Package tools.refinery.interpreter.localsearch.planner.cost.impl

Class IndexerBasedConstraintCostFunction

java.lang.Object

tools.refinery.interpreter.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

tools.refinery.interpreter.localsearch.planner.cost.impl.IndexerBasedConstraintCostFunction

All Implemented Interfaces:

ICostFunction

Direct Known Subclasses:

HybridMatcherConstraintCostFunction

public class IndexerBasedConstraintCostFunction
extends StatisticsBasedConstraintCostFunction

Cost function which calculates cost based on the cardinality of items in the runtime model, provided by the base indexer

Since:

1.4

Field Summary

Fields inherited from class tools.refinery.interpreter.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

DEFAULT_COST, EVAL_UNWIND_EXTENSION_FACTOR, INVERSE_NAVIGATION_PENALTY_DEFAULT, INVERSE_NAVIGATION_PENALTY_GENERIC, MAX_COST

Constructor Summary

Constructors

Constructor	Description
IndexerBasedConstraintCostFunction()
IndexerBasedConstraintCostFunction(double inverseNavigationPenalty)

Method Summary

Modifier and Type	Method	Description
Optional<Long>	projectionSize(IConstraintEvaluationContext input, IInputKey supplierKey, TupleMask groupMask, Accuracy requiredAccuracy)	Override this to provide custom statistics on edge/node counts.

Methods inherited from class tools.refinery.interpreter.localsearch.planner.cost.impl.StatisticsBasedConstraintCostFunction

_calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, _calculateCost, apply, bucketSize, calculateBinaryCost, calculateBinaryExtendCost, calculateCost, calculateUnaryConstraintCost, countTuples, navigatesThroughFunctionalDependency, navigatesThroughFunctionalDependency, navigatesThroughFunctionalDependencyInverse

Methods inherited from class java.lang.Object

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

Constructor Details

IndexerBasedConstraintCostFunction

public IndexerBasedConstraintCostFunction()

IndexerBasedConstraintCostFunction

public IndexerBasedConstraintCostFunction(double inverseNavigationPenalty)

Parameters:

inverseNavigationPenalty -

Since:

2.1

Method Details

projectionSize

public Optional<Long> projectionSize(IConstraintEvaluationContext input,
 IInputKey supplierKey,
 TupleMask groupMask,
 Accuracy requiredAccuracy)

Description copied from class: StatisticsBasedConstraintCostFunction

Override this to provide custom statistics on edge/node counts. New implementors shall implement this instead of StatisticsBasedConstraintCostFunction.countTuples(IConstraintEvaluationContext, IInputKey)

Overrides:

projectionSize in class StatisticsBasedConstraintCostFunction