io.reactivex.rxjava3.internal.operators.observable.ObservableElementAt Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of redisson-all Show documentation
Show all versions of redisson-all Show documentation
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.NoSuchElementException;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
public final class ObservableElementAt extends AbstractObservableWithUpstream {
final long index;
final T defaultValue;
final boolean errorOnFewer;
public ObservableElementAt(ObservableSource source, long index, T defaultValue, boolean errorOnFewer) {
super(source);
this.index = index;
this.defaultValue = defaultValue;
this.errorOnFewer = errorOnFewer;
}
@Override
public void subscribeActual(Observer super T> t) {
source.subscribe(new ElementAtObserver<>(t, index, defaultValue, errorOnFewer));
}
static final class ElementAtObserver implements Observer, Disposable {
final Observer super T> downstream;
final long index;
final T defaultValue;
final boolean errorOnFewer;
Disposable upstream;
long count;
boolean done;
ElementAtObserver(Observer super T> actual, long index, T defaultValue, boolean errorOnFewer) {
this.downstream = actual;
this.index = index;
this.defaultValue = defaultValue;
this.errorOnFewer = errorOnFewer;
}
@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.onNext(t);
downstream.onComplete();
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;
T v = defaultValue;
if (v == null && errorOnFewer) {
downstream.onError(new NoSuchElementException());
} else {
if (v != null) {
downstream.onNext(v);
}
downstream.onComplete();
}
}
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy