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LocalDateTime_979.java
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2390 lines (2240 loc) · 89.5 KB
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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.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import org.joda.convert.FromString;
import org.joda.convert.ToString;
import org.joda.time.base.BaseLocal;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.convert.ConverterManager;
import org.joda.time.convert.PartialConverter;
import org.joda.time.field.AbstractReadableInstantFieldProperty;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
/**
* LocalDateTime is an unmodifiable datetime class representing a
* datetime without a time zone.
* <p>
* LocalDateTime implements the {@link ReadablePartial} interface.
* To do this, certain methods focus on key fields Year, MonthOfYear,
* DayOfYear and MillisOfDay.
* However, <b>all</b> fields may in fact be queried.
* <p>
* Internally, LocalDateTime uses a single millisecond-based value to
* represent the local datetime. This value is only used internally and
* is not exposed to applications.
* <p>
* Calculations on LocalDateTime are performed using a {@link Chronology}.
* This chronology will be set internally to be in the UTC time zone
* for all calculations.
*
* <p>Each individual field can be queried in two ways:
* <ul>
* <li><code>getHourOfDay()</code>
* <li><code>hourOfDay().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>
* LocalDateTime 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 1.3
*/
public final class LocalDateTime
extends BaseLocal
implements ReadablePartial, Serializable {
/** Serialization lock */
private static final long serialVersionUID = -268716875315837168L;
/** The index of the year field in the field array */
private static final int YEAR = 0;
/** The index of the monthOfYear field in the field array */
private static final int MONTH_OF_YEAR = 1;
/** The index of the dayOfMonth field in the field array */
private static final int DAY_OF_MONTH = 2;
/** The index of the millis field in the field array */
private static final int MILLIS_OF_DAY = 3;
/** The local millis from 1970-01-01T00:00:00 */
private final long iLocalMillis;
/** The chronology to use in UTC */
private final Chronology iChronology;
//-----------------------------------------------------------------------
/**
* Obtains a {@code LocalDateTime} set to the current system millisecond time
* using <code>ISOChronology</code> in the default time zone.
* The resulting object does not use the zone.
*
* @return the current date, not null
* @since 2.0
*/
public static LocalDateTime now() {
return new LocalDateTime();
}
/**
* Obtains a {@code LocalDateTime} set to the current system millisecond time
* using <code>ISOChronology</code> in the specified time zone.
* The resulting object does not use the zone.
*
* @param zone the time zone, not null
* @return the current date, not null
* @since 2.0
*/
public static LocalDateTime now(DateTimeZone zone) {
if (zone == null) {
throw new NullPointerException("Zone must not be null");
}
return new LocalDateTime(zone);
}
/**
* Obtains a {@code LocalDateTime} set to the current system millisecond time
* using the specified chronology.
* The resulting object does not use the zone.
*
* @param chronology the chronology, not null
* @return the current date, not null
* @since 2.0
*/
public static LocalDateTime now(Chronology chronology) {
if (chronology == null) {
throw new NullPointerException("Chronology must not be null");
}
return new LocalDateTime(chronology);
}
//-----------------------------------------------------------------------
/**
* Parses a {@code LocalDateTime} from the specified string.
* <p>
* This uses {@link ISODateTimeFormat#localDateOptionalTimeParser()}.
*
* @param str the string to parse, not null
* @since 2.0
*/
@FromString
public static LocalDateTime parse(String str) {
return parse(str, ISODateTimeFormat.localDateOptionalTimeParser());
}
/**
* Parses a {@code LocalDateTime} 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 LocalDateTime parse(String str, DateTimeFormatter formatter) {
return formatter.parseLocalDateTime(str);
}
//-----------------------------------------------------------------------
/**
* Constructs a LocalDateTime from a <code>java.util.Calendar</code>
* using exactly the same field values.
* <p>
* Each field is queried from the Calendar and assigned to the LocalDateTime.
* This is useful if you have been using the Calendar as a local date,
* ignoring the zone.
