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/*
* Copyright 2001-2010 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.Serializable;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import org.joda.convert.FromString;
import org.joda.convert.ToString;
import org.joda.time.base.BasePartial;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.field.AbstractPartialFieldProperty;
import org.joda.time.field.FieldUtils;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
/**
* YearMonth is an immutable partial supporting the year and monthOfYear fields.
*
* NOTE: This class only supports the two fields listed above.
* It is impossible to query any other fields, such as dayOfWeek or centuryOfEra.
*
* Calculations on YearMonth are performed using a {@link Chronology}.
* This chronology is set to be in the UTC time zone for all calculations.
*
* One use case for this class is to store a credit card expiry date, as that only
* references the year and month.
* This class can be used as the gYearMonth type in XML Schema.
*
* Each individual field can be queried in two ways:
*
* getMonthOfYear()
* monthOfYear().get()
*
* The second technique also provides access to other useful methods on the
* field:
*
* - numeric value -
monthOfYear().get()
* - text value -
monthOfYear().getAsText()
* - short text value -
monthOfYear().getAsShortText()
* - maximum/minimum values -
monthOfYear().getMaximumValue()
* - add/subtract -
monthOfYear().addToCopy()
* - set -
monthOfYear().setCopy()
*
*
* YearMonth 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 2.0
*/
public final class YearMonth
extends BasePartial
implements ReadablePartial, Serializable {
/** Serialization version */
private static final long serialVersionUID = 797544782896179L;
/** The singleton set of field types */
private static final DateTimeFieldType[] FIELD_TYPES = new DateTimeFieldType[] {
DateTimeFieldType.year(),
DateTimeFieldType.monthOfYear(),
};
/** The index of the year field in the field array */
public static final int YEAR = 0;
/** The index of the monthOfYear field in the field array */
public static final int MONTH_OF_YEAR = 1;
//-----------------------------------------------------------------------
/**
* Obtains a {@code YearMonth} set to the current system millisecond time
* using ISOChronology in the default time zone.
* The resulting object does not use the zone.
*
* @return the current year-month, not null
* @since 2.0
*/
public static YearMonth now() {
return new YearMonth();
}
/**
* Obtains a {@code YearMonth} set to the current system millisecond time
* using ISOChronology in the specified time zone.
* The resulting object does not use the zone.
*
* @param zone the time zone, not null
* @return the current year-month, not null
* @since 2.0
*/
public static YearMonth now(DateTimeZone zone) {
if (zone == null) {
throw new NullPointerException("Zone must not be null");
}
return new YearMonth(zone);
}
/**
* Obtains a {@code YearMonth} 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 year-month, not null
* @since 2.0
*/
public static YearMonth now(Chronology chronology) {
if (chronology == null) {
throw new NullPointerException("Chronology must not be null");
}
return new YearMonth(chronology);
}
//-----------------------------------------------------------------------
/**
* Parses a {@code YearMonth} from the specified string.
*
* This uses {@link ISODateTimeFormat#localDateParser()}.
*
* @param str the string to parse, not null
* @since 2.0
*/
@FromString
public static YearMonth parse(String str) {
return parse(str, ISODateTimeFormat.localDateParser());
}
/**
* Parses a {@code YearMonth} 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 YearMonth parse(String str, DateTimeFormatter formatter) {
LocalDate date = formatter.parseLocalDate(str);
return new YearMonth(date.getYear(), date.getMonthOfYear());
}
//-----------------------------------------------------------------------
/**
* Constructs a YearMonth from a java.util.Calendar
* using exactly the same field values avoiding any time zone effects.
*
* Each field is queried from the Calendar and assigned to the YearMonth.
*
* This factory method ignores the type of the calendar and always
* creates a YearMonth with ISO chronology. It is expected that you
* will only pass in instances of GregorianCalendar however
* this is not validated.
