net.time4j.tz.model

Class TransitionModel

java.lang.Object

net.time4j.tz.model.TransitionModel

All Implemented Interfaces:

Serializable, TransitionHistory

public abstract class TransitionModel
extends Object
implements TransitionHistory, Serializable

Factory class for creating zonal transition histories.

Since:

2.2

Author:

Meno Hochschild

Concurrency:

This class is immutable and can be used by multiple threads in parallel.

Method Summary

Modifier and Type	Method and Description
boolean	hasNegativeDST() This method is only a performance indicator and determines if negative daylight savings exist at all in this model.
boolean	isEmpty() Determines if this history does not have any transitions.
static TransitionHistory	of(List<ZonalTransition> transitions) Creates a new array-based and finite transition history.
static TransitionHistory	of(ZonalOffset standardOffset, List<DaylightSavingRule> rules) Creates a new rule-based transition history.
static TransitionHistory	of(ZonalOffset initialOffset, List<ZonalTransition> transitions, List<DaylightSavingRule> rules) Creates a transition history of both history transitions and rules for future transitions as well.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.time4j.tz.TransitionHistory

dump, findConflictTransition, findNextTransition, findPreviousTransition, findStartTransition, getConflictTransition, getInitialOffset, getStartTransition, getStdTransitions, getTransitions, getValidOffsets

Method Detail

of

public static TransitionHistory of(List<ZonalTransition> transitions)

Creates a new array-based and finite transition history.

Parameters:

transitions - list of zonal transitions

Returns:

new transition history

Throws:

IllegalArgumentException - in any case of inconsistencies or if there are no transitions at all

Since:

2.2

of

public static TransitionHistory of(ZonalOffset standardOffset,
                                   List<DaylightSavingRule> rules)

Creates a new rule-based transition history.

Parameters:

standardOffset - standard offset

rules - list of daylight saving rules

Returns:

new transition history

Throws:

IllegalArgumentException - in any case of inconsistencies or if there are more than 127 rules

Since:

2.2

of

public static TransitionHistory of(ZonalOffset initialOffset,
                                   List<ZonalTransition> transitions,
                                   List<DaylightSavingRule> rules)

Creates a transition history of both history transitions and rules for future transitions as well.

Parameters:

initialOffset - initial offset

transitions - list of zonal transitions

rules - list of daylight saving rules

Returns:

new transition history

Throws:

IllegalArgumentException - in any case of inconsistencies or if there are more than 127 rules

Since:

2.2

isEmpty

public boolean isEmpty()

Description copied from interface: TransitionHistory

Determines if this history does not have any transitions.

Specified by:

isEmpty in interface TransitionHistory

Returns:

true if there are no transitions else false

hasNegativeDST

public boolean hasNegativeDST()

This method is only a performance indicator and determines if negative daylight savings exist at all in this model.

The standard implementation obtains the value false.

Returns:

boolean

Since:

5.0