Class MaybeFlatMapIterableObservable.FlatMapIterableObserver<T,R>
- java.lang.Object
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- io.reactivex.rxjava3.internal.observers.BasicQueueDisposable<R>
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- io.reactivex.rxjava3.internal.operators.maybe.MaybeFlatMapIterableObservable.FlatMapIterableObserver<T,R>
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- All Implemented Interfaces:
MaybeObserver<T>
,Disposable
,QueueDisposable<R>
,QueueFuseable<R>
,SimpleQueue<R>
- Enclosing class:
- MaybeFlatMapIterableObservable<T,R>
static final class MaybeFlatMapIterableObservable.FlatMapIterableObserver<T,R> extends BasicQueueDisposable<R> implements MaybeObserver<T>
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Field Summary
Fields Modifier and Type Field Description (package private) boolean
cancelled
(package private) Observer<? super R>
downstream
(package private) java.util.Iterator<? extends R>
it
(package private) Function<? super T,? extends java.lang.Iterable<? extends R>>
mapper
(package private) boolean
outputFused
(package private) Disposable
upstream
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all enqueued items from this queue.void
dispose()
Dispose the resource, the operation should be idempotent.boolean
isDisposed()
Returns true if this resource has been disposed.boolean
isEmpty()
Returns true if the queue is empty.void
onComplete()
Called once the deferred computation completes normally.void
onError(java.lang.Throwable e)
Notifies theMaybeObserver
that theMaybe
has experienced an error condition.void
onSubscribe(Disposable d)
Provides theMaybeObserver
with the means of cancelling (disposing) the connection (channel) with theMaybe
in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.void
onSuccess(T value)
Notifies theMaybeObserver
with one item and that theMaybe
has finished sending push-based notifications.R
poll()
Tries to dequeue a value (non-null) or returns null if the queue is empty.int
requestFusion(int mode)
Request a fusion mode from the upstream.-
Methods inherited from class io.reactivex.rxjava3.internal.observers.BasicQueueDisposable
offer, offer
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Method Detail
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onSubscribe
public void onSubscribe(Disposable d)
Description copied from interface:MaybeObserver
Provides theMaybeObserver
with the means of cancelling (disposing) the connection (channel) with theMaybe
in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.- Specified by:
onSubscribe
in interfaceMaybeObserver<T>
- Parameters:
d
- theDisposable
instance whoseDisposable.dispose()
can be called anytime to cancel the connection
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onSuccess
public void onSuccess(T value)
Description copied from interface:MaybeObserver
Notifies theMaybeObserver
with one item and that theMaybe
has finished sending push-based notifications.The
Maybe
will not call this method if it callsMaybeObserver.onError(java.lang.Throwable)
.- Specified by:
onSuccess
in interfaceMaybeObserver<T>
- Parameters:
value
- the item emitted by theMaybe
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onError
public void onError(java.lang.Throwable e)
Description copied from interface:MaybeObserver
Notifies theMaybeObserver
that theMaybe
has experienced an error condition.If the
Maybe
calls this method, it will not thereafter callMaybeObserver.onSuccess(T)
.- Specified by:
onError
in interfaceMaybeObserver<T>
- Parameters:
e
- the exception encountered by theMaybe
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onComplete
public void onComplete()
Description copied from interface:MaybeObserver
Called once the deferred computation completes normally.- Specified by:
onComplete
in interfaceMaybeObserver<T>
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dispose
public void dispose()
Description copied from interface:Disposable
Dispose the resource, the operation should be idempotent.- Specified by:
dispose
in interfaceDisposable
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isDisposed
public boolean isDisposed()
Description copied from interface:Disposable
Returns true if this resource has been disposed.- Specified by:
isDisposed
in interfaceDisposable
- Returns:
- true if this resource has been disposed
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requestFusion
public int requestFusion(int mode)
Description copied from interface:QueueFuseable
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.- Specified by:
requestFusion
in interfaceQueueFuseable<T>
- Parameters:
mode
- the requested fusion mode, allowed values areQueueFuseable.SYNC
,QueueFuseable.ASYNC
,QueueFuseable.ANY
combined withQueueFuseable.BOUNDARY
(e.g.,requestFusion(SYNC | BOUNDARY)
).- Returns:
- the established fusion mode:
QueueFuseable.NONE
,QueueFuseable.SYNC
,QueueFuseable.ASYNC
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clear
public void clear()
Description copied from interface:SimpleQueue
Removes all enqueued items from this queue.- Specified by:
clear
in interfaceSimpleQueue<T>
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isEmpty
public boolean isEmpty()
Description copied from interface:SimpleQueue
Returns true if the queue is empty.Note however that due to potential fused functions in
SimpleQueue.poll()
it is possible this method returns false but then poll() returns null because the fused function swallowed the available item(s).- Specified by:
isEmpty
in interfaceSimpleQueue<T>
- Returns:
- true if the queue is empty
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poll
@Nullable public R poll()
Description copied from interface:SimpleQueue
Tries to dequeue a value (non-null) or returns null if the queue is empty.If the producer uses
SimpleQueue.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.- Specified by:
poll
in interfaceSimpleQueue<T>
- Returns:
- the item or null to indicate an empty queue
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