Oracle Fusion Middleware C++ API Reference for Oracle Coherence: AbstractFloat64Aggregator Class Reference

Detailed Description

aggregator

Map

All the extracted Number objects will be treated as float64_t values and the result of the aggregator is a Float64. If the set of entries is empty, a NULL result is returned.

Author:

djl 2008.05.09

Public Types

typedef spec::Handle

Handle

AbstractFloat64Aggregator Handle definition.

typedef spec::View

View

AbstractFloat64Aggregator View definition.

typedef spec::Holder

Holder

AbstractFloat64Aggregator Holder definition.

Protected Member Functions

AbstractFloat64Aggregator (String::View vsMethod)

Construct an AbstractFloat64Aggregator 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 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

Protected Attributes

int32_t

m_count

The count of processed entries.

float64_t

m_dflResult

The running result value.

Constructor & Destructor Documentation

AbstractFloat64Aggregator ( String::View vsMethod ) [protected]

Construct an AbstractFloat64Aggregator 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