datafu.pig.bags
Class NullToEmptyBag

java.lang.Object
  org.apache.pig.EvalFunc<org.apache.pig.data.DataBag>
      datafu.pig.bags.NullToEmptyBag

public class NullToEmptyBag
extends org.apache.pig.EvalFunc<org.apache.pig.data.DataBag>

Returns an empty bag if the input is null; otherwise, returns the input bag unchanged.

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

NullToEmptyBag()

Method Summary

org.apache.pig.data.DataBag	exec(org.apache.pig.data.Tuple tuple)
org.apache.pig.impl.logicalLayer.schema.Schema	outputSchema(org.apache.pig.impl.logicalLayer.schema.Schema input)

Methods inherited from class org.apache.pig.EvalFunc

finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, isAsynchronous, progress, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn

Methods inherited from class java.lang.Object

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

Constructor Detail

NullToEmptyBag

public NullToEmptyBag()

Method Detail

exec

public org.apache.pig.data.DataBag exec(org.apache.pig.data.Tuple tuple)
                                 throws java.io.IOException

Specified by:

exec in class org.apache.pig.EvalFunc<org.apache.pig.data.DataBag>

Throws:

java.io.IOException

outputSchema

public org.apache.pig.impl.logicalLayer.schema.Schema outputSchema(org.apache.pig.impl.logicalLayer.schema.Schema input)

Overrides:

outputSchema in class org.apache.pig.EvalFunc<org.apache.pig.data.DataBag>