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com.tangosol.util.aggregator
Class DoubleMax

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.aggregator.AbstractAggregator
com.tangosol.util.aggregator.AbstractDoubleAggregator
com.tangosol.util.aggregator.DoubleMax

All Implemented Interfaces:

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

public class DoubleMax

extends AbstractDoubleAggregator

Calculates a maximum of numeric values extracted from a set of entries in a Map. All the extracted Number objects will be treated as Java double values.

Since:

Coherence 3.1

Author:

gg 2005.09.05

Field Summary

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

m_count, m_dflResult

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

m_fParallel

Constructor Summary

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

DoubleMax(java.lang.String sMethod)
Construct a DoubleMax aggregator.

DoubleMax(ValueExtractor extractor)
Construct a DoubleMax aggregator.

Method Summary

protected void	init(boolean fFinal) Initialize the aggregation result.
protected void	process(java.lang.Object o, boolean fFinal) Incorporate one aggregatable value into the result.

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

finalizeResult

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

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

Methods inherited from class com.tangosol.util.BitHelper

countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString

Constructor Detail

DoubleMax

public DoubleMax()

Default constructor (necessary for the ExternalizableLite interface).

DoubleMax

public DoubleMax(ValueExtractor extractor)

Construct a DoubleMax aggregator.

Parameters:

extractor - the extractor that provides a value in the form of any Java object that is a Number

DoubleMax

public DoubleMax(java.lang.String sMethod)

Construct a DoubleMax aggregator.

Parameters:

sMethod - the name of the method that returns a value in the form of any Java object that is a Number

Method Detail

init

protected void init(boolean fFinal)

Initialize the aggregation result.

Overrides:

init in class AbstractDoubleAggregator

Parameters:

fFinal - true is passed if the aggregation process that is being initialized must produce a final aggregation result; this will only be false if a parallel approach is being used and the initial (partial) aggregation process is being initialized

process

protected void process(java.lang.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

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