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, FederationStrategy, 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 and Description
protected Dataset	dataset
protected FederatedServiceResolver	serviceResolver
protected TripleSource	tripleSource

Constructor Summary

Constructors

Constructor and Description
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)
StrictEvaluationStrategy(TripleSource tripleSource, FederatedServiceResolver serviceResolver)

Method Summary

Modifier and Type	Method and Description
Value	evaluate(And node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(ArbitraryLengthPath alp, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BinaryTupleOperator expr, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BindingSetAssignment bsa, BindingSet bindings)
Value	evaluate(BNodeGenerator node, BindingSet bindings)
Value	evaluate(Bound node, BindingSet bindings)
Value	evaluate(Coalesce node, BindingSet bindings)
Value	evaluate(CompareAll node, BindingSet bindings)
Value	evaluate(CompareAny node, BindingSet bindings)
Value	evaluate(Compare node, BindingSet bindings)
Value	evaluate(Datatype node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(DescribeOperator operator, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Difference difference, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Distinct distinct, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(EmptySet emptySet, BindingSet bindings)
Value	evaluate(Exists node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Extension extension, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(ExternalSet external, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Filter filter, BindingSet bindings)
Value	evaluate(FunctionCall node, BindingSet bindings) Evaluates a function.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Group node, BindingSet bindings)
Value	evaluate(If node, BindingSet bindings)
Value	evaluate(In node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Intersection intersection, BindingSet bindings)
IRI	evaluate(IRIFunction node, BindingSet bindings) Creates a URI from the operand value (a plain literal or a URI).
Value	evaluate(IsBNode node, BindingSet bindings) Determines whether the operand (a variable) contains a BNode.
Value	evaluate(IsLiteral node, BindingSet bindings) Determines whether the operand (a variable) contains a Literal.
Value	evaluate(IsNumeric node, BindingSet bindings) Determines whether the operand (a variable) contains a numeric datatyped literal, i.e.
Value	evaluate(IsResource node, BindingSet bindings) Determines whether the operand (a variable) contains a Resource.
Value	evaluate(IsURI node, BindingSet bindings) Determines whether the operand (a variable) contains a URI.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Join join, BindingSet bindings)
Value	evaluate(Label node, BindingSet bindings)
Value	evaluate(Lang node, BindingSet bindings)
Value	evaluate(LangMatches node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(LeftJoin leftJoin, BindingSet bindings)
Value	evaluate(Like node, BindingSet bindings) Determines whether the two operands match according to the like operator.
Value	evaluate(ListMemberOperator node, BindingSet bindings)
Value	evaluate(LocalName node, BindingSet bindings)
Value	evaluate(MathExpr node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(MultiProjection multiProjection, BindingSet bindings)
Value	evaluate(Namespace node, BindingSet bindings)
Value	evaluate(Not node, BindingSet bindings)
Value	evaluate(Now node, BindingSet bindings)
Value	evaluate(Or node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Order node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Projection projection, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Reduced reduced, BindingSet bindings)
Value	evaluate(Regex node, BindingSet bindings) Determines whether the two operands match according to the regex operator.
Value	evaluate(SameTerm node, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Service service, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Service service, String serviceUri, CloseableIteration<BindingSet,QueryEvaluationException> bindings) Evaluates the tuple expression against the supplied triple source with the specified set of variable bindings as input.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(SingletonSet singletonSet, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Slice slice, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(StatementPattern statementPattern, BindingSet bindings)
Value	evaluate(Str node, BindingSet bindings)
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) Evaluates the tuple expression against the supplied triple source with the specified set of variable bindings as input.
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(UnaryTupleOperator expr, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(Union union, BindingSet bindings)
Value	evaluate(ValueConstant valueConstant, BindingSet bindings)
Value	evaluate(ValueExpr expr, BindingSet bindings) Gets the value of this expression.
Value	evaluate(ValueExprTripleRef node, BindingSet bindings)
Value	evaluate(Var var, BindingSet bindings)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(ZeroLengthPath zlp, BindingSet bindings)
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() Returns the UUID of this object.
protected Value	getVarValue(Var var, BindingSet bindings)
protected ZeroLengthPathIteration	getZeroLengthPathIterator(BindingSet bindings, Var subjectVar, Var objVar, Var contextVar, Value subj, Value obj)
protected boolean	isReducedOrDistinct(QueryModelNode node)
boolean	isTrue(ValueExpr expr, BindingSet bindings) Evaluates the boolean expression on the supplied TripleSource object.
protected boolean	isUnbound(Var var, BindingSet bindings)
TupleExpr	optimize(TupleExpr expr, EvaluationStatistics evaluationStatistics, BindingSet bindings) Execute the QueryOptimizerPipeline on the given TupleExpr to optimize its execution plan.
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.

Methods inherited from class java.lang.Object

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

Field Detail

tripleSource

protected final TripleSource tripleSource

dataset

protected final Dataset dataset

serviceResolver

protected FederatedServiceResolver serviceResolver

Constructor Detail

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 Detail

getUUID

public UUID getUUID()

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

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

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

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(ArbitraryLengthPath alp,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(ZeroLengthPath zlp,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

getZeroLengthPathIterator

protected ZeroLengthPathIteration getZeroLengthPathIterator(BindingSet bindings,
                                                            Var subjectVar,
                                                            Var objVar,
                                                            Var contextVar,
                                                            Value subj,
                                                            Value obj)

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Service service,
                                                                        String serviceUri,
                                                                        CloseableIteration<BindingSet,QueryEvaluationException> bindings)
                                                                 throws QueryEvaluationException

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

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Service service,
                                                                        BindingSet bindings)
                                                                 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

isUnbound

protected boolean isUnbound(Var var,
                            BindingSet bindings)

getVarValue

protected Value getVarValue(Var var,
                            BindingSet bindings)

evaluate

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

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(BindingSetAssignment bsa,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Projection projection,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(MultiProjection multiProjection,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Filter filter,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Slice slice,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Extension extension,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Distinct distinct,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Reduced reduced,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Group node,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Order node,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

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

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Join join,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(LeftJoin leftJoin,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Union union,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Intersection intersection,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(Difference difference,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(SingletonSet singletonSet,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(EmptySet emptySet,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public CloseableIteration<BindingSet,QueryEvaluationException> evaluate(ExternalSet external,
                                                                        BindingSet bindings)
                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(ValueExpr expr,
                      BindingSet bindings)
               throws QueryEvaluationException

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

public Value evaluate(Var var,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(ValueConstant valueConstant,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(BNodeGenerator node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Bound node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Str node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Label node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Lang node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Datatype node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Namespace node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(LocalName node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(IsResource node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

Returns:

true if the operand contains a Resource, false otherwise.

Throws:

QueryEvaluationException

evaluate

public Value evaluate(IsURI node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

Returns:

true if the operand contains a URI, false otherwise.

Throws:

QueryEvaluationException

evaluate

public Value evaluate(IsBNode node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

Returns:

true if the operand contains a BNode, false otherwise.

Throws:

QueryEvaluationException

evaluate

public Value evaluate(IsLiteral node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

Returns:

true if the operand contains a Literal, false otherwise.

Throws:

QueryEvaluationException

evaluate

public Value evaluate(IsNumeric node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

Returns:

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

Throws:

QueryEvaluationException

evaluate

public IRI evaluate(IRIFunction node,
                    BindingSet bindings)
             throws QueryEvaluationException

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

public Value evaluate(Regex node,
                      BindingSet bindings)
               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

public Value evaluate(LangMatches node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Like node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

public Value evaluate(FunctionCall node,
                      BindingSet bindings)
               throws QueryEvaluationException

Evaluates a function.

Throws:

QueryEvaluationException

evaluate

public Value evaluate(And node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Or node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Not node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Now node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(SameTerm node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Coalesce node,
                      BindingSet bindings)
               throws ValueExprEvaluationException

Throws:

ValueExprEvaluationException

evaluate

public Value evaluate(Compare node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(MathExpr node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(If node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(In node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(ListMemberOperator node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(CompareAny node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(CompareAll node,
                      BindingSet bindings)
               throws QueryEvaluationException

Throws:

QueryEvaluationException

evaluate

public Value evaluate(Exists node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

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

public Value evaluate(ValueExprTripleRef node,
                      BindingSet bindings)
               throws QueryEvaluationException

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

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.