/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tinkerpop.gremlin.process.computer.ranking.pagerank;
import org.apache.tinkerpop.gremlin.process.computer.MessageCombiner;
import java.util.Optional;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
*/
public class PageRankMessageCombiner implements MessageCombiner<Double> {
private static final Optional<PageRankMessageCombiner> INSTANCE = Optional.of(new PageRankMessageCombiner());
private PageRankMessageCombiner() {
}
@Override
public Double combine(final Double messageA, final Double messageB) {
return messageA + messageB;
}
public static Optional<PageRankMessageCombiner> instance() {
return INSTANCE;
}
}