/**
* 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;
public final class
OnSubscribeTakeLastOne<T> implements
OnSubscribe<T> {
final
Observable<T>
source;
public
OnSubscribeTakeLastOne(
Observable<T>
source) {
this.
source =
source;
}
@
Override
public void
call(
Subscriber<? super T>
t) {
new
TakeLastOneSubscriber<T>(
t).
subscribeTo(
source);
}
static final class
TakeLastOneSubscriber<T> extends
DeferredScalarSubscriber<T, T> {
static final
Object EMPTY = new
Object();
@
SuppressWarnings("unchecked")
public
TakeLastOneSubscriber(
Subscriber<? super T>
actual) {
super(
actual);
this.
value = (T)
EMPTY;
}
@
Override
public void
onNext(T
t) {
value =
t;
}
@
SuppressWarnings("unchecked")
@
Override
public void
onCompleted() {
Object o =
value;
if (
o ==
EMPTY) {
complete();
} else {
complete((T)
o);
}
}
}
}