com.bigdata.btree.proc

Class IntegerAggregator

java.lang.Object

com.bigdata.btree.proc.IntegerAggregator

All Implemented Interfaces:

IResultHandler<Integer,Long>

public class IntegerAggregator
extends Object
implements IResultHandler<Integer,Long>

Aggregates the value of an Integer result, making the sum available as a Long integer (to help prevent overflow).

Author:

Bryan Thompson

Constructor Summary

Constructors

Constructor and Description
IntegerAggregator()

Method Summary

Methods

Modifier and Type	Method and Description
void	aggregate(Integer result, Split split) Method is invoked for each result and is responsible for combining the results in whatever manner is meaningful for the procedure.
Long	getResult() Return the aggregated results as an implementation dependent object.

Methods inherited from class java.lang.Object

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

Constructor Detail

IntegerAggregator

public IntegerAggregator()

Method Detail

aggregate

public void aggregate(Integer result,
             Split split)

Description copied from interface: IResultHandler

Method is invoked for each result and is responsible for combining the results in whatever manner is meaningful for the procedure. Implementations of this method MUST be thread-safe since the procedure MAY be applied in parallel when it spans more than one index partition.

Specified by:

aggregate in interface IResultHandler<Integer,Long>

Parameters:

result - The result from applying the procedure to a single index partition.

split - The Split that generated that result.

getResult

public Long getResult()

Description copied from interface: IResultHandler

Return the aggregated results as an implementation dependent object.

Specified by:

getResult in interface IResultHandler<Integer,Long>