rx.internal.operators.OperatorAll 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.Observable.Operator;
import rx.Subscriber;
import rx.exceptions.Exceptions;
import rx.functions.Func1;
import rx.internal.producers.SingleDelayedProducer;
/**
* Returns an Observable that emits a Boolean that indicates whether all items emitted by an
* Observable satisfy a condition.
*
* 
*/
public final class OperatorAll implements Operator {
private final Func1 predicate;
public OperatorAll(Func1 predicate) {
this.predicate = predicate;
}
@Override
public Subscriber call(final Subscriber child) {
final SingleDelayedProducer producer = new SingleDelayedProducer(child);
Subscriber s = new Subscriber() {
boolean done;
@Override
public void onNext(T t) {
Boolean result;
try {
result = predicate.call(t);
} catch (Throwable e) {
Exceptions.throwOrReport(e, this, t);
return;
}
if (!result && !done) {
done = true;
producer.setValue(false);
unsubscribe();
}
// note that don't need to request more of upstream because this subscriber
// defaults to requesting Long.MAX_VALUE
}
@Override
public void onError(Throwable e) {
child.onError(e);
}
@Override
public void onCompleted() {
if (!done) {
done = true;
producer.setValue(true);
}
}
};
child.add(s);
child.setProducer(producer);
return s;
}
}