Module org.apache.jena.arq

Package org.apache.jena.sparql.pfunction

Class PFuncAssignToSubject

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.PFuncAssignToSubject

All Implemented Interfaces:

PropertyFunction

public abstract class PFuncAssignToSubject
extends PFuncSimple

Common case: take a node (object) and calculate something else, assign it to a variable (subject)

Constructor Summary

Constructors

Constructor	Description
PFuncAssignToSubject()

Method Summary

Modifier and Type	Method	Description
abstract org.apache.jena.graph.Node	calc(org.apache.jena.graph.Node node)
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

build, exec

Methods inherited from class java.lang.Object

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

Constructor Details

PFuncAssignToSubject

public PFuncAssignToSubject()

Method Details

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)

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

calc

public abstract org.apache.jena.graph.Node calc(org.apache.jena.graph.Node node)