Class CopticChronology.YearRule
- java.lang.Object
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- javax.time.calendar.CalendricalRule<T>
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- javax.time.calendar.DateTimeFieldRule<java.lang.Integer>
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- javax.time.i18n.CopticChronology.YearRule
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<CalendricalRule<?>>
,java.util.Comparator<Calendrical>
- Enclosing class:
- CopticChronology
private static final class CopticChronology.YearRule extends DateTimeFieldRule<java.lang.Integer> implements java.io.Serializable
Rule implementation.
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Nested Class Summary
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Nested classes/interfaces inherited from class javax.time.calendar.DateTimeFieldRule
DateTimeFieldRule.TextStore
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Field Summary
Fields Modifier and Type Field Description private static DateTimeFieldRule<java.lang.Integer>
INSTANCE
Singleton instance.private static long
serialVersionUID
A serialization identifier for this class.
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Constructor Summary
Constructors Modifier Constructor Description private
YearRule()
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected java.lang.Integer
derive(Calendrical calendrical)
Derives the value of this rule from a calendrical.protected void
merge(CalendricalMerger merger)
Merges this field with other fields to form higher level fields.private java.lang.Object
readResolve()
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Methods inherited from class javax.time.calendar.DateTimeFieldRule
checkValue, checkValue, convertFractionToInt, convertIntToFraction, convertIntToValue, convertValueToInt, createTextStores, getInt, getInteger, getLargestMinimumValue, getMaximumValue, getMaximumValue, getMinimumValue, getMinimumValue, getSmallestMaximumValue, getText, getTextStore, isFixedValueSet, isValidValue, isValidValue
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Methods inherited from class javax.time.calendar.CalendricalRule
compare, compareTo, deriveValueFor, deriveValueFrom, equals, getChronology, getID, getName, getPeriodRange, getPeriodUnit, getReifiedType, getValue, getValueChecked, hashCode, interpret, reify, toString
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Field Detail
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INSTANCE
private static final DateTimeFieldRule<java.lang.Integer> INSTANCE
Singleton instance.
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serialVersionUID
private static final long serialVersionUID
A serialization identifier for this class.- See Also:
- Constant Field Values
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Method Detail
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readResolve
private java.lang.Object readResolve()
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derive
protected java.lang.Integer 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(javax.time.calendar.CalendricalRule<T>)
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 classCalendricalRule<java.lang.Integer>
- Parameters:
calendrical
- the calendrical to derive from, not null- Returns:
- the derived value, null if unable to derive
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merge
protected void merge(CalendricalMerger merger)
Description copied from class:CalendricalRule
Merges this field with other fields to form higher level fields.The aim of this method is to assist in the process of extracting the most date-time information possible from a map of field-value pairs. The merging process is controlled by the mutable merger instance and the input and output of the this merge are held there.
Subclasses that override this method may use methods on the merger to obtain the values to merge. The value is guaranteed to be available for this field if this method is called.
If the override successfully merged some fields then the following must be performed. The merged field must be stored using
CalendricalMerger.storeMerged(javax.time.calendar.CalendricalRule<T>, T)
. Each field used in the merge must be marked as being used by callingCalendricalMerger.removeProcessed(javax.time.calendar.CalendricalRule<?>)
.An example to merge two fields into one - hour of AM/PM and AM/PM:
Integer hapVal = merger.getValue(ISOChronology.hourOfAmPmRule()); if (hapVal != null) { AmPmOfDay amPm = merger.getValue(this); int hourOfDay = MathUtils.safeAdd(MathUtils.safeMultiply(amPm, 12), hapVal); merger.storeMerged(ISOChronology.hourOfDayRule(), hourOfDay); merger.removeProcessed(this); merger.removeProcessed(ISOChronology.hourOfAmPmRule()); }
- Overrides:
merge
in classCalendricalRule<java.lang.Integer>
- Parameters:
merger
- the merger instance controlling the merge process, not null
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