Class AbstractMemorylessAggregationOperator<Domain, AggregateResult>

java.lang.Object

tools.refinery.interpreter.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 Object
implements IMultisetAggregationOperator<Domain, AggregateResult, AggregateResult>

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

Since:

1.4

Constructor Summary

Constructors

Constructor	Description
AbstractMemorylessAggregationOperator()

Method Summary

Modifier and Type	Method	Description
AggregateResult	clone(AggregateResult original)	Clones the given accumulator (with all its internal contents).
AggregateResult	getAggregate(AggregateResult result)

Methods inherited from class Object

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

Methods inherited from interface IMultisetAggregationOperator

aggregateStream, combine, contains, createNeutral, getName, getShortDescription, isNeutral, prettyPrint, update

Constructor Details

AbstractMemorylessAggregationOperator

public AbstractMemorylessAggregationOperator()

Method Details

getAggregate

public AggregateResult getAggregate(AggregateResult result)

Specified by:

getAggregate in interface IMultisetAggregationOperator<Domain, AggregateResult, AggregateResult>

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).

clone

public AggregateResult clone(AggregateResult original)

Description copied from interface: IMultisetAggregationOperator

Clones the given accumulator (with all its internal contents).

Specified by:

clone in interface IMultisetAggregationOperator<Domain, AggregateResult, AggregateResult>