/*
* 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.Iterator;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.stream.Stream;
import reactor.core.CoreSubscriber;
import reactor.core.Fuseable;
Emits the contents of a Stream source.
Type parameters: - <T> – the value type
See Also:
/**
* Emits the contents of a Stream source.
*
* @param <T> the value type
*
* @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a>
*/
final class FluxStream<T> extends Flux<T> implements Fuseable, SourceProducer<T> {
final Supplier<? extends Stream<? extends T>> streamSupplier;
FluxStream(Supplier<? extends Stream<? extends T>> streamSupplier) {
this.streamSupplier = Objects.requireNonNull(streamSupplier, "streamSupplier");
}
@Override
public void subscribe(CoreSubscriber<? super T> actual) {
Stream<? extends T> stream;
try {
stream = Objects.requireNonNull(streamSupplier.get(),
"The stream supplier returned a null Stream");
}
catch (Throwable e) {
Operators.error(actual, Operators.onOperatorError(e, actual.currentContext()));
return;
}
Iterator<? extends T> it;
try {
it = Objects.requireNonNull(stream.iterator(),
"The stream returned a null Iterator");
}
catch (Throwable e) {
Operators.error(actual, Operators.onOperatorError(e, actual.currentContext()));
return;
}
//although not required by AutoCloseable, Stream::close SHOULD be idempotent
//(at least the default AbstractPipeline implementation is)
FluxIterable.subscribe(actual, it, stream::close);
}
@Override
public Object scanUnsafe(Attr key) {
return null; //no particular key to be represented, still useful in hooks
}
}