org.apache.pig.builtin
Class DoubleAbs

java.lang.Object
  org.apache.pig.EvalFunc<Double>
      org.apache.pig.builtin.DoubleAbs

public class DoubleAbs
extends EvalFunc<Double>

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

DoubleAbs()

Method Summary

Double	exec(Tuple input) java level API
Schema	outputSchema(Schema input) Report the schema of the output of this UDF.

Methods inherited from class org.apache.pig.EvalFunc

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

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleAbs

public DoubleAbs()

Method Detail

exec

public Double exec(Tuple input)
            throws IOException

java level API

Specified by:

exec in class EvalFunc<Double>

Parameters:

input - expects a single numeric value

Returns:

output returns a single numeric value, absolute value of the argument

Throws:

IOException

outputSchema

public Schema outputSchema(Schema input)

Description copied from class: EvalFunc

Report the schema of the output of this UDF. Pig will make use of this in error checking, optimization, and planning. The schema of input data to this UDF is provided.

Overrides:

outputSchema in class EvalFunc<Double>

Parameters:

input - Schema of the input

Returns:

Schema of the output