Package one.util.streamex
Class HeadTailSpliterator<T,U>
java.lang.Object
java.util.Spliterators.AbstractSpliterator<U>
one.util.streamex.HeadTailSpliterator<T,U>
- All Implemented Interfaces:
Spliterator<U>
,Internals.TailSpliterator<U>
final class HeadTailSpliterator<T,U>
extends Spliterators.AbstractSpliterator<U>
implements Internals.TailSpliterator<U>
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Nested Class Summary
Nested classes/interfaces inherited from interface java.util.Spliterator
Spliterator.OfDouble, Spliterator.OfInt, Spliterator.OfLong, Spliterator.OfPrimitive<T extends Object,
T_CONS extends Object, T_SPLITR extends Spliterator.OfPrimitive<T, T_CONS, T_SPLITR>> -
Field Summary
FieldsModifier and TypeFieldDescription(package private) StreamContext
private Spliterator<T>
private Spliterator<U>
Fields inherited from interface java.util.Spliterator
CONCURRENT, DISTINCT, IMMUTABLE, NONNULL, ORDERED, SIZED, SORTED, SUBSIZED
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Constructor Summary
ConstructorsConstructorDescriptionHeadTailSpliterator
(Spliterator<T> source, BiFunction<? super T, ? super StreamEx<T>, ? extends Stream<U>> mapper, Supplier<? extends Stream<U>> emptyMapper) -
Method Summary
Modifier and TypeMethodDescriptionlong
forEachOrTail
(Consumer<? super U> action) Traverses this spliterator and returns null if traversal is completed or tail spliterator if it must be used for further traversal.void
forEachRemaining
(Consumer<? super U> action) private boolean
init()
boolean
tryAdvance
(Consumer<? super U> action) tryAdvanceOrTail
(Consumer<? super U> action) Either advances by one element feeding it to consumer and returns this or returns tail spliterator (this spliterator becomes invalid and tail must be used instead) or returns null if traversal finished.Methods inherited from class java.util.Spliterators.AbstractSpliterator
characteristics, trySplit
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.util.Spliterator
characteristics, getComparator, getExactSizeIfKnown, hasCharacteristics, trySplit
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Field Details
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source
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mapper
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emptyMapper
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target
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context
StreamContext context
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Constructor Details
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HeadTailSpliterator
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Method Details
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tryAdvance
- Specified by:
tryAdvance
in interfaceSpliterator<T>
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tryAdvanceOrTail
Description copied from interface:Internals.TailSpliterator
Either advances by one element feeding it to consumer and returns this or returns tail spliterator (this spliterator becomes invalid and tail must be used instead) or returns null if traversal finished.- Specified by:
tryAdvanceOrTail
in interfaceInternals.TailSpliterator<T>
- Parameters:
action
- to feed the next element into- Returns:
- tail spliterator, this or null
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forEachRemaining
- Specified by:
forEachRemaining
in interfaceSpliterator<T>
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forEachOrTail
Description copied from interface:Internals.TailSpliterator
Traverses this spliterator and returns null if traversal is completed or tail spliterator if it must be used for further traversal.- Specified by:
forEachOrTail
in interfaceInternals.TailSpliterator<T>
- Parameters:
action
- to feed the elements into- Returns:
- tail spliterator or null (never returns this)
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init
private boolean init() -
estimateSize
public long estimateSize()- Specified by:
estimateSize
in interfaceSpliterator<T>
- Overrides:
estimateSize
in classSpliterators.AbstractSpliterator<U>
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