/**
* 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 io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.exceptions.*;
import io.reactivex.functions.
Function;
public final class
SingleOnErrorReturn<T> extends
Single<T> {
final
SingleSource<? extends T>
source;
final
Function<? super
Throwable, ? extends T>
valueSupplier;
final T
value;
public
SingleOnErrorReturn(
SingleSource<? extends T>
source,
Function<? super
Throwable, ? extends T>
valueSupplier, T
value) {
this.
source =
source;
this.
valueSupplier =
valueSupplier;
this.
value =
value;
}
@
Override
protected void
subscribeActual(final
SingleObserver<? super T>
observer) {
source.
subscribe(new
OnErrorReturn(
observer));
}
final class
OnErrorReturn implements
SingleObserver<T> {
private final
SingleObserver<? super T>
observer;
OnErrorReturn(
SingleObserver<? super T>
observer) {
this.
observer =
observer;
}
@
Override
public void
onError(
Throwable e) {
T
v;
if (
valueSupplier != null) {
try {
v =
valueSupplier.
apply(
e);
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
observer.
onError(new
CompositeException(
e,
ex));
return;
}
} else {
v =
value;
}
if (
v == null) {
NullPointerException npe = new
NullPointerException("Value supplied was null");
npe.
initCause(
e);
observer.
onError(
npe);
return;
}
observer.
onSuccess(
v);
}
@
Override
public void
onSubscribe(
Disposable d) {
observer.
onSubscribe(
d);
}
@
Override
public void
onSuccess(T
value) {
observer.
onSuccess(
value);
}
}
}