com.cloudera.crunch.fn
Class PairMapFn<K,V,S,T>

java.lang.Object
  com.cloudera.crunch.DoFn<S,T>
      com.cloudera.crunch.MapFn<Pair<K,V>,Pair<S,T>>
          com.cloudera.crunch.fn.PairMapFn<K,V,S,T>

All Implemented Interfaces:

Serializable

public class PairMapFn<K,V,S,T>
extends MapFn<Pair<K,V>,Pair<S,T>>

See Also:

Serialized Form

Constructor Summary

PairMapFn(MapFn<K,S> keys, MapFn<V,T> values)

Method Summary

void	initialize() Called during the setup of the MapReduce job this DoFn is associated with.
Pair<S,T>	map(Pair<K,V> input) Maps the given input into an instance of the output type.

Methods inherited from class com.cloudera.crunch.MapFn

process, scaleFactor

Methods inherited from class com.cloudera.crunch.DoFn

cleanup, configure, getConfiguration, getCounter, getCounter, getStatus, getTaskAttemptID, progress, setConfigurationForTest, setContext, setStatus

Methods inherited from class java.lang.Object

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

Constructor Detail

PairMapFn

public PairMapFn(MapFn<K,S> keys,
                 MapFn<V,T> values)

Method Detail

initialize

public void initialize()

Description copied from class: DoFn

Called during the setup of the MapReduce job this DoFn is associated with. Subclasses may override this method to do appropriate initialization.

Overrides:

initialize in class DoFn<Pair<K,V>,Pair<S,T>>

map

public Pair<S,T> map(Pair<K,V> input)

Description copied from class: MapFn

Maps the given input into an instance of the output type.

Specified by:

map in class MapFn<Pair<K,V>,Pair<S,T>>