MapReduceFunPost-Mapper.java

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

public final class PlayerBattingMapper extends Mapper<LongWritable, Text, Text, Text> {

    /*
     * The map method runs once for each line of text in the input file. The method receives a key
     * of type LongWritable, a value of type Text, and a Context object.
     */
    @Override
    public void map(LongWritable key, Text value, Context context)
        throws IOException, InterruptedException {

        // logic to deal with the line of text (value variable) goes here

        // emit key, value
        context.write(new Text(battingData[0]), new Text(sb.toString()));
    }
}