mappers.SquareBlockTraceMultiplicationGroupingMapper.java Source code

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Here is the source code for mappers.SquareBlockTraceMultiplicationGroupingMapper.java

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/*
# DARPA XDATA 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.
#
# Copyright 2013 Raytheon BBN Technologies Corp.  All Rights Reserved. 
#
*/

package mappers;

import java.io.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.*;
import org.apache.hadoop.mapreduce.Mapper;

//import com.bbn.fileformats.*;
import fileformats.*;

public class SquareBlockTraceMultiplicationGroupingMapper extends Mapper<Text, MatrixBlock, Text, MatrixBlock> {

    public Text outKey = new Text();

    public void map(Text key, MatrixBlock value, Context context) throws IOException, InterruptedException {
        Configuration conf = context.getConfiguration();

        boolean lTrans = conf.getBoolean("LTRANS", false);
        boolean rTrans = conf.getBoolean("RTRANS", false);

        String lName = conf.get("LEFTNAME");

        //can get the block indices from the text key or from the .nR and .nC fields
        String line = key.toString();
        String[] parts = line.split(",");
        String name = parts[0];

        //key format is "i,j,k" 
        if (name.equals(lName)) {

            int row = lTrans ? Integer.parseInt(parts[2]) : Integer.parseInt(parts[1]);
            int col = lTrans ? Integer.parseInt(parts[1]) : Integer.parseInt(parts[2]);

            outKey.set(String.valueOf(row) + "," + String.valueOf(row) + "," + String.valueOf(col));
            context.write(outKey, value);
        }

        else {

            int row = rTrans ? Integer.parseInt(parts[2]) : Integer.parseInt(parts[1]);
            int col = rTrans ? Integer.parseInt(parts[1]) : Integer.parseInt(parts[2]);

            outKey.set(String.valueOf(col) + "," + String.valueOf(col) + "," + String.valueOf(row));
            context.write(outKey, value);
        }
    }
}