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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

SortFns.TupleKeyFn(int[] indices, TupleFactory tupleFactory)

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, disableDeepCopy, getConfiguration, getContext, getCounter, getCounter, getStatus, getTaskAttemptID, increment, increment, increment, increment, initialize, progress, setConfiguration, setContext, setStatus

Methods inherited from class java.lang.Object

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

Constructor Detail

SortFns.TupleKeyFn

public SortFns.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>