org.joda.time.field
Class OffsetDateTimeField

java.lang.Object
  org.joda.time.DateTimeField
      org.joda.time.field.BaseDateTimeField
          org.joda.time.field.DecoratedDateTimeField
              org.joda.time.field.OffsetDateTimeField

public class OffsetDateTimeField
extends DecoratedDateTimeField

Generic offset adjusting datetime field.

OffsetDateTimeField is thread-safe and immutable.

Since:

1.0

Author:

Brian S O'Neill

Constructor Summary

OffsetDateTimeField(DateTimeField field, DateTimeFieldType type, int offset)
Constructor.

OffsetDateTimeField(DateTimeField field, DateTimeFieldType type, int offset, int minValue, int maxValue)
Constructor.

OffsetDateTimeField(DateTimeField field, int offset)
Constructor.

Method Summary

long	add(long instant, int amount) Add the specified amount of offset units to the specified time instant.
long	add(long instant, long amount) Add the specified amount of offset units to the specified time instant.
long	addWrapField(long instant, int amount) Add to the offset component of the specified time instant, wrapping around within that component if necessary.
int	get(long instant) Get the amount of offset units from the specified time instant.
int	getLeapAmount(long instant) Gets the amount by which this field is 'leap' for the specified instant.
DurationField	getLeapDurationField() If this field were to leap, then it would be in units described by the returned duration.
int	getMaximumValue() Get the maximum value for the field.
int	getMinimumValue() Get the minimum value for the field.
int	getOffset() Returns the offset added to the field values.
boolean	isLeap(long instant) Returns whether this field is 'leap' for the specified instant.
long	remainder(long instant) Returns the fractional duration milliseconds of this field.
long	roundCeiling(long instant) Round to the highest whole unit of this field.
long	roundFloor(long instant) Round to the lowest whole unit of this field.
long	roundHalfCeiling(long instant) Round to the nearest whole unit of this field.
long	roundHalfEven(long instant) Round to the nearest whole unit of this field.
long	roundHalfFloor(long instant) Round to the nearest whole unit of this field.
long	set(long instant, int value) Set the specified amount of offset units to the specified time instant.

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

getDurationField, getRangeDurationField, getWrappedField, isLenient

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

add, addWrapField, addWrapPartial, convertText, getAsShortText, getAsShortText, getAsShortText, getAsShortText, getAsShortText, getAsText, getAsText, getAsText, getAsText, getAsText, getDifference, getDifferenceAsLong, getMaximumShortTextLength, getMaximumTextLength, getMaximumValue, getMaximumValue, getMaximumValue, getMinimumValue, getMinimumValue, getMinimumValue, getName, getType, isSupported, set, set, set, set, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OffsetDateTimeField

public OffsetDateTimeField(DateTimeField field,
                           int offset)

Constructor.

Parameters:

field - the field to wrap, like "year()".

offset - offset to add to field values

Throws:

IllegalArgumentException - if offset is zero

OffsetDateTimeField

public OffsetDateTimeField(DateTimeField field,
                           DateTimeFieldType type,
                           int offset)

Constructor.

Parameters:

field - the field to wrap, like "year()".

type - the field type this field actually uses

offset - offset to add to field values

Throws:

IllegalArgumentException - if offset is zero

OffsetDateTimeField

public OffsetDateTimeField(DateTimeField field,
                           DateTimeFieldType type,
                           int offset,
                           int minValue,
                           int maxValue)

Constructor.

Parameters:

field - the field to wrap, like "year()".

type - the field type this field actually uses

offset - offset to add to field values

minValue - minimum allowed value

maxValue - maximum allowed value

Throws:

IllegalArgumentException - if offset is zero

Method Detail

get

public int get(long instant)

Get the amount of offset units from the specified time instant.

Overrides:

get in class DecoratedDateTimeField

Parameters:

instant - the time instant in millis to query.

Returns:

the amount of units extracted from the input.

add

public long add(long instant,
                int amount)

Add the specified amount of offset units to the specified time instant. The amount added may be negative.

Overrides:

add in class BaseDateTimeField

Parameters:

instant - the time instant in millis to update.

amount - the amount of units to add (can be negative).

Returns:

the updated time instant.

add

public long add(long instant,
                long amount)

Add the specified amount of offset units to the specified time instant. The amount added may be negative.

Overrides:

add in class BaseDateTimeField

Parameters:

instant - the time instant in millis to update.

amount - the amount of units to add (can be negative).

Returns:

the updated time instant.

See Also:

BaseDateTimeField.add(long,int)

addWrapField

public long addWrapField(long instant,
                         int amount)

Add to the offset component of the specified time instant, wrapping around within that component if necessary.

Overrides:

addWrapField in class BaseDateTimeField

Parameters:

instant - the time instant in millis to update.

amount - the amount of units to add (can be negative).

