reactor.rx.action.conditional.ExistsAction Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2014 Pivotal Software, 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 reactor.rx.action.conditional;
import reactor.fn.Predicate;
import reactor.rx.action.Action;
/**
* @author Anatoly Kadyshev
* @since 2.0
*/
public class ExistsAction extends Action {
private final Predicate predicate;
private boolean elementFound;
public ExistsAction(Predicate predicate) {
this.predicate = predicate;
}
@Override
protected void doNext(T ev) {
if (predicate.test(ev)) {
elementFound = true;
cancel();
broadcastNext(true);
broadcastComplete();
}
}
@Override
protected void doComplete() {
if (!elementFound) {
broadcastNext(false);
}
super.doComplete();
}
}