Class ZoneOffset.Rule

java.lang.Object

javax.time.calendar.CalendricalRule<ZoneOffset>

javax.time.calendar.ZoneOffset.Rule

All Implemented Interfaces:

Serializable, Comparable<CalendricalRule<?>>, Comparator<Calendrical>

Enclosing class:

ZoneOffset

static final class ZoneOffset.Rule
extends CalendricalRule<ZoneOffset>
implements Serializable

Rule implementation.

Field Summary

Fields

Modifier and Type	Field	Description
private static final CalendricalRule<ZoneOffset>	INSTANCE
private static final long	serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Rule()

Method Summary

Modifier and Type	Method	Description
protected ZoneOffset	derive(Calendrical calendrical)	Derives the value of this rule from a calendrical.
private Object	readResolve()

Methods inherited from class CalendricalRule

compare, compareTo, deriveValueFor, deriveValueFrom, equals, getChronology, getID, getName, getPeriodRange, getPeriodUnit, getReifiedType, getValue, getValueChecked, hashCode, interpret, interpretValue, merge, reify, toString

Methods inherited from class Object

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

Methods inherited from interface Comparator

reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Details

INSTANCE

private static final CalendricalRule<ZoneOffset> INSTANCE

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

Constructor Details

Rule

private Rule()

Method Details

readResolve

private Object readResolve()

derive

protected ZoneOffset derive(Calendrical calendrical)

Description copied from class: CalendricalRule

Derives the value of this rule from a calendrical.

This method derives the value for this field from other fields in the calendrical without directly querying the calendrical for the value.

For example, if this field is quarter-of-year, then the value can be derived from month-of-year.

The implementation only needs to derive the value based on its immediate parents. The use of Calendrical.get(CalendricalRule) will extract any further parents on demand.

A typical implementation of this method obtains the parent value and performs a calculation. For example, here is a simple implementation for the quarter-of-year field:

Integer moyVal = calendrical.get(ISOChronology.monthOfYearRule());
return (moyVal != null ? ((moyVal - 1) % 4) + 1) : null;

This method is designed to be overridden in subclasses. The subclass implementation must be thread-safe. The subclass implementation must not request the value of this rule from the specified calendrical, otherwise a stack overflow error will occur.

Overrides:

derive in class CalendricalRule<ZoneOffset>

Parameters:

calendrical - the calendrical to derive from, not null

Returns:

the derived value, null if unable to derive