org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl

Class HybridMatcherConstraintCostFunction

java.lang.Object

org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.IndexerBasedConstraintCostFunction

org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.HybridMatcherConstraintCostFunction

All Implemented Interfaces:

ICostFunction

public class HybridMatcherConstraintCostFunction
extends IndexerBasedConstraintCostFunction

This cost function is intended to be used on hybrid configuration, with the strict restriction than any non-flattened positive pattern call is executed with Rete engine. This implementation provides the exact number of matches by invoking the result provider for the called pattern.

Field Summary

Fields inherited from class org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

DEFAULT_COST, MAX_COST

Constructor Summary

Constructors

Constructor and Description
HybridMatcherConstraintCostFunction()

Method Summary

Modifier and Type	Method and Description
protected double	_calculateCost(PositivePatternCall patternCall, IConstraintEvaluationContext input)

Methods inherited from class org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.IndexerBasedConstraintCostFunction

countTuples

Methods inherited from class org.eclipse.viatra.query.runtime.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

_calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, apply, calculateBinaryExtendCost, calculateCost, calculateUnaryConstraintCost

Methods inherited from class java.lang.Object

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

Constructor Detail

HybridMatcherConstraintCostFunction

public HybridMatcherConstraintCostFunction()

Method Detail

_calculateCost

protected double _calculateCost(PositivePatternCall patternCall,
                                IConstraintEvaluationContext input)

Overrides:

_calculateCost in class StatisticsBasedConstraintCostFunction