/**
* 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 io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.exceptions.*;
import io.reactivex.functions.
Function;
import io.reactivex.internal.disposables.
SequentialDisposable;
import io.reactivex.plugins.
RxJavaPlugins;
public final class
ObservableOnErrorNext<T> extends
AbstractObservableWithUpstream<T, T> {
final
Function<? super
Throwable, ? extends
ObservableSource<? extends T>>
nextSupplier;
final boolean
allowFatal;
public
ObservableOnErrorNext(
ObservableSource<T>
source,
Function<? super
Throwable, ? extends
ObservableSource<? extends T>>
nextSupplier, boolean
allowFatal) {
super(
source);
this.
nextSupplier =
nextSupplier;
this.
allowFatal =
allowFatal;
}
@
Override
public void
subscribeActual(
Observer<? super T>
t) {
OnErrorNextObserver<T>
parent = new
OnErrorNextObserver<T>(
t,
nextSupplier,
allowFatal);
t.
onSubscribe(
parent.
arbiter);
source.
subscribe(
parent);
}
static final class
OnErrorNextObserver<T> implements
Observer<T> {
final
Observer<? super T>
downstream;
final
Function<? super
Throwable, ? extends
ObservableSource<? extends T>>
nextSupplier;
final boolean
allowFatal;
final
SequentialDisposable arbiter;
boolean
once;
boolean
done;
OnErrorNextObserver(
Observer<? super T>
actual,
Function<? super
Throwable, ? extends
ObservableSource<? extends T>>
nextSupplier, boolean
allowFatal) {
this.
downstream =
actual;
this.
nextSupplier =
nextSupplier;
this.
allowFatal =
allowFatal;
this.
arbiter = new
SequentialDisposable();
}
@
Override
public void
onSubscribe(
Disposable d) {
arbiter.
replace(
d);
}
@
Override
public void
onNext(T
t) {
if (
done) {
return;
}
downstream.
onNext(
t);
}
@
Override
public void
onError(
Throwable t) {
if (
once) {
if (
done) {
RxJavaPlugins.
onError(
t);
return;
}
downstream.
onError(
t);
return;
}
once = true;
if (
allowFatal && !(
t instanceof
Exception)) {
downstream.
onError(
t);
return;
}
ObservableSource<? extends T>
p;
try {
p =
nextSupplier.
apply(
t);
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
downstream.
onError(new
CompositeException(
t,
e));
return;
}
if (
p == null) {
NullPointerException npe = new
NullPointerException("Observable is null");
npe.
initCause(
t);
downstream.
onError(
npe);
return;
}
p.
subscribe(this);
}
@
Override
public void
onComplete() {
if (
done) {
return;
}
done = true;
once = true;
downstream.
onComplete();
}
}
}