org.apache.pig.scripting.jruby

Class JrubyAlgebraicEvalFunc.Final<T>

java.lang.Object

org.apache.pig.EvalFunc<T>

org.apache.pig.scripting.jruby.JrubyAlgebraicEvalFunc.AlgebraicFunctionWrapper<T>

org.apache.pig.scripting.jruby.JrubyAlgebraicEvalFunc.Final<T>

Direct Known Subclasses:

JrubyAlgebraicEvalFunc.BagJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.ChararrayJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.DataByteArrayJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.DoubleJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.FloatJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.IntegerJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.LongJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.MapJrubyAlgebraicEvalFunc.Final, JrubyAlgebraicEvalFunc.TupleJrubyAlgebraicEvalFunc.Final

Enclosing class:

JrubyAlgebraicEvalFunc<T>

public static class JrubyAlgebraicEvalFunc.Final<T>
extends JrubyAlgebraicEvalFunc.AlgebraicFunctionWrapper<T>

This class invokes the final method on the given Ruby class. It passes along the DataBag contained in the Tuple it is given, and the raw result.

Nested Class Summary

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

EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.scripting.jruby.JrubyAlgebraicEvalFunc.AlgebraicFunctionWrapper

isInitialized, receiver, stage

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
Final()
Final(String fileName, String functionName)

Method Summary

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

Methods inherited from class org.apache.pig.scripting.jruby.JrubyAlgebraicEvalFunc.AlgebraicFunctionWrapper

getFileName, getFunctionName, getReceiver, getStage, initialize, isInitialized

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

Final

public Final()

Final

public Final(String fileName,
             String functionName)

Method Detail

exec

public T 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.

Specified by:

exec in class JrubyAlgebraicEvalFunc.AlgebraicFunctionWrapper<T>

Parameters:

input - the Tuple to be processed.

Returns:

result, of type T.

Throws:

IOException