edu.cornell.mannlib.vitro.webapp.rdfservice.impl.jena.tdb

Class RDFServiceTDB

java.lang.Object

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

edu.cornell.mannlib.vitro.webapp.rdfservice.impl.jena.RDFServiceJena

edu.cornell.mannlib.vitro.webapp.rdfservice.impl.jena.tdb.RDFServiceTDB

All Implemented Interfaces:

RDFService

public class RDFServiceTDB
extends RDFServiceJena

An implementation that is based on Jena TDB.

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.jena.RDFServiceJena

rebuildGraphURICache

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

BNODE_ROOT_QUERY, defaultWriteGraphURI, registeredJenaListeners, registeredListeners

Constructor Summary

Constructors

Constructor and Description
RDFServiceTDB(String directoryPath)

Method Summary

Modifier and Type	Method and Description
boolean	changeSetUpdate(ChangeSet changeSet) Performs a series of additions to and or removals from specified graphs in the RDF store.
void	close() Frees any resources held by this RDFService object The implementation of this method should be idempotent so that multiple invocations do not cause an error.
long	countTriples(org.apache.jena.rdf.model.RDFNode subject, org.apache.jena.rdf.model.RDFNode predicate, org.apache.jena.rdf.model.RDFNode object)
protected DatasetWrapper	getDatasetWrapper()
List<String>	getGraphURIs() Returns a list of all the graph URIs in the RDF store.
org.apache.jena.rdf.model.Model	getTriples(org.apache.jena.rdf.model.RDFNode subject, org.apache.jena.rdf.model.RDFNode predicate, org.apache.jena.rdf.model.RDFNode object, long limit, long offset)
boolean	isEquivalentGraph(String graphURI, InputStream serializedGraph, RDFService.ModelSerializationFormat serializationFormat) TDB has a bug: 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.
boolean	preferPreciseOptionals()
void	serializeAll(OutputStream outputStream) Serializes the union of all named and unnamed graphs in the store to the supplied OutputStream, in N-Quads format.
void	serializeGraph(String graphURI, OutputStream outputStream) Serializes the contents of the named graph to the supplied OutputStream, in N-Triples format.
boolean	sparqlAskQuery(String query) Performs a SPARQL ASK query against the knowledge base.
void	sparqlConstructQuery(String query, org.apache.jena.rdf.model.Model model) Performs a SPARQL construct query against the knowledge base.
InputStream	sparqlConstructQuery(String query, RDFService.ModelSerializationFormat resultFormat) Performs a SPARQL construct query against the knowledge base.
InputStream	sparqlDescribeQuery(String query, RDFService.ModelSerializationFormat resultFormat) Performs a SPARQL describe query against the knowledge base.
InputStream	sparqlSelectQuery(String query, RDFService.ResultFormat resultFormat) TODO Is there a way to accomplish this without buffering the entire result?
void	sparqlSelectQuery(String query, ResultSetConsumer consumer) Performs a SPARQL select query against the knowledge base.

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

applyChangeSetToModel, createQueryExecution, getGraphMetadata, getVitroRequest, insureThatInputStreamsAreResettable, notifyListenersOfPostChangeEvents, notifyListenersOfPreChangeEvents, operateOnModel, setVitroRequest

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

createQuery, getDefaultWriteGraphURI, getRegisteredJenaModelChangedListeners, getRegisteredListeners, getSerializationFormatString, isPreconditionSatisfied, manufactureChangeSet, newIndividual, newIndividual, notifyListeners, notifyListenersOfChanges, notifyListenersOfEvent, pyString, registerJenaModelChangedListener, registerListener, separateStatementsWithBlankNodes, sparqlNode, sparqlNodeUpdate, sparqlSelectQueryHasResults, sparqlTriple, toString, unregisterJenaModelChangedListener, unregisterListener

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

getDefaultWriteGraphURI, manufactureChangeSet, newIndividual, newIndividual, registerJenaModelChangedListener, registerListener, unregisterJenaModelChangedListener, unregisterListener

