org.joda.time
Class LocalDateTime.Property

java.lang.Object
  org.joda.time.field.AbstractReadableInstantFieldProperty
      org.joda.time.LocalDateTime.Property

All Implemented Interfaces:

Serializable

Enclosing class:

LocalDateTime

public static final class LocalDateTime.Property
extends AbstractReadableInstantFieldProperty

LocalDateTime.Property binds a LocalDateTime to a DateTimeField allowing powerful datetime functionality to be easily accessed.

The simplest use of this class is as an alternative get method, here used to get the year '1972' (as an int) and the month 'December' (as a String).

 LocalDateTime dt = new LocalDateTime(1972, 12, 3, 0, 0);
 int year = dt.year().get();
 String monthStr = dt.month().getAsText();
 

Methods are also provided that allow date modification. These return new instances of LocalDateTime - they do not modify the original. The example below yields two independent immutable date objects 20 years apart.

 LocalDateTime dt = new LocalDateTime(1972, 12, 3, 0, 0);
 LocalDateTime dt1920 = dt.year().setCopy(1920);
 

LocalDateTime.Property itself is thread-safe and immutable, as well as the LocalDateTime being operated on.

Since:

1.3

Author:

Stephen Colebourne, Brian S O'Neill

See Also:

Serialized Form

Method Summary

LocalDateTime	addToCopy(int value) Adds to this field in a copy of this LocalDateTime.
LocalDateTime	addToCopy(long value) Adds to this field in a copy of this LocalDateTime.
LocalDateTime	addWrapFieldToCopy(int value) Adds to this field, possibly wrapped, in a copy of this LocalDateTime.
protected Chronology	getChronology() Gets the chronology of the datetime that this property is linked to.
DateTimeField	getField() Gets the field being used.
LocalDateTime	getLocalDateTime() Gets the LocalDateTime object linked to this property.
protected long	getMillis() Gets the milliseconds of the datetime that this property is linked to.
LocalDateTime	roundCeilingCopy() Rounds to the highest whole unit of this field on a copy of this LocalDateTime.
LocalDateTime	roundFloorCopy() Rounds to the lowest whole unit of this field on a copy of this LocalDateTime.
LocalDateTime	roundHalfCeilingCopy() Rounds to the nearest whole unit of this field on a copy of this LocalDateTime, favoring the ceiling if halfway.
LocalDateTime	roundHalfEvenCopy() Rounds to the nearest whole unit of this field on a copy of this LocalDateTime.
LocalDateTime	roundHalfFloorCopy() Rounds to the nearest whole unit of this field on a copy of this LocalDateTime, favoring the floor if halfway.
LocalDateTime	setCopy(int value) Sets this field in a copy of the LocalDateTime.
LocalDateTime	setCopy(String text) Sets this field in a copy of the LocalDateTime to a parsed text value.
LocalDateTime	setCopy(String text, Locale locale) Sets this field in a copy of the LocalDateTime to a parsed text value.
LocalDateTime	withMaximumValue() Returns a new LocalDateTime with this field set to the maximum value for this field.
LocalDateTime	withMinimumValue() Returns a new LocalDateTime with this field set to the minimum value for this field.

Methods inherited from class org.joda.time.field.AbstractReadableInstantFieldProperty

compareTo, compareTo, equals, get, getAsShortText, getAsShortText, getAsString, getAsText, getAsText, getDifference, getDifferenceAsLong, getDurationField, getFieldType, getLeapAmount, getLeapDurationField, getMaximumShortTextLength, getMaximumTextLength, getMaximumValue, getMaximumValueOverall, getMinimumValue, getMinimumValueOverall, getName, getRangeDurationField, hashCode, isLeap, remainder, toInterval, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getField

public DateTimeField getField()

Gets the field being used.

Specified by:

getField in class AbstractReadableInstantFieldProperty

Returns:

the field

getMillis

protected long getMillis()

Gets the milliseconds of the datetime that this property is linked to.

