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

Class StrictEvaluationStrategy

java.lang.Object

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

All Implemented Interfaces:

EvaluationStrategy, FederatedServiceResolver, FederatedServiceResolverClient, UUIDable

Direct Known Subclasses:

EvaluationStrategyImpl, FederationEvalStrategy, LimitedSizeEvaluationStrategy, SimpleEvaluationStrategy, TupleFunctionEvaluationStrategy

public class StrictEvaluationStrategy
extends Object
implements EvaluationStrategy, FederatedServiceResolverClient, UUIDable

Minimally-conforming SPARQL 1.1 Query Evaluation strategy, to evaluate one TupleExpr on the given TripleSource, optionally using the given Dataset.

Author:

Jeen Broekstra, James Leigh, Arjohn Kampman, David Huynh, Andreas Schwarte

See Also:

• ExtendedEvaluationStrategy

Field Summary

Fields

Modifier and Type	Field	Description
protected final Dataset	dataset
protected FederatedServiceResolver	serviceResolver
protected final TripleSource	tripleSource

Constructor Summary

Constructors

Constructor	Description
StrictEvaluationStrategy(TripleSource tripleSource, FederatedServiceResolver serviceResolver)
StrictEvaluationStrategy(TripleSource tripleSource, Dataset dataset, FederatedServiceResolver serviceResolver)
StrictEvaluationStrategy(TripleSource tripleSource, Dataset dataset, FederatedServiceResolver serviceResolver, long iterationCacheSyncTreshold, EvaluationStatistics evaluationStatistics)
StrictEvaluationStrategy(TripleSource tripleSource, Dataset dataset, FederatedServiceResolver serviceResolver, long iterationCacheSyncTreshold, EvaluationStatistics evaluationStatistics, boolean trackResultSize)

