/**
* 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.Observable;
import rx.Observable.OnSubscribe;
import rx.Scheduler;
import rx.Subscriber;
import rx.subjects.Subject;
/**
* Replay with limited buffer and/or time constraints.
*
*
* @see <a href='http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.replay.aspx'>MSDN: Observable.Replay overloads</a>
*/
public final class OperatorReplay {
/** Utility class. */
private OperatorReplay() {
throw new IllegalStateException("No instances!");
}
/**
* Creates a subject whose client observers will observe events
* propagated through the given wrapped subject.
* @param <T> the element type
* @param subject the subject to wrap
* @param scheduler the target scheduler
* @return the created subject
*/
public static <T> Subject<T, T> createScheduledSubject(Subject<T, T> subject, Scheduler scheduler) {
final Observable<T> observedOn = subject.observeOn(scheduler);
SubjectWrapper<T> s = new SubjectWrapper<T>(new OnSubscribe<T>() {
@Override
public void call(Subscriber<? super T> o) {
subscriberOf(observedOn).call(o);
}
}, subject);
return s;
}
/**
* Return an OnSubscribeFunc which delegates the subscription to the given observable.
*
* @param <T> the value type
* @param target the target observable
* @return the function that delegates the subscription to the target
*/
public static <T> OnSubscribe<T> subscriberOf(final Observable<T> target) {
return new OnSubscribe<T>() {
@Override
public void call(Subscriber<? super T> t1) {
target.unsafeSubscribe(t1);
}
};
}
/**
* A subject that wraps another subject.
* @param <T> the value type
*/
public static final class SubjectWrapper<T> extends Subject<T, T> {
/** The wrapped subject. */
final Subject<T, T> subject;
public SubjectWrapper(OnSubscribe<T> func, Subject<T, T> subject) {
super(func);
this.subject = subject;
}
@Override
public void onNext(T args) {
subject.onNext(args);
}
@Override
public void onError(Throwable e) {
subject.onError(e);
}
@Override
public void onCompleted() {
subject.onCompleted();
}
}
}