* DateMidnight 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 DateMidnight withWeekyear(int weekyear) {
return withMillis(getChronology().weekyear().set(getMillis(), weekyear));
}
/**
* Returns a copy of this date with the month of year field updated.
* <p>
* DateMidnight 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 DateMidnight withMonthOfYear(int monthOfYear) {
return withMillis(getChronology().monthOfYear().set(getMillis(), monthOfYear));
}
/**
* Returns a copy of this date with the week of weekyear field updated.
* <p>
* 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.
* <p>
* DateMidnight 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 DateMidnight withWeekOfWeekyear(int weekOfWeekyear) {
return withMillis(getChronology().weekOfWeekyear().set(getMillis(), weekOfWeekyear));
}
/**
* Returns a copy of this date with the day of year field updated.
* <p>
* DateMidnight 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 DateMidnight withDayOfYear(int dayOfYear) {
return withMillis(getChronology().dayOfYear().set(getMillis(), dayOfYear));
}
/**
* Returns a copy of this date with the day of month field updated.
* <p>
* DateMidnight 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 DateMidnight withDayOfMonth(int dayOfMonth) {
return withMillis(getChronology().dayOfMonth().set(getMillis(), dayOfMonth));
}
/**
* Returns a copy of this date with the day of week field updated.
* <p>
* DateMidnight 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 DateMidnight withDayOfWeek(int dayOfWeek) {
return withMillis(getChronology().dayOfWeek().set(getMillis(), dayOfWeek));
}
// 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());
}
//-----------------------------------------------------------------------
/**
* DateMidnight.Property binds a DateMidnight to a DateTimeField allowing powerful
* datetime functionality to be easily accessed.
* <p>
* 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).
* <pre>
* DateMidnight dt = new DateMidnight(1972, 12, 3);
* int year = dt.year().get();
* String monthStr = dt.monthOfYear().getAsText();
* </pre>
* <p>
* Methods are also provided that allow date modification. These return new instances
* of DateMidnight - they do not modify the original. The example below yields two
* independent immutable date objects 20 years apart.
* <pre>
* DateMidnight dt = new DateMidnight(1972, 12, 3);
* DateMidnight dt20 = dt.year().addToCopy(20);
* </pre>
* Serious modification of dates (ie. more than just changing one or two fields)
* should use the {@link org.joda.time.MutableDateTime MutableDateTime} class.
* <p>
* DateMidnight.Property itself is thread-safe and immutable.
*
* @author Stephen Colebourne
* @author Brian S O'Neill
* @since 1.0
*/
public static final class Property extends AbstractReadableInstantFieldProperty {
/** Serialization lock */
private static final long serialVersionUID = 257629620L;
/** The instant this property is working against */
private DateMidnight 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(DateMidnight 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 = (DateMidnight) 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 DateMidnight getDateMidnight() {
return iInstant;
}
//-----------------------------------------------------------------------
/**
* Adds to this field in a copy of this DateMidnight.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateMidnight addToCopy(int value) {
return iInstant.withMillis(iField.add(iInstant.getMillis(), value));
}
/**
* Adds to this field in a copy of this DateMidnight.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateMidnight addToCopy(long value) {
return iInstant.withMillis(iField.add(iInstant.getMillis(), value));
}
/**
* Adds to this field, possibly wrapped, in a copy of this DateMidnight.
* A wrapped operation only changes this field.
* Thus 31st January addWrapField one day goes to the 1st January.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateMidnight addWrapFieldToCopy(int value) {
return iInstant.withMillis(iField.addWrapField(iInstant.getMillis(), value));
}
//-----------------------------------------------------------------------
/**
* Sets this field in a copy of the DateMidnight.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public DateMidnight setCopy(int value) {
return iInstant.withMillis(iField.set(iInstant.getMillis(), value));
}
/**
* Sets this field in a copy of the DateMidnight to a parsed text value.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public DateMidnight setCopy(String text, Locale locale) {
return iInstant.withMillis(iField.set(iInstant.getMillis(), text, locale));
}
/**
* Sets this field in a copy of the DateMidnight to a parsed text value.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
* This operation is faster than converting a DateMidnight 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 DateMidnight with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public DateMidnight setCopy(String text) {
return setCopy(text, null);
}
//-----------------------------------------------------------------------
/**
* Returns a new DateMidnight with this field set to the maximum value
* for this field.
* <p>
* This operation is useful for obtaining a DateTime on the last day
* of the month, as month lengths vary.
* <pre>
* DateMidnight lastDayOfMonth = dt.dayOfMonth().withMaximumValue();
* </pre>
* <p>
* The DateMidnight attached to this property is unchanged by this call.
*
* @return a copy of the DateMidnight with this field set to its maximum
* @since 1.2
*/
public DateMidnight withMaximumValue() {
return setCopy(getMaximumValue());
}
/**
* Returns a new DateMidnight with this field set to the minimum value
* for this field.
* <p>
* The DateMidnight attached to this property is unchanged by this call.
*
* @return a copy of the DateMidnight with this field set to its minimum
* @since 1.2
*/
public DateMidnight withMinimumValue() {
return setCopy(getMinimumValue());
}
//-----------------------------------------------------------------------
/**
* Rounds to the lowest whole unit of this field on a copy of this DateMidnight.
*
* @return a copy of the DateMidnight with the field value changed
*/
public DateMidnight roundFloorCopy() {
return iInstant.withMillis(iField.roundFloor(iInstant.getMillis()));
}
/**
* Rounds to the highest whole unit of this field on a copy of this DateMidnight.
*
* @return a copy of the DateMidnight with the field value changed
*/
public DateMidnight roundCeilingCopy() {
return iInstant.withMillis(iField.roundCeiling(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this DateMidnight,
* favoring the floor if halfway.
*
* @return a copy of the DateMidnight with the field value changed
*/
public DateMidnight roundHalfFloorCopy() {
return iInstant.withMillis(iField.roundHalfFloor(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this DateMidnight,
* favoring the ceiling if halfway.
*
* @return a copy of the DateMidnight with the field value changed
*/
public DateMidnight roundHalfCeilingCopy() {
return iInstant.withMillis(iField.roundHalfCeiling(iInstant.getMillis()));
}
/**
* Rounds to the nearest whole unit of this field on a copy of this DateMidnight.
* If halfway, the ceiling is favored over the floor only if it makes this field's value even.
*
* @return a copy of the DateMidnight with the field value changed
*/
public DateMidnight roundHalfEvenCopy() {
return iInstant.withMillis(iField.roundHalfEven(iInstant.getMillis()));
}
}
}