org.apache.pig.piggybank.evaluation.string

Class HashFNV1

java.lang.Object

org.apache.pig.EvalFunc<Long>

org.apache.pig.piggybank.evaluation.string.HashFNV

org.apache.pig.piggybank.evaluation.string.HashFNV1

public class HashFNV1
extends HashFNV

Implementation for HashFNV which takes 1 parameter

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.EvalFunc

EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
HashFNV1()

Method Summary

Methods

Modifier and Type	Method and Description
Long	exec(Tuple input) This callback method must be implemented by all subclasses.

Methods inherited from class org.apache.pig.piggybank.evaluation.string.HashFNV

getArgToFuncMapping, outputSchema

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, 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

HashFNV1

public HashFNV1()

Method Detail

exec

public Long exec(Tuple input)
          throws IOException

Description copied from class: EvalFunc

This callback method must be implemented by all subclasses. This is the method that will be invoked on every Tuple of a given dataset. Since the dataset may be divided up in a variety of ways the programmer should not make assumptions about state that is maintained between invocations of this method.

Overrides:

exec in class HashFNV

Parameters:

input - the Tuple to be processed.

Returns:

result, of type T.

Throws:

IOException