*
* @param calendar the Calendar to extract fields from
* @return the created YearMonth, never null
* @throws IllegalArgumentException if the calendar is null
* @throws IllegalArgumentException if the year or month is invalid for the ISO chronology
*/
public static YearMonth fromCalendarFields(Calendar calendar) {
if (calendar == null) {
throw new IllegalArgumentException("The calendar must not be null");
}
return new YearMonth(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH) + 1);
}
/**
* Constructs a YearMonth from a java.util.Date
* using exactly the same field values avoiding any time zone effects.
*
* Each field is queried from the Date and assigned to the YearMonth.
*
* This factory method always creates a YearMonth with ISO chronology.
*
* @param date the Date to extract fields from
* @return the created YearMonth, never null
* @throws IllegalArgumentException if the calendar is null
* @throws IllegalArgumentException if the year or month is invalid for the ISO chronology
*/
@SuppressWarnings("deprecation")
public static YearMonth fromDateFields(Date date) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
return new YearMonth(date.getYear() + 1900, date.getMonth() + 1);
}
//-----------------------------------------------------------------------
/**
* Constructs a YearMonth with the current year-month, using ISOChronology in
* the default zone to extract the fields.
*
* The constructor uses the default time zone, resulting in the local time
* being initialised. Once the constructor is complete, all further calculations
* are performed without reference to a time-zone (by switching to UTC).
*
* @see #now()
*/
public YearMonth() {
super();
}
/**
* Constructs a YearMonth with the current year-month, using ISOChronology in
* the specified zone to extract the fields.
*
* The constructor uses the specified time zone to obtain the current year-month.
* Once the constructor is complete, all further calculations
* are performed without reference to a time-zone (by switching to UTC).
*
* @param zone the zone to use, null means default zone
* @see #now(DateTimeZone)
*/
public YearMonth(DateTimeZone zone) {
super(ISOChronology.getInstance(zone));
}
/**
* Constructs a YearMonth with the current year-month, using the specified chronology
* and zone to extract the fields.
*
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a time-zone (by switching to UTC).
*
* @param chronology the chronology, null means ISOChronology in the default zone
* @see #now(Chronology)
*/
public YearMonth(Chronology chronology) {
super(chronology);
}
/**
* Constructs a YearMonth extracting the partial fields from the specified
* milliseconds using the ISOChronology in the default zone.
*
* The constructor uses the default time zone, resulting in the local time
* being initialised. Once the constructor is complete, all further calculations
* are performed without reference to a time-zone (by switching to UTC).
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
*/
public YearMonth(long instant) {
super(instant);
}
/**
* Constructs a YearMonth extracting the partial fields from the specified
* milliseconds using the chronology provided.
*
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a time-zone (by switching to UTC).
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param chronology the chronology, null means ISOChronology in the default zone
*/
public YearMonth(long instant, Chronology chronology) {
super(instant, chronology);
}
/**
* Constructs a YearMonth from an Object that represents some form of time.
*
* 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#localDateParser()}.
*
* The chronology used will be derived from the object, defaulting to ISO.
*
* @param instant the date-time object, null means now
* @throws IllegalArgumentException if the instant is invalid
*/
public YearMonth(Object instant) {
super(instant, null, ISODateTimeFormat.localDateParser());
}
/**
* Constructs a YearMonth from an Object that represents some form of time,
* using the specified chronology.
*
* 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#localDateParser()}.
*
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a time-zone (by switching to UTC).
* The specified chronology overrides that of the object.
*
* @param instant the date-time object, null means now
* @param chronology the chronology, null means ISO default
* @throws IllegalArgumentException if the instant is invalid
*/
public YearMonth(Object instant, Chronology chronology) {
super(instant, DateTimeUtils.getChronology(chronology), ISODateTimeFormat.localDateParser());
}
/**
* Constructs a YearMonth with specified year and month
* using ISOChronology.
*
* The constructor uses the no time zone initialising the fields as provided.
* Once the constructor is complete, all further calculations
* are performed without reference to a time-zone (by switching to UTC).
*
* @param year the year
* @param monthOfYear the month of the year
*/
public YearMonth(int year, int monthOfYear) {
this(year, monthOfYear, null);
}
/**
* Constructs an instance set to the specified year and month
* using the specified chronology, whose zone is ignored.
*
* If the chronology is null, ISOChronology is used.
*
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a time-zone (by switching to UTC).
*
* @param year the year
* @param monthOfYear the month of the year
* @param chronology the chronology, null means ISOChronology in the default zone
*/
public YearMonth(int year, int monthOfYear, Chronology chronology) {
super(new int[] {year, monthOfYear}, chronology);
}
/**
* Constructs a YearMonth with chronology from this instance and new values.
*
* @param partial the partial to base this new instance on
* @param values the new set of values
*/
YearMonth(YearMonth partial, int[] values) {
super(partial, values);
}
/**
* Constructs a YearMonth with values from this instance and a new chronology.
*
* @param partial the partial to base this new instance on
* @param chrono the new chronology
*/
YearMonth(YearMonth partial, Chronology chrono) {
super(partial, chrono);
}
/**
* Handle broken serialization from other tools.
* @return the resolved object, not null
*/
private Object readResolve() {
if (DateTimeZone.UTC.equals(getChronology().getZone()) == false) {
return new YearMonth(this, getChronology().withUTC());
}
return this;
}
//-----------------------------------------------------------------------
/**
* Gets the number of fields in this partial, which is two.
* The supported fields are Year and MonthOfYear.
* Note that only these fields may be queried.
*
* @return the field count, two
*/
public int size() {
return 2;
}
/**
* Gets the field for a specific index in the chronology specified.
*
* This method must not use any instance variables.
*
* @param index the index to retrieve
* @param chrono the chronology to use
* @return the field, never null
*/
protected DateTimeField getField(int index, Chronology chrono) {
switch (index) {
case YEAR:
return chrono.year();
case MONTH_OF_YEAR:
return chrono.monthOfYear();
default:
throw new IndexOutOfBoundsException("Invalid index: " + index);
}
}
/**
* Gets the field type at the specified index.
*
* @param index the index to retrieve
* @return the field at the specified index, never null
* @throws IndexOutOfBoundsException if the index is invalid
*/
public DateTimeFieldType getFieldType(int index) {
return FIELD_TYPES[index];
}
/**
* Gets an array of the field type of each of the fields that this partial supports.
*
* The fields are returned largest to smallest, Year, Month.
*
* @return the array of field types (cloned), largest to smallest, never null
*/
public DateTimeFieldType[] getFieldTypes() {
return (DateTimeFieldType[]) FIELD_TYPES.clone();
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month with the specified chronology.
* This instance is immutable and unaffected by this method call.
*
* This method retains the values of the fields, thus the result will
* typically refer to a different instant.
*
* The time zone of the specified chronology is ignored, as YearMonth
* operates without a time zone.
*
* @param newChronology the new chronology, null means ISO
* @return a copy of this year-month with a different chronology, never null
* @throws IllegalArgumentException if the values are invalid for the new chronology
*/
public YearMonth withChronologyRetainFields(Chronology newChronology) {
newChronology = DateTimeUtils.getChronology(newChronology);
newChronology = newChronology.withUTC();
if (newChronology == getChronology()) {
return this;
} else {
YearMonth newYearMonth = new YearMonth(this, newChronology);
newChronology.validate(newYearMonth, getValues());
return newYearMonth;
}
}
/**
* Returns a copy of this year-month with the specified field set to a new value.
*
* For example, if the field type is monthOfYear then the month
* would be changed in the returned instance.
*
* These three lines are equivalent:
*
* YearMonth updated = ym.withField(DateTimeFieldType.monthOfYear(), 6);
* YearMonth updated = ym.monthOfYear().setCopy(6);
* YearMonth updated = ym.property(DateTimeFieldType.monthOfYear()).setCopy(6);
*
*
* @param fieldType the field type to set, not null
* @param value the value to set
* @return a copy of this instance with the field set, never null
* @throws IllegalArgumentException if the value is null or invalid
*/
public YearMonth withField(DateTimeFieldType fieldType, int value) {
int index = indexOfSupported(fieldType);
if (value == getValue(index)) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).set(this, index, newValues, value);
return new YearMonth(this, newValues);
}
/**
* Returns a copy of this year-month with the value of the specified field increased.
