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org.apache.crunch.lib.sort
Class SortFns.SingleKeyFn<V extends Tuple,K>

java.lang.Object
  org.apache.crunch.DoFn<S,T>
      org.apache.crunch.MapFn<V,K>
          org.apache.crunch.lib.sort.SortFns.SingleKeyFn<V,K>

All Implemented Interfaces:

Serializable

Enclosing class:

SortFns

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

Extracts a single indexed key from a Tuple instance.

See Also:

Serialized Form

Constructor Summary

SortFns.SingleKeyFn(int index)

Method Summary

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, initialize, setContext

Methods inherited from class java.lang.Object

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

Constructor Detail

SortFns.SingleKeyFn

public SortFns.SingleKeyFn(int index)

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>