/**
* 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.
Exceptions;
import io.reactivex.functions.
Function;
import io.reactivex.internal.functions.
ObjectHelper;
public final class
SingleMap<T, R> extends
Single<R> {
final
SingleSource<? extends T>
source;
final
Function<? super T, ? extends R>
mapper;
public
SingleMap(
SingleSource<? extends T>
source,
Function<? super T, ? extends R>
mapper) {
this.
source =
source;
this.
mapper =
mapper;
}
@
Override
protected void
subscribeActual(final
SingleObserver<? super R>
t) {
source.
subscribe(new
MapSingleObserver<T, R>(
t,
mapper));
}
static final class
MapSingleObserver<T, R> implements
SingleObserver<T> {
final
SingleObserver<? super R>
t;
final
Function<? super T, ? extends R>
mapper;
MapSingleObserver(
SingleObserver<? super R>
t,
Function<? super T, ? extends R>
mapper) {
this.
t =
t;
this.
mapper =
mapper;
}
@
Override
public void
onSubscribe(
Disposable d) {
t.
onSubscribe(
d);
}
@
Override
public void
onSuccess(T
value) {
R
v;
try {
v =
ObjectHelper.
requireNonNull(
mapper.
apply(
value), "The mapper function returned a null value.");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
onError(
e);
return;
}
t.
onSuccess(
v);
}
@
Override
public void
onError(
Throwable e) {
t.
onError(
e);
}
}
}