/**
* 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.internal.operators.flowable;
import java.util.List;
import java.util.concurrent.*;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.flowables.ConnectableFlowable;
import io.reactivex.functions.*;
import io.reactivex.internal.functions.Functions;
/**
* Helper utility class to support Flowable with inner classes.
*/
public final class FlowableInternalHelper {
/** Utility class. */
private FlowableInternalHelper() {
throw new IllegalStateException("No instances!");
}
static final class SimpleGenerator<T, S> implements BiFunction<S, Emitter<T>, S> {
final Consumer<Emitter<T>> consumer;
SimpleGenerator(Consumer<Emitter<T>> consumer) {
this.consumer = consumer;
}
@Override
public S apply(S t1, Emitter<T> t2) throws Exception {
consumer.accept(t2);
return t1;
}
}
public static <T, S> BiFunction<S, Emitter<T>, S> simpleGenerator(Consumer<Emitter<T>> consumer) {
return new SimpleGenerator<T, S>(consumer);
}
static final class SimpleBiGenerator<T, S> implements BiFunction<S, Emitter<T>, S> {
final BiConsumer<S, Emitter<T>> consumer;
SimpleBiGenerator(BiConsumer<S, Emitter<T>> consumer) {
this.consumer = consumer;
}
@Override
public S apply(S t1, Emitter<T> t2) throws Exception {
consumer.accept(t1, t2);
return t1;
}
}
public static <T, S> BiFunction<S, Emitter<T>, S> simpleBiGenerator(BiConsumer<S, Emitter<T>> consumer) {
return new SimpleBiGenerator<T, S>(consumer);
}
static final class ItemDelayFunction<T, U> implements Function<T, Publisher<T>> {
final Function<? super T, ? extends Publisher<U>> itemDelay;
ItemDelayFunction(Function<? super T, ? extends Publisher<U>> itemDelay) {
this.itemDelay = itemDelay;
}
@Override
public Publisher<T> apply(final T v) throws Exception {
return new FlowableTakePublisher<U>(itemDelay.apply(v), 1).map(Functions.justFunction(v)).defaultIfEmpty(v);
}
}
public static <T, U> Function<T, Publisher<T>> itemDelay(final Function<? super T, ? extends Publisher<U>> itemDelay) {
return new ItemDelayFunction<T, U>(itemDelay);
}
static final class SubscriberOnNext<T> implements Consumer<T> {
final Subscriber<T> subscriber;
SubscriberOnNext(Subscriber<T> subscriber) {
this.subscriber = subscriber;
}
@Override
public void accept(T v) throws Exception {
subscriber.onNext(v);
}
}
static final class SubscriberOnError<T> implements Consumer<Throwable> {
final Subscriber<T> subscriber;
SubscriberOnError(Subscriber<T> subscriber) {
this.subscriber = subscriber;
}
@Override
public void accept(Throwable v) throws Exception {
subscriber.onError(v);
}
}
static final class SubscriberOnComplete<T> implements Action {
final Subscriber<T> subscriber;
SubscriberOnComplete(Subscriber<T> subscriber) {
this.subscriber = subscriber;
}
@Override
public void run() throws Exception {
subscriber.onComplete();
}
}
public static <T> Consumer<T> subscriberOnNext(Subscriber<T> subscriber) {
return new SubscriberOnNext<T>(subscriber);
}
public static <T> Consumer<Throwable> subscriberOnError(Subscriber<T> subscriber) {
return new SubscriberOnError<T>(subscriber);
}
public static <T> Action subscriberOnComplete(Subscriber<T> subscriber) {
return new SubscriberOnComplete<T>(subscriber);
}
static final class FlatMapWithCombinerInner<U, R, T> implements Function<U, R> {
private final BiFunction<? super T, ? super U, ? extends R> combiner;
private final T t;
FlatMapWithCombinerInner(BiFunction<? super T, ? super U, ? extends R> combiner, T t) {
this.combiner = combiner;
this.t = t;
}
@Override
public R apply(U w) throws Exception {
return combiner.apply(t, w);
}
}
static final class FlatMapWithCombinerOuter<T, R, U> implements Function<T, Publisher<R>> {
private final BiFunction<? super T, ? super U, ? extends R> combiner;
private final Function<? super T, ? extends Publisher<? extends U>> mapper;
FlatMapWithCombinerOuter(BiFunction<? super T, ? super U, ? extends R> combiner,
Function<? super T, ? extends Publisher<? extends U>> mapper) {
this.combiner = combiner;
this.mapper = mapper;
}
@Override
public Publisher<R> apply(final T t) throws Exception {
@SuppressWarnings("unchecked")
Publisher<U> u = (Publisher<U>)mapper.apply(t);
return new FlowableMapPublisher<U, R>(u, new FlatMapWithCombinerInner<U, R, T>(combiner, t));
}
}
public static <T, U, R> Function<T, Publisher<R>> flatMapWithCombiner(
final Function<? super T, ? extends Publisher<? extends U>> mapper,
final BiFunction<? super T, ? super U, ? extends R> combiner) {
return new FlatMapWithCombinerOuter<T, R, U>(combiner, mapper);
}
