/**
* 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.single;
import java.util.concurrent.atomic.
AtomicReference;
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;
import io.reactivex.internal.observers.
ResumeSingleObserver;
public final class
SingleResumeNext<T> extends
Single<T> {
final
SingleSource<? extends T>
source;
final
Function<? super
Throwable, ? extends
SingleSource<? extends T>>
nextFunction;
public
SingleResumeNext(
SingleSource<? extends T>
source,
Function<? super
Throwable, ? extends
SingleSource<? extends T>>
nextFunction) {
this.
source =
source;
this.
nextFunction =
nextFunction;
}
@
Override
protected void
subscribeActual(final
SingleObserver<? super T>
observer) {
source.
subscribe(new
ResumeMainSingleObserver<T>(
observer,
nextFunction));
}
static final class
ResumeMainSingleObserver<T> extends
AtomicReference<
Disposable>
implements
SingleObserver<T>,
Disposable {
private static final long
serialVersionUID = -5314538511045349925L;
final
SingleObserver<? super T>
downstream;
final
Function<? super
Throwable, ? extends
SingleSource<? extends T>>
nextFunction;
ResumeMainSingleObserver(
SingleObserver<? super T>
actual,
Function<? super
Throwable, ? extends
SingleSource<? extends T>>
nextFunction) {
this.
downstream =
actual;
this.
nextFunction =
nextFunction;
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
setOnce(this,
d)) {
downstream.
onSubscribe(this);
}
}
@
Override
public void
onSuccess(T
value) {
downstream.
onSuccess(
value);
}
@
Override
public void
onError(
Throwable e) {
SingleSource<? extends T>
source;
try {
source =
ObjectHelper.
requireNonNull(
nextFunction.
apply(
e), "The nextFunction returned a null SingleSource.");
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
downstream.
onError(new
CompositeException(
e,
ex));
return;
}
source.
subscribe(new
ResumeSingleObserver<T>(this,
downstream));
}
@
Override
public void
dispose() {
DisposableHelper.
dispose(this);
}
@
Override
public boolean
isDisposed() {
return
DisposableHelper.
isDisposed(
get());
}
}
}