org.eclipse.rdf4j.federated.algebra

Class StatementSourcePattern

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.StatementPattern

org.eclipse.rdf4j.federated.algebra.FedXStatementPattern

org.eclipse.rdf4j.federated.algebra.StatementSourcePattern

All Implemented Interfaces:

Serializable, Cloneable, BoundJoinTupleExpr, FedXTupleExpr, FilterTuple, QueryRef, StatementTupleExpr, VariableExpr, GraphPatternGroupable, QueryModelNode, TupleExpr

public class StatementSourcePattern
extends FedXStatementPattern

Represents statements that can produce results at a some particular endpoints, the statement sources.

Author:

Andreas Schwarte

See Also:

StatementSource, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.rdf4j.query.algebra.StatementPattern

StatementPattern.Scope

Field Summary

Fields

Modifier and Type	Field and Description
protected FederationContext	federationContext
protected boolean	usePreparedQuery

Fields inherited from class org.eclipse.rdf4j.federated.algebra.FedXStatementPattern

boundFilters, filterExpr, freeVars, id, queryInfo, statementSources, upperLimit

Constructor Summary

Constructors

Constructor and Description
StatementSourcePattern(StatementPattern node, QueryInfo queryInfo)

Method Summary

Modifier and Type	Method and Description
void	addStatementSource(StatementSource statementSource)
CloseableIteration<BindingSet,QueryEvaluationException>	evaluate(BindingSet bindings) Evaluate this expression using the provided bindings
protected CloseableIteration<BindingSet,QueryEvaluationException>	handleStatementSourcePatternCheck(BindingSet bindings)

Methods inherited from class org.eclipse.rdf4j.federated.algebra.FedXStatementPattern

addBoundFilter, addFilterExpr, getFilterExpr, getFreeVarCount, getFreeVars, getId, getQueryInfo, getSourceCount, getStatementSources, getUpperLimit, hasFilter, hasFreeVarsFor, initFreeVars, setUpperLimit, visit, visitChildren

Methods inherited from class org.eclipse.rdf4j.query.algebra.StatementPattern

clone, equals, getAssuredBindingNames, getBindingNames, getContextVar, getObjectVar, getPredicateVar, getScope, getSignature, getSubjectVar, getVarList, getVars, hashCode, replaceChildNode, setContextVar, setObjectVar, setPredicateVar, setScope, setSubjectVar

Methods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

getParentNode, isGraphPatternGroup, nullEquals, replaceNodeInList, replaceWith, setGraphPatternGroup, setParentNode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

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

clone, getAssuredBindingNames, getBindingNames

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

equals, getParentNode, getSignature, replaceChildNode, replaceWith, setParentNode, toString

Field Detail

usePreparedQuery

protected boolean usePreparedQuery

federationContext

protected final FederationContext federationContext

Constructor Detail

StatementSourcePattern

public StatementSourcePattern(StatementPattern node,
                              QueryInfo queryInfo)

Method Detail

addStatementSource

public void addStatementSource(StatementSource statementSource)

evaluate

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

Description copied from interface: StatementTupleExpr

Evaluate this expression using the provided bindings

Returns:

the result iteration

Throws:

QueryEvaluationException

handleStatementSourcePatternCheck

protected CloseableIteration<BindingSet,QueryEvaluationException> handleStatementSourcePatternCheck(BindingSet bindings)
                                                                                             throws RepositoryException,
                                                                                                    MalformedQueryException,
                                                                                                    QueryEvaluationException

Throws:

RepositoryException

MalformedQueryException

QueryEvaluationException