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Reactive Extensions for Java
/**
* 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 extends AbstractObservableWithUpstream {
final Function super Throwable, ? extends ObservableSource extends T>> nextSupplier;
final boolean allowFatal;
public ObservableOnErrorNext(ObservableSource 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 parent = new OnErrorNextObserver(t, nextSupplier, allowFatal);
t.onSubscribe(parent.arbiter);
source.subscribe(parent);
}
static final class OnErrorNextObserver implements Observer {
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();
}
}
}
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