Method Summary

Modifier and Type	Method	Description
Value	evaluate(And node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(ArbitraryLengthPath alp, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BinaryTupleOperator expr, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BindingSetAssignment bsa, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(BNodeGenerator node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Bound node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Coalesce node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(CompareAll node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(CompareAny node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Compare node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Datatype node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(DescribeOperator operator, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Difference difference, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Distinct distinct, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(EmptySet emptySet, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Now node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Exists node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Extension extension, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Filter filter, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(FunctionCall node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Group node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(If node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(In node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Intersection intersection, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
IRI	evaluate(IRIFunction node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(IsBNode node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(IsLiteral node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(IsNumeric node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(IsResource node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(IsURI node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Join join, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Label node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(LangMatches node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Lang node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(LeftJoin leftJoin, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Like node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(ListMemberOperator node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(LocalName node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(MathExpr node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(MultiProjection multiProjection, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Namespace node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Not node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Order node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Or node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Projection projection, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Reduced reduced, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Regex node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(SameTerm node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Service service, String serviceUri, CloseableIteration<BindingSet,QueryEvaluationException> bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Service service, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(SingletonSet singletonSet, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Slice slice, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(StatementPattern statementPattern, BindingSet bindings)
Value	evaluate(Str node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(TripleRef ref, BindingSet bindings)	evaluates a TripleRef node returning bindingsets from the matched Triple nodes in the dataset (or explore standard reification)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(TupleExpr expr, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(UnaryTupleOperator expr, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Union union, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(ValueConstant valueConstant, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(ValueExpr expr, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(ValueExprTripleRef node, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
Value	evaluate(Var var, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(ZeroLengthPath zlp, BindingSet bindings)	Deprecated, for removal: This API element is subject to removal in a future version.
protected long	getLimit(QueryModelNode node)	Returns the limit of the current variable bindings before any further projection.
FederatedService	getService(String serviceUrl)	Retrieve the FederatedService registered for serviceUrl.
UUID	getUUID()	Deprecated, for removal: This API element is subject to removal in a future version.
static Value	getVarValue(Var var, BindingSet bindings)
protected boolean	isReducedOrDistinct(QueryModelNode node)
boolean	isTrue(QueryValueEvaluationStep expr, BindingSet bindings)
boolean	isTrue(ValueExpr expr, BindingSet bindings)	Evaluates the boolean expression on the supplied TripleSource object.
TupleExpr	optimize(TupleExpr expr, EvaluationStatistics evaluationStatistics, BindingSet bindings)	Execute the QueryOptimizerPipeline on the given TupleExpr to optimize its execution plan.
QueryEvaluationStep	precompile(TupleExpr expr)	Prepare a QueryEvaluationStep that tries to do as much work once per query avoiding repeated calls to the same code as much as possible.
QueryEvaluationStep	precompile(TupleExpr expr, QueryEvaluationContext context)
QueryValueEvaluationStep	precompile(ValueExpr expr, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(ArbitraryLengthPath alp, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(BinaryTupleOperator expr, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(BindingSetAssignment node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(Compare node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(DescribeOperator node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Difference node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Distinct node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(EmptySet emptySet, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(Now node, QueryEvaluationContext context)	During the execution of a single query NOW() should always return the same result and is in practical terms a constant during evaluation.
protected QueryEvaluationStep	prepare(Extension node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Filter node, QueryEvaluationContext context)
QueryValueEvaluationStep	prepare(FunctionCall node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Group node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Intersection node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Join node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(LangMatches node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(LeftJoin node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(MathExpr node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(MultiProjection node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(Not node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Order node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Projection node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(QueryRoot node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Reduced node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(Regex node, QueryEvaluationContext context)	Determines whether the two operands match according to the regex operator.
protected QueryValueEvaluationStep	prepare(SameTerm node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Service service, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(SingletonSet singletonSet, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Slice node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(StatementPattern node, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(TripleRef ref, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(UnaryTupleOperator expr, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(Union node, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(ValueConstant valueConstant, QueryEvaluationContext context)
protected QueryValueEvaluationStep	prepare(Var var, QueryEvaluationContext context)
protected QueryEvaluationStep	prepare(ZeroLengthPath zlp, QueryEvaluationContext context)
void	setFederatedServiceResolver(FederatedServiceResolver resolver)	Sets the FederatedServiceResolver to use for this client.
void	setOptimizerPipeline(QueryOptimizerPipeline pipeline)	Set the QueryOptimizerPipeline to use for optimizing any incoming queries.
void	setTrackResultSize(boolean trackResultSize)	Enable or disable results size tracking for the query plan.
void	setTrackTime(boolean trackTime)	Enable or disable time tracking for the query plan.
protected QueryValueEvaluationStep	supplyBinaryValueEvaluation(BinaryValueOperator node, BiFunction<Value,Value,Value> operation, QueryEvaluationContext context)	Supply a QueryValueEvalationStep that will invoke the function (operator passed in).
protected QueryValueEvaluationStep	supplyUnaryValueEvaluation(UnaryValueOperator node, Function<Value,Value> operation, QueryEvaluationContext context)	Return a QueryEvaluationStep that applies constant propegation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.EvaluationStrategy

makeQueue, makeSet

Field Details

tripleSource

protected final TripleSource tripleSource

dataset

protected final Dataset dataset

serviceResolver

protected FederatedServiceResolver serviceResolver

Constructor Details

StrictEvaluationStrategy

public StrictEvaluationStrategy(TripleSource tripleSource,
 FederatedServiceResolver serviceResolver)

StrictEvaluationStrategy

public StrictEvaluationStrategy(TripleSource tripleSource,
 Dataset dataset,
 FederatedServiceResolver serviceResolver)

StrictEvaluationStrategy

public StrictEvaluationStrategy(TripleSource tripleSource,
 Dataset dataset,
 FederatedServiceResolver serviceResolver,
 long iterationCacheSyncTreshold,
 EvaluationStatistics evaluationStatistics)

StrictEvaluationStrategy

public StrictEvaluationStrategy(TripleSource tripleSource,
 Dataset dataset,
 FederatedServiceResolver serviceResolver,
 long iterationCacheSyncTreshold,
 EvaluationStatistics evaluationStatistics,
 boolean trackResultSize)

Method Details

getUUID

@Deprecated(forRemoval=true,
            since="4.0.0")
public UUID getUUID()

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from interface: UUIDable

Returns the UUID of this object.

