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OperatorIgnoreElements.java
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OperatorIgnoreElements.java
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/**
* 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.Observable.Operator;
import rx.Subscriber;
public class OperatorIgnoreElements<T> implements Operator<T, T> {
private static class Holder {
static final OperatorIgnoreElements<?> INSTANCE = new OperatorIgnoreElements<Object>();
}
@SuppressWarnings("unchecked")
public static <T> OperatorIgnoreElements<T> instance() {
return (OperatorIgnoreElements<T>) Holder.INSTANCE;
}
private OperatorIgnoreElements() {
}
@Override
public Subscriber<? super T> call(final Subscriber<? super T> child) {
Subscriber<T> parent = new Subscriber<T>() {
@Override
public void onCompleted() {
child.onCompleted();
}
@Override
public void onError(Throwable e) {
child.onError(e);
}
@Override
public void onNext(T t) {
// ignore element
}
};
child.add(parent);
return parent;
}
}