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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex.rxjava3.internal.operators.observable;
import java.util.Iterator;
import java.util.Objects;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.exceptions.Exceptions;
import io.reactivex.rxjava3.functions.Function;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
/**
* Maps a sequence into an Iterable and emits its values.
*
* @param the input value type to map to Iterable
* @param the element type of the Iterable and the output
*/
public final class ObservableFlattenIterable extends AbstractObservableWithUpstream {
final Function super T, ? extends Iterable extends R>> mapper;
public ObservableFlattenIterable(ObservableSource source,
Function super T, ? extends Iterable extends R>> mapper) {
super(source);
this.mapper = mapper;
}
@Override
protected void subscribeActual(Observer super R> observer) {
source.subscribe(new FlattenIterableObserver<>(observer, mapper));
}
static final class FlattenIterableObserver implements Observer, Disposable {
final Observer super R> downstream;
final Function super T, ? extends Iterable extends R>> mapper;
Disposable upstream;
FlattenIterableObserver(Observer super R> actual, Function super T, ? extends Iterable extends R>> mapper) {
this.downstream = actual;
this.mapper = mapper;
}
@Override
public void onSubscribe(Disposable d) {
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
}
}
@Override
public void onNext(T value) {
if (upstream == DisposableHelper.DISPOSED) {
return;
}
Iterator extends R> it;
try {
it = mapper.apply(value).iterator();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
upstream.dispose();
onError(ex);
return;
}
Observer super R> a = downstream;
for (;;) {
boolean b;
try {
b = it.hasNext();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
upstream.dispose();
onError(ex);
return;
}
if (b) {
R v;
try {
v = Objects.requireNonNull(it.next(), "The iterator returned a null value");
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
upstream.dispose();
onError(ex);
return;
}
a.onNext(v);
} else {
break;
}
}
}
@Override
public void onError(Throwable e) {
if (upstream == DisposableHelper.DISPOSED) {
RxJavaPlugins.onError(e);
return;
}
upstream = DisposableHelper.DISPOSED;
downstream.onError(e);
}
@Override
public void onComplete() {
if (upstream == DisposableHelper.DISPOSED) {
return;
}
upstream = DisposableHelper.DISPOSED;
downstream.onComplete();
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
@Override
public void dispose() {
upstream.dispose();
upstream = DisposableHelper.DISPOSED;
}
}
}
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