org.eclipse.rdf4j.federated.optimizer

Class GenericInfoOptimizer

java.lang.Object

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

org.eclipse.rdf4j.federated.optimizer.GenericInfoOptimizer

All Implemented Interfaces:

FedXOptimizer, QueryModelVisitor<OptimizationException>

public class GenericInfoOptimizer
extends AbstractQueryModelVisitor<OptimizationException>
implements FedXOptimizer

Generic optimizer Tasks: - Collect information (hasUnion, hasFilter, hasService) - Collect all statements in a list (for source selection), do not collect SERVICE expressions - Collect all Join arguments and group them in the NJoin structure for easier optimization (flatten)

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	hasFilter
protected boolean	hasService
protected boolean	hasUnion
protected long	limit
protected QueryInfo	queryInfo
protected List<StatementPattern>	stmts

Constructor Summary

Constructors

Constructor and Description
GenericInfoOptimizer(QueryInfo queryInfo)

Method Summary

Modifier and Type	Method and Description
long	getLimit()
List<StatementPattern>	getStatements()
boolean	hasFilter()
boolean	hasLimit()
boolean	hasService()
boolean	hasUnion()
void	meet(Filter filter)
void	meet(Join node)
void	meet(LeftJoin node)
void	meet(Projection node)
void	meet(Service service)
void	meet(Slice node)
void	meet(StatementPattern node)
void	meet(Union union)
void	optimize(TupleExpr tupleExpr) Optimize the provided tuple expression

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

Methods inherited from class java.lang.Object

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

Field Detail

hasFilter

protected boolean hasFilter

hasUnion

protected boolean hasUnion

hasService

protected boolean hasService

limit

protected long limit

stmts

protected List<StatementPattern> stmts

queryInfo

protected final QueryInfo queryInfo

Constructor Detail

GenericInfoOptimizer

public GenericInfoOptimizer(QueryInfo queryInfo)

Method Detail

hasFilter

public boolean hasFilter()

hasUnion

public boolean hasUnion()

getStatements

public List<StatementPattern> getStatements()

hasLimit

public boolean hasLimit()

getLimit

public long getLimit()

optimize

public void optimize(TupleExpr tupleExpr)

Description copied from interface: FedXOptimizer

Optimize the provided tuple expression

Specified by:

optimize in interface FedXOptimizer

meet

public void meet(Union union)

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

meet

public void meet(Filter filter)

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

meet

public void meet(Service service)

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

meet

public void meet(Join node)

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

meet

public void meet(LeftJoin node)
          throws OptimizationException

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

Throws:

OptimizationException

meet

public void meet(StatementPattern node)

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

meet

public void meet(Projection node)
          throws OptimizationException

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

Throws:

OptimizationException

meet

public void meet(Slice node)
          throws OptimizationException

Specified by:

meet in interface QueryModelVisitor<OptimizationException>

Overrides:

meet in class AbstractQueryModelVisitor<OptimizationException>

Throws:

OptimizationException

hasService

public boolean hasService()