reactor.rx.action.transformation.DefaultIfEmptyAction Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2015 Pivotal Software Inc., Inc. All Rights Reserved.
*
* 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.transformation;
import reactor.rx.action.Action;
/**
* @author Stephane Maldini
* @since 2.0
*/
public class DefaultIfEmptyAction extends Action {
private final T defaultValue;
private boolean hasValues = false;
public DefaultIfEmptyAction(T defaultValue) {
this.defaultValue = defaultValue;
}
@Override
protected void doNext(T ev) {
hasValues = true;
broadcastNext(ev);
}
@Override
protected void doComplete() {
if(!hasValues){
broadcastNext(defaultValue);
}
broadcastComplete();
}
}