Package edu.cornell.mannlib.vitro.webapp.rdfservice.impl.virtuoso

Class RDFServiceVirtuoso

java.lang.Object

edu.cornell.mannlib.vitro.webapp.rdfservice.impl.RDFServiceImpl

edu.cornell.mannlib.vitro.webapp.rdfservice.impl.sparql.RDFServiceSparql

edu.cornell.mannlib.vitro.webapp.rdfservice.impl.virtuoso.RDFServiceVirtuoso

All Implemented Interfaces:

RDFService

public class RDFServiceVirtuoso
extends RDFServiceSparql

For now, at least, it is just like an RDFServiceSparql except: A username and password are required. These should refer to a Virtuoso user that posesses the SPARQL_UPDATE role. The endpoint URI and the update endpoint URI are derived from the base URI. You provide: http://localhost:8890 endpoint is: http://localhost:8890/sparql/ update is: http://localhost:8890/DAV/home/username/rdf_sink/vitro_update A change in the syntax of an UPDATE request: "INSERT DATA" becomes "INSERT". This fixes a problem with inserting blank nodes. The HTTP request is equipped with the username and password, to answer a challenge for basic authentication. Allow for the nonNegativeInteger bug when checking to see whether a graph has changed.

Nested Class Summary

Nested classes/interfaces inherited from interface edu.cornell.mannlib.vitro.webapp.rdfservice.RDFService

RDFService.ModelSerializationFormat, RDFService.ResultFormat, RDFService.SPARQLQueryType

Field Summary

Fields inherited from class edu.cornell.mannlib.vitro.webapp.rdfservice.impl.sparql.RDFServiceSparql

httpClient, readEndpointURI, rebuildGraphURICache, updateEndpointURI

Fields inherited from class edu.cornell.mannlib.vitro.webapp.rdfservice.impl.RDFServiceImpl

defaultWriteGraphURI, registeredJenaListeners, registeredListeners

Constructor Summary

Constructors

Constructor	Description
RDFServiceVirtuoso(String baseURI, String username, String password)

Method Summary

Modifier and Type	Method	Description
protected void	executeUpdate(String updateString)
protected org.apache.http.auth.UsernamePasswordCredentials	getCredentials()
boolean	isEquivalentGraph(String graphURI, InputStream serializedGraph, RDFService.ModelSerializationFormat serializationFormat)	Virtuoso has a bug which it shares with TDB: if given a literal of type xsd:nonNegativeInteger, it stores a literal of type xsd:integer.
boolean	isEquivalentGraph(String graphURI, org.apache.jena.rdf.model.Model graph)	TDB has a bug: if given a literal of type xsd:nonNegativeInteger, it stores a literal of type xsd:integer.

Methods inherited from class edu.cornell.mannlib.vitro.webapp.rdfservice.impl.sparql.RDFServiceSparql

changeSetUpdate, close, getContext, getDefaultWriteGraphURI, getGraphMetadata, getGraphURIs, getReadEndpointURI, getUpdateEndpointURI, isPreconditionSatisfied, manufactureChangeSet, preferPreciseOptionals, registerListener, serializeAll, serializeGraph, sparqlAskQuery, sparqlConstructQuery, sparqlConstructQuery, sparqlDescribeQuery, sparqlSelectQuery, sparqlSelectQuery, sparqlSelectQueryHasResults, testConnection, unregisterListener

Methods inherited from class edu.cornell.mannlib.vitro.webapp.rdfservice.impl.RDFServiceImpl

countTriples, createQuery, getRegisteredJenaModelChangedListeners, getRegisteredListeners, getSerializationFormatString, getTriples, getVitroRequest, newIndividual, newIndividual, notifyListeners, notifyListenersOfChanges, notifyListenersOfEvent, pyString, registerJenaModelChangedListener, separateStatementsWithBlankNodes, setVitroRequest, sparqlNode, sparqlNodeUpdate, sparqlTriple, toString, unregisterJenaModelChangedListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.cornell.mannlib.vitro.webapp.rdfservice.RDFService

countTriples, getTriples, getVitroRequest, newIndividual, newIndividual, registerJenaModelChangedListener, setVitroRequest, unregisterJenaModelChangedListener

Constructor Detail

RDFServiceVirtuoso

public RDFServiceVirtuoso(String baseURI,
                          String username,
                          String password)

Method Detail

executeUpdate

protected void executeUpdate(String updateString)
                      throws RDFServiceException

Overrides:

executeUpdate in class RDFServiceSparql

Throws:

RDFServiceException

getCredentials

protected org.apache.http.auth.UsernamePasswordCredentials getCredentials()

Overrides:

getCredentials in class RDFServiceSparql

isEquivalentGraph

public boolean isEquivalentGraph(String graphURI,
                                 InputStream serializedGraph,
                                 RDFService.ModelSerializationFormat serializationFormat)
                          throws RDFServiceException

Virtuoso has a bug which it shares with TDB: if given a literal of type xsd:nonNegativeInteger, it stores a literal of type xsd:integer. To determine whether this serialized graph is equivalent to what is already in Virtuoso, we need to do the same.

Specified by:

isEquivalentGraph in interface RDFService

Overrides:

isEquivalentGraph in class RDFServiceSparql

Parameters:

graphURI - - the URI of the graph to test against. May not be null.

serializedGraph - - the contents to be compared with the existing graph. May not be null.

serializationFormat - - May not be null.

Throws:

RDFServiceException

isEquivalentGraph

public boolean isEquivalentGraph(String graphURI,
                                 org.apache.jena.rdf.model.Model graph)
                          throws RDFServiceException

TDB has a bug: if given a literal of type xsd:nonNegativeInteger, it stores a literal of type xsd:integer. To determine whether this serialized graph is equivalent to what's in TDB, we need to do the same.

Specified by:

isEquivalentGraph in interface RDFService

Overrides:

isEquivalentGraph in class RDFServiceSparql

Parameters:

graphURI - - the URI of the graph to test against. May not be null.

graph - - the contents to be compared with the existing graph. May not be null.

Throws:

RDFServiceException