edu.cornell.mannlib.vitro.webapp.rdfservice

Interface RDFService

All Known Implementing Classes:

LanguageFilteringRDFService, LoggingRDFService, RDFServiceFactorySingle.UnclosableRDFService, RDFServiceImpl, RDFServiceJena, RDFServiceModel, RDFServiceSDB, RDFServiceSparql, RDFServiceSparqlHttp, RDFServiceTDB, RDFServiceVirtuoso, SameAsFilteringRDFServiceFactory.SameAsFilteringRDFService

public interface RDFService

Interface for API to write, read, and update Vitro's RDF store, with support to allow listening, logging and auditing.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	RDFService.ModelSerializationFormat
static class	RDFService.ResultFormat
static class	RDFService.SPARQLQueryType

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(com.hp.hpl.jena.rdf.model.RDFNode subject, com.hp.hpl.jena.rdf.model.RDFNode predicate, com.hp.hpl.jena.rdf.model.RDFNode object)
String	getDefaultWriteGraphURI() Returns the URI of the default write graph
void	getGraphMetadata() To be determined.
List<String>	getGraphURIs() Returns a list of all the graph URIs in the RDF store.
com.hp.hpl.jena.rdf.model.Model	getTriples(com.hp.hpl.jena.rdf.model.RDFNode subject, com.hp.hpl.jena.rdf.model.RDFNode predicate, com.hp.hpl.jena.rdf.model.RDFNode object, long limit, long offset)
boolean	isEquivalentGraph(String graphURI, InputStream serializedGraph, RDFService.ModelSerializationFormat serializationFormat) Tests to see whether the supplied serialization is equivalent to the named graph, as it exists in the store.
boolean	isEquivalentGraph(String graphURI, com.hp.hpl.jena.rdf.model.Model graph) Tests to see whether the supplied serialization is equivalent to the named graph, as it exists in the store.
ChangeSet	manufactureChangeSet() Creates a ChangeSet object
void	newIndividual(String individualURI, String individualTypeURI) If the given individual already exists in the default write graph, throws an RDFServiceException, otherwise adds one type assertion to the default write graph.
void	newIndividual(String individualURI, String individualTypeURI, String graphURI) If the given individual already exists in the given graph, throws an RDFServiceException, otherwise adds one type assertion to the given graph.
void	registerJenaModelChangedListener(com.hp.hpl.jena.rdf.model.ModelChangedListener changeListener) Registers a Jena listener to listen to changes in any graph in the RDF store.
void	registerListener(ChangeListener changeListener) Registers a listener to listen to changes in any graph in the RDF store.
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, com.hp.hpl.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) Performs a SPARQL select query against the knowledge base.
void	sparqlSelectQuery(String query, ResultSetConsumer consumer) Performs a SPARