package demos;

import java.io.IOException;
import java.util.Iterator;
import java.util.StringTokenizer;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BooleanWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;

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

	private static final IntWritable one = new IntWritable(1);
	private IntWritable freq = new IntWritable();

	public void map(LongWritable key, Text value, OutputCollector<IntWritable, IntWritable> output, Reporter reporter)
			throws IOException {
		String[] parts = value.toString().split("\\t");
		freq.set(Integer.parseInt(parts[1]));
		output.collect(freq, one);
	}
}