hu.akarnokd.rxjava.interop.ObservableV1ToObservableV2 Maven / Gradle / Ivy
/*
* Copyright 2016-2018 David Karnok
*
* 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 hu.akarnokd.rxjava.interop;
/**
* Convert a V1 Observable into a V2 Observable, composing cancellation.
*
* @param the value type
*/
final class ObservableV1ToObservableV2 extends io.reactivex.Observable {
final rx.Observable source;
ObservableV1ToObservableV2(rx.Observable source) {
this.source = source;
}
@Override
protected void subscribeActual(io.reactivex.Observer s) {
ObservableSubscriber parent = new ObservableSubscriber(s);
s.onSubscribe(parent);
source.unsafeSubscribe(parent);
}
static final class ObservableSubscriber extends rx.Subscriber
implements io.reactivex.disposables.Disposable {
final io.reactivex.Observer actual;
boolean done;
ObservableSubscriber(io.reactivex.Observer actual) {
this.actual = actual;
}
@Override
public void onNext(T t) {
if (done) {
return;
}
if (t == null) {
unsubscribe();
onError(new NullPointerException(
"The upstream 1.x Observable signalled a null value which is not supported in 2.x"));
} else {
actual.onNext(t);
}
}
@Override
public void onError(Throwable e) {
if (done) {
io.reactivex.plugins.RxJavaPlugins.onError(e);
return;
}
done = true;
actual.onError(e);
unsubscribe(); // v1 expects an unsubscribe call when terminated
}
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
actual.onComplete();
unsubscribe(); // v1 expects an unsubscribe call when terminated
}
@Override
public void dispose() {
unsubscribe();
}
@Override
public boolean isDisposed() {
return isUnsubscribed();
}
}
}