/*

  * 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.giraph.reducers.impl;

 import java.io.DataInput;

 import java.io.DataOutput;

 import java.io.IOException;

 import org.apache.giraph.reducers.ReduceSameTypeOperation;

 import org.apache.hadoop.io.BooleanWritable;

 /**

  *

  * ReduceOperation for calculating the OR function over boolean values.

  * The default value when nothing is aggregated is false.

  *

  */

 public class OrReduce extends ReduceSameTypeOperation<BooleanWritable> {

   /** Instance */

   public static final OrReduce INSTANCE = new OrReduce();

   @Override

   public BooleanWritable createInitialValue() {

     return new BooleanWritable(false);

   }

   @Override

   public BooleanWritable reduce(

       BooleanWritable curValue, BooleanWritable valueToReduce) {

     curValue.set(curValue.get() || valueToReduce.get());

     return curValue;

   }

   @Override

   public void write(DataOutput out) throws IOException {

   }

   @Override

   public void readFields(DataInput in) throws IOException {

   }

 }