/**
* 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.*;
/**
* Returns an Observable that skips the first <code>num</code> items emitted by the source
* Observable.
* <p>
* <img width="640" src="https://github.com/ReactiveX/RxJava/wiki/images/rx-operators/skip.png" alt="">
* <p>
* You can ignore the first <code>num</code> items emitted by an Observable and attend only to
* those items that come after, by modifying the Observable with the {@code skip} operator.
* @param <T> the value type
*/
public final class
OperatorSkip<T> implements
Observable.
Operator<T, T> {
final int
toSkip;
public
OperatorSkip(int
n) {
if (
n < 0) {
throw new
IllegalArgumentException("n >= 0 required but it was " +
n);
}
this.
toSkip =
n;
}
@
Override
public
Subscriber<? super T>
call(final
Subscriber<? super T>
child) {
return new
Subscriber<T>(
child) {
int
skipped;
@
Override
public void
onCompleted() {
child.
onCompleted();
}
@
Override
public void
onError(
Throwable e) {
child.
onError(
e);
}
@
Override
public void
onNext(T
t) {
if (
skipped >=
toSkip) {
child.
onNext(
t);
} else {
skipped += 1;
}
}
@
Override
public void
setProducer(final
Producer producer) {
child.
setProducer(
producer);
producer.
request(
toSkip);
}
};
}
}