Module org.apache.jena.arq

Package org.apache.jena.sparql.pfunction.library

Class str

java.lang.Object

org.apache.jena.sparql.pfunction.PropertyFunctionBase

org.apache.jena.sparql.pfunction.PropertyFunctionEval

org.apache.jena.sparql.pfunction.PFuncSimple

org.apache.jena.sparql.pfunction.library.str

All Implemented Interfaces:

PropertyFunction

public class str
extends PFuncSimple

Property function to turn an RDF term (but not a blank node) into a string

      ?x :str "foo"@en
      

Constructor Summary

Constructors

Constructor	Description
str()

Method Summary

Modifier and Type	Method	Description
void	build(PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)	Called during query plan construction immediately after the construction of the property function instance.
QueryIterator	execEvaluated(Binding binding, org.apache.jena.graph.Node subject, org.apache.jena.graph.Node predicate, org.apache.jena.graph.Node object, ExecutionContext execCxt)

Methods inherited from class org.apache.jena.sparql.pfunction.PFuncSimple

execEvaluated

Methods inherited from class org.apache.jena.sparql.pfunction.PropertyFunctionEval

exec

Methods inherited from class org.apache.jena.sparql.pfunction.PropertyFunctionBase

exec

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

str

public str()

Method Details

build

public void build(PropFuncArg argSubject,
 org.apache.jena.graph.Node predicate,
 PropFuncArg argObject,
 ExecutionContext execCxt)

Description copied from interface: PropertyFunction

Called during query plan construction immediately after the construction of the property function instance.

Specified by:

build in interface PropertyFunction

Overrides:

build in class PropertyFunctionBase

Parameters:

argSubject - The parsed argument(s) in the subject position

predicate - The extension URI (as a Node).

argObject - The parsed argument(s) in the object position

execCxt - Execution context

execEvaluated

public QueryIterator execEvaluated(Binding binding,
 org.apache.jena.graph.Node subject,
 org.apache.jena.graph.Node predicate,
 org.apache.jena.graph.Node object,
 ExecutionContext execCxt)

Specified by:

execEvaluated in class PFuncSimple

Parameters:

binding - Current solution from previous query stage

subject - Node in subject slot, after substitution if a bound variable in this binding

predicate - This predicate

object - Node in object slot, after substitution if a bound variable in this binding

execCxt - Execution context

Returns:

QueryIterator