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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.maybe;
import io.reactivex.*;
import io.reactivex.disposables.Disposable;
import io.reactivex.internal.disposables.DisposableHelper;
/**
* Breaks the references between the upstream and downstream when the Maybe terminates.
*
* @param the value type
*/
public final class MaybeDetach extends AbstractMaybeWithUpstream {
public MaybeDetach(MaybeSource source) {
super(source);
}
@Override
protected void subscribeActual(MaybeObserver observer) {
source.subscribe(new DetachMaybeObserver(observer));
}
static final class DetachMaybeObserver implements MaybeObserver, Disposable {
MaybeObserver downstream;
Disposable upstream;
DetachMaybeObserver(MaybeObserver downstream) {
this.downstream = downstream;
}
@Override
public void dispose() {
downstream = null;
upstream.dispose();
upstream = DisposableHelper.DISPOSED;
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
@Override
public void onSubscribe(Disposable d) {
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
}
}
@Override
public void onSuccess(T value) {
upstream = DisposableHelper.DISPOSED;
MaybeObserver a = downstream;
if (a != null) {
downstream = null;
a.onSuccess(value);
}
}
@Override
public void onError(Throwable e) {
upstream = DisposableHelper.DISPOSED;
MaybeObserver a = downstream;
if (a != null) {
downstream = null;
a.onError(e);
}
}
@Override
public void onComplete() {
upstream = DisposableHelper.DISPOSED;
MaybeObserver a = downstream;
if (a != null) {
downstream = null;
a.onComplete();
}
}
}
}