Package org.apache.jena.sparql.pfunction

Class PropertyFunctionBase

java.lang.Object

org.apache.jena.sparql.pfunction.PropertyFunctionBase

All Implemented Interfaces:

PropertyFunction

Direct Known Subclasses:

PropertyFunctionEval

public abstract class PropertyFunctionBase
extends java.lang.Object
implements PropertyFunction

Basic property function handler that calls the implementation subclass one binding at a time

Method Summary

Modifier and Type	Method	Description
void	build(PropFuncArg argSubject, Node predicate, PropFuncArg argObject, ExecutionContext execCxt)	Called during query plan construction immediately after the construction of the property function instance.
abstract QueryIterator	exec(Binding binding, PropFuncArg argSubject, Node predicate, PropFuncArg argObject, ExecutionContext execCxt)
QueryIterator	exec(QueryIterator input, PropFuncArg argSubject, Node predicate, PropFuncArg argObject, ExecutionContext execCxt)	Create an iterator of bindings for the given inputs

Methods inherited from class java.lang.Object

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

Method Detail

build

public void build(PropFuncArg argSubject,
                  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

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

exec

public QueryIterator exec(QueryIterator input,
                          PropFuncArg argSubject,
                          Node predicate,
                          PropFuncArg argObject,
                          ExecutionContext execCxt)

Description copied from interface: PropertyFunction

Create an iterator of bindings for the given inputs

Specified by:

exec in interface PropertyFunction

Parameters:

input - QueryIterator from the previous stage

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 - The execution context

Returns:

QueryIterator

exec

public abstract QueryIterator exec(Binding binding,
                                   PropFuncArg argSubject,
                                   Node predicate,
                                   PropFuncArg argObject,
                                   ExecutionContext execCxt)