/*
* Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package reactor.core.publisher;
import java.util.
Objects;
import org.reactivestreams.
Publisher;
import reactor.core.
Scannable;
import reactor.util.annotation.
Nullable;
/**
* A decorating {@link Flux} {@link Publisher} that exposes {@link Flux} API over an
* arbitrary {@link Publisher} Useful to create operators which return a {@link Flux}.
*
* @param <I> delegate {@link Publisher} type
* @param <O> produced type
*/
abstract class
FluxFromMonoOperator<I, O> extends
Flux<O> implements
Scannable {
protected final
Mono<? extends I>
source;
/**
* Build a {@link FluxFromMonoOperator} wrapper around the passed parent {@link Publisher}
*
* @param source the {@link Publisher} to decorate
*/
protected
FluxFromMonoOperator(
Mono<? extends I>
source) {
this.
source =
Objects.
requireNonNull(
source);
}
@
Override
@
Nullable
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
PREFETCH) return
getPrefetch();
if (
key ==
Attr.
PARENT) return
source;
return null;
}
}