org.apache.crunch.fn
Class SDoubleFunction<T>

java.lang.Object
  extended by org.apache.crunch.DoFn<S,T>
      extended by org.apache.crunch.MapFn<T,R>
          extended by org.apache.crunch.fn.SDoubleFunction<T>
All Implemented Interfaces:
Serializable, org.apache.spark.api.java.function.DoubleFunction<T>

public abstract class SDoubleFunction<T>
extends MapFn<T,R>
implements org.apache.spark.api.java.function.DoubleFunction<T>

A Crunch-compatible abstract base class for Spark's DoubleFunction. Subclasses of this class may be used against either Crunch PCollections or Spark RDDs.

See Also:
Serialized Form

Constructor Summary
SDoubleFunction()
           
 
Method Summary
 void cleanup(Emitter<R> emitter)
          Called during the cleanup of the MapReduce job this DoFn is associated with.
 void initialize()
          Initialize this DoFn.
 Double map(T 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
configure, disableDeepCopy, setConfiguration, setContext
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.spark.api.java.function.DoubleFunction
call
 

Constructor Detail

SDoubleFunction

public SDoubleFunction()
Method Detail

map

public Double map(T input)
Description copied from class: MapFn
Maps the given input into an instance of the output type.

Specified by:
map in class MapFn<T,Double>

initialize

public final void initialize()
Description copied from class: DoFn
Initialize this DoFn. This initialization will happen before the actual DoFn.process(Object, Emitter) is triggered. Subclasses may override this method to do appropriate initialization.

Called during the setup of the job instance this DoFn is associated with.

Overrides:
initialize in class DoFn<T,R>

cleanup

public final void cleanup(Emitter<R> emitter)
Description copied from class: DoFn
Called during the cleanup of the MapReduce job this DoFn is associated with. Subclasses may override this method to do appropriate cleanup.

Overrides:
cleanup in class DoFn<T,R>
Parameters:
emitter - The emitter that was used for output


Copyright © 2014 The Apache Software Foundation. All Rights Reserved.