Example usage for org.apache.hadoop.mapreduce Mapper interface-usage

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce Mapper interface-usage.

Usage

From source file crunch.MaxTemperature.java

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

        private static final int MISSING = 9999;

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

From source file org.ahanna.DoubleConversionMapper.java

class DoubleConversionMapper extends MapReduceBase implements Mapper<Text, Text, Text, Text> {
    final String Digits = "(\\p{Digit}+)";
    final String HexDigits = "(\\p{XDigit}+)";
    // an exponent is 'e' or 'E' followed by an optionally
    // signed decimal integer.
    final String Exp = "[eE][+-]?" + Digits;