org.eclipse.viatra.query.runtime.matchers.psystem.aggregations

Class AbstractMemorylessAggregationOperator<Domain,AggregateResult>

java.lang.Object

org.eclipse.viatra.query.runtime.matchers.psystem.aggregations.AbstractMultisetAggregationOperator<Domain,AggregateResult,AggregateResult>

org.eclipse.viatra.query.runtime.matchers.psystem.aggregations.AbstractMemorylessAggregationOperator<Domain,AggregateResult>

All Implemented Interfaces:

IMultisetAggregationOperator<Domain,AggregateResult,AggregateResult>

Direct Known Subclasses:

DoubleSumOperator, IntegerSumOperator, LongSumOperator

public abstract class AbstractMemorylessAggregationOperator<Domain,AggregateResult>
extends AbstractMultisetAggregationOperator<Domain,AggregateResult,AggregateResult>

An aggregation operator that does not store interim results beyond the final aggregated value.

Since:

1.4

Constructor Summary

Constructors

Constructor and Description
AbstractMemorylessAggregationOperator()

Method Summary

Modifier and Type	Method and Description
AggregateResult	getAggregate(AggregateResult result)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.viatra.query.runtime.matchers.psystem.aggregations.IMultisetAggregationOperator

createNeutral, getName, getShortDescription, isNeutral, update

Constructor Detail

AbstractMemorylessAggregationOperator

public AbstractMemorylessAggregationOperator()

Method Detail

getAggregate

public AggregateResult getAggregate(AggregateResult result)

Returns:

the aggregate result obtained from the given intermediate result. May be null to indicate that the current multiset cannot be aggregated (e.g. 0 elements have no minimum).