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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.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 extends Single {
final SingleSource source;
final Function mapper;
public SingleMap(SingleSource source, Function mapper) {
this.source = source;
this.mapper = mapper;
}
@Override
protected void subscribeActual(final SingleObserver t) {
source.subscribe(new MapSingleObserver(t, mapper));
}
static final class MapSingleObserver implements SingleObserver {
final SingleObserver t;
final Function mapper;
MapSingleObserver(SingleObserver t, Function 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);
}
}
}