1/*2 * Licensed to the Apache Software Foundation (ASF) under one3 * or more contributor license agreements. See the NOTICE file4 * distributed with this work for additional information5 * regarding copyright ownership. The ASF licenses this file6 * to you under the Apache License, Version 2.0 (the7 * "License"); you may not use this file except in compliance8 * with the License. You may obtain a copy of the License at9 *10 * http://www.apache.org/licenses/LICENSE-2.011 *12 * Unless required by applicable law or agreed to in writing, software13 * distributed under the License is distributed on an "AS IS" BASIS,14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.15 * See the License for the specific language governing permissions and16 * limitations under the License.17 */18package org.apache.giraph.reducers.impl;
1920import java.io.DataInput;
21import java.io.DataOutput;
22import java.io.IOException;
2324import org.apache.giraph.reducers.ReduceSameTypeOperation;
25import org.apache.hadoop.io.BooleanWritable;
2627/**28 *29 * ReduceOperation for calculating the OR function over boolean values.30 * The default value when nothing is aggregated is false.31 *32 */33publicclassOrReduceextends ReduceSameTypeOperation<BooleanWritable> {
34/** Instance */35publicstaticfinalOrReduce INSTANCE = newOrReduce();
3637 @Override
38public BooleanWritable createInitialValue() {
39returnnew BooleanWritable(false);
40 }
4142 @Override
43public BooleanWritable reduce(
44 BooleanWritable curValue, BooleanWritable valueToReduce) {
45 curValue.set(curValue.get() || valueToReduce.get());
46return curValue;
47 }
4849 @Override
50publicvoid write(DataOutput out) throws IOException {
51 }
5253 @Override
54publicvoid readFields(DataInput in) throws IOException {
55 }
56 }