rx.internal.operators.OperatorTakeUntil 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.Operator;
import rx.observers.SerializedSubscriber;
/**
* Returns an Observable that emits the items from the source Observable until another Observable
* emits an item.
*
* 
* @param the value type of the 'main' source
* @param the value type of the 'until' sequence
*/
public final class OperatorTakeUntil implements Operator {
private final Observable other;
public OperatorTakeUntil(final Observable other) {
this.other = other;
}
@Override
public Subscriber call(final Subscriber child) {
final Subscriber serial = new SerializedSubscriber(child, false);
final Subscriber main = new Subscriber(serial, false) {
@Override
public void onNext(T t) {
serial.onNext(t);
}
@Override
public void onError(Throwable e) {
try {
serial.onError(e);
} finally {
serial.unsubscribe();
}
}
@Override
public void onCompleted() {
try {
serial.onCompleted();
} finally {
serial.unsubscribe();
}
}
};
final Subscriber so = new Subscriber() {
@Override
public void onStart() {
request(Long.MAX_VALUE);
}
@Override
public void onCompleted() {
main.onCompleted();
}
@Override
public void onError(Throwable e) {
main.onError(e);
}
@Override
public void onNext(E t) {
onCompleted();
}
};
serial.add(main);
serial.add(so);
child.add(serial);
other.unsafeSubscribe(so);
return main;
}
}