Specified by:

getUUID in interface UUIDable

Returns:

a non-null UUID.

setFederatedServiceResolver

public void setFederatedServiceResolver(FederatedServiceResolver resolver)

Description copied from interface: FederatedServiceResolverClient

Sets the FederatedServiceResolver to use for this client.

Specified by:

setFederatedServiceResolver in interface FederatedServiceResolverClient

Parameters:

resolver - The resolver to use.

getService

public FederatedService getService(String serviceUrl)
                            throws QueryEvaluationException

Description copied from interface: EvaluationStrategy

Retrieve the FederatedService registered for serviceUrl. If there is no service registered for serviceUrl, a new SPARQLFederatedService is created and registered.

Specified by:

getService in interface EvaluationStrategy

Specified by:

getService in interface FederatedServiceResolver

Parameters:

serviceUrl - URL of the service.

Returns:

the FederatedService registered for the serviceUrl.

Throws:

QueryEvaluationException - If there was an exception generated while retrieving the service.

See Also:

• FederatedServiceResolver.getService(java.lang.String)

setOptimizerPipeline

public void setOptimizerPipeline(QueryOptimizerPipeline pipeline)

Description copied from interface: EvaluationStrategy

Set the QueryOptimizerPipeline to use for optimizing any incoming queries.

Specified by:

setOptimizerPipeline in interface EvaluationStrategy

Parameters:

pipeline - the QueryOptimizerPipeline.

See Also:

• EvaluationStrategy.optimize(TupleExpr, EvaluationStatistics, BindingSet)

optimize

public TupleExpr optimize(TupleExpr expr,
 EvaluationStatistics evaluationStatistics,
 BindingSet bindings)

Execute the QueryOptimizerPipeline on the given TupleExpr to optimize its execution plan.

Specified by:

optimize in interface EvaluationStrategy

Parameters:

expr - the TupleExpr to optimize.

evaluationStatistics - this param is ignored!

bindings - a-priori bindings supplied for the query, which can potentially be inlined.

Returns:

the optimized TupleExpr.

Since:

3.0

See Also:

• setOptimizerPipeline(QueryOptimizerPipeline)

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(TupleExpr expr,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from interface: EvaluationStrategy

Evaluates the tuple expression against the supplied triple source with the specified set of variable bindings as input.

Specified by:

evaluate in interface EvaluationStrategy

Parameters:

expr - The Tuple Expression to evaluate

bindings - The variables bindings to use for evaluating the expression, if applicable.

Returns:

A closeable iterator over the variable binding sets that match the tuple expression.

Throws:

QueryEvaluationException

precompile

public QueryEvaluationStep precompile(TupleExpr expr)

Description copied from interface: EvaluationStrategy

Prepare a QueryEvaluationStep that tries to do as much work once per query avoiding repeated calls to the same code as much as possible. This depends on java invoke dynamic for performance.

Specified by:

precompile in interface EvaluationStrategy

Parameters:

expr - that is to be evaluated later

Returns:

a QueryEvaluationStep that may avoid doing repeating the same work over and over.

precompile

public QueryEvaluationStep precompile(TupleExpr expr,
 QueryEvaluationContext context)

Specified by:

precompile in interface EvaluationStrategy

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(ArbitraryLengthPath alp,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(ArbitraryLengthPath alp,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(ZeroLengthPath zlp,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(ZeroLengthPath zlp,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Service service,
 String serviceUri,
 CloseableIteration<BindingSet,QueryEvaluationException> bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from interface: EvaluationStrategy

Evaluates the tuple expression against the supplied triple source with the specified set of variable bindings as input.

Specified by:

evaluate in interface EvaluationStrategy

Parameters:

service - The Service Expression to evaluate

serviceUri - TODO

bindings - The variables bindings iterator to use for evaluating the expression, if applicable.

