scala.compat.java8.collectionImpl

Interface TryStepper<A>

All Superinterfaces:

Stepper<A>, StepperLike<A,TryStepper<A>>

public interface TryStepper<A>
extends Stepper<A>, StepperLike<A,TryStepper<A>>

This trait indicates that a Stepper will implement hasNext and nextStep by caching applications of tryStep. Subclasses must implement tryUncached instead of tryStep, and should leave it protected, and must implement knownUncachedSize instead of knownSize. For speed, foreachUncached may also be overridden. It is recommended that all of the Uncached methods be left protected.

Nested Class Summary

Nested classes/interfaces inherited from interface scala.compat.java8.collectionImpl.Stepper

Stepper.UnboxingByteStepper, Stepper.UnboxingCharStepper, Stepper.UnboxingDoubleStepper, Stepper.UnboxingFloatStepper, Stepper.UnboxingIntStepper, Stepper.UnboxingLongStepper, Stepper.UnboxingShortStepper

Method Summary

Modifier and Type	Method and Description
void	foreach(scala.Function1<A,scala.runtime.BoxedUnit> f) Applies f to every remaining element in the collection.
void	foreachUncached(scala.Function1<A,scala.runtime.BoxedUnit> f)
boolean	hasStep() `true` if there are more elements to step through, `false` if not.
long	knownSize() Returns the size of the collection, if known exactly, or `-1` if not.
long	knownUncachedSize()
boolean	load()
A	myCache()
boolean	myCacheIsFull()
A	nextStep() The next element traversed by this Stepper.
java.util.Spliterator<A>	spliterator() Returns this Stepper as a java.util.Spliterator.
boolean	tryStep(scala.Function1<A,scala.runtime.BoxedUnit> f) If another element exists, apply `f` to it and return `true`; otherwise, return `false`.
boolean	tryUncached(scala.Function1<A,scala.runtime.BoxedUnit> f)

Methods inherited from interface scala.compat.java8.collectionImpl.Stepper

accumulate

Methods inherited from interface scala.compat.java8.collectionImpl.StepperLike

anticipateParallelism, characteristics, count, count, exists, find, fold, foldTo, iterator, reduce, substep, to

Method Detail

foreach

void foreach(scala.Function1<A,scala.runtime.BoxedUnit> f)

Description copied from interface: StepperLike

Applies f to every remaining element in the collection. This is a terminal operation.

Specified by:

foreach in interface StepperLike<A,TryStepper<A>>

Parameters:

f - (undocumented)

foreachUncached

void foreachUncached(scala.Function1<A,scala.runtime.BoxedUnit> f)

hasStep

boolean hasStep()

Description copied from interface: StepperLike

`true` if there are more elements to step through, `false` if not.

Specified by:

hasStep in interface StepperLike<A,TryStepper<A>>

knownSize

long knownSize()

Description copied from interface: StepperLike

Returns the size of the collection, if known exactly, or `-1` if not.

Specified by:

knownSize in interface StepperLike<A,TryStepper<A>>

knownUncachedSize

long knownUncachedSize()

load

boolean load()

myCache

A myCache()

myCacheIsFull

boolean myCacheIsFull()

nextStep

A nextStep()

Description copied from interface: StepperLike

The next element traversed by this Stepper. nextStep() throws an exception if no elements exist, so check hasStep immediately prior to calling. Note that tryStep also consumes an element, so the result of hasStep will be invalid after tryStep is called.

Specified by:

nextStep in interface StepperLike<A,TryStepper<A>>

Returns:

(undocumented)

spliterator

java.util.Spliterator<A> spliterator()

Description copied from interface: StepperLike

Returns this Stepper as a java.util.Spliterator. This is a terminal operation.

Specified by:

spliterator in interface StepperLike<A,TryStepper<A>>

Returns:

(undocumented)

tryStep

boolean tryStep(scala.Function1<A,scala.runtime.BoxedUnit> f)

Description copied from interface: StepperLike

If another element exists, apply `f` to it and return `true`; otherwise, return `false`.

Specified by:

tryStep in interface StepperLike<A,TryStepper<A>>

tryUncached

boolean tryUncached(scala.Function1<A,scala.runtime.BoxedUnit> f)