Returns:

the updated time instant.

set

public long set(long instant,
                int value)

Set the specified amount of offset units to the specified time instant.

Overrides:

set in class DecoratedDateTimeField

Parameters:

instant - the time instant in millis to update.

value - value of units to set.

Returns:

the updated time instant.

Throws:

IllegalArgumentException - if value is too large or too small.

isLeap

public boolean isLeap(long instant)

Description copied from class: BaseDateTimeField

Returns whether this field is 'leap' for the specified instant.

For example, a leap year would return true, a non leap year would return false.

This implementation returns false.

Overrides:

isLeap in class BaseDateTimeField

Parameters:

instant - the instant to check for leap status

Returns:

true if the field is 'leap'

getLeapAmount

public int getLeapAmount(long instant)

Description copied from class: BaseDateTimeField

Gets the amount by which this field is 'leap' for the specified instant.

For example, a leap year would return one, a non leap year would return zero.

This implementation returns zero.

Overrides:

getLeapAmount in class BaseDateTimeField

Parameters:

instant - the instant to check for leap status

Returns:

the amount, in units of the leap duration field, that the field is leap

getLeapDurationField

public DurationField getLeapDurationField()

Description copied from class: BaseDateTimeField

If this field were to leap, then it would be in units described by the returned duration. If this field doesn't ever leap, null is returned.

This implementation returns null.

Overrides:

getLeapDurationField in class BaseDateTimeField

Returns:

the leap duration field if field can be leap, null if it can't

getMinimumValue

public int getMinimumValue()

Get the minimum value for the field.

Overrides:

getMinimumValue in class DecoratedDateTimeField

Returns:

the minimum value

getMaximumValue

public int getMaximumValue()

Get the maximum value for the field.

Overrides:

getMaximumValue in class DecoratedDateTimeField

Returns:

the maximum value

roundFloor

public long roundFloor(long instant)

Description copied from class: BaseDateTimeField

Round to the lowest whole unit of this field. After rounding, the value of this field and all fields of a higher magnitude are retained. The fractional millis that cannot be expressed in whole increments of this field are set to minimum.

For example, a datetime of 2002-11-02T23:34:56.789, rounded to the lowest whole hour is 2002-11-02T23:00:00.000.

Overrides:

roundFloor in class DecoratedDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to round

Returns:

rounded milliseconds

roundCeiling

public long roundCeiling(long instant)

Description copied from class: BaseDateTimeField

Round to the highest whole unit of this field. The value of this field and all fields of a higher magnitude may be incremented in order to achieve this result. The fractional millis that cannot be expressed in whole increments of this field are set to minimum.

For example, a datetime of 2002-11-02T23:34:56.789, rounded to the highest whole hour is 2002-11-03T00:00:00.000.

The default implementation calls roundFloor, and if the instant is modified as a result, adds one field unit. Subclasses are encouraged to provide a more efficient implementation.

Overrides:

roundCeiling in class BaseDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to round

Returns:

rounded milliseconds

roundHalfFloor

public long roundHalfFloor(long instant)

Description copied from class: BaseDateTimeField

Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor or is exactly halfway, this function behaves like roundFloor. If the millisecond value is closer to the ceiling, this function behaves like roundCeiling.

Overrides:

roundHalfFloor in class BaseDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to round

Returns:

rounded milliseconds

roundHalfCeiling

public long roundHalfCeiling(long instant)

Description copied from class: BaseDateTimeField

Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor, this function behaves like roundFloor. If the millisecond value is closer to the ceiling or is exactly halfway, this function behaves like roundCeiling.

Overrides:

roundHalfCeiling in class BaseDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to round

Returns:

rounded milliseconds

roundHalfEven

public long roundHalfEven(long instant)

Description copied from class: BaseDateTimeField

Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor, this function behaves like roundFloor. If the millisecond value is closer to the ceiling, this function behaves like roundCeiling.

If the millisecond value is exactly halfway between the floor and ceiling, the ceiling is chosen over the floor only if it makes this field's value even.

Overrides:

roundHalfEven in class BaseDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to round

Returns:

rounded milliseconds

remainder

public long remainder(long instant)

Description copied from class: BaseDateTimeField

Returns the fractional duration milliseconds of this field. In other words, calling remainder returns the duration that roundFloor would subtract.

For example, on a datetime of 2002-11-02T23:34:56.789, the remainder by hour is 34 minutes and 56.789 seconds.

The default implementation computes instant - roundFloor(instant). Subclasses are encouraged to provide a more efficient implementation.

Overrides:

remainder in class BaseDateTimeField

Parameters:

instant - the milliseconds from 1970-01-01T00:00:00Z to get the remainder

Returns:

remainder duration, in milliseconds

getOffset

public int getOffset()

Returns the offset added to the field values.

Returns:

the offset