Specified by:

getMillis in class AbstractReadableInstantFieldProperty

Returns:

the milliseconds

getChronology

protected Chronology getChronology()

Gets the chronology of the datetime that this property is linked to.

Overrides:

getChronology in class AbstractReadableInstantFieldProperty

Returns:

the chronology

Since:

1.4

getLocalDateTime

public LocalDateTime getLocalDateTime()

Gets the LocalDateTime object linked to this property.

Returns:

the linked LocalDateTime

addToCopy

public LocalDateTime addToCopy(int value)

Adds to this field in a copy of this LocalDateTime.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

value - the value to add to the field in the copy

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

addToCopy

public LocalDateTime addToCopy(long value)

Adds to this field in a copy of this LocalDateTime.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

value - the value to add to the field in the copy

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

addWrapFieldToCopy

public LocalDateTime addWrapFieldToCopy(int value)

Adds to this field, possibly wrapped, in a copy of this LocalDateTime. A field wrapped operation only changes this field. Thus 31st January addWrapField one day goes to the 1st January.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

value - the value to add to the field in the copy

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

setCopy

public LocalDateTime setCopy(int value)

Sets this field in a copy of the LocalDateTime.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

value - the value to set the field in the copy to

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

setCopy

public LocalDateTime setCopy(String text,
                             Locale locale)

Sets this field in a copy of the LocalDateTime to a parsed text value.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

text - the text value to set

locale - optional locale to use for selecting a text symbol

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the text value isn't valid

setCopy

public LocalDateTime setCopy(String text)

Sets this field in a copy of the LocalDateTime to a parsed text value.

The LocalDateTime attached to this property is unchanged by this call.

Parameters:

text - the text value to set

Returns:

a copy of the LocalDateTime with the field value changed

Throws:

IllegalArgumentException - if the text value isn't valid

withMaximumValue

public LocalDateTime withMaximumValue()

Returns a new LocalDateTime with this field set to the maximum value for this field.

This operation is useful for obtaining a LocalDateTime on the last day of the month, as month lengths vary.

 LocalDateTime lastDayOfMonth = dt.dayOfMonth().withMaximumValue();
 

The LocalDateTime attached to this property is unchanged by this call.

Returns:

a copy of the LocalDateTime with this field set to its maximum

withMinimumValue

public LocalDateTime withMinimumValue()

Returns a new LocalDateTime with this field set to the minimum value for this field.

The LocalDateTime attached to this property is unchanged by this call.

Returns:

a copy of the LocalDateTime with this field set to its minimum

roundFloorCopy

public LocalDateTime roundFloorCopy()

Rounds to the lowest whole unit of this field on a copy of this LocalDateTime.

For example, rounding floor on the hourOfDay field of a LocalDateTime where the time is 10:30 would result in new LocalDateTime with the time of 10:00.

Returns:

a copy of the LocalDateTime with the field value changed

roundCeilingCopy

public LocalDateTime roundCeilingCopy()

Rounds to the highest whole unit of this field on a copy of this LocalDateTime.

For example, rounding floor on the hourOfDay field of a LocalDateTime where the time is 10:30 would result in new LocalDateTime with the time of 11:00.

Returns:

a copy of the LocalDateTime with the field value changed

roundHalfFloorCopy

public LocalDateTime roundHalfFloorCopy()

Rounds to the nearest whole unit of this field on a copy of this LocalDateTime, favoring the floor if halfway.

Returns:

a copy of the LocalDateTime with the field value changed

roundHalfCeilingCopy

public LocalDateTime roundHalfCeilingCopy()

Rounds to the nearest whole unit of this field on a copy of this LocalDateTime, favoring the ceiling if halfway.

Returns:

a copy of the LocalDateTime with the field value changed

roundHalfEvenCopy

public LocalDateTime roundHalfEvenCopy()

Rounds to the nearest whole unit of this field on a copy of this LocalDateTime. If halfway, the ceiling is favored over the floor only if it makes this field's value even.

Returns:

a copy of the LocalDateTime with the field value changed