

package io.reactivex.internal.operators.flowable;

import org.reactivestreams.*;

import io.reactivex.internal.subscriptions.SubscriptionHelper;
import io.reactivex.internal.util.EmptyComponent;

public final class FlowableDetach<T> extends AbstractFlowableWithUpstream<T, T> {

    public FlowableDetach(Publisher<T> source) {
        super(source);
    }

    @Override
    protected void subscribeActual(Subscriber<? super T> s) {
        source.subscribe(new DetachSubscriber<T>(s));
    }

    static final class DetachSubscriber<T> implements Subscriber<T>, Subscription {

        Subscriber<? super T> actual;

        Subscription s;

        DetachSubscriber(Subscriber<? super T> actual) {
            this.actual = actual;
        }

        @Override
        public void request(long n) {
            s.request(n);
        }

        @Override
        public void cancel() {
            Subscription s = this.s;
            this.s = EmptyComponent.INSTANCE;
            this.actual = EmptyComponent.asSubscriber();
            s.cancel();
        }

        @Override
        public void onSubscribe(Subscription s) {
            if (SubscriptionHelper.validate(this.s, s)) {
                this.s = s;

                actual.onSubscribe(this);
            }
        }

        @Override
        public void onNext(T t) {
            actual.onNext(t);
        }

        @Override
        public void onError(Throwable t) {
            Subscriber<? super T> a = actual;
            this.s = EmptyComponent.INSTANCE;
            this.actual = EmptyComponent.asSubscriber();
            a.onError(t);
        }

        @Override
        public void onComplete() {
            Subscriber<? super T> a = actual;
            this.s = EmptyComponent.INSTANCE;
            this.actual = EmptyComponent.asSubscriber();
            a.onComplete();
        }
    }
}