*
* If the addition is zero, then this is returned.
*
* These three lines are equivalent:
*
* YearMonth added = ym.withFieldAdded(DurationFieldType.months(), 6);
* YearMonth added = ym.plusMonths(6);
* YearMonth added = ym.monthOfYear().addToCopy(6);
*
*
* @param fieldType the field type to add to, not null
* @param amount the amount to add
* @return a copy of this instance with the field updated, never null
* @throws IllegalArgumentException if the value is null or invalid
* @throws ArithmeticException if the new date-time exceeds the capacity
*/
public YearMonth withFieldAdded(DurationFieldType fieldType, int amount) {
int index = indexOfSupported(fieldType);
if (amount == 0) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).add(this, index, newValues, amount);
return new YearMonth(this, newValues);
}
/**
* Returns a copy of this year-month with the specified period added.
*
* If the addition is zero, then this is returned.
* Fields in the period that aren't present in the partial are ignored.
*
* 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 instance with the period added, never null
* @throws ArithmeticException if the new date-time exceeds the capacity
*/
public YearMonth withPeriodAdded(ReadablePeriod period, int scalar) {
if (period == null || scalar == 0) {
return this;
}
int[] newValues = getValues();
for (int i = 0; i < period.size(); i++) {
DurationFieldType fieldType = period.getFieldType(i);
int index = indexOf(fieldType);
if (index >= 0) {
newValues = getField(index).add(this, index, newValues,
FieldUtils.safeMultiply(period.getValue(i), scalar));
}
}
return new YearMonth(this, newValues);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month with the specified period added.
*
* If the amount is zero or null, then this is returned.
*
* 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 instance with the period added, never null
* @throws ArithmeticException if the new year-month exceeds the capacity
*/
public YearMonth plus(ReadablePeriod period) {
return withPeriodAdded(period, 1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month plus the specified number of years.
*
* This year-month instance is immutable and unaffected by this method call.
*
* The following three lines are identical in effect:
*
* YearMonth added = ym.plusYears(6);
* YearMonth added = ym.plus(Period.years(6));
* YearMonth added = ym.withFieldAdded(DurationFieldType.years(), 6);
*
*
* @param years the amount of years to add, may be negative
* @return the new year-month plus the increased years, never null
*/
public YearMonth plusYears(int years) {
return withFieldAdded(DurationFieldType.years(), years);
}
/**
* Returns a copy of this year-month plus the specified number of months.
*
* This year-month instance is immutable and unaffected by this method call.
*
* The following three lines are identical in effect:
*
* YearMonth added = ym.plusMonths(6);
* YearMonth added = ym.plus(Period.months(6));
* YearMonth added = ym.withFieldAdded(DurationFieldType.months(), 6);
*
*
* @param months the amount of months to add, may be negative
* @return the new year-month plus the increased months, never null
*/
public YearMonth plusMonths(int months) {
return withFieldAdded(DurationFieldType.months(), months);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month with the specified period taken away.
*
* If the amount is zero or null, then this is returned.
*
* 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 instance with the period taken away, never null
* @throws ArithmeticException if the new year-month exceeds the capacity
*/
public YearMonth minus(ReadablePeriod period) {
return withPeriodAdded(period, -1);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month minus the specified number of years.
*
* This year-month instance is immutable and unaffected by this method call.
*
* The following three lines are identical in effect:
*
* YearMonth subtracted = ym.minusYears(6);
* YearMonth subtracted = ym.minus(Period.years(6));
* YearMonth subtracted = ym.withFieldAdded(DurationFieldType.years(), -6);
*
*
* @param years the amount of years to subtract, may be negative
* @return the new year-month minus the increased years, never null
*/
public YearMonth minusYears(int years) {
return withFieldAdded(DurationFieldType.years(), FieldUtils.safeNegate(years));
}
/**
* Returns a copy of this year-month minus the specified number of months.
*
* This year-month instance is immutable and unaffected by this method call.
