org.joda.time.base
Class BaseSingleFieldPeriod

java.lang.Object
  org.joda.time.base.BaseSingleFieldPeriod

All Implemented Interfaces:

Comparable, ReadablePeriod, Serializable

Direct Known Subclasses:

Days, Hours, Minutes, Months, Seconds, Weeks, Years

public abstract class BaseSingleFieldPeriod

extends Object

implements ReadablePeriod, Comparable, Serializable

BaseSingleFieldPeriod is an abstract implementation of ReadablePeriod that manages a single duration field, such as days or minutes.

This class should generally not be used directly by API users. The ReadablePeriod interface should be used when different kinds of period objects are to be referenced.

BaseSingleFieldPeriod subclasses may be mutable and not thread-safe.

Since:

1.4

Author:

Stephen Colebourne

See Also:

Serialized Form

Method Summary

int	compareTo(Object other) Compares this period to another object of the same class.
boolean	equals(Object period) Compares this object with the specified object for equality based on the value of each field.
int	get(DurationFieldType type) Gets the value of a duration field represented by this period.
abstract DurationFieldType	getFieldType() Gets the single duration field type.
DurationFieldType	getFieldType(int index) Gets the field type at the specified index.
abstract PeriodType	getPeriodType() Gets the period type which matches the duration field type.
int	getValue(int index) Gets the value at the specified index.
int	hashCode() Gets a hash code for the period as defined by ReadablePeriod.
boolean	isSupported(DurationFieldType type) Checks whether the duration field specified is supported by this period.
int	size() Gets the number of fields that this period supports, which is one.
MutablePeriod	toMutablePeriod() Get this object as a MutablePeriod.
Period	toPeriod() Get this period as an immutable Period object.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.joda.time.ReadablePeriod

toString

Method Detail

getFieldType

public abstract DurationFieldType getFieldType()

Gets the single duration field type.

Returns:

the duration field type, not null

getPeriodType

public abstract PeriodType getPeriodType()

Gets the period type which matches the duration field type.

Specified by:

getPeriodType in interface ReadablePeriod

Returns:

the period type, not null

size

public int size()

Gets the number of fields that this period supports, which is one.

Specified by:

size in interface ReadablePeriod

Returns:

the number of fields supported, which is one

getFieldType

public DurationFieldType getFieldType(int index)

Gets the field type at the specified index.

The only index supported by this period is zero which returns the field type of this class.

Specified by:

getFieldType in interface ReadablePeriod

Parameters:

index - the index to retrieve, which must be zero

Returns:

the field at the specified index

Throws:

IndexOutOfBoundsException - if the index is invalid

getValue

public int getValue(int index)

Gets the value at the specified index.

The only index supported by this period is zero.

Specified by:

getValue in interface ReadablePeriod

Parameters:

index - the index to retrieve, which must be zero

Returns:

the value of the field at the specified index

Throws:

IndexOutOfBoundsException - if the index is invalid

get

public int get(DurationFieldType type)

Gets the value of a duration field represented by this period.

If the field type specified does not match the type used by this class then zero is returned.

Specified by:

get in interface ReadablePeriod

Parameters:

type - the field type to query, null returns zero

Returns:

the value of that field, zero if field not supported

isSupported

public boolean isSupported(DurationFieldType type)

Checks whether the duration field specified is supported by this period.

Specified by:

isSupported in interface ReadablePeriod

Parameters:

type - the type to check, may be null which returns false

Returns:

true if the field is supported

toPeriod

public Period toPeriod()

Get this period as an immutable Period object. The period will use PeriodType.standard().

Specified by:

toPeriod in interface ReadablePeriod

Returns:

a Period representing the same number of days

toMutablePeriod

public MutablePeriod toMutablePeriod()

Get this object as a MutablePeriod.

This will always return a new MutablePeriod with the same fields. The period will use PeriodType.standard().

Specified by:

toMutablePeriod in interface ReadablePeriod

Returns:

a MutablePeriod using the same field set and values

equals

public boolean equals(Object period)

Compares this object with the specified object for equality based on the value of each field. All ReadablePeriod instances are accepted, but only those with a matching PeriodType can return true.

Specified by:

equals in interface ReadablePeriod

Parameters:

period - a readable period to check against

Returns:

true if all the field values are equal, false if not or the period is null or of an incorrect type

hashCode

public int hashCode()

Gets a hash code for the period as defined by ReadablePeriod.

Specified by:

hashCode in interface ReadablePeriod

Returns:

a hash code

compareTo

public int compareTo(Object other)

Compares this period to another object of the same class.

Specified by:

compareTo in interface Comparable

Parameters:

other - the other period, must not be null

Returns:

zero if equal, positive if greater, negative if less

Throws:

NullPointerException - if the other period is null

ClassCastException - if the other period is of a different type