Package org.eclipse.rdf4j.federated.algebra

Class ExclusiveArbitraryLengthPath

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.ArbitraryLengthPath

org.eclipse.rdf4j.federated.algebra.ExclusiveArbitraryLengthPath

All Implemented Interfaces:

Serializable, Cloneable, ExclusiveTupleExpr, ExclusiveTupleExprRenderer, FedXTupleExpr, QueryRef, VariableExpr, QueryModelNode, TupleExpr, VariableScopeChange

public class ExclusiveArbitraryLengthPath
extends ArbitraryLengthPath
implements ExclusiveTupleExprRenderer

An ArbitraryLengthPath node which can be evaluated at a single node.

Author:

Andreas Schwarte

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ExclusiveArbitraryLengthPath(ArbitraryLengthPath path, StatementSource owner, QueryInfo queryInfo)

Method Summary

Modifier and Type	Method	Description
ExclusiveArbitraryLengthPath	clone()	Returns a (deep) clone of this query model node.
List<String>	getFreeVars()
StatementSource	getOwner()
QueryInfo	getQueryInfo()	Retrieve the attached query information of the tuple expression
TupleExpr	toQueryAlgebra(Set<String> varNames, BindingSet bindings)	Returns a SPARQL algebra representation of this expression that can be inserted into a SELECT TupleExpr
String	toQueryString(Set<String> varNames, BindingSet bindings)	Returns a SPARQL string representation of this expression that can be inserted into a SELECT query.

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

equals, getAssuredBindingNames, getBindingNames, getContextVar, getMinLength, getObjectVar, getPathExpression, getScope, getSignature, getSubjectVar, hashCode, replaceChildNode, setContextVar, setMinLength, setObjectVar, setPathExpression, setScope, setSubjectVar, visit, 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, shouldCacheCardinality, toString

Methods inherited from class java.lang.Object

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

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.query.algebra.TupleExpr

getAssuredBindingNames, getBindingNames

Constructor Details

ExclusiveArbitraryLengthPath

public ExclusiveArbitraryLengthPath(ArbitraryLengthPath path,
 StatementSource owner,
 QueryInfo queryInfo)

Method Details

getOwner

public StatementSource getOwner()

Specified by:

getOwner in interface ExclusiveTupleExpr

Returns:

the owner for this expression

clone

public ExclusiveArbitraryLengthPath clone()

Description copied from interface: QueryModelNode

Returns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.

Specified by:

clone in interface QueryModelNode

Specified by:

clone in interface TupleExpr

Overrides:

clone in class ArbitraryLengthPath

Returns:

A deep clone of this query model node.

toQueryString

public String toQueryString(Set<String> varNames,
 BindingSet bindings)

Description copied from interface: ExclusiveTupleExprRenderer

Returns a SPARQL string representation of this expression that can be inserted into a SELECT query.

Implementations are required to create a valid query string for this expression where the given bindings are inserted.

Specified by:

toQueryString in interface ExclusiveTupleExprRenderer

Parameters:

varNames - the set of resulting (unbound) variables from this expression

bindings - the optional input bindings

Returns:

the query string part

toQueryAlgebra

public TupleExpr toQueryAlgebra(Set<String> varNames,
 BindingSet bindings)

Description copied from interface: ExclusiveTupleExprRenderer

Returns a SPARQL algebra representation of this expression that can be inserted into a SELECT TupleExpr

Implementations are required to create a new equivalent expression or clone, where any provided input bindings are inserted. The free variable names after insertion need to be added to the provided set.

Specified by:

toQueryAlgebra in interface ExclusiveTupleExprRenderer

Parameters:

varNames - the set of resulting (unbound) variables from this expression

bindings - the input bindings that need to be inserted

Returns:

the algebra expression

getFreeVars

public List<String> getFreeVars()

Specified by:

getFreeVars in interface VariableExpr

Returns:

a list of free (i.e. unbound) variables in this expression

getQueryInfo

public QueryInfo getQueryInfo()

Description copied from interface: QueryRef

Retrieve the attached query information of the tuple expression

Specified by:

getQueryInfo in interface QueryRef

Returns:

the QueryInfo