Returns:

A closeable iterator over all of variable binding sets that match the tuple expression.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Service service,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Difference node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Group node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Intersection node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Join node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(LeftJoin node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(MultiProjection node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Projection node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(QueryRoot node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(StatementPattern node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Union node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Slice node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Extension node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Service service,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Filter node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Order node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(BindingSetAssignment node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(DescribeOperator node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Distinct node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(Reduced node,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(DescribeOperator operator,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(StatementPattern statementPattern,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

getVarValue

public static Value getVarValue(Var var,
 BindingSet bindings)

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(UnaryTupleOperator expr,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(UnaryTupleOperator expr,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(BindingSetAssignment bsa,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Projection projection,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(MultiProjection multiProjection,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Filter filter,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Slice slice,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Extension extension,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Distinct distinct,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Reduced reduced,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Group node,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Order node,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(BinaryTupleOperator expr,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(BinaryTupleOperator expr,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Join join,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(LeftJoin leftJoin,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Union union,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Intersection intersection,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Difference difference,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(SingletonSet singletonSet,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(SingletonSet singletonSet,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(EmptySet emptySet,
 BindingSet bindings)
                                                                 throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryEvaluationStep prepare(EmptySet emptySet,
 QueryEvaluationContext context)
                               throws QueryEvaluationException

Throws:

QueryEvaluationException

precompile

public QueryValueEvaluationStep precompile(ValueExpr expr,
 QueryEvaluationContext context)
                                    throws QueryEvaluationException

Specified by:

precompile in interface EvaluationStrategy

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(ValueExpr expr,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from interface: EvaluationStrategy

Gets the value of this expression.

Specified by:

evaluate in interface EvaluationStrategy

bindings - The variables bindings to use for evaluating the expression, if applicable.

Returns:

The Value that this expression evaluates to, or null if the expression could not be evaluated.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Var var,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(Var var,
 QueryEvaluationContext context)
                                    throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(ValueConstant valueConstant,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(ValueConstant valueConstant,
 QueryEvaluationContext context)
                                    throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(BNodeGenerator node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Bound node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Str node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Label node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Lang node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Datatype node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Namespace node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(LocalName node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(IsResource node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the operand (a variable) contains a Resource.

Returns:

true if the operand contains a Resource, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(IsURI node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the operand (a variable) contains a URI.

Returns:

true if the operand contains a URI, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(IsBNode node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the operand (a variable) contains a BNode.

Returns:

true if the operand contains a BNode, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(IsLiteral node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the operand (a variable) contains a Literal.

Returns:

true if the operand contains a Literal, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(IsNumeric node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the operand (a variable) contains a numeric datatyped literal, i.e. a literal with datatype CoreDatatype.XSD:float, CoreDatatype.XSD:double, CoreDatatype.XSD:decimal, or a derived datatype of CoreDatatype.XSD:decimal.

Returns:

true if the operand contains a numeric datatyped literal, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public IRI evaluate(IRIFunction node,
 BindingSet bindings)
             throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Creates a URI from the operand value (a plain literal or a URI).

Parameters:

node - represents an invocation of the SPARQL IRI function

bindings - used to generate the value that the URI is based on

Returns:

a URI generated from the given arguments

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Regex node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the two operands match according to the regex operator.

Returns:

true if the operands match according to the regex operator, false otherwise.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(Regex node,
 QueryEvaluationContext context)
                                    throws QueryEvaluationException

Determines whether the two operands match according to the regex operator.

Returns:

true if the operands match according to the regex operator, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(LangMatches node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(LangMatches node,
 QueryEvaluationContext context)

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Like node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Determines whether the two operands match according to the like operator. The operator is defined as a string comparison with the possible use of an asterisk (*) at the end and/or the start of the second operand to indicate substring matching.

Returns:

true if the operands match according to the like operator, false otherwise.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(FunctionCall node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Evaluates a function.

