org.openrdf.sail.federation.optimizers
Class EvaluationStatistics

java.lang.Object
  org.openrdf.sail.federation.optimizers.EvaluationStatistics

public class EvaluationStatistics
extends Object

Supplies various query model statistics to the query engine/optimizer.

Author:

Arjohn Kampman, James Leigh

Nested Class Summary

protected static class

EvaluationStatistics.CardinalityCalculator

Field Summary

protected EvaluationStatistics.CardinalityCalculator

cc

Constructor Summary

EvaluationStatistics()

Method Summary

protected EvaluationStatistics.CardinalityCalculator	createCardinalityCalculator()
double	getCardinality(TupleExpr expr)

Methods inherited from class java.lang.Object

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

Field Detail

cc

protected EvaluationStatistics.CardinalityCalculator cc

Constructor Detail

EvaluationStatistics

public EvaluationStatistics()

Method Detail

getCardinality

public double getCardinality(TupleExpr expr)

createCardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator createCardinalityCalculator()