org.openrdf.query.algebra

Class Service

java.lang.Object

org.openrdf.query.algebra.QueryModelNodeBase

org.openrdf.query.algebra.UnaryTupleOperator

org.openrdf.query.algebra.Service

All Implemented Interfaces:

Cloneable, QueryModelNode, TupleExpr

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

Field Summary

Fields inherited from class org.openrdf.query.algebra.UnaryTupleOperator

arg

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and 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	getBaseURI()
Map<String,String>	getPrefixDeclarations()
String	getQueryString(Set<String> projectionVars) Returns the 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) Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this 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) Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor<X>) that does nothing.

Methods inherited from class org.openrdf.query.algebra.UnaryTupleOperator

getArg, getAssuredBindingNames, getBindingNames, setArg

Methods inherited from class org.openrdf.query.algebra.QueryModelNodeBase

getParentNode, getSignature, nullEquals, replaceNodeInList, replaceWith, setParentNode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.query.algebra.QueryModelNode

getParentNode, getSignature, replaceWith, setParentNode, toString

Constructor Detail

Service

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

Method Detail

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.

getQueryString

public String getQueryString(Set<String> projectionVars)

Returns the query string using the provided projection vars. Two cases are considered: a) projectionVars available => SELECT query The variables are inserted into the preparedSelectQueryString in the SELECT clause. b) projectionVars empty => ASK query return preparedAskQueryString

Parameters:

projectionVars -

Returns:

the 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 extends Exception

Description copied from interface: QueryModelNode

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

Throws:

X extends Exception

visitChildren

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

Description copied from class: QueryModelNodeBase

Dummy implementation of QueryModelNode.visitChildren(org.openrdf.query.algebra.QueryModelVisitor<X>) that does nothing. Subclasses should override this method when they have child nodes.

Specified by:

visitChildren in interface QueryModelNode

Overrides:

visitChildren in class UnaryTupleOperator

Throws:

X extends Exception

replaceChildNode

public void replaceChildNode(QueryModelNode current,
                    QueryModelNode replacement)

Description copied from class: QueryModelNodeBase

Default implementation of QueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode) that throws an IllegalArgumentException indicating that current is not a child node of this 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.