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io.reactivex.rxjava3.internal.jdk8

public final Class ObservableMapOptional<T, R>

extends Observable<R>
Class Inheritance
Type Parameters
<T>
the upstream element type
<R>
the output element type
Imports
java.util.*, io.reactivex.rxjava3.core.Observable, .Observer, io.reactivex.rxjava3.functions.Function, io.reactivex.rxjava3.internal.observers.BasicFuseableObserver
Map the upstream values into an Optional and emit its value if any.
Since
3.0.0

Nested and Inner Type Summary

Modifier and TypeClass and Description
pack-priv static class
ObservableMapOptional.MapOptionalObserver<T, R>

Field Summary

Modifier and TypeField and Description
pack-priv final Function<? super T, Optional<? extends R>>
mapper

pack-priv final Observable<T>
source

Constructor Summary

AccessConstructor and Description
public
ObservableMapOptional(Observable<T> source, Function<? super T, Optional<? extends R>> mapper)

Method Summary

Modifier and TypeMethod and Description
protected void
subscribeActual(Observer<? super R> observer)

Inherited from io.reactivex.rxjava3.core.Observable:
allambambArrayambWithanyblockingFirstblockingFirstblockingForEachblockingForEachblockingIterableblockingIterableblockingLastblockingLastblockingLatestblockingMostRecentblockingNextblockingSingleblockingSingleblockingStreamblockingStreamblockingSubscribeblockingSubscribeblockingSubscribeblockingSubscribeblockingSubscribebufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferbufferSizecachecacheWithInitialCapacitycastcollectcollectcollectIntocombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestcombineLatestArraycombineLatestArraycombineLatestArrayDelayErrorcombineLatestArrayDelayErrorcombineLatestDelayErrorcombineLatestDelayErrorcomposeconcatconcatconcatconcatconcatconcatconcatArrayconcatArrayDelayErrorconcatArrayEagerconcatArrayEagerconcatArrayEagerDelayErrorconcatArrayEagerDelayErrorconcatDelayErrorconcatDelayErrorconcatDelayErrorconcatEagerconcatEagerconcatEagerconcatEagerconcatEagerDelayErrorconcatEagerDelayErrorconcatEagerDelayErrorconcatEagerDelayErrorconcatMapconcatMapconcatMapconcatMapCompletableconcatMapCompletableconcatMapCompletableDelayErrorconcatMapCompletableDelayErrorconcatMapCompletableDelayErrorconcatMapDelayErrorconcatMapDelayErrorconcatMapDelayErrorconcatMapEagerconcatMapEagerconcatMapEagerDelayErrorconcatMapEagerDelayErrorconcatMapIterableconcatMapMaybeconcatMapMaybeconcatMapMaybeDelayErrorconcatMapMaybeDelayErrorconcatMapMaybeDelayErrorconcatMapSingleconcatMapSingleconcatMapSingleDelayErrorconcatMapSingleDelayErrorconcatMapSingleDelayErrorconcatMapStreamconcatWithconcatWithconcatWithconcatWithcontainscountcreatedebouncedebouncedebouncedebouncedefaultIfEmptydeferdelaydelaydelaydelaydelaydelaydelaySubscriptiondelaySubscriptiondelaySubscriptiondematerializedistinctdistinctdistinctdistinctUntilChangeddistinctUntilChangeddistinctUntilChangeddoAfterNextdoAfterTerminatedoFinallydoOnCompletedoOnDisposedoOnEachdoOnEachdoOnErrordoOnLifecycledoOnNextdoOnSubscribedoOnTerminateelementAtelementAtelementAtOrErroremptyerrorerrorfilterfirstfirstElementfirstOrErrorfirstOrErrorStagefirstStageflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapflatMapCompletableflatMapCompletableflatMapIterableflatMapIterableflatMapMaybeflatMapMaybeflatMapSingleflatMapSingleflatMapStreamforEachforEachWhileforEachWhileforEachWhilefromActionfromArrayfromCallablefromCompletablefromCompletionStagefromFuturefromFuturefromIterablefromMaybefromOptionalfromPublisherfromRunnablefromSinglefromStreamfromSuppliergenerategenerategenerategenerategenerategroupBygroupBygroupBygroupBygroupBygroupJoinhideignoreElementsintervalintervalintervalintervalintervalRangeintervalRangeisEmptyjoinjustjustjustjustjustjustjustjustjustjustlastlastElementlastOrErrorlastOrErrorStagelastStageliftmapmapOptionalmaterializemergemergemergemergemergemergemergemergemergeArraymergeArraymergeArrayDelayErrormergeArrayDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeDelayErrormergeWithmergeWithmergeWithmergeWithneverobserveOnobserveOnobserveOnofTypeonErrorCompleteonErrorCompleteonErrorResumeNextonErrorResumeWithonErrorReturnonErrorReturnItemonTerminateDetachpublishpublishrangerangeLongreducereducereduceWithrepeatrepeatrepeatUntilrepeatWhenreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayreplayretryretryretryretryretryretryUntilretryWhensafeSubscribesamplesamplesamplesamplesamplesamplesamplescanscanscanWithsequenceEqualsequenceEqualsequenceEqualsequenceEqualserializesharesinglesingleElementsingleOrErrorsingleOrErrorStagesingleStageskipskipskipskipLastskipLastskipLastskipLastskipLastskipLastskipUntilskipWhilesortedsortedstartWithstartWithstartWithstartWithstartWithArraystartWithItemstartWithIterablesubscribesubscribesubscribesubscribesubscribesubscribesubscribeActualsubscribeOnsubscribeWithswitchIfEmptyswitchMapswitchMapswitchMapCompletableswitchMapCompletableDelayErrorswitchMapDelayErrorswitchMapDelayErrorswitchMapMaybeswitchMapMaybeDelayErrorswitchMapSingleswitchMapSingleDelayErrorswitchOnNextswitchOnNextswitchOnNextDelayErrorswitchOnNextDelayErrortaketaketaketakeLasttakeLasttakeLasttakeLasttakeLasttakeLasttakeLasttakeLasttakeLasttakeUntiltakeUntiltakeWhiletesttestthrottleFirstthrottleFirstthrottleFirstthrottleLastthrottleLastthrottleLastthrottleLatestthrottleLatestthrottleLatestthrottleLatestthrottleLatestthrottleWithTimeoutthrottleWithTimeoutthrottleWithTimeouttimeIntervaltimeIntervaltimeIntervaltimeIntervaltimeouttimeouttimeouttimeouttimeouttimeouttimeouttimeouttimertimertimestamptimestamptimestamptimestamptotoFlowabletoFuturetoListtoListtoListtoMaptoMaptoMaptoMultimaptoMultimaptoMultimaptoMultimaptoSortedListtoSortedListtoSortedListtoSortedListunsafeCreateunsubscribeOnusingusingwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwindowwithLatestFromwithLatestFromwithLatestFromwithLatestFromwithLatestFromwithLatestFromwrapzipzipzipzipzipzipzipzipzipzipzipzipzipArrayzipWithzipWithzipWithzipWith

