com.pagerankcalculator.graphparsing.GraphParsingMapper.java Source code

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Here is the source code for com.pagerankcalculator.graphparsing.GraphParsingMapper.java

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package com.pagerankcalculator.graphparsing;

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

/**
 *
 * @author mfikria
 */
public class GraphParsingMapper extends Mapper<LongWritable, Text, Text, Text> {

    private String userID;
    private String followerID;

    @Override
    public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {

        int tabIndex = value.find("\t");

        userID = Text.decode(value.getBytes(), 0, tabIndex);
        followerID = Text.decode(value.getBytes(), tabIndex + 1, value.getLength() - (tabIndex + 1));
        context.write(new Text(followerID), new Text(userID));
    }
}