org.apache.pig.builtin

Class HiveUDAF.Initial

java.lang.Object

org.apache.pig.EvalFunc<Tuple>

org.apache.pig.builtin.HiveUDAF.Initial

Enclosing class:

HiveUDAF

public static class HiveUDAF.Initial
extends EvalFunc<Tuple>

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
Initial(java.lang.String funcName)
Initial(java.lang.String funcName, java.lang.String params)

Method Summary

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

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, outputSchema, 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

Initial

public Initial(java.lang.String funcName)

Initial

public Initial(java.lang.String funcName,
               java.lang.String params)
        throws java.io.IOException

Throws:

java.io.IOException

Method Detail

exec

public Tuple exec(Tuple input)
           throws java.io.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.

Specified by:

exec in class EvalFunc<Tuple>

Parameters:

input - the Tuple to be processed.

Returns:

result, of type T.

Throws:

java.io.IOException