All Downloads are FREE. Search and download functionalities are using the official Maven repository.

io.reactivex.rxjava3.internal.operators.maybe.MaybeFlatMapSingle Maven / Gradle / Ivy

Go to download

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

There is a newer version: 3.40.2
Show newest version
/*
 * 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.maybe;

import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;

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;

/**
 * Maps the success value of the source MaybeSource into a Single.
 * 

History: 2.0.2 - experimental * @param the input value type * @param the result value type * @since 2.1 */ public final class MaybeFlatMapSingle extends Maybe { final MaybeSource source; final Function> mapper; public MaybeFlatMapSingle(MaybeSource source, Function> mapper) { this.source = source; this.mapper = mapper; } @Override protected void subscribeActual(MaybeObserver downstream) { source.subscribe(new FlatMapMaybeObserver<>(downstream, mapper)); } static final class FlatMapMaybeObserver extends AtomicReference implements MaybeObserver, Disposable { private static final long serialVersionUID = 4827726964688405508L; final MaybeObserver downstream; final Function> mapper; FlatMapMaybeObserver(MaybeObserver actual, Function> mapper) { this.downstream = actual; this.mapper = mapper; } @Override public void dispose() { DisposableHelper.dispose(this); } @Override public boolean isDisposed() { return DisposableHelper.isDisposed(get()); } @Override public void onSubscribe(Disposable d) { if (DisposableHelper.setOnce(this, d)) { downstream.onSubscribe(this); } } @Override public void onSuccess(T value) { SingleSource ss; try { ss = Objects.requireNonNull(mapper.apply(value), "The mapper returned a null SingleSource"); } catch (Throwable ex) { Exceptions.throwIfFatal(ex); onError(ex); return; } if (!isDisposed()) { ss.subscribe(new FlatMapSingleObserver(this, downstream)); } } @Override public void onError(Throwable e) { downstream.onError(e); } @Override public void onComplete() { downstream.onComplete(); } } static final class FlatMapSingleObserver implements SingleObserver { final AtomicReference parent; final MaybeObserver downstream; FlatMapSingleObserver(AtomicReference parent, MaybeObserver downstream) { this.parent = parent; this.downstream = downstream; } @Override public void onSubscribe(final Disposable d) { DisposableHelper.replace(parent, d); } @Override public void onSuccess(final R value) { downstream.onSuccess(value); } @Override public void onError(final Throwable e) { downstream.onError(e); } } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy