Package org.eclipse.rdf4j.query.algebra.evaluation.impl

Class QueryModelNormalizer

java.lang.Object

org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor<RuntimeException>

org.eclipse.rdf4j.query.algebra.evaluation.impl.QueryModelNormalizer

All Implemented Interfaces:

QueryOptimizer, QueryModelVisitor<RuntimeException>

public class QueryModelNormalizer
extends AbstractQueryModelVisitor<RuntimeException>
implements QueryOptimizer

A query optimizer that (partially) normalizes query models to a canonical form. Note: this implementation does not yet cover all query node types.

Author:

Arjohn Kampman

Constructor Summary

Constructors

Constructor	Description
QueryModelNormalizer()

Method Summary

Modifier and Type	Method	Description
void	meet(And and)
void	meet(Difference difference)
void	meet(Filter node)
void	meet(Intersection intersection)
void	meet(Join join)
void	meet(LeftJoin leftJoin)
void	meet(Or or)
void	meet(Union union)
protected void	meetUnaryTupleOperator(UnaryTupleOperator node)	Method called by all meet methods with a UnaryTupleOperator node as argument.
void	optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)

Methods inherited from class org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor

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, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryTupleOperator, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetNAryValueOperator, meetNode, meetOther, meetSubQueryValueOperator, meetUnaryValueOperator, meetUpdateExpr

Methods inherited from class java.lang.Object

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

Constructor Details

QueryModelNormalizer

public QueryModelNormalizer()

Method Details

optimize

public void optimize(TupleExpr tupleExpr,
 Dataset dataset,
 BindingSet bindings)

Specified by:

optimize in interface QueryOptimizer

meet

public void meet(Join join)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(LeftJoin leftJoin)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(Union union)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(Difference difference)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(Intersection intersection)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meetUnaryTupleOperator

protected void meetUnaryTupleOperator(UnaryTupleOperator node)

Description copied from class: AbstractQueryModelVisitor

Method called by all meet methods with a UnaryTupleOperator node as argument. Forwards the call to AbstractQueryModelVisitor.meetNode(org.eclipse.rdf4j.query.algebra.QueryModelNode) by default.

Overrides:

meetUnaryTupleOperator in class AbstractQueryModelVisitor<RuntimeException>

Parameters:

node - The node that is being visited.

meet

public void meet(Filter node)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(Or or)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>

meet

public void meet(And and)

Specified by:

meet in interface QueryModelVisitor<RuntimeException>

Overrides:

meet in class AbstractQueryModelVisitor<RuntimeException>