Throws:

QueryEvaluationException

prepare

public QueryValueEvaluationStep prepare(FunctionCall node,
 QueryEvaluationContext context)
                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(And node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Or node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Not node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(Not node,
 QueryEvaluationContext context)

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Now node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(Now node,
 QueryEvaluationContext context)

During the execution of a single query NOW() should always return the same result and is in practical terms a constant during evaluation.

Parameters:

node - that represent the NOW() function

context - that holds the shared now() of the query invocation

Returns:

a constant value evaluation step

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(SameTerm node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(SameTerm node,
 QueryEvaluationContext context)

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Coalesce node,
 BindingSet bindings)
               throws ValueExprEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

ValueExprEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Compare node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(Compare node,
 QueryEvaluationContext context)

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(MathExpr node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

prepare

protected QueryValueEvaluationStep prepare(MathExpr node,
 QueryEvaluationContext context)

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(If node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(In node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(ListMemberOperator node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(CompareAny node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(CompareAll node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(Exists node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

isTrue

public boolean isTrue(ValueExpr expr,
 BindingSet bindings)
               throws QueryEvaluationException

Description copied from interface: EvaluationStrategy

Evaluates the boolean expression on the supplied TripleSource object.

Specified by:

isTrue in interface EvaluationStrategy

bindings - The variables bindings to use for evaluating the expression, if applicable.

Returns:

The result of the evaluation.

Throws:

ValueExprEvaluationException - If the value expression could not be evaluated, for example when comparing two incompatible operands. When thrown, the result of the boolean expression is neither true nor false , but unknown.

QueryEvaluationException

isTrue

public boolean isTrue(QueryValueEvaluationStep expr,
 BindingSet bindings)
               throws QueryEvaluationException

Specified by:

isTrue in interface EvaluationStrategy

Throws:

QueryEvaluationException

isReducedOrDistinct

protected boolean isReducedOrDistinct(QueryModelNode node)

getLimit

protected long getLimit(QueryModelNode node)

Returns the limit of the current variable bindings before any further projection.

evaluate

@Deprecated(forRemoval=true)
public Value evaluate(ValueExprTripleRef node,
 BindingSet bindings)
               throws QueryEvaluationException

Deprecated, for removal: This API element is subject to removal in a future version.

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(TripleRef ref,
 BindingSet bindings)

evaluates a TripleRef node returning bindingsets from the matched Triple nodes in the dataset (or explore standard reification)

Parameters:

ref - to evaluate

bindings - with the solutions

Returns:

iteration over the solutions

prepare

protected QueryEvaluationStep prepare(TripleRef ref,
 QueryEvaluationContext context)

setTrackResultSize

public void setTrackResultSize(boolean trackResultSize)

Description copied from interface: EvaluationStrategy

Enable or disable results size tracking for the query plan. Useful to determine which parts of a query plan generated the most data.

Specified by:

setTrackResultSize in interface EvaluationStrategy

Parameters:

trackResultSize - true to enable tracking.

setTrackTime

public void setTrackTime(boolean trackTime)

Description copied from interface: EvaluationStrategy

Enable or disable time tracking for the query plan. Useful to determine which parts of a query plan take the most time to evaluate.

Specified by:

setTrackTime in interface EvaluationStrategy

Parameters:

trackTime - true to enable tracking.

supplyBinaryValueEvaluation

protected QueryValueEvaluationStep supplyBinaryValueEvaluation(BinaryValueOperator node,
 BiFunction<Value,Value,Value> operation,
 QueryEvaluationContext context)

Supply a QueryValueEvalationStep that will invoke the function (operator passed in). It will try to optimise constant argument to be called only once per query run,

Parameters:

node - the node to evaluate

operation - the function that wraps the operator.

context - in which the query is running.

Returns:

a potential constant evaluation step.

supplyUnaryValueEvaluation

protected QueryValueEvaluationStep supplyUnaryValueEvaluation(UnaryValueOperator node,
 Function<Value,Value> operation,
 QueryEvaluationContext context)

Return a QueryEvaluationStep that applies constant propegation.

Parameters:

node - that will be evaluated/prepared

operation - the task to be done

context - in which the evaluation takes place

Returns:

a potentially constant step