Constructor Detail

RDFServiceTDB

public RDFServiceTDB(String directoryPath)
              throws IOException

Throws:

IOException

Method Detail

getDatasetWrapper

protected DatasetWrapper getDatasetWrapper()

Specified by:

getDatasetWrapper in class RDFServiceJena

changeSetUpdate

public boolean changeSetUpdate(ChangeSet changeSet)
                        throws RDFServiceException

Description copied from interface: RDFService

Performs a series of additions to and or removals from specified graphs in the RDF store. preConditionSparql is executed against the union of all the graphs in the knowledge base before any updates are made. If the precondition query returns a non-empty result, no updates are made made.

Specified by:

changeSetUpdate in interface RDFService

Specified by:

changeSetUpdate in class RDFServiceJena

Parameters:

changeSet - - a set of changes to be performed on the RDF store.

Returns:

boolean - indicates whether the precondition was satisfied

Throws:

RDFServiceException

preferPreciseOptionals

public boolean preferPreciseOptionals()

Specified by:

preferPreciseOptionals in interface RDFService

Overrides:

preferPreciseOptionals in class RDFServiceJena

close

public void close()

Description copied from interface: RDFService

Frees any resources held by this RDFService object The implementation of this method should be idempotent so that multiple invocations do not cause an error.

Specified by:

close in interface RDFService

Overrides:

close in class RDFServiceJena

sparqlConstructQuery

public InputStream sparqlConstructQuery(String query,
                                        RDFService.ModelSerializationFormat resultFormat)
                                 throws RDFServiceException

Description copied from interface: RDFService

Performs a SPARQL construct query against the knowledge base. The query may have an embedded graph identifier. If the query does not contain a graph identifier the query is executed against the union of all named and unnamed graphs in the store.

Specified by:

sparqlConstructQuery in interface RDFService

Overrides:

sparqlConstructQuery in class RDFServiceJena

Parameters:

query - - the SPARQL query to be executed against the RDF store

resultFormat - - type of serialization for RDF result of the SPARQL query

Returns:

InputStream - the result of the query

Throws:

RDFServiceException

sparqlConstructQuery

public void sparqlConstructQuery(String query,
                                 org.apache.jena.rdf.model.Model model)
                          throws RDFServiceException

Description copied from interface: RDFService

Performs a SPARQL construct query against the knowledge base. The query may have an embedded graph identifier. If the query does not contain a graph identifier the query is executed against the union of all named and unnamed graphs in the store.

Specified by:

sparqlConstructQuery in interface RDFService

Overrides:

sparqlConstructQuery in class RDFServiceJena

Parameters:

query - - the SPARQL query to be executed against the RDF store

model - - the Model to add the statements to

Throws:

RDFServiceException

sparqlDescribeQuery

public InputStream sparqlDescribeQuery(String query,
                                       RDFService.ModelSerializationFormat resultFormat)
                                throws RDFServiceException

Description copied from interface: RDFService

Performs a SPARQL describe query against the knowledge base. The query may have an embedded graph identifier. If the query does not contain a graph identifier the query is executed against the union of all named and unnamed graphs in the store.

Specified by:

sparqlDescribeQuery in interface RDFService

Overrides:

sparqlDescribeQuery in class RDFServiceJena

Parameters:

query - - the SPARQL query to be executed against the RDF store

resultFormat - - type of serialization for RDF result of the SPARQL query

Returns:

InputStream - the result of the query

Throws:

RDFServiceException

sparqlSelectQuery

public InputStream sparqlSelectQuery(String query,
                                     RDFService.ResultFormat resultFormat)
                              throws RDFServiceException

Description copied from class: RDFServiceJena

TODO Is there a way to accomplish this without buffering the entire result?

