Oracle® Fusion Middleware .NET API Reference for Oracle Coherence
12c (12.2.1.4.0)
E90869-02
Create an instance of GroupAggregator based on a specified extractor and an IEntryAggregator and a result evaluation filter.

Namespace: Tangosol.Util.Aggregator
Assembly: Coherence (in Coherence.dll) Version: 12.2.1.4014 (12.2.1.4014)

Syntax

C#
public static GroupAggregator CreateInstance(
	IValueExtractor extractor,
	IEntryAggregator aggregator,
	IFilter filter
)

Parameters

extractor
Type: Tangosol.Util..::..IValueExtractor
An IValueExtractor that will be used to split a set of IInvocableDictionary entries into distinct groups.
aggregator
Type: Tangosol.Net.Cache..::..IEntryAggregator
An underlying IEntryAggregator.
filter
Type: Tangosol.Util..::..IFilter
An optional IFilter object used to filter out results of individual group aggregation results.

Return Value

An instance of GroupAggregator based on a specified extractor and an IEntryAggregator and a result evaluation filter.

Remarks

If the specified aggregator is an instance of IParallelAwareAggregator, then a parallel-aware instance of the GroupAggregator will be created. Otherwise, the resulting GroupAggregator will not be parallel-aware and could be ill-suited for aggregations run against large partitioned caches.

See Also