/**
* 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.
Func2;
public final class
OnSubscribeReduceSeed<T, R> implements
OnSubscribe<R> {
final
Observable<T>
source;
final R
initialValue;
final
Func2<R, ? super T, R>
reducer;
public
OnSubscribeReduceSeed(
Observable<T>
source, R
initialValue,
Func2<R, ? super T, R>
reducer) {
this.
source =
source;
this.
initialValue =
initialValue;
this.
reducer =
reducer;
}
@
Override
public void
call(
Subscriber<? super R>
t) {
new
ReduceSeedSubscriber<T, R>(
t,
initialValue,
reducer).
subscribeTo(
source);
}
static final class
ReduceSeedSubscriber<T, R> extends
DeferredScalarSubscriber<T, R> {
final
Func2<R, ? super T, R>
reducer;
public
ReduceSeedSubscriber(
Subscriber<? super R>
actual, R
initialValue,
Func2<R, ? super T, R>
reducer) {
super(
actual);
this.
value =
initialValue;
this.
hasValue = true;
this.
reducer =
reducer;
}
@
Override
public void
onNext(T
t) {
try {
value =
reducer.
call(
value,
t);
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
unsubscribe();
actual.
onError(
ex);
}
}
}
}