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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 io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.internal.fuseable.FuseToObservable;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
public final class ObservableElementAtMaybe extends Maybe implements FuseToObservable {
final ObservableSource source;
final long index;
public ObservableElementAtMaybe(ObservableSource source, long index) {
this.source = source;
this.index = index;
}
@Override
public void subscribeActual(MaybeObserver super T> t) {
source.subscribe(new ElementAtObserver<>(t, index));
}
@Override
public Observable fuseToObservable() {
return RxJavaPlugins.onAssembly(new ObservableElementAt<>(source, index, null, false));
}
static final class ElementAtObserver implements Observer, Disposable {
final MaybeObserver super T> downstream;
final long index;
Disposable upstream;
long count;
boolean done;
ElementAtObserver(MaybeObserver super T> actual, long index) {
this.downstream = actual;
this.index = index;
}
@Override
public void onSubscribe(Disposable d) {
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
}
}
@Override
public void dispose() {
upstream.dispose();
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
@Override
public void onNext(T t) {
if (done) {
return;
}
long c = count;
if (c == index) {
done = true;
upstream.dispose();
downstream.onSuccess(t);
return;
}
count = c + 1;
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
return;
}
done = true;
downstream.onError(t);
}
@Override
public void onComplete() {
if (!done) {
done = true;
downstream.onComplete();
}
}
}
}
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