Class MaybeCount<T>
- java.lang.Object
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- io.reactivex.rxjava3.core.Single<java.lang.Long>
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- io.reactivex.rxjava3.internal.operators.maybe.MaybeCount<T>
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- Type Parameters:
T
- the source value type
- All Implemented Interfaces:
SingleSource<java.lang.Long>
,HasUpstreamMaybeSource<T>
public final class MaybeCount<T> extends Single<java.lang.Long> implements HasUpstreamMaybeSource<T>
Signals 1L if the source signalled an item or 0L if the source is empty.
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Nested Class Summary
Nested Classes Modifier and Type Class Description (package private) static class
MaybeCount.CountMaybeObserver
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Field Summary
Fields Modifier and Type Field Description (package private) MaybeSource<T>
source
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Constructor Summary
Constructors Constructor Description MaybeCount(MaybeSource<T> source)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description MaybeSource<T>
source()
Returns the upstream source of this Maybe.protected void
subscribeActual(SingleObserver<? super java.lang.Long> observer)
Implement this method in subclasses to handle the incomingSingleObserver
s.-
Methods inherited from class io.reactivex.rxjava3.core.Single
amb, ambArray, ambWith, blockingGet, blockingSubscribe, blockingSubscribe, blockingSubscribe, blockingSubscribe, cache, cast, compose, concat, concat, concat, concat, concat, concat, concat, concatArray, concatArrayDelayError, concatArrayEager, concatArrayEagerDelayError, concatDelayError, concatDelayError, concatDelayError, concatEager, concatEager, concatEager, concatEager, concatEagerDelayError, concatEagerDelayError, concatEagerDelayError, concatEagerDelayError, concatMap, concatMapCompletable, concatMapMaybe, concatWith, contains, contains, create, defer, delay, delay, delay, delay, delaySubscription, delaySubscription, delaySubscription, delaySubscription, delaySubscription, delaySubscription, dematerialize, doAfterSuccess, doAfterTerminate, doFinally, doOnDispose, doOnError, doOnEvent, doOnLifecycle, doOnSubscribe, doOnSuccess, doOnTerminate, error, error, filter, flatMap, flatMap, flatMap, flatMapCompletable, flatMapMaybe, flatMapObservable, flatMapPublisher, flattenAsFlowable, flattenAsObservable, flattenStreamAsFlowable, flattenStreamAsObservable, fromCallable, fromCompletionStage, fromFuture, fromFuture, fromMaybe, fromMaybe, fromObservable, fromPublisher, fromSupplier, hide, ignoreElement, just, lift, map, mapOptional, materialize, merge, merge, merge, merge, merge, merge, mergeArray, mergeArrayDelayError, mergeDelayError, mergeDelayError, mergeDelayError, mergeDelayError, mergeDelayError, mergeWith, never, observeOn, ofType, onErrorComplete, onErrorComplete, onErrorResumeNext, onErrorResumeWith, onErrorReturn, onErrorReturnItem, onTerminateDetach, repeat, repeat, repeatUntil, repeatWhen, retry, retry, retry, retry, retry, retryUntil, retryWhen, safeSubscribe, sequenceEqual, startWith, startWith, startWith, startWith, startWith, subscribe, subscribe, subscribe, subscribe, subscribe, subscribe, subscribeOn, subscribeWith, switchOnNext, switchOnNextDelayError, takeUntil, takeUntil, takeUntil, test, test, timeInterval, timeInterval, timeInterval, timeInterval, timeout, timeout, timeout, timeout, timer, timer, timestamp, timestamp, timestamp, timestamp, to, toCompletionStage, toFlowable, toFuture, toMaybe, toObservable, unsafeCreate, unsubscribeOn, using, using, wrap, zip, zip, zip, zip, zip, zip, zip, zip, zip, zipArray, zipWith
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Field Detail
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source
final MaybeSource<T> source
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Constructor Detail
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MaybeCount
public MaybeCount(MaybeSource<T> source)
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Method Detail
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source
public MaybeSource<T> source()
Description copied from interface:HasUpstreamMaybeSource
Returns the upstream source of this Maybe.Allows discovering the chain of observables.
- Specified by:
source
in interfaceHasUpstreamMaybeSource<T>
- Returns:
- the source MaybeSource
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subscribeActual
protected void subscribeActual(SingleObserver<? super java.lang.Long> observer)
Description copied from class:Single
Implement this method in subclasses to handle the incomingSingleObserver
s.There is no need to call any of the plugin hooks on the current
Single
instance or theSingleObserver
; all hooks and basic safeguards have been applied bySingle.subscribe(SingleObserver)
before this method gets called.- Specified by:
subscribeActual
in classSingle<java.lang.Long>
- Parameters:
observer
- theSingleObserver
to handle, notnull
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