/**
* 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;
import rx.plugins.
RxJavaHooks;
/**
* Returns an Observable that emits a Boolean that indicates whether all items emitted by an
* Observable satisfy a condition.
* <p>
* <img width="640" src="https://github.com/ReactiveX/RxJava/wiki/images/rx-operators/all.png" alt="">
* @param <T> the value type
*/
public final class
OperatorAll<T> implements
Operator<
Boolean, T> {
final
Func1<? super T,
Boolean>
predicate;
public
OperatorAll(
Func1<? super T,
Boolean>
predicate) {
this.
predicate =
predicate;
}
@
Override
public
Subscriber<? super T>
call(final
Subscriber<? super
Boolean>
child) {
final
SingleDelayedProducer<
Boolean>
producer = new
SingleDelayedProducer<
Boolean>(
child);
Subscriber<T>
s = new
Subscriber<T>() {
boolean
done;
@
Override
public void
onNext(T
t) {
if (
done) {
return;
}
Boolean result;
try {
result =
predicate.
call(
t);
} catch (
Throwable e) {
Exceptions.
throwOrReport(
e, this,
t);
return;
}
if (!
result) {
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) {
if (!
done) {
done = true;
child.
onError(
e);
} else {
RxJavaHooks.
onError(
e);
}
}
@
Override
public void
onCompleted() {
if (!
done) {
done = true;
producer.
setValue(true);
}
}
};
child.
add(
s);
child.
setProducer(
producer);
return
s;
}
}