org.apache.hadoop.mapreduce.lib.map
Class InverseMapper<K,V>

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<K,V,V,K>
      org.apache.hadoop.mapreduce.lib.map.InverseMapper<K,V>

@InterfaceAudience.Public
@InterfaceStability.Stable
public class InverseMapper<K,V>
extends Mapper<K,V,V,K>

A Mapper that swaps keys and values.

Constructor Summary

InverseMapper()

Method Summary

void	map(K key, V value, org.apache.hadoop.mapreduce.Mapper.Context context) The inverse function.

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InverseMapper

public InverseMapper()

Method Detail

map

public void map(K key,
                V value,
                org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException,
                InterruptedException

The inverse function. Input keys and values are swapped.

Overrides:

map in class Mapper<K,V,V,K>

Throws:

IOException

InterruptedException