Class MaybeCount<T>

java.lang.Object

io.reactivex.rxjava3.core.Single<Long>

io.reactivex.rxjava3.internal.operators.maybe.MaybeCount<T>

Type Parameters:

T - the source value type

All Implemented Interfaces:

SingleSource<Long>, HasUpstreamMaybeSource<T>

public final class MaybeCount<T>
extends Single<Long>
implements HasUpstreamMaybeSource<T>

Signals 1L if the source signalled an item or 0L if the source is empty.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static final class	MaybeCount.CountMaybeObserver

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final MaybeSource<T>	source

Constructor Summary

Constructors

Constructor	Description
MaybeCount(MaybeSource<T> source)

Method Summary

Modifier and Type	Method	Description
MaybeSource<T>	source()	Returns the upstream source of this Maybe.
protected void	subscribeActual(SingleObserver<? super Long> observer)	Implement this method in subclasses to handle the incoming SingleObservers.

Methods inherited from class 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

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

source

final MaybeSource<T> source

Constructor Details

MaybeCount

public MaybeCount(MaybeSource<T> source)

Method Details

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 interface HasUpstreamMaybeSource<T>

Returns:

the source MaybeSource

subscribeActual

protected void subscribeActual(SingleObserver<? super Long> observer)

Description copied from class: Single

Implement this method in subclasses to handle the incoming SingleObservers.

There is no need to call any of the plugin hooks on the current Single instance or the SingleObserver; all hooks and basic safeguards have been applied by Single.subscribe(SingleObserver) before this method gets called.

Specified by:

subscribeActual in class Single<Long>

Parameters:

observer - the SingleObserver to handle, not null