Package org.eclipse.rdf4j.federated.algebra

Class EmptyStatementPattern

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.StatementPattern

org.eclipse.rdf4j.federated.algebra.EmptyStatementPattern

All Implemented Interfaces:

Serializable, Cloneable, BoundJoinTupleExpr, EmptyResult, QueryModelNode, TupleExpr, VariableScopeChange

public class EmptyStatementPattern
extends StatementPattern
implements EmptyResult, BoundJoinTupleExpr

EmptyStatementPattern represents a statement that cannot produce any results for the registered endpoints.

Author:

Andreas Schwarte

See Also:

• Serialized Form

Nested Class Summary

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

StatementPattern.Scope

Constructor Summary

Constructors

Constructor	Description
EmptyStatementPattern(StatementPattern node)

Method Summary

Modifier and Type	Method	Description
<X extends Exception> void	visit(QueryModelVisitor<X> visitor)	Visits this node.

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

clone, equals, getAssuredBindingNames, getBindingNames, getContextVar, getIndexName, getObjectVar, getOrder, getPredicateVar, getScope, getSignature, getStatementOrder, getSubjectVar, getSupportedOrders, getVarList, getVars, hashCode, replaceChildNode, setIndexName, setOrder, shouldCacheCardinality, visitChildren

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

getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, isCardinalitySet, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, toString

Methods inherited from class java.lang.Object

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

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

getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString

Constructor Details

EmptyStatementPattern

public EmptyStatementPattern(StatementPattern node)

Method Details

visit

public <X extends Exception> void visit(QueryModelVisitor<X> visitor)
                                 throws X

Description copied from interface: QueryModelNode

Visits this node. The node reports itself to the visitor with the proper runtime type.

Specified by:

visit in interface QueryModelNode

Overrides:

visit in class StatementPattern

Throws:

X