/*
* 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 reactor.core.
CoreSubscriber;
/**
* Emits a default value if the wrapped Mono is empty.
* @param <T> the value type
*/
final class
MonoDefaultIfEmpty<T> extends
MonoOperator<T, T> {
final T
defaultValue;
MonoDefaultIfEmpty(
Mono<? extends T>
source, T
defaultValue) {
super(
source);
this.
defaultValue =
Objects.
requireNonNull(
defaultValue, "defaultValue");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
source.
subscribe(new
FluxDefaultIfEmpty.
DefaultIfEmptySubscriber<>(
actual,
defaultValue));
}
}