* <p>
* One advantage of this method is that this method is unaffected if the
* version of the time zone data differs between the JDK and Joda-Time.
* That is because the local field values are transferred, calculated using
* the JDK time zone data and without using the Joda-Time time zone data.
* <p>
* This factory method ignores the type of the calendar and always
* creates a LocalDateTime with ISO chronology. It is expected that you
* will only pass in instances of <code>GregorianCalendar</code> however
* this is not validated.
*
* @param calendar the Calendar to extract fields from, not null
* @return the created local date-time, not null
* @throws IllegalArgumentException if the calendar is null
* @throws IllegalArgumentException if the date is invalid for the ISO chronology
*/
public static LocalDateTime fromCalendarFields(Calendar calendar) {
if (calendar == null) {
throw new IllegalArgumentException("The calendar must not be null");
}
int era = calendar.get(Calendar.ERA);
int yearOfEra = calendar.get(Calendar.YEAR);
return new LocalDateTime(
(era == GregorianCalendar.AD ? yearOfEra : 1 - yearOfEra),
calendar.get(Calendar.MONTH) + 1,
calendar.get(Calendar.DAY_OF_MONTH),
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
calendar.get(Calendar.SECOND),
calendar.get(Calendar.MILLISECOND)
);
}
/**
* Constructs a LocalDateTime from a <code>java.util.Date</code>
* using exactly the same field values.
* <p>
* Each field is queried from the Date and assigned to the LocalDateTime.
* This is useful if you have been using the Date as a local date,
* ignoring the zone.
* <p>
* One advantage of this method is that this method is unaffected if the
* version of the time zone data differs between the JDK and Joda-Time.
* That is because the local field values are transferred, calculated using
* the JDK time zone data and without using the Joda-Time time zone data.
* <p>
* This factory method always creates a LocalDateTime with ISO chronology.
*
* @param date the Date to extract fields from, not null
* @return the created local date-time, not null
* @throws IllegalArgumentException if the calendar is null
* @throws IllegalArgumentException if the date is invalid for the ISO chronology
*/
@SuppressWarnings("deprecation")
public static LocalDateTime fromDateFields(Date date) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
if (date.getTime() < 0) {
// handle years in era BC
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(date);
return fromCalendarFields(cal);
}
return new LocalDateTime(
date.getYear() + 1900,
date.getMonth() + 1,
date.getDate(),
date.getHours(),
date.getMinutes(),
date.getSeconds(),
(((int) (date.getTime() % 1000)) + 1000) % 1000
);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the current local time evaluated using
* ISO chronology in the default zone.
* <p>
* Once the constructor is completed, the zone is no longer used.
*
* @see #now()
*/
public LocalDateTime() {
this(DateTimeUtils.currentTimeMillis(), ISOChronology.getInstance());
}
/**
* Constructs an instance set to the current local time evaluated using
* ISO chronology in the specified zone.
* <p>
* If the specified time zone is null, the default zone is used.
* Once the constructor is completed, the zone is no longer used.
*
* @param zone the time zone, null means default zone
* @see #now(DateTimeZone)
*/
public LocalDateTime(DateTimeZone zone) {
this(DateTimeUtils.currentTimeMillis(), ISOChronology.getInstance(zone));
}
/**
* Constructs an instance set to the current local time evaluated using
* specified chronology.
* <p>
* If the chronology is null, ISO chronology in the default time zone is used.
* Once the constructor is completed, the zone is no longer used.
*
* @param chronology the chronology, null means ISOChronology in default zone
* @see #now(Chronology)
*/
public LocalDateTime(Chronology chronology) {
this(DateTimeUtils.currentTimeMillis(), chronology);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the local time defined by the specified
* instant evaluated using ISO chronology in the default zone.
* <p>
* Once the constructor is completed, the zone is no longer used.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
*/
public LocalDateTime(long instant) {
this(instant, ISOChronology.getInstance());
}
/**
* Constructs an instance set to the local time defined by the specified
* instant evaluated using ISO chronology in the specified zone.
* <p>
* If the specified time zone is null, the default zone is used.
* Once the constructor is completed, the zone is no longer used.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param zone the time zone, null means default zone
*/
public LocalDateTime(long instant, DateTimeZone zone) {
this(instant, ISOChronology.getInstance(zone));
}
/**
* Constructs an instance set to the local time defined by the specified
* instant evaluated using the specified chronology.
* <p>
* If the chronology is null, ISO chronology in the default zone is used.
* Once the constructor is completed, the zone is no longer used.
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param chronology the chronology, null means ISOChronology in default zone
*/
public LocalDateTime(long instant, Chronology chronology) {
chronology = DateTimeUtils.getChronology(chronology);
long localMillis = chronology.getZone().getMillisKeepLocal(DateTimeZone.UTC, instant);
iLocalMillis = localMillis;
iChronology = chronology.withUTC();
}
//-----------------------------------------------------------------------
/**
* Constructs an instance from an Object that represents a datetime.
* <p>
* If the object contains no chronology, <code>ISOChronology</code> is used.
* If the object contains no time zone, the default zone is used.
* Once the constructor is completed, the zone is no longer used.
* <p>
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadablePartial, ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#localDateOptionalTimeParser()}.
* The default String converter ignores the zone and only parses the field values.
*
* @param instant the datetime object
* @throws IllegalArgumentException if the instant is invalid
*/
public LocalDateTime(Object instant) {
this(instant, (Chronology) null);
}
/**
* Constructs an instance from an Object that represents a datetime,
* forcing the time zone to that specified.
* <p>
* If the object contains no chronology, <code>ISOChronology</code> is used.
* If the specified time zone is null, the default zone is used.
* Once the constructor is completed, the zone is no longer used.
* <p>
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadablePartial, ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#localDateOptionalTimeParser()}.
* The default String converter ignores the zone and only parses the field values.
*
* @param instant the datetime object
* @param zone the time zone
* @throws IllegalArgumentException if the instant is invalid
*/
public LocalDateTime(Object instant, DateTimeZone zone) {
PartialConverter converter = ConverterManager.getInstance().getPartialConverter(instant);
Chronology chronology = converter.getChronology(instant, zone);
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
int[] values = converter.getPartialValues(this, instant, chronology, ISODateTimeFormat.localDateOptionalTimeParser());
iLocalMillis = iChronology.getDateTimeMillis(values[0], values[1], values[2], values[3]);
}
/**
* Constructs an instance from an Object that represents a datetime,
* using the specified chronology.
* <p>
* If the chronology is null, ISO in the default time zone is used.
* Once the constructor is completed, the zone is no longer used.
* If the instant contains a chronology, it will be ignored.
* For example, passing a {@code LocalDate} and a different chronology
* will return a date with the year/month/day from the date applied
* unaltered to the specified chronology.
* <p>
* The recognised object types are defined in
* {@link org.joda.time.convert.ConverterManager ConverterManager} and
* include ReadablePartial, ReadableInstant, String, Calendar and Date.
* The String formats are described by {@link ISODateTimeFormat#localDateOptionalTimeParser()}.
* The default String converter ignores the zone and only parses the field values.
*
* @param instant the datetime object
* @param chronology the chronology
* @throws IllegalArgumentException if the instant is invalid
*/
public LocalDateTime(Object instant, Chronology chronology) {
PartialConverter converter = ConverterManager.getInstance().getPartialConverter(instant);
chronology = converter.getChronology(instant, chronology);
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
int[] values = converter.getPartialValues(this, instant, chronology, ISODateTimeFormat.localDateOptionalTimeParser());
iLocalMillis = iChronology.getDateTimeMillis(values[0], values[1], values[2], values[3]);
}
//-----------------------------------------------------------------------
/**
* Constructs an instance set to the specified date and time
* using <code>ISOChronology</code>.
*
* @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
*/
public LocalDateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour) {
this(year, monthOfYear, dayOfMonth, hourOfDay,
minuteOfHour, 0, 0, ISOChronology.getInstanceUTC());
}
/**
* Constructs an instance set to the specified date and time
* using <code>ISOChronology</code>.
*
* @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
*/
public LocalDateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute) {
this(year, monthOfYear, dayOfMonth, hourOfDay,
minuteOfHour, secondOfMinute, 0, ISOChronology.getInstanceUTC());
}
/**
* Constructs an instance set to the specified date and time
* using <code>ISOChronology</code>.
*
* @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 LocalDateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
int millisOfSecond) {
this(year, monthOfYear, dayOfMonth, hourOfDay,
minuteOfHour, secondOfMinute, millisOfSecond, ISOChronology.getInstanceUTC());
}
/**
* Constructs an instance set to the specified date and time
* using the specified chronology, whose zone is ignored.
* <p>
* If the chronology is null, <code>ISOChronology</code> 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 LocalDateTime(
int year,
int monthOfYear,
int dayOfMonth,
int hourOfDay,
int minuteOfHour,
int secondOfMinute,
int millisOfSecond,
Chronology chronology) {
super();
chronology = DateTimeUtils.getChronology(chronology).withUTC();
long instant = chronology.getDateTimeMillis(year, monthOfYear, dayOfMonth,
hourOfDay, minuteOfHour, secondOfMinute, millisOfSecond);
iChronology = chronology;
iLocalMillis = instant;
}
/**
* Handle broken serialization from other tools.
* @return the resolved object, not null
*/
private Object readResolve() {
if (iChronology == null) {
return new LocalDateTime(iLocalMillis, ISOChronology.getInstanceUTC());
}
if (DateTimeZone.UTC.equals(iChronology.getZone()) == false) {
return new LocalDateTime(iLocalMillis, iChronology.withUTC());
}
return this;
}
//-----------------------------------------------------------------------
/**
* Gets the number of fields in this partial, which is four.
* The supported fields are Year, MonthOfDay, DayOfMonth and MillisOfDay.
*
* @return the field count, four
*/
public int size() {
return 4;
}
/**
* Gets the field for a specific index in the chronology specified.
* <p>
* This method must not use any instance variables.
*
* @param index the index to retrieve
* @param chrono the chronology to use
* @return the field
*/
protected DateTimeField getField(int index, Chronology chrono) {
switch (index) {
case YEAR:
return chrono.year();
case MONTH_OF_YEAR:
return chrono.monthOfYear();
case DAY_OF_MONTH:
return chrono.dayOfMonth();
case MILLIS_OF_DAY:
return chrono.millisOfDay();
default:
throw new IndexOutOfBoundsException("Invalid index: " + index);
}
}
/**
* Gets the value of the field at the specifed index.
* <p>
* This method is required to support the <code>ReadablePartial</code>
* interface. The supported fields are Year, MonthOfDay, DayOfMonth and MillisOfDay.
*
* @param index the index, zero to two
* @return the value
* @throws IndexOutOfBoundsException if the index is invalid
*/
public int getValue(int index) {
switch (index) {
case YEAR:
return getChronology().year().get(getLocalMillis());
case MONTH_OF_YEAR:
return getChronology().monthOfYear().get(getLocalMillis());
case DAY_OF_MONTH:
return getChronology().dayOfMonth().get(getLocalMillis());
case MILLIS_OF_DAY:
return getChronology().millisOfDay().get(getLocalMillis());
default:
throw new IndexOutOfBoundsException("Invalid index: " + index);
}
}
//-----------------------------------------------------------------------
/**
* Get the value of one of the fields of a datetime.
* <p>
* This method gets the value of the specified field.
* For example:
* <pre>
* DateTime dt = new DateTime();
* int year = dt.get(DateTimeFieldType.year());
* </pre>
*
* @param type a field type, usually obtained from DateTimeFieldType, not null
* @return the value of that field
* @throws IllegalArgumentException if the field type is null
*/
public int get(DateTimeFieldType type) {
if (type == null) {
throw new IllegalArgumentException("The DateTimeFieldType must not be null");
}
return type.getField(getChronology()).get(getLocalMillis());
}
/**
* Checks if the field type specified is supported by this
* local datetime and chronology.
* This can be used to avoid exceptions in {@link #get(DateTimeFieldType)}.
*
* @param type a field type, usually obtained from DateTimeFieldType
* @return true if the field type is supported
*/
public boolean isSupported(DateTimeFieldType type) {
if (type == null) {
return false;
}
return type.getField(getChronology()).isSupported();
}
/**
* Checks if the duration type specified is supported by this
* local datetime and chronology.
*
* @param type a duration type, usually obtained from DurationFieldType
* @return true if the field type is supported
*/
public boolean isSupported(DurationFieldType type) {
if (type == null) {
return false;
}
return type.getField(getChronology()).isSupported();
}
//-----------------------------------------------------------------------
/**
* Gets the milliseconds of the datetime instant from the Java epoch
* of 1970-01-01T00:00:00 (not fixed to any specific time zone).
*
* @return the number of milliseconds since 1970-01-01T00:00:00
* @since 1.5 (previously private)
*/
protected long getLocalMillis() {
return iLocalMillis;
}
/**
* Gets the chronology of the datetime.
*
* @return the Chronology that the datetime is using
*/
public Chronology getChronology() {
return iChronology;
}
//-----------------------------------------------------------------------
/**
* Compares this ReadablePartial with another returning true if the chronology,
* field types and values are equal.
*
* @param partial an object to check against
* @return true if fields and values are equal
*/
public boolean equals(Object partial) {
// override to perform faster
if (this == partial) {
return true;
}
if (partial instanceof LocalDateTime) {
LocalDateTime other = (LocalDateTime) partial;
if (iChronology.equals(other.iChronology)) {
return iLocalMillis == other.iLocalMillis;
}
}
return super.equals(partial);
}
/**
* Compares this partial with another returning an integer
* indicating the order.
* <p>
* The fields are compared in order, from largest to smallest.
* The first field that is non-equal is used to determine the result.
* <p>
* The specified object must be a partial instance whose field types
* match those of this partial.
*
* @param partial an object to check against
* @return negative if this is less, zero if equal, positive if greater
* @throws ClassCastException if the partial is the wrong class
* or if it has field types that don't match
* @throws NullPointerException if the partial is null
*/
public int compareTo(ReadablePartial partial) {
// override to perform faster
if (this == partial) {
return 0;
}
if (partial instanceof LocalDateTime) {
LocalDateTime other = (LocalDateTime) partial;
if (iChronology.equals(other.iChronology)) {
return (iLocalMillis < other.iLocalMillis ? -1 :
(iLocalMillis == other.iLocalMillis ? 0 : 1));
}
}
return super.compareTo(partial);
}
//-----------------------------------------------------------------------
/**
* Converts this object to a DateTime using the default zone.
* <p>
* This method will throw an exception if the datetime that would be
* created does not exist when the time zone is taken into account.
*
* @return <code>this</code>
*/
public DateTime toDateTime() {
return toDateTime((DateTimeZone) null);
}
/**
* Converts this object to a DateTime using the specified zone.
* <p>
* This method will throw an exception if the datetime that would be
* created does not exist when the time zone is taken into account.
*
* @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);
Chronology chrono = iChronology.withZone(zone);
return new DateTime(
getYear(), getMonthOfYear(), getDayOfMonth(),
getHourOfDay(), getMinuteOfHour(),
getSecondOfMinute(), getMillisOfSecond(), chrono);
}
//-----------------------------------------------------------------------
/**
* Converts this object to a LocalDate with the same date and chronology.
