averagetemperature.AverageTemperatureMapper.java Source code

Introduction

Here is the source code for averagetemperature.AverageTemperatureMapper.java

Source

package averagetemperature;
/*
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/**
 *
 * @author slave
 */
import java.io.IOException;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;

public class AverageTemperatureMapper extends MapReduceBase
        implements Mapper<LongWritable, Text, Text, IntWritable> {

    @Override
    public void map(LongWritable key, Text value, OutputCollector<Text, IntWritable> output, Reporter reporter)
            throws IOException {

        String[] line = value.toString().split(",");
        String datePart = line[1];
        String temp = line[10];

        if (StringUtils.isNumeric(temp))
            try {
                output.collect(new Text(datePart), new IntWritable(Integer.parseInt(temp)));
            } catch (NumberFormatException e) {
            }
        ;

    }

}