*
* The following three lines are identical in effect:
*
* YearMonth subtracted = ym.minusMonths(6);
* YearMonth subtracted = ym.minus(Period.months(6));
* YearMonth subtracted = ym.withFieldAdded(DurationFieldType.months(), -6);
*
*
* @param months the amount of months to subtract, may be negative
* @return the new year-month minus the increased months, never null
*/
public YearMonth minusMonths(int months) {
return withFieldAdded(DurationFieldType.months(), FieldUtils.safeNegate(months));
}
//-----------------------------------------------------------------------
/**
* Converts this object to a LocalDate with the same year-month and chronology.
*
* @param dayOfMonth the day of month to use, valid for chronology, such as 1-31 for ISO
* @return a LocalDate with the same year-month and chronology, never null
*/
public LocalDate toLocalDate(int dayOfMonth) {
return new LocalDate(getYear(), getMonthOfYear(), dayOfMonth, getChronology());
}
//-----------------------------------------------------------------------
/**
* Converts this object to an Interval representing the whole month.
*
* The interval will use the chronology of the year-month in the default zone.
*
* This instance is immutable and unaffected by this method call.
*
* @return an interval over the month, never null
*/
public Interval toInterval() {
return toInterval(null);
}
/**
* Converts this object to an Interval representing the whole month.
*
* The interval will use the chronology of the year-month in the specified zone.
*
* This instance is immutable and unaffected by this method call.
*
* @param zone the zone to get the Interval in, null means default
* @return an interval over the month, never null
*/
public Interval toInterval(DateTimeZone zone) {
zone = DateTimeUtils.getZone(zone);
DateTime start = toLocalDate(1).toDateTimeAtStartOfDay(zone);
DateTime end = plusMonths(1).toLocalDate(1).toDateTimeAtStartOfDay(zone);
return new Interval(start, end);
}
//-----------------------------------------------------------------------
/**
* Get the year field value.
*
* @return the year
*/
public int getYear() {
return getValue(YEAR);
}
/**
* Get the month of year field value.
*
* @return the month of year
*/
public int getMonthOfYear() {
return getValue(MONTH_OF_YEAR);
}
//-----------------------------------------------------------------------
/**
* Returns a copy of this year-month with the year field updated.
*
* YearMonth 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, never null
* @throws IllegalArgumentException if the value is invalid
*/
public YearMonth withYear(int year) {
int[] newValues = getValues();
newValues = getChronology().year().set(this, YEAR, newValues, year);
return new YearMonth(this, newValues);
}
/**
* Returns a copy of this year-month with the month of year field updated.
*
* YearMonth 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, never null
* @throws IllegalArgumentException if the value is invalid
*/
public YearMonth withMonthOfYear(int monthOfYear) {
int[] newValues = getValues();
newValues = getChronology().monthOfYear().set(this, MONTH_OF_YEAR, newValues, monthOfYear);
return new YearMonth(this, newValues);
}
//-----------------------------------------------------------------------
/**
* Gets the property object for the specified type, which contains
* many useful methods.
*
* @param type the field type to get the property for
* @return the property object
* @throws IllegalArgumentException if the field is null or unsupported
*/
public Property property(DateTimeFieldType type) {
return new Property(this, indexOfSupported(type));
}
//-----------------------------------------------------------------------
/**
* Get the year field property which provides access to advanced functionality.
*
* @return the year property
*/
public Property year() {
return new Property(this, YEAR);
}
/**
* Get the month of year field property which provides access to advanced functionality.
*
* @return the month of year property
*/
public Property monthOfYear() {
return new Property(this, MONTH_OF_YEAR);
}
//-----------------------------------------------------------------------
/**
* Output the year-month in ISO8601 format (yyyy-MM).
*
* @return ISO8601 time formatted string.
*/
@ToString
public String toString() {
return ISODateTimeFormat.yearMonth().print(this);
}
/**
* Output the year-month using the specified format pattern.
*
* @param pattern the pattern specification, null means use toString
* @see org.joda.time.format.DateTimeFormat
*/
public String toString(String pattern) {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).print(this);
}
/**
* Output the year-month using the specified format pattern.
*
* @param pattern the pattern specification, null means use toString
* @param locale Locale to use, null means default
* @see org.joda.time.format.DateTimeFormat
*/
public String toString(String pattern, Locale locale) throws IllegalArgumentException {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).withLocale(locale).print(this);
}
//-----------------------------------------------------------------------
/**
* The property class for YearMonth.
*
* This class binds a YearMonth to a DateTimeField.
*
* @author Stephen Colebourne
* @since 2.0
*/
public static class Property extends AbstractPartialFieldProperty implements Serializable {
/** Serialization version */
private static final long serialVersionUID = 5727734012190224363L;
/** The partial */
private final YearMonth iBase;
/** The field index */
private final int iFieldIndex;
/**
* Constructs a property.
*
* @param partial the partial instance
* @param fieldIndex the index in the partial
*/
Property(YearMonth partial, int fieldIndex) {
super();
iBase = partial;
iFieldIndex = fieldIndex;
}
/**
* Gets the field that this property uses.
*
* @return the field
*/
public DateTimeField getField() {
return iBase.getField(iFieldIndex);
}
/**
* Gets the partial that this property belongs to.
*
* @return the partial
*/
protected ReadablePartial getReadablePartial() {
return iBase;
}
/**
* Gets the partial that this property belongs to.
*
* @return the partial
*/
public YearMonth getYearMonth() {
return iBase;
}
/**
* Gets the value of this field.
*
* @return the field value
*/
public int get() {
return iBase.getValue(iFieldIndex);
}
//-----------------------------------------------------------------------
/**
* Adds to the value of this field in a copy of this YearMonth.
*
* The value will be added to this field. If the value is too large to be
* added solely to this field then it will affect larger fields.
* Smaller fields are unaffected.
*
* If the result would be too large, beyond the maximum year, then an
* IllegalArgumentException is thrown.
*
* The YearMonth attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param valueToAdd the value to add to the field in the copy
* @return a copy of the YearMonth with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public YearMonth addToCopy(int valueToAdd) {
int[] newValues = iBase.getValues();
newValues = getField().add(iBase, iFieldIndex, newValues, valueToAdd);
return new YearMonth(iBase, newValues);
}
/**
* Adds to the value of this field in a copy of this YearMonth wrapping
* within this field if the maximum value is reached.
*
* The value will be added to this field. If the value is too large to be
* added solely to this field then it wraps within this field.
* Other fields are unaffected.
*
* For example,
* 2004-12 addWrapField one month returns 2004-01.
*
* The YearMonth attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param valueToAdd the value to add to the field in the copy
* @return a copy of the YearMonth with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public YearMonth addWrapFieldToCopy(int valueToAdd) {
int[] newValues = iBase.getValues();
newValues = getField().addWrapField(iBase, iFieldIndex, newValues, valueToAdd);
return new YearMonth(iBase, newValues);
}
//-----------------------------------------------------------------------
/**
* Sets this field in a copy of the YearMonth.
*
* The YearMonth attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param value the value to set the field in the copy to
* @return a copy of the YearMonth with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public YearMonth setCopy(int value) {
int[] newValues = iBase.getValues();
newValues = getField().set(iBase, iFieldIndex, newValues, value);
return new YearMonth(iBase, newValues);
}
/**
* Sets this field in a copy of the YearMonth to a parsed text value.
*
* The YearMonth attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param text the text value to set
* @param locale optional locale to use for selecting a text symbol
* @return a copy of the YearMonth with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public YearMonth setCopy(String text, Locale locale) {
int[] newValues = iBase.getValues();
newValues = getField().set(iBase, iFieldIndex, newValues, text, locale);
return new YearMonth(iBase, newValues);
}
/**
* Sets this field in a copy of the YearMonth to a parsed text value.
*
* The YearMonth attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param text the text value to set
* @return a copy of the YearMonth with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public YearMonth setCopy(String text) {
return setCopy(text, null);
}
}
}