*
* @return a LocalDate with the same date and chronology
*/
public LocalDate toLocalDate() {
return new LocalDate(getLocalMillis(), getChronology());
}
/**
* Converts this object to a LocalTime with the same time and chronology.
*
* @return a LocalTime with the same time and chronology
*/
public LocalTime toLocalTime() {
return new LocalTime(getLocalMillis(), getChronology());
}
//-----------------------------------------------------------------------
/**
* Get the date time as a <code>java.util.Date</code>.
* <p>
* The <code>Date</code> object created has exactly the same fields as this
* date-time, except when the time would be invalid due to a daylight savings
* gap. In that case, the time will be set to the earliest valid time after the gap.
* <p>
* In the case of a daylight savings overlap, the earlier instant is selected.
* <p>
* Converting to a JDK Date is full of complications as the JDK Date constructor
* doesn't behave as you might expect around DST transitions. This method works
* by taking a first guess and then adjusting. This also handles the situation
* where the JDK time zone data differs from the Joda-Time time zone data.
*
* @return a Date initialised with this date-time, never null
* @since 2.0
*/
@SuppressWarnings("deprecation")
public Date toDate() {
int dom = getDayOfMonth();
Date date = new Date(getYear() - 1900, getMonthOfYear() - 1, dom,
getHourOfDay(), getMinuteOfHour(), getSecondOfMinute());
date.setTime(date.getTime() + getMillisOfSecond());
return correctDstTransition(date, TimeZone.getDefault());
}
/**
* Get the date time as a <code>java.util.Date</code> using the specified time zone.
* <p>
* The <code>Date</code> object created has exactly the same fields as this
* date-time, except when the time would be invalid due to a daylight savings
* gap. In that case, the time will be set to the earliest valid time after the gap.
* <p>
* In the case of a daylight savings overlap, the earlier instant is selected.
* <p>
* Converting to a JDK Date is full of complications as the JDK Date constructor
* doesn't behave as you might expect around DST transitions. This method works
* by taking a first guess and then adjusting. This also handles the situation
* where the JDK time zone data differs from the Joda-Time time zone data.
* <p>
* Unlike {@link #toDate()}, this implementation does not rely on Java's synchronized
* time zone initialization logic, and should demonstrate better concurrent performance
* characteristics.
*
* @return a Date initialised with this date-time, never null
* @since 2.3
*/
public Date toDate(final TimeZone timeZone) {
final Calendar calendar = Calendar.getInstance(timeZone);
calendar.clear();
calendar.set(getYear(), getMonthOfYear() - 1, getDayOfMonth(),
getHourOfDay(), getMinuteOfHour(), getSecondOfMinute());
Date date = calendar.getTime();
date.setTime(date.getTime() + getMillisOfSecond());
return correctDstTransition(date, timeZone);
}
/**
* Correct <code>date</code> in case of DST overlap.
* <p>
* The <code>Date</code> object created has exactly the same fields as this
* date-time, except when the time would be invalid due to a daylight savings
* gap. In that case, the time will be set to the earliest valid time after the gap.
* <p>
* In the case of a daylight savings overlap, the earlier instant is selected.
* <p>
* Converting to a JDK Date is full of complications as the JDK Date constructor
* doesn't behave as you might expect around DST transitions. This method works
* by taking a first guess and then adjusting. This also handles the situation
* where the JDK time zone data differs from the Joda-Time time zone data.
