public class MappingStepper<A,B> extends java.lang.Object implements Stepper<B>
Stepper.OfDoubleSpliterator, Stepper.OfIntSpliterator, Stepper.OfLongSpliterator, Stepper.OfSpliterator<A>, Stepper.UnboxingByteStepper, Stepper.UnboxingCharStepper, Stepper.UnboxingDoubleStepper, Stepper.UnboxingFloatStepper, Stepper.UnboxingIntStepper, Stepper.UnboxingLongStepper, Stepper.UnboxingShortStepper| Constructor and Description |
|---|
MappingStepper(Stepper<A> underlying,
scala.Function1<A,B> mapping) |
| Modifier and Type | Method and Description |
|---|---|
int |
characteristics()
Characteristics are bit flags that indicate runtime characteristics of this Stepper.
|
void |
foreach(scala.Function1<B,scala.runtime.BoxedUnit> f)
Applies
f to every remaining element in the collection. |
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.
|
B |
nextStep()
The next element traversed by this Stepper.
|
java.util.Spliterator<B> |
spliterator()
Returns this
Stepper as a java.util.Spliterator. |
Stepper<B> |
substep()
Attempt to split this
Stepper in half, with the new (returned) copy taking the first half
of the collection, and this one advancing to cover the second half. |
boolean |
tryStep(scala.Function1<B,scala.runtime.BoxedUnit> f)
If another element exists, apply `f` to it and return `true`; otherwise, return `false`.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitaccumulatepublic int characteristics()
StepperLike
- Distinct means that no duplicates exist
- Immutable means that the underlying collection is guaranteed not to change during traversal
- NonNull means that no nulls will be returned during traversal
- Sized means that the collection knows its exact size
- SubSized means that sub-Steppers created with substep() will also know their own size. SubSized steppers must also be Sized.
The Java flags CONCURRENT and SORTED are not supported; modification of a concurrency-aware underlying collection is not
guaranteed to be any safer than modification of any generic mutable collection, and if the underlying collection is ordered by
virtue of sorting, Stepper will not keep track of that fact.
characteristics in interface StepperLike<B,Stepper<B>>public void foreach(scala.Function1<B,scala.runtime.BoxedUnit> f)
StepperLikef to every remaining element in the collection.
This is a terminal operation.foreach in interface StepperLike<B,Stepper<B>>f - (undocumented)public boolean hasStep()
StepperLikehasStep in interface StepperLike<B,Stepper<B>>public long knownSize()
StepperLikeknownSize in interface StepperLike<B,Stepper<B>>public B nextStep()
StepperLikenextStep() 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.nextStep in interface StepperLike<B,Stepper<B>>public java.util.Spliterator<B> spliterator()
StepperLikeStepper as a java.util.Spliterator.
This is a terminal operation.spliterator in interface StepperLike<B,Stepper<B>>public Stepper<B> substep()
StepperLikeStepper in half, with the new (returned) copy taking the first half
of the collection, and this one advancing to cover the second half. If subdivision is not
possible or not advisable, substep() will return null.substep in interface StepperLike<B,Stepper<B>>public boolean tryStep(scala.Function1<B,scala.runtime.BoxedUnit> f)
StepperLiketryStep in interface StepperLike<B,Stepper<B>>