/**
* 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.*;
import rx.
Observable.
OnSubscribe;
import rx.exceptions.
Exceptions;
import rx.functions.*;
public final class
OnSubscribeCollect<T, R> implements
OnSubscribe<R> {
final
Observable<T>
source;
final
Func0<R>
collectionFactory;
final
Action2<R, ? super T>
collector;
public
OnSubscribeCollect(
Observable<T>
source,
Func0<R>
collectionFactory,
Action2<R, ? super T>
collector) {
this.
source =
source;
this.
collectionFactory =
collectionFactory;
this.
collector =
collector;
}
@
Override
public void
call(
Subscriber<? super R>
t) {
R
initialValue;
try {
initialValue =
collectionFactory.
call();
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
t.
onError(
ex);
return;
}
new
CollectSubscriber<T, R>(
t,
initialValue,
collector).
subscribeTo(
source);
}
static final class
CollectSubscriber<T, R> extends
DeferredScalarSubscriberSafe<T, R> {
final
Action2<R, ? super T>
collector;
public
CollectSubscriber(
Subscriber<? super R>
actual, R
initialValue,
Action2<R, ? super T>
collector) {
super(
actual);
this.
value =
initialValue;
this.
hasValue = true;
this.
collector =
collector;
}
@
Override
public void
onNext(T
t) {
if (
done) {
return;
}
try {
collector.
call(
value,
t);
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
unsubscribe();
onError(
ex);
}
}
}
}