Top Description Inners Fields Constructors Methods
reactor.core.publisher

pack-priv final Class MonoElementAt<T>

extends MonoFromFluxOperator<T, T>
implements Fuseable
Class Inheritance
All Implemented Interfaces
reactor.core.Fuseable
Type Parameters
<T>
the value type
Imports
java.util.Objects, reactor.core.CoreSubscriber, .Fuseable, reactor.util.annotation.Nullable
Emits only the element at the given index position or signals a default value if specified or IndexOutOfBoundsException if the sequence is shorter.
See Also
Reactive-Streams-Commons

Nested and Inner Type Summary

Modifier and TypeClass and Description
pack-priv static class
MonoElementAt.ElementAtSubscriber<T>

Field Summary

Modifier and TypeField and Description
pack-priv final T
defaultValue

pack-priv final long
index

Inherited from reactor.core.publisher.MonoFromFluxOperator:
optimizableOperatorsource

Constructor Summary

AccessConstructor and Description
pack-priv
MonoElementAt(Flux<? extends T> source, long index)

pack-priv
MonoElementAt(Flux<? extends T> source, long index, T defaultValue)

Method Summary

Modifier and TypeMethod and Description
public Object
scanUnsafe(Scannable.Attr<T>
a Attr to resolve for the component.
key)

Overrides reactor.core.publisher.MonoFromFluxOperator.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place.
public CoreSubscriber<? super T>
subscribeOrReturn(CoreSubscriber<? super T> actual)

Implements abstract reactor.core.publisher.MonoFromFluxOperator.subscribeOrReturn.

Implements reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Allow delegation of the subscription by returning a CoreSubscriber, or force subscription encapsulation by returning null.
Inherited from reactor.core.publisher.MonoFromFluxOperator:
nextOptimizableSourcesourcesubscribe

Field Detail

defaultValueback to summary
pack-priv final T defaultValue
indexback to summary
pack-priv final long index

Constructor Detail

MonoElementAtback to summary
pack-priv MonoElementAt(Flux<? extends T> source, long index)
MonoElementAtback to summary
pack-priv MonoElementAt(Flux<? extends T> source, long index, T defaultValue)

Method Detail

scanUnsafeback to summary
public Object scanUnsafe(Scannable.Attr<T> key)

Overrides reactor.core.publisher.MonoFromFluxOperator.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

Doc from reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place. Although it is ignoring the generic type of the Attr key, implementors should take care to return values of the correct type, and return null if no specific value is available.

For public consumption of attributes, prefer using scan(Attr), which will return a typed value and fall back to the key's default if the component didn't define any mapping.

Parameters
key:Scannable.Attr<T>

a Attr to resolve for the component.

Returns:Object

the value associated to the key for that specific component, or null if none.

Annotations
@Override
subscribeOrReturnback to summary
public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual)

Implements abstract reactor.core.publisher.MonoFromFluxOperator.subscribeOrReturn.

Implements reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Doc from reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Allow delegation of the subscription by returning a CoreSubscriber, or force subscription encapsulation by returning null. This can be used in conjunction with nextOptimizableSource() to perform subscription in a loop instead of by recursion.

Returns:CoreSubscriber<? super T>

next CoreSubscriber or "null" if the subscription was already done inside the method

Annotations
@Override
reactor.core.publisher back to summary

pack-priv final Class MonoElementAt.ElementAtSubscriber<T>

extends Operators.BaseFluxToMonoOperator<T, T>
Class Inheritance

Field Summary

Modifier and TypeField and Description
pack-priv final T
defaultValue

pack-priv boolean
done

pack-priv long
index

pack-priv final long
target

Inherited from reactor.core.publisher.Operators.BaseFluxToMonoOperator:
actualhasRequestsstateSTATE

Constructor Summary

AccessConstructor and Description
pack-priv
ElementAtSubscriber(CoreSubscriber<? super T> actual, long index, T defaultValue)

Method Summary

Modifier and TypeMethod and Description
pack-priv T
accumulatedValue()

Implements abstract reactor.core.publisher.Operators.BaseFluxToMonoOperator.accumulatedValue.

This method is being called either during onComplete invocation in case request has happened before, or during request invocation in case onComplete with no values has happened before.
public void
onComplete()

Implements org.reactivestreams.Subscriber.onComplete.

Successful terminal state.
public void
onError(Throwable
the throwable signaled
t)

Implements org.reactivestreams.Subscriber.onError.

Failed terminal state.
public void
onNext(T
the element signaled
t)

Implements org.reactivestreams.Subscriber.onNext.

Data notification sent by the Publisher in response to requests to Subscription#request(long).
public Object
scanUnsafe(Scannable.Attr<T>
a Attr to resolve for the component.
key)

Overrides reactor.core.publisher.Operators.BaseFluxToMonoOperator.scanUnsafe.

Overrides default reactor.core.publisher.InnerProducer.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place.
Inherited from reactor.core.publisher.Operators.BaseFluxToMonoOperator:
actualcancelclearcompletePossiblyEmptyisEmptyonSubscribepollrequestrequestFusionsize

Field Detail

defaultValueback to summary
pack-priv final T defaultValue
Annotations
@Nullable
doneback to summary
pack-priv boolean done
indexback to summary
pack-priv long index
targetback to summary
pack-priv final long target

Constructor Detail

ElementAtSubscriberback to summary
pack-priv ElementAtSubscriber(CoreSubscriber<? super T> actual, long index, T defaultValue)

Method Detail

accumulatedValueback to summary
pack-priv T accumulatedValue()

Implements abstract reactor.core.publisher.Operators.BaseFluxToMonoOperator.accumulatedValue.

Doc from reactor.core.publisher.Operators.BaseFluxToMonoOperator.accumulatedValue.

This method is being called either during onComplete invocation in case request has happened before, or during request invocation in case onComplete with no values has happened before.

Note

, this method expectedly returns null if cancellation happened before

Returns:T

accumulated/default value or null if cancelled before

Annotations
@Override
onCompleteback to summary
public void onComplete()

Implements org.reactivestreams.Subscriber.onComplete.

Doc from org.reactivestreams.Subscriber.onComplete.

Successful terminal state.

No further events will be sent even if Subscription#request(long) is invoked again.

Annotations
@Override
onErrorback to summary
public void onError(Throwable t)

Implements org.reactivestreams.Subscriber.onError.

Doc from org.reactivestreams.Subscriber.onError.

Failed terminal state.

No further events will be sent even if Subscription#request(long) is invoked again.

Parameters
t:Throwable

the throwable signaled

Annotations
@Override
onNextback to summary
public void onNext(T t)

Implements org.reactivestreams.Subscriber.onNext.

Doc from org.reactivestreams.Subscriber.onNext.

Data notification sent by the Publisher in response to requests to Subscription#request(long).

Parameters
t:T

the element signaled

Annotations
@Override
scanUnsafeback to summary
public Object scanUnsafe(Scannable.Attr<T> key)

Overrides reactor.core.publisher.Operators.BaseFluxToMonoOperator.scanUnsafe.

Overrides default reactor.core.publisher.InnerProducer.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

Doc from reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place. Although it is ignoring the generic type of the Attr key, implementors should take care to return values of the correct type, and return null if no specific value is available.

For public consumption of attributes, prefer using scan(Attr), which will return a typed value and fall back to the key's default if the component didn't define any mapping.

Parameters
key:Scannable.Attr<T>

a Attr to resolve for the component.

Returns:Object

the value associated to the key for that specific component, or null if none.

Annotations
@Override
@Nullable