rx.internal.operators.OnSubscribeDelaySubscriptionWithSelector Maven / Gradle / Ivy
/**
* Copyright 2014 Netflix, Inc.
*
* 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 rx.internal.operators;
import rx.*;
import rx.Observable.OnSubscribe;
import rx.exceptions.Exceptions;
import rx.functions.Func0;
import rx.observers.Subscribers;
/**
* Delays the subscription until the Observable emits an event.
*
* @param
* the value type
* @param the value type of the Observable triggering the delayed subscription
*/
public final class OnSubscribeDelaySubscriptionWithSelector implements OnSubscribe {
final Observable extends T> source;
final Func0 extends Observable> subscriptionDelay;
public OnSubscribeDelaySubscriptionWithSelector(Observable extends T> source, Func0 extends Observable> subscriptionDelay) {
this.source = source;
this.subscriptionDelay = subscriptionDelay;
}
@Override
public void call(final Subscriber super T> child) {
try {
subscriptionDelay.call().take(1).unsafeSubscribe(new Subscriber() {
@Override
public void onCompleted() {
// subscribe to actual source
source.unsafeSubscribe(Subscribers.wrap(child));
}
@Override
public void onError(Throwable e) {
child.onError(e);
}
@Override
public void onNext(U t) {
// ignore as we'll complete immediately because of take(1)
}
});
} catch (Throwable e) {
Exceptions.throwOrReport(e, child);
}
}
}
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