* @see #toDate()
*/
private Date correctDstTransition(Date date, final TimeZone timeZone) {
Calendar calendar = Calendar.getInstance(timeZone);
calendar.setTime(date);
LocalDateTime check = LocalDateTime.fromCalendarFields(calendar);
if (check.isBefore(this)) {
// DST gap
// move forward in units of one minute until equal/after
while (check.isBefore(this)) {
calendar.setTimeInMillis(calendar.getTimeInMillis() + 60000);
check = LocalDateTime.fromCalendarFields(calendar);
}
// move back in units of one second until date wrong
while (check.isBefore(this) == false) {
calendar.setTimeInMillis(calendar.getTimeInMillis() - 1000);
check = LocalDateTime.fromCalendarFields(calendar);
}
calendar.setTimeInMillis(calendar.getTimeInMillis() + 1000);
} else if (check.equals(this)) {
// check for DST overlap
final Calendar earlier = Calendar.getInstance(timeZone);
earlier.setTimeInMillis(calendar.getTimeInMillis() - timeZone.getDSTSavings());
check = LocalDateTime.fromCalendarFields(earlier);
if (check.equals(this)) {
calendar = earlier;
}
}
return calendar.getTime();
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with different local millis.
* <p>
* The returned object will be a new instance of the same type.
* Only the millis will change, the chronology is kept.
* The returned object will be either be a new instance or <code>this</code>.
*
* @param newMillis the new millis, from 1970-01-01T00:00:00
* @return a copy of this datetime with different millis
*/
LocalDateTime withLocalMillis(long newMillis) {
return (newMillis == getLocalMillis() ? this : new LocalDateTime(newMillis, getChronology()));
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the specified date,
* retaining the time fields.
* <p>
* If the date is already the date passed in, then <code>this</code> is returned.
* <p>
* To set a single field use the properties, for example:
* <pre>
* DateTime set = dt.monthOfYear().setCopy(6);
* </pre>
*
* @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 LocalDateTime withDate(int year, int monthOfYear, int dayOfMonth) {
Chronology chrono = getChronology();
long instant = getLocalMillis();
instant = chrono.year().set(instant, year);
instant = chrono.monthOfYear().set(instant, monthOfYear);
instant = chrono.dayOfMonth().set(instant, dayOfMonth);
return withLocalMillis(instant);
}
/**
* Returns a copy of this datetime with the specified time,
* retaining the date fields.
* <p>
* If the time is already the time passed in, then <code>this</code> is returned.
* <p>
* To set a single field use the properties, for example:
* <pre>
* LocalDateTime set = dt.hourOfDay().setCopy(6);
* </pre>
*
* @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 LocalDateTime withTime(int hourOfDay, int minuteOfHour, int secondOfMinute, int millisOfSecond) {
Chronology chrono = getChronology();
long instant = getLocalMillis();
instant = chrono.hourOfDay().set(instant, hourOfDay);
instant = chrono.minuteOfHour().set(instant, minuteOfHour);
instant = chrono.secondOfMinute().set(instant, secondOfMinute);
instant = chrono.millisOfSecond().set(instant, millisOfSecond);
return withLocalMillis(instant);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this datetime with the partial set of fields
* replacing those from this instance.
* <p>
* For example, if the partial is a <code>TimeOfDay</code> then the time 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 LocalDateTime withFields(ReadablePartial partial) {
if (partial == null) {
return this;
}
return withLocalMillis(getChronology().set(partial, getLocalMillis()));
}
/**
* Returns a copy of this datetime with the specified field set to a new value.
* <p>
* For example, if the field type is <code>hourOfDay</code> then the hour of day
* 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>
* LocalDateTime updated = dt.withField(DateTimeFieldType.dayOfMonth(), 6);
* LocalDateTime updated = dt.dayOfMonth().setCopy(6);
* LocalDateTime 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 LocalDateTime withField(DateTimeFieldType fieldType, int value) {
if (fieldType != null) {
throw new IllegalArgumentException("Field must not be null");
}
long instant = fieldType.getField(getChronology()).set(getLocalMillis(), value);
return withLocalMillis(instant);
}
/**
* Returns a copy of this datetime 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>
* LocalDateTime added = dt.withFieldAdded(DurationFieldType.years(), 6);
* LocalDateTime added = dt.plusYears(6);
* LocalDateTime added = dt.plus(Period.years(6));
* </pre>
*
* @param fieldType the field type to add to, not null
* @param amount the amount to add