Class count
- java.lang.Object
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- org.eclipse.viatra.query.runtime.matchers.aggregators.count
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- All Implemented Interfaces:
IAggregatorFactory
public final class count extends java.lang.Object implements IAggregatorFactory
An aggregator to count the number of matches a pattern has. The return of the aggregator is an non-negative integer number.- Since:
- 1.4
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Constructor Summary
Constructors Constructor Description count()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description BoundAggregator
getAggregatorLogic(java.lang.Class<?> domainClass)
Given type parameters selected fromAggregatorType
annotations, returns a run-time aggregator operator that is bound to the actual types.
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Method Detail
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getAggregatorLogic
public BoundAggregator getAggregatorLogic(java.lang.Class<?> domainClass)
Description copied from interface:IAggregatorFactory
Given type parameters selected fromAggregatorType
annotations, returns a run-time aggregator operator that is bound to the actual types.- Specified by:
getAggregatorLogic
in interfaceIAggregatorFactory
- Parameters:
domainClass
- Java type of the values that are being aggregated- Returns:
- the actual run-time aggregator logic, with type bindings
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