Top Description Fields Constructors Methods
reactor.core.publisher

pack-priv final Class MonoDefaultIfEmpty<T>

extends InternalMonoOperator<T, T>
Class Inheritance
Type Parameters
<T>
the value type
Imports
java.util.Objects, reactor.core.CoreSubscriber
Emits a default value if the wrapped Mono is empty.

Field Summary

Modifier and TypeField and Description
pack-priv final T
defaultValue

Inherited from reactor.core.publisher.InternalMonoOperator:
optimizableOperator

Constructor Summary

AccessConstructor and Description
pack-priv
MonoDefaultIfEmpty(Mono<? extends T> source, 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.InternalMonoOperator.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.InternalMonoOperator.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.InternalMonoOperator:
nextOptimizableSourcesourcesubscribe

Field Detail

defaultValueback to summary
pack-priv final T defaultValue

Constructor Detail

MonoDefaultIfEmptyback to summary
pack-priv MonoDefaultIfEmpty(Mono<? extends T> source, T defaultValue)

Method Detail

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

Overrides reactor.core.publisher.InternalMonoOperator.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.InternalMonoOperator.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