Field Detail

mapperback to summary
pack-priv final Function<? super T, Optional<? extends R>> mapper
sourceback to summary
pack-priv final Observable<T> source

Constructor Detail

ObservableMapOptionalback to summary
public ObservableMapOptional(Observable<T> source, Function<? super T, Optional<? extends R>> mapper)

Method Detail

subscribeActualback to summary
protected void subscribeActual(Observer<? super R> observer)
Annotations
@Override
io.reactivex.rxjava3.internal.jdk8 back to summary

pack-priv final Class ObservableMapOptional.MapOptionalObserver<T, R>

extends BasicFuseableObserver<T, R>
Class Inheritance

Field Summary

Modifier and TypeField and Description
pack-priv final Function<? super T, Optional<? extends R>>
mapper

Inherited from io.reactivex.rxjava3.internal.observers.BasicFuseableObserver:
donedownstreamqdsourceModeupstream

Constructor Summary

AccessConstructor and Description
pack-priv
MapOptionalObserver(Observer<? super R> downstream, Function<? super T, Optional<? extends R>> mapper)

Method Summary

Modifier and TypeMethod and Description
public void
onNext(T
the item emitted by the Observable
t)

Implements io.reactivex.rxjava3.core.Observer.onNext.

Provides the Observer with a new item to observe.
public R
poll()

Implements io.reactivex.rxjava3.operators.SimpleQueue.poll.

Tries to dequeue a value (non-null) or returns null if the queue is empty.
public int
requestFusion(int
the requested fusion mode, allowed values are SYNC, ASYNC, ANY combined with BOUNDARY (e.g., requestFusion(SYNC | BOUNDARY)).
mode)

Implements io.reactivex.rxjava3.operators.QueueFuseable.requestFusion.

Request a fusion mode from the upstream.
Inherited from io.reactivex.rxjava3.internal.observers.BasicFuseableObserver:
afterDownstreambeforeDownstreamcleardisposefailisDisposedisEmptyofferofferonCompleteonErroronSubscribetransitiveBoundaryFusion

Field Detail

mapperback to summary
pack-priv final Function<? super T, Optional<? extends R>> mapper

Constructor Detail

MapOptionalObserverback to summary
pack-priv MapOptionalObserver(Observer<? super R> downstream, Function<? super T, Optional<? extends R>> mapper)

Method Detail

onNextback to summary
public void onNext(T t)

Implements io.reactivex.rxjava3.core.Observer.onNext.

Doc from io.reactivex.rxjava3.core.Observer.onNext.

Provides the Observer with a new item to observe.

The Observable may call this method 0 or more times.

The Observable will not call this method again after it calls either onComplete or onError.

Parameters
t:T

the item emitted by the Observable

Annotations
@Override
pollback to summary
public R poll() throws Throwable

Implements io.reactivex.rxjava3.operators.SimpleQueue.poll.

Doc from io.reactivex.rxjava3.operators.SimpleQueue.poll.

Tries to dequeue a value (non-null) or returns null if the queue is empty.

If the producer uses offer(Object, Object) and when polling in pairs, if the first poll() returns a non-null item, the second poll() is guaranteed to return a non-null item as well.

Returns:R

the item or null to indicate an empty queue

Annotations
@Override
Exceptions
Throwable:
if some pre-processing of the dequeued item (usually through fused functions) throws.
requestFusionback to summary
public int requestFusion(int mode)

Implements io.reactivex.rxjava3.operators.QueueFuseable.requestFusion.

Doc from io.reactivex.rxjava3.operators.QueueFuseable.requestFusion.

Request a fusion mode from the upstream.

This should be called before onSubscribe returns.

Calling this method multiple times or after onSubscribe finished is not allowed and may result in undefined behavior.

Parameters
mode:int

the requested fusion mode, allowed values are SYNC, ASYNC, ANY combined with BOUNDARY (e.g., requestFusion(SYNC | BOUNDARY)).

Returns:int

the established fusion mode: NONE, SYNC, ASYNC.

Annotations
@Override