/**
* Copyright 2016 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.
Subscriber;
import rx.plugins.
RxJavaHooks;
/**
* Supplements {@code DeferredScalarSubscriber} with defensive behaviour that ensures no emissions
* occur after a terminal event. If {@code onError} is called more than once then errors after the first
* are reported to {@code RxJavaHooks.onError}.
*
* @param <T> source value type
* @param <R> result value type
*/
public abstract class
DeferredScalarSubscriberSafe<T, R> extends
DeferredScalarSubscriber<T,R> {
protected boolean
done;
public
DeferredScalarSubscriberSafe(
Subscriber<? super R>
actual) {
super(
actual);
}
@
Override
public void
onError(
Throwable ex) {
if (!
done) {
done = true;
super.onError(
ex);
} else {
RxJavaHooks.
onError(
ex);
}
}
@
Override
public void
onCompleted() {
if (
done) {
return;
}
done = true;
super.onCompleted();
}
}