Specified by:

sparqlSelectQuery in interface RDFService

Overrides:

sparqlSelectQuery in class RDFServiceJena

Parameters:

query - - the SPARQL query to be executed against the RDF store

resultFormat - - format for the result of the Select query

Returns:

InputStream - the result of the query

Throws:

RDFServiceException

sparqlSelectQuery

public void sparqlSelectQuery(String query,
                              ResultSetConsumer consumer)
                       throws RDFServiceException

Description copied from interface: RDFService

Performs a SPARQL select query against the knowledge base. The query may have an embedded graph identifier. If the query does not contain a graph identifier the query is executed against the union of all named and unnamed graphs in the store.

Specified by:

sparqlSelectQuery in interface RDFService

Overrides:

sparqlSelectQuery in class RDFServiceJena

Parameters:

query - - the SPARQL query to be executed against the RDF store

consumer - - the class to consume the results of the query

Throws:

RDFServiceException

sparqlAskQuery

public boolean sparqlAskQuery(String query)
                       throws RDFServiceException

Description copied from interface: RDFService

Performs a SPARQL ASK query against the knowledge base. The query may have an embedded graph identifier. If the query does not contain a graph identifier the query is executed against the union of all named and unnamed graphs in the store.

Specified by:

sparqlAskQuery in interface RDFService

Overrides:

sparqlAskQuery in class RDFServiceJena

Parameters:

query - - the SPARQL ASK query to be executed against the RDF store

Returns:

boolean - the result of the SPARQL ASK query

Throws:

RDFServiceException

getGraphURIs

public List<String> getGraphURIs()
                          throws RDFServiceException

Description copied from interface: RDFService

Returns a list of all the graph URIs in the RDF store.

Specified by:

getGraphURIs in interface RDFService

Overrides:

getGraphURIs in class RDFServiceJena

Returns:

list of all the named graph URIs in the RDF store. Return an empty list of there no named graphs in the store.

Throws:

RDFServiceException

serializeAll

public void serializeAll(OutputStream outputStream)
                  throws RDFServiceException

Description copied from interface: RDFService

Serializes the union of all named and unnamed graphs in the store to the supplied OutputStream, in N-Quads format. This method is designed for exporting data from VIVO, so any filters should be bypassed. If possible, this should be done without buffering in memory, so arbitrarily large graphs can be exported.

Specified by:

serializeAll in interface RDFService

Overrides:

serializeAll in class RDFServiceJena

Parameters:

outputStream - - receives the serialized result.

Throws:

RDFServiceException

serializeGraph

public void serializeGraph(String graphURI,
                           OutputStream outputStream)
                    throws RDFServiceException

Description copied from interface: RDFService

Serializes the contents of the named graph to the supplied OutputStream, in N-Triples format. This method is designed for exporting data from VIVO, so any filters should be bypassed. If possible, this should be done without buffering in memory, so arbitrarily large graphs can be exported.

Specified by:

serializeGraph in interface RDFService

Overrides:

serializeGraph in class RDFServiceJena

Parameters:

graphURI - - the URI of the desired graph. May not be null.

outputStream - - receives the serialized result.

Throws:

RDFServiceException

isEquivalentGraph

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

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 RDFServiceJena

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

countTriples

public long countTriples(org.apache.jena.rdf.model.RDFNode subject,
                         org.apache.jena.rdf.model.RDFNode predicate,
                         org.apache.jena.rdf.model.RDFNode object)
                  throws RDFServiceException

Specified by:

countTriples in interface RDFService

Overrides:

countTriples in class RDFServiceJena

Throws:

RDFServiceException

getTriples

public org.apache.jena.rdf.model.Model getTriples(org.apache.jena.rdf.model.RDFNode subject,
                                                  org.apache.jena.rdf.model.RDFNode predicate,
                                                  org.apache.jena.rdf.model.RDFNode object,
                                                  long limit,
                                                  long offset)
                                           throws RDFServiceException

Specified by:

getTriples in interface RDFService

Overrides:

getTriples in class RDFServiceJena

Throws:

RDFServiceException