de.fuberlin.wiwiss.d2rq.jena

Class D2RQQueryHandler

java.lang.Object

com.hp.hpl.jena.graph.query.SimpleQueryHandler

de.fuberlin.wiwiss.d2rq.jena.D2RQQueryHandler

All Implemented Interfaces:

com.hp.hpl.jena.graph.query.QueryHandler

public class D2RQQueryHandler
extends com.hp.hpl.jena.graph.query.SimpleQueryHandler

An implementation of Jena's QueryHandler interface that answers BGP queries on behalf of a GraphD2RQ. This is here for Jena compatibility, and is not involved in answering SPARQL queries through ARQ. It uses the QueryEngineD2RQ to answer BGP queries and wraps it into the expected interface.

Author:

Richard Cyganiak

Field Summary

Fields inherited from class com.hp.hpl.jena.graph.query.SimpleQueryHandler

graph

Constructor Summary

Constructors

Constructor and Description
D2RQQueryHandler(GraphD2RQ graph)

Method Summary

Methods

Modifier and Type	Method and Description
com.hp.hpl.jena.graph.query.BindingQueryPlan	prepareBindings(com.hp.hpl.jena.graph.query.Query q, Node[] variables)
com.hp.hpl.jena.graph.query.TreeQueryPlan	prepareTree(Graph pattern)

Methods inherited from class com.hp.hpl.jena.graph.query.SimpleQueryHandler

containsNode, objectsFor, objectsFor, patternStage, predicatesFor, predicatesFor, subjectsFor, subjectsFor

Methods inherited from class java.lang.Object

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

Constructor Detail

D2RQQueryHandler

public D2RQQueryHandler(GraphD2RQ graph)

Method Detail

prepareTree

public com.hp.hpl.jena.graph.query.TreeQueryPlan prepareTree(Graph pattern)

Specified by:

prepareTree in interface com.hp.hpl.jena.graph.query.QueryHandler

Overrides:

prepareTree in class com.hp.hpl.jena.graph.query.SimpleQueryHandler

prepareBindings

public com.hp.hpl.jena.graph.query.BindingQueryPlan prepareBindings(com.hp.hpl.jena.graph.query.Query q,
                                                           Node[] variables)

Specified by:

prepareBindings in interface com.hp.hpl.jena.graph.query.QueryHandler

Overrides:

prepareBindings in class com.hp.hpl.jena.graph.query.SimpleQueryHandler