org.openrdf.query.algebra.evaluation.impl
Class EvaluationStatistics.CardinalityCalculator

java.lang.Object
  org.openrdf.query.algebra.helpers.QueryModelVisitorBase<RuntimeException>
      org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics.CardinalityCalculator

All Implemented Interfaces:

QueryModelVisitor<RuntimeException>

Direct Known Subclasses:

MemoryStoreConnection.MemEvaluationStatistics.MemCardinalityCalculator

Enclosing class:

EvaluationStatistics

protected static class EvaluationStatistics.CardinalityCalculator
extends QueryModelVisitorBase<RuntimeException>

Field Summary

protected double

cardinality

Constructor Summary

protected

EvaluationStatistics.CardinalityCalculator()

Method Summary

protected int	countConstantVars(Iterable<Var> vars)
double	getCardinality()
protected double	getCardinality(StatementPattern sp)
void	meet(EmptySet node)
void	meet(Join node)
void	meet(LeftJoin node)
void	meet(SingletonSet node)
void	meet(StatementPattern sp)
protected void	meetBinaryTupleOperator(BinaryTupleOperator node) Method called by all meet methods with a BinaryTupleOperator node as argument.
protected void	meetNode(QueryModelNode node) Method called by all of the other meet methods that are not overridden in subclasses.
protected void	meetUnaryTupleOperator(UnaryTupleOperator node) Method called by all meet methods with a UnaryTupleOperator node as argument.

Methods inherited from class org.openrdf.query.algebra.helpers.QueryModelVisitorBase

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetOther, meetSubQueryValueOperator, meetUnaryValueOperator

Methods inherited from class java.lang.Object

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

Field Detail

cardinality

protected double cardinality

Constructor Detail

EvaluationStatistics.CardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator()

Method Detail

getCardinality

public double getCardinality()

meet

public void meet(EmptySet node)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class QueryModelVisitorBase<RuntimeException>

meet

public void meet(SingletonSet node)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class QueryModelVisitorBase<RuntimeException>

meet

public void meet(StatementPattern sp)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class QueryModelVisitorBase<RuntimeException>

getCardinality

protected double getCardinality(StatementPattern sp)

countConstantVars

protected int countConstantVars(Iterable<Var> vars)

meet

public void meet(Join node)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class QueryModelVisitorBase<RuntimeException>

meet

public void meet(LeftJoin node)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class QueryModelVisitorBase<RuntimeException>

meetBinaryTupleOperator

protected void meetBinaryTupleOperator(BinaryTupleOperator node)

Description copied from class: QueryModelVisitorBase

Method called by all meet methods with a BinaryTupleOperator node as argument. Forwards the call to #meetTupleExpr by default.

Overrides:

meetBinaryTupleOperator in class QueryModelVisitorBase<RuntimeException>

Parameters:

node - The node that is being visited.

meetUnaryTupleOperator

protected void meetUnaryTupleOperator(UnaryTupleOperator node)

Description copied from class: QueryModelVisitorBase

Method called by all meet methods with a UnaryTupleOperator node as argument. Forwards the call to #meetTupleExpr by default.

Overrides:

meetUnaryTupleOperator in class QueryModelVisitorBase<RuntimeException>

Parameters:

node - The node that is being visited.

meetNode

protected void meetNode(QueryModelNode node)

Description copied from class: QueryModelVisitorBase

Method called by all of the other meet methods that are not overridden in subclasses. This method can be overridden in subclasses to define default behaviour when visiting nodes. The default behaviour of this method is to visit the node's children.

Overrides:

meetNode in class QueryModelVisitorBase<RuntimeException>

Parameters:

node - The node that is being visited.