Package org.eclipse.rdf4j.query.algebra

Class Service

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.UnaryTupleOperator

org.eclipse.rdf4j.query.algebra.Service

All Implemented Interfaces:

Serializable, Cloneable, QueryModelNode, TupleExpr, VariableScopeChange

public class Service
extends UnaryTupleOperator

The SERVICE keyword as defined in SERVICE definition. The service expression is evaluated at the specified service URI. If the service reference is a variable, a value for this variable must be available at evaluation time (e.g. from earlier computations).

Author:

Andreas Schwarte

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator

arg

Constructor Summary

Constructors

Constructor	Description
Service(Var serviceRef, TupleExpr serviceExpr, String serviceExpressionString, Map<String,String> prefixDeclarations, String baseURI, boolean silent)

Method Summary

Modifier and Type	Method	Description
Service	clone()	Returns a (deep) clone of this query model node.
boolean	equals(Object other)	Returns true if this query model node and its children are recursively equal to o and its children.
String	getAskQueryString()	Returns an ASK query string using no projection vars.
String	getBaseURI()
Map<String,String>	getPrefixDeclarations()
String	getSelectQueryString(Set<String> projectionVars)	Returns a SELECT query string using the provided projection vars.
TupleExpr	getServiceExpr()
String	getServiceExpressionString()
Var	getServiceRef()
Set<String>	getServiceVars()
int	hashCode()
boolean	isSilent()
void	replaceChildNode(QueryModelNode current, QueryModelNode replacement)	Replaces one of the child nodes with a new node.
void	setBaseURI(String baseURI)
void	setExpressionString(String serviceExpressionString)	The SERVICE expression, either complete or just the expression e.g.
void	setPrefixDeclarations(Map<String,String> prefixDeclarations)
void	setServiceRef(Var serviceRef)
<X extends Exception> void	visit(QueryModelVisitor<X> visitor)	Visits this node.
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor)	Visits the children of this node.

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

getArg, getAssuredBindingNames, getBindingNames, getOrder, getSupportedOrders, setArg, setOrder

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

getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, 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.query.algebra.QueryModelNode

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

Constructor Details

Service

public Service(Var serviceRef,
 TupleExpr serviceExpr,
 String serviceExpressionString,
 Map<String,String> prefixDeclarations,
 String baseURI,
 boolean silent)

Method Details

getServiceRef

public Var getServiceRef()

getServiceExpr

public TupleExpr getServiceExpr()

setServiceRef

public void setServiceRef(Var serviceRef)

isSilent

public boolean isSilent()

Returns:

Returns the silent.

getPrefixDeclarations

public Map<String,String> getPrefixDeclarations()

Returns:

Returns the prefixDeclarations.

setPrefixDeclarations

public void setPrefixDeclarations(Map<String,String> prefixDeclarations)

Parameters:

prefixDeclarations - The prefixDeclarations to set.

setExpressionString

public void setExpressionString(String serviceExpressionString)

The SERVICE expression, either complete or just the expression e.g. "SERVICE { ... }" becomes " ... "

Parameters:

serviceExpressionString - the inner expression as SPARQL String representation

getServiceExpressionString

public String getServiceExpressionString()

Returns:

Returns the serviceExpressionString.

getAskQueryString

public String getAskQueryString()

Returns an ASK query string using no projection vars.

Returns:

an ASK query string

getSelectQueryString

public String getSelectQueryString(Set<String> projectionVars)

Returns a SELECT query string using the provided projection vars. The variables are inserted into the preparedSelectQueryString in the SELECT clause.

Parameters:

projectionVars -

Returns:

SELECT query string, utilizing the given projection variables

getServiceVars

public Set<String> getServiceVars()

Returns:

Returns the serviceVars.

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.

Throws:

X

visitChildren

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

Description copied from interface: QueryModelNode

Visits the children of this node. The node calls QueryModelNode.visit(QueryModelVisitor) on all of its child nodes.

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class UnaryTupleOperator

Throws:

X

replaceChildNode

public void replaceChildNode(QueryModelNode current,
 QueryModelNode replacement)

Description copied from interface: QueryModelNode

Replaces one of the child nodes with a new node.

Specified by:

replaceChildNode in interface QueryModelNode

Overrides:

replaceChildNode in class UnaryTupleOperator

Parameters:

current - The current child node.

replacement - The new child node.

equals

public boolean equals(Object other)

Description copied from interface: QueryModelNode

Returns true if this query model node and its children are recursively equal to o and its children.

Specified by:

equals in interface QueryModelNode

Overrides:

equals in class UnaryTupleOperator

hashCode

public int hashCode()

Overrides:

hashCode in class UnaryTupleOperator

clone

public Service 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 UnaryTupleOperator

Returns:

A deep clone of this query model node.

setBaseURI

public void setBaseURI(String baseURI)

Parameters:

baseURI - The baseURI to set.

getBaseURI

public String getBaseURI()

Returns:

Returns the baseURI.