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/**
 * 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.completable;

import io.reactivex.*;
import io.reactivex.disposables.Disposable;
import io.reactivex.internal.disposables.DisposableHelper;

/**
 * Breaks the references between the upstream and downstream when the Completable terminates.
 * 

History: 2.1.5 - experimental * @since 2.2 */ public final class CompletableDetach extends Completable { final CompletableSource source; public CompletableDetach(CompletableSource source) { this.source = source; } @Override protected void subscribeActual(CompletableObserver observer) { source.subscribe(new DetachCompletableObserver(observer)); } static final class DetachCompletableObserver implements CompletableObserver, Disposable { CompletableObserver downstream; Disposable upstream; DetachCompletableObserver(CompletableObserver 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 onError(Throwable e) { upstream = DisposableHelper.DISPOSED; CompletableObserver a = downstream; if (a != null) { downstream = null; a.onError(e); } } @Override public void onComplete() { upstream = DisposableHelper.DISPOSED; CompletableObserver a = downstream; if (a != null) { downstream = null; a.onComplete(); } } } }





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