org.apache.crunch.lib.sort

Class SortFns.TupleKeyFn<V extends Tuple,K extends Tuple>

java.lang.Object

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

org.apache.crunch.MapFn<V,K>

org.apache.crunch.lib.sort.SortFns.TupleKeyFn<V,K>

All Implemented Interfaces:

Serializable

Enclosing class:

SortFns

public static class SortFns.TupleKeyFn<V extends Tuple,K extends Tuple>
extends MapFn<V,K>

Extracts a composite key from a Tuple instance.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TupleKeyFn(int[] indices, TupleFactory tupleFactory)

Method Summary

Modifier and Type	Method and Description
K	map(V input) Maps the given input into an instance of the output type.

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

TupleKeyFn

public TupleKeyFn(int[] indices,
                  TupleFactory tupleFactory)

Method Detail

map

public K map(V input)

Description copied from class: MapFn

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

Specified by:

map in class MapFn<V extends Tuple,K extends Tuple>