static final class FlatMapIntoIterable<T, U> implements Function<T, Publisher<U>> {
private final Function<? super T, ? extends Iterable<? extends U>> mapper;
FlatMapIntoIterable(Function<? super T, ? extends Iterable<? extends U>> mapper) {
this.mapper = mapper;
}
@Override
public Publisher<U> apply(T t) throws Exception {
return new FlowableFromIterable<U>(mapper.apply(t));
}
}
public static <T, U> Function<T, Publisher<U>> flatMapIntoIterable(final Function<? super T, ? extends Iterable<? extends U>> mapper) {
return new FlatMapIntoIterable<T, U>(mapper);
}
public static <T> Callable<ConnectableFlowable<T>> replayCallable(final Flowable<T> parent) {
return new ReplayCallable<T>(parent);
}
public static <T> Callable<ConnectableFlowable<T>> replayCallable(final Flowable<T> parent, final int bufferSize) {
return new BufferedReplayCallable<T>(parent, bufferSize);
}
public static <T> Callable<ConnectableFlowable<T>> replayCallable(final Flowable<T> parent, final int bufferSize, final long time, final TimeUnit unit, final Scheduler scheduler) {
return new BufferedTimedReplay<T>(parent, bufferSize, time, unit, scheduler);
}
public static <T> Callable<ConnectableFlowable<T>> replayCallable(final Flowable<T> parent, final long time, final TimeUnit unit, final Scheduler scheduler) {
return new TimedReplay<T>(parent, time, unit, scheduler);
}
public static <T, R> Function<Flowable<T>, Publisher<R>> replayFunction(final Function<? super Flowable<T>, ? extends Publisher<R>> selector, final Scheduler scheduler) {
return new ReplayFunction<T, R>(selector, scheduler);
}
public enum RequestMax implements Consumer<Subscription> {
INSTANCE;
@Override
public void accept(Subscription t) throws Exception {
t.request(Long.MAX_VALUE);
}
}
static final class ZipIterableFunction<T, R>
implements Function<List<Publisher<? extends T>>, Publisher<? extends R>> {
private final Function<? super Object[], ? extends R> zipper;
ZipIterableFunction(Function<? super Object[], ? extends R> zipper) {
this.zipper = zipper;
}
@Override
public Publisher<? extends R> apply(List<Publisher<? extends T>> list) {
return Flowable.zipIterable(list, zipper, false, Flowable.bufferSize());
}
}
public static <T, R> Function<List<Publisher<? extends T>>, Publisher<? extends R>> zipIterable(final Function<? super Object[], ? extends R> zipper) {
return new ZipIterableFunction<T, R>(zipper);
}
static final class ReplayCallable<T> implements Callable<ConnectableFlowable<T>> {
private final Flowable<T> parent;
ReplayCallable(Flowable<T> parent) {
this.parent = parent;
}
@Override
public ConnectableFlowable<T> call() {
return parent.replay();
}
}
static final class BufferedReplayCallable<T> implements Callable<ConnectableFlowable<T>> {
private final Flowable<T> parent;
private final int bufferSize;
BufferedReplayCallable(Flowable<T> parent, int bufferSize) {
this.parent = parent;
this.bufferSize = bufferSize;
}
@Override
public ConnectableFlowable<T> call() {
return parent.replay(bufferSize);
}
}
static final class BufferedTimedReplay<T> implements Callable<ConnectableFlowable<T>> {
private final Flowable<T> parent;
private final int bufferSize;
private final long time;
private final TimeUnit unit;
private final Scheduler scheduler;
BufferedTimedReplay(Flowable<T> parent, int bufferSize, long time, TimeUnit unit, Scheduler scheduler) {
this.parent = parent;
this.bufferSize = bufferSize;
this.time = time;
this.unit = unit;
this.scheduler = scheduler;
}
@Override
public ConnectableFlowable<T> call() {
return parent.replay(bufferSize, time, unit, scheduler);
}
}
static final class TimedReplay<T> implements Callable<ConnectableFlowable<T>> {
private final Flowable<T> parent;
private final long time;
private final TimeUnit unit;
private final Scheduler scheduler;
TimedReplay(Flowable<T> parent, long time, TimeUnit unit, Scheduler scheduler) {
this.parent = parent;
this.time = time;
this.unit = unit;
this.scheduler = scheduler;
}
@Override
public ConnectableFlowable<T> call() {
return parent.replay(time, unit, scheduler);
}
}
static final class ReplayFunction<T, R> implements Function<Flowable<T>, Publisher<R>> {
private final Function<? super Flowable<T>, ? extends Publisher<R>> selector;
private final Scheduler scheduler;
ReplayFunction(Function<? super Flowable<T>, ? extends Publisher<R>> selector, Scheduler scheduler) {
this.selector = selector;
this.scheduler = scheduler;
}
@Override
public Publisher<R> apply(Flowable<T> t) throws Exception {
return Flowable.fromPublisher(selector.apply(t)).observeOn(scheduler);
}
}
}