org.joda.time
Class DateMidnight.Property

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

All Implemented Interfaces:

Serializable

Enclosing class:

DateMidnight

public static final class DateMidnight.Property
extends AbstractReadableInstantFieldProperty

DateMidnight.Property binds a DateMidnight 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).

 DateMidnight dt = new DateMidnight(1972, 12, 3);
 int year = dt.year().get();
 String monthStr = dt.monthOfYear().getAsText();
 

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.

 DateMidnight dt = new DateMidnight(1972, 12, 3);
 DateMidnight dt20 = dt.year().addToCopy(20);
 

Serious modification of dates (ie. more than just changing one or two fields) should use the MutableDateTime class.

DateMidnight.Property itself is thread-safe and immutable.

Since:

1.0

Author:

Stephen Colebourne, Brian S O'Neill

See Also:

Serialized Form

Method Summary

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

getDateMidnight

public DateMidnight getDateMidnight()

Gets the datetime being used.

Returns:

the datetime

addToCopy

public DateMidnight addToCopy(int value)

Adds to this field in a copy of this DateMidnight.

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.

Parameters:

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

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

addToCopy

public DateMidnight addToCopy(long value)

Adds to this field in a copy of this DateMidnight.

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.

Parameters:

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

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

addWrapFieldToCopy

public DateMidnight addWrapFieldToCopy(int 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.

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.

Parameters:

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

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

setCopy

public DateMidnight setCopy(int value)

Sets this field in a copy of the DateMidnight.

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.

Parameters:

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

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the value isn't valid

setCopy

public DateMidnight setCopy(String text,
                            Locale locale)

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

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.

Parameters:

text - the text value to set

locale - optional locale to use for selecting a text symbol

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the text value isn't valid

setCopy

public DateMidnight setCopy(String text)

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

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.

Parameters:

text - the text value to set

Returns:

a copy of the DateMidnight with the field value changed

Throws:

IllegalArgumentException - if the text value isn't valid

withMaximumValue

public DateMidnight withMaximumValue()

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

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

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

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

Returns:

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

Since:

1.2

withMinimumValue

public DateMidnight withMinimumValue()

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

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

Returns:

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

Since:

1.2

roundFloorCopy

public DateMidnight roundFloorCopy()

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

Returns:

a copy of the DateMidnight with the field value changed

roundCeilingCopy

public DateMidnight roundCeilingCopy()

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

Returns:

a copy of the DateMidnight with the field value changed

roundHalfFloorCopy

public DateMidnight roundHalfFloorCopy()

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

Returns:

a copy of the DateMidnight with the field value changed

roundHalfCeilingCopy

public DateMidnight roundHalfCeilingCopy()

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

Returns:

a copy of the DateMidnight with the field value changed

roundHalfEvenCopy

public DateMidnight roundHalfEvenCopy()

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.

Returns:

a copy of the DateMidnight with the field value changed