/*
* 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.function.
Function;
import org.reactivestreams.
Publisher;
import reactor.core.
CoreSubscriber;
/**
* A {@link Flux} that emits the item from a {@link Mono} and recursively expand it into
* inner sequences that are also replayed. The type of recursion is driven by the
* {@code breadthFirst} parameter.
*
* @author David Karnok
* @author Simon Baslé
*/
final class
MonoExpand<T> extends
FluxFromMonoOperator<T, T> {
final boolean
breadthFirst;
final
Function<? super T, ? extends
Publisher<? extends T>>
expander;
final int
capacityHint;
MonoExpand(
Mono<T>
source,
Function<? super T, ? extends
Publisher<? extends T>>
expander,
boolean
breadthFirst, int
capacityHint) {
super(
source);
this.
expander =
expander;
this.
breadthFirst =
breadthFirst;
this.
capacityHint =
capacityHint;
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
s) {
if (
breadthFirst) {
FluxExpand.
ExpandBreathSubscriber<T>
parent =
new
FluxExpand.
ExpandBreathSubscriber<>(
s,
expander,
capacityHint);
parent.
queue.
offer(
source);
s.
onSubscribe(
parent);
parent.
drainQueue();
}
else {
FluxExpand.
ExpandDepthSubscription<T>
parent =
new
FluxExpand.
ExpandDepthSubscription<>(
s,
expander,
capacityHint);
parent.
source =
source;
s.
onSubscribe(
parent);
}
}
}