Class ConstantOptimizer

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.optimizer.ConstantOptimizer

All Implemented Interfaces:

QueryOptimizer

Direct Known Subclasses:

ConstantOptimizer

public class ConstantOptimizer
extends Object
implements QueryOptimizer

A query optimizer that optimizes constant value expressions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ConstantOptimizer.ConstantVisitor
private static class	ConstantOptimizer.VarNameCollector

Field Summary

Fields

Modifier and Type	Field	Description
private static final org.slf4j.Logger	logger
private final EvaluationStrategy	strategy

Constructor Summary

Constructors

Constructor	Description
ConstantOptimizer(EvaluationStrategy strategy)

Method Summary

Modifier and Type	Method	Description
void	optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)	Applies generally applicable optimizations to the supplied query: variable assignments are inlined.

Methods inherited from class Object

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

Field Details

logger

private static final org.slf4j.Logger logger

strategy

private final EvaluationStrategy strategy

Constructor Details

ConstantOptimizer

public ConstantOptimizer(EvaluationStrategy strategy)

Method Details

optimize

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

Applies generally applicable optimizations to the supplied query: variable assignments are inlined.

Specified by:

optimize in interface QueryOptimizer