StatementTupleExpr (Eclipse RDF4J 5.0.3)

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:

Method Summary

Modifier and Type

Method

Description

CloseableIteration<BindingSet>

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, getOrder, getSupportedOrders, setOrder

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> evaluate(BindingSet bindings) throws QueryEvaluationException
  
  Evaluate this expression using the provided bindings
  
  Parameters:
  
  bindings -
  
  Returns:
  
  the result iteration
  
  Throws:
  
  QueryEvaluationException