Oracle Fusion Middleware C++ API Reference for Oracle Coherence
12c (12.1.2)
E26041-01

Float64Average Class Reference

#include <coherence/util/aggregator/Float64Average.hpp>

Inherits AbstractFloat64Aggregator.

List of all members.

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Detailed Description

Calculates an average for values of any numberic type extracted from a set of entries in a Map.

All the extracted Number objects will be treated as float64_t values. If the set of entries is empty, a NULL result is returned.

Author:

djl 2008.05.09

Public Types
typedef spec::Handle	Handle
	Float64Average Handle definition.
typedef spec::View	View
	Float64Average View definition.
typedef spec::Holder	Holder
	Float64Average Holder definition.
Protected Member Functions
	Float64Average ()
	Default constructor (necessary for the PortableObject interface).
	Float64Average (ValueExtractor::View vExtractor)
	Construct a Float64Average aggregator.
	Float64Average (String::View vsMethod)
	Construct an Float64Average that will aggregate values extracted from a set of InvocableMap::Entry objects.
virtual void	init (bool fFinal)
	Initialize the aggregation result. 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
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. 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
virtual Object::Holder	finalizeResult (bool fFinal)
	Obtain the result of the aggregation. If the fFinal parameter is true, the returned object must be the final result of the aggregation; otherwise, the returned object will be treated as a partial result that should be incorporated into the final result. Parameters: fFinal  true to indicate that the final result of the aggregation process should be returned; this will only be false if a parallel approach is being used Returns: the result of the aggregation process

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Constructor & Destructor Documentation

Float64Average

(

ValueExtractor::View

vExtractor

)

[protected]

Construct a Float64Average aggregator.

Parameters:

vExtractor

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

Float64Average

(

String::View

vsMethod

)

[protected]

Construct an Float64Average 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

Since:

Coherence 12.1.2

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The documentation for this class was generated from the following file:

• coherence/util/aggregator/Float64Average.hpp

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