/**
* 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.observable;
import java.util.concurrent.
Callable;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.exceptions.*;
import io.reactivex.functions.
Function;
import io.reactivex.internal.disposables.
DisposableHelper;
import io.reactivex.internal.functions.
ObjectHelper;
public final class
ObservableMapNotification<T, R> extends
AbstractObservableWithUpstream<T,
ObservableSource<? extends R>> {
final
Function<? super T, ? extends
ObservableSource<? extends R>>
onNextMapper;
final
Function<? super
Throwable, ? extends
ObservableSource<? extends R>>
onErrorMapper;
final
Callable<? extends
ObservableSource<? extends R>>
onCompleteSupplier;
public
ObservableMapNotification(
ObservableSource<T>
source,
Function<? super T, ? extends
ObservableSource<? extends R>>
onNextMapper,
Function<? super
Throwable, ? extends
ObservableSource<? extends R>>
onErrorMapper,
Callable<? extends
ObservableSource<? extends R>>
onCompleteSupplier) {
super(
source);
this.
onNextMapper =
onNextMapper;
this.
onErrorMapper =
onErrorMapper;
this.
onCompleteSupplier =
onCompleteSupplier;
}
@
Override
public void
subscribeActual(
Observer<? super
ObservableSource<? extends R>>
t) {
source.
subscribe(new
MapNotificationObserver<T, R>(
t,
onNextMapper,
onErrorMapper,
onCompleteSupplier));
}
static final class
MapNotificationObserver<T, R>
implements
Observer<T>,
Disposable {
final
Observer<? super
ObservableSource<? extends R>>
downstream;
final
Function<? super T, ? extends
ObservableSource<? extends R>>
onNextMapper;
final
Function<? super
Throwable, ? extends
ObservableSource<? extends R>>
onErrorMapper;
final
Callable<? extends
ObservableSource<? extends R>>
onCompleteSupplier;
Disposable upstream;
MapNotificationObserver(
Observer<? super
ObservableSource<? extends R>>
actual,
Function<? super T, ? extends
ObservableSource<? extends R>>
onNextMapper,
Function<? super
Throwable, ? extends
ObservableSource<? extends R>>
onErrorMapper,
Callable<? extends
ObservableSource<? extends R>>
onCompleteSupplier) {
this.
downstream =
actual;
this.
onNextMapper =
onNextMapper;
this.
onErrorMapper =
onErrorMapper;
this.
onCompleteSupplier =
onCompleteSupplier;
}
@
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) {
ObservableSource<? extends R>
p;
try {
p =
ObjectHelper.
requireNonNull(
onNextMapper.
apply(
t), "The onNext ObservableSource returned is null");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
downstream.
onError(
e);
return;
}
downstream.
onNext(
p);
}
@
Override
public void
onError(
Throwable t) {
ObservableSource<? extends R>
p;
try {
p =
ObjectHelper.
requireNonNull(
onErrorMapper.
apply(
t), "The onError ObservableSource returned is null");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
downstream.
onError(new
CompositeException(
t,
e));
return;
}
downstream.
onNext(
p);
downstream.
onComplete();
}
@
Override
public void
onComplete() {
ObservableSource<? extends R>
p;
try {
p =
ObjectHelper.
requireNonNull(
onCompleteSupplier.
call(), "The onComplete ObservableSource returned is null");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
downstream.
onError(
e);
return;
}
downstream.
onNext(
p);
downstream.
onComplete();
}
}
}