org.apache.pig.builtin
Class LongSum.Final

java.lang.Object
  org.apache.pig.EvalFunc<Long>
      org.apache.pig.builtin.LongSum.Final

Enclosing class:

LongSum

public static class LongSum.Final
extends EvalFunc<Long>

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

LongSum.Final()

Method Summary

Long	exec(Tuple input) This callback method must be implemented by all subclasses.

Methods inherited from class org.apache.pig.EvalFunc

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

Methods inherited from class java.lang.Object

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

Constructor Detail

LongSum.Final

public LongSum.Final()

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.

Specified by:

exec in class EvalFunc<Long>

Parameters:

input - the Tuple to be processed.

Returns:

result, of type T.

Throws:

IOException