C++ API Reference for Oracle® Coherence Community Edition: ComparableMax Class Reference

Detailed Description

Map

This aggregator is most commonly used with objects that implement Comparable such as String; a Comparator can also be supplied to perform the comparisons.

Author:

djl/pp 2008.05.12

Public Types

typedef spec::Handle

Handle

ComparableMax Handle definition.

typedef spec::View

View

ComparableMax View definition.

typedef spec::Holder

Holder

ComparableMax Holder definition.

Protected Member Functions

ComparableMax ()

Default constructor (necessary for the PortableObject interface).

ComparableMax (ValueExtractor::View vExtractor, Comparator::View vComparator=NULL)

Construct a ComparableMax aggregator.

ComparableMax (String::View vsMethod, Comparator::View vComparator=NULL)

Construct a ComparableMax that will aggregate values extracted from a set of InvocableMap::Entry objects.

virtual void

process (Object::View v, bool 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 coherence::util::InvocableMap::Entry.

This implementation throws an UnsupportedOperationException.

Parameters:

	vO	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

Constructor & Destructor Documentation

ComparableMax	(	ValueExtractor::View	vExtractor,
		Comparator::View	vComparator = `NULL`
	)			`[protected]`

Construct a ComparableMax aggregator.

Parameters:

	vExtractor	the extractor that provides an object to be compared
	vComparator	the comparator used to compare the extracted object, if NULL then the extracted object must implement Comparable

ComparableMax	(	String::View	vsMethod,
		Comparator::View	vComparator = `NULL`
	)			`[protected]`

Construct a ComparableMax that will aggregate values extracted from a set of InvocableMap::Entry objects.

Parameters:

	vsMethod	the name of the method that could be invoked via reflection and that returns values to aggregate; this parameter can also be a dot-delimited sequence of method names which would result in an aggregator based on the ChainedExtractor that is based on an array of corresponding ReflectionExtractor objects
	vComparator	the comparator used to compare the extracted object, if NULL then the extracted object must implement Comparable

Since:: Coherence 12.1.2