com.tangosol.util.aggregator
Class ComparableMax

java.lang.Object
  com.tangosol.util.Base
      com.tangosol.util.BitHelper
          com.tangosol.util.ExternalizableHelper
              com.tangosol.util.aggregator.AbstractAggregator
                  com.tangosol.util.aggregator.AbstractComparableAggregator
                      com.tangosol.util.aggregator.ComparableMax

All Implemented Interfaces:

ExternalizableLite, PortableObject, InvocableMap.EntryAggregator, InvocableMap.ParallelAwareAggregator, Serializable

public class ComparableMax
extends AbstractComparableAggregator

Calculates a maximum among Comparable values extracted from a set of entries in a Map. This aggregator is most commonly used with values of type String or Date.

Since:

Coherence 3.2

Author:

gg 2006.02.13

Field Summary

Fields inherited from class com.tangosol.util.aggregator.AbstractComparableAggregator

m_count, m_oResult

Fields inherited from class com.tangosol.util.aggregator.AbstractAggregator

m_fParallel

Constructor Summary

ComparableMax()
Default constructor (necessary for the ExternalizableLite interface).

ComparableMax(String sMethod)
Construct a ComparableMax aggregator.

ComparableMax(ValueExtractor extractor)
Construct a ComparableMax aggregator.

Method Summary

protected void

process(Object o, boolean fFinal) Incorporate one aggregatable value into the result.

Methods inherited from class com.tangosol.util.aggregator.AbstractComparableAggregator

finalizeResult, init

Methods inherited from class com.tangosol.util.aggregator.AbstractAggregator

aggregate, aggregateResults, equals, getParallelAggregator, getValueExtractor, hashCode, readExternal, readExternal, toString, writeExternal, writeExternal

Methods inherited from class com.tangosol.util.BitHelper

countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, toBitString, toBitString, toBitString

Constructor Detail

ComparableMax

public ComparableMax()

Default constructor (necessary for the ExternalizableLite interface).

ComparableMax

public ComparableMax(ValueExtractor extractor)

Construct a ComparableMax aggregator.

Parameters:

extractor - the extractor that provides a value in the form of any object that implements Comparable interface

ComparableMax

public ComparableMax(String sMethod)

Construct a ComparableMax aggregator.

Parameters:

sMethod - the name of the method that returns a value in the form of any object that implements Comparable interface

Method Detail

process

protected void process(Object o,
                       boolean fFinal)

Incorporate one aggregatable value into the result.

If the fFinal parameter is true, the given object is a partial result (returned by an individual parallel aggregator) that should be incorporated into the final result; otherwise, the object is a value extracted from an InvocableMap.Entry.

Specified by:

process in class AbstractAggregator

Parameters:

o - the value to incorporate into the aggregated result

fFinal - true to indicate that the given object is a partial result returned by a parallel aggregator