org.joda.time.base
Class AbstractPeriod

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

All Implemented Interfaces:

ReadablePeriod

Direct Known Subclasses:

BasePeriod

public abstract class AbstractPeriod
extends Object
implements ReadablePeriod

AbstractPeriod provides the common behaviour for period classes.

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

AbstractPeriod subclasses may be mutable and not thread-safe.

Since:

1.0

Author:

Brian S O'Neill, Stephen Colebourne

Constructor Summary

protected

AbstractPeriod() Constructor.

Method Summary

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 one of the fields.
DurationFieldType	getFieldType(int index) Gets the field type at the specified index.
DurationFieldType[]	getFieldTypes() Gets an array of the field types that this period supports.
int[]	getValues() Gets an array of the value of each of the fields that this period supports.
int	hashCode() Gets a hash code for the period as defined by ReadablePeriod.
int	indexOf(DurationFieldType type) Gets the index of the field in this period.
boolean	isSupported(DurationFieldType type) Checks whether the field specified is supported by this period.
int	size() Gets the number of fields that this period supports.
MutablePeriod	toMutablePeriod() Get this object as a MutablePeriod.
Period	toPeriod() Get this period as an immutable Period object.
String	toString() Gets the value as a String in the ISO8601 duration format.
String	toString(PeriodFormatter formatter) Uses the specified formatter to convert this period to a String.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.joda.time.ReadablePeriod

getPeriodType, getValue

Constructor Detail

AbstractPeriod

protected AbstractPeriod()

Constructor.

Method Detail

size

public int size()

Gets the number of fields that this period supports.

Specified by:

size in interface ReadablePeriod

Returns:

the number of fields supported

Since:

2.0 (previously on BasePeriod)

getFieldType

public DurationFieldType getFieldType(int index)

Gets the field type at the specified index.

Specified by:

getFieldType in interface ReadablePeriod

Parameters:

index - the index to retrieve

Returns:

the field at the specified index

Throws:

IndexOutOfBoundsException - if the index is invalid

Since:

2.0 (previously on BasePeriod)

getFieldTypes

public DurationFieldType[] getFieldTypes()

Gets an array of the field types that this period supports.

The fields are returned largest to smallest, for example Hours, Minutes, Seconds.

Returns:

the fields supported in an array that may be altered, largest to smallest

getValues

public int[] getValues()

Gets an array of the value of each of the fields that this period supports.

The fields are returned largest to smallest, for example Hours, Minutes, Seconds. Each value corresponds to the same array index as getFields()

Returns:

the current values of each field in an array that may be altered, largest to smallest

get

public int get(DurationFieldType type)

Gets the value of one of the fields.

If the field type specified is not supported by the period 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 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

indexOf

public int indexOf(DurationFieldType type)

Gets the index of the field in this period.

Parameters:

type - the type to check, may be null which returns -1

Returns:

the index of -1 if not supported

toPeriod

public Period toPeriod()

Get this period as an immutable Period object.

Specified by:

toPeriod in interface ReadablePeriod

Returns:

a Period using the same field set and values

toMutablePeriod

public MutablePeriod toMutablePeriod()

Get this object as a MutablePeriod.

This will always return a new MutablePeriod with the same fields.

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.

Note that a period of 1 day is not equal to a period of 24 hours, nor is 1 hour equal to 60 minutes. Only periods with the same amount in each field are equal.

This is because periods represent an abstracted definition of a time period (eg. a day may not actually be 24 hours, it might be 23 or 25 at daylight savings boundary).

To compare the actual duration of two periods, convert both to Durations, an operation that emphasises that the result may differ according to the date you choose.

Specified by:

equals in interface ReadablePeriod

Overrides:

equals in class Object

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

Overrides:

hashCode in class Object

Returns:

a hash code

toString

public String toString()

Gets the value as a String in the ISO8601 duration format.

For example, "P6H3M7S" represents 6 hours, 3 minutes, 7 seconds.

For more control over the output, see PeriodFormatterBuilder.

Specified by:

toString in interface ReadablePeriod

Overrides:

toString in class Object

Returns:

the value as an ISO8601 string

toString

public String toString(PeriodFormatter formatter)

Uses the specified formatter to convert this period to a String.

Parameters:

formatter - the formatter to use, null means use toString().

Returns:

the formatted string

Since:

1.5