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org.apache.crunch.util
Class Protos.ExtractKeyFn<M extends com.google.protobuf.Message,K>

java.lang.Object
  org.apache.crunch.DoFn<S,T>
      org.apache.crunch.MapFn<M,K>
          org.apache.crunch.util.Protos.ExtractKeyFn<M,K>

All Implemented Interfaces:

Serializable

Enclosing class:

Protos

public static class Protos.ExtractKeyFn<M extends com.google.protobuf.Message,K>
extends MapFn<M,K>

See Also:

Serialized Form

Constructor Summary

Protos.ExtractKeyFn(String fieldName)

Method Summary

K	map(M 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, setConfigurationForTest, setContext

Methods inherited from class java.lang.Object

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

Constructor Detail

Protos.ExtractKeyFn

public Protos.ExtractKeyFn(String fieldName)

Method Detail

map

public K map(M input)

Description copied from class: MapFn

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

Specified by:

map in class MapFn<M extends com.google.protobuf.Message,K>