org.apache.crunch.fn

Class SwapFn<V1,V2>

java.lang.Object

org.apache.crunch.DoFn<S,T>

org.apache.crunch.MapFn<Pair<V1,V2>,Pair<V2,V1>>

org.apache.crunch.fn.SwapFn<V1,V2>

All Implemented Interfaces:

Serializable

public class SwapFn<V1,V2>
extends MapFn<Pair<V1,V2>,Pair<V2,V1>>

Swap the elements of a Pair type.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SwapFn()

Method Summary

Modifier and Type	Method and Description
Pair<V2,V1>	map(Pair<V1,V2> input) Maps the given input into an instance of the output type.
static <V1,V2> PType<Pair<V2,V1>>	ptype(PType<Pair<V1,V2>> pt)
static <K,V> PTableType<V,K>	tableType(PTableType<K,V> ptt)

Methods inherited from class org.apache.crunch.MapFn

process, scaleFactor

Methods inherited from class org.apache.crunch.DoFn

cleanup, configure, disableDeepCopy, initialize, setConfiguration, setContext

Methods inherited from class java.lang.Object

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

Constructor Detail

SwapFn

public SwapFn()

Method Detail

ptype

public static <V1,V2> PType<Pair<V2,V1>> ptype(PType<Pair<V1,V2>> pt)

tableType

public static <K,V> PTableType<V,K> tableType(PTableType<K,V> ptt)

map

public Pair<V2,V1> map(Pair<V1,V2> input)

Description copied from class: MapFn

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

Specified by:

map in class MapFn<Pair<V1,V2>,Pair<V2,V1>>