com.pagerankcalculator.ordering.PageRankSortingMapper.java Source code

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Here is the source code for com.pagerankcalculator.ordering.PageRankSortingMapper.java

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package com.pagerankcalculator.ordering;

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

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

    @Override
    public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        int tabIdx1 = value.find("\t");
        int tabIdx2 = value.find("\t", tabIdx1 + 1);

        String username = Text.decode(value.getBytes(), 0, tabIdx1);

        Double pageRank = new Double(Text.decode(value.getBytes(), tabIdx1 + 1, tabIdx2 - (tabIdx1 + 1)));

        context.write(new DoubleWritable(pageRank), new Text(username));
    }

}