Package org.eclipse.rdf4j.federated.algebra

Interface StatementTupleExpr

All Superinterfaces:

Cloneable, FedXTupleExpr, QueryModelNode, QueryRef, Serializable, TupleExpr, VariableExpr

All Known Implementing Classes:

CheckStatementPattern, ExclusiveGroup, ExclusiveStatement, FedXStatementPattern, StatementSourcePattern

public interface StatementTupleExpr
extends FedXTupleExpr

Interface for any expression that can be evaluated

Author:

Andreas Schwarte

See Also:

• StatementSourcePattern
• ExclusiveStatement
• ExclusiveGroup

Method Summary

Modifier and Type	Method	Description
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BindingSet bindings)	Evaluate this expression using the provided bindings
String	getId()
List<StatementSource>	getStatementSources()
boolean	hasFreeVarsFor(BindingSet binding)	returns true iff this statement has free variables in the presence of the specified binding set

Methods inherited from interface org.eclipse.rdf4j.federated.algebra.FedXTupleExpr

getFreeVarCount

Methods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode

equals, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, replaceChildNode, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString, visit, visitChildren

Methods inherited from interface org.eclipse.rdf4j.federated.algebra.QueryRef

getQueryInfo

Methods inherited from interface org.eclipse.rdf4j.query.algebra.TupleExpr

clone, getAssuredBindingNames, getBindingNames

Methods inherited from interface org.eclipse.rdf4j.federated.algebra.VariableExpr

getFreeVars

Method Details

getId

String getId()

Returns:

the id of this expr

getStatementSources

List<StatementSource> getStatementSources()

Returns:

a list of sources that are relevant for evaluation of this expression

hasFreeVarsFor

boolean hasFreeVarsFor(BindingSet binding)

returns true iff this statement has free variables in the presence of the specified binding set

Parameters:

binding -

Returns:

whether the statement has free vars

evaluate

CloseableIteration<BindingSet,QueryEvaluationException> evaluate(BindingSet bindings)
                                                          throws QueryEvaluationException

Evaluate this expression using the provided bindings

Parameters:

bindings -

Returns:

the result iteration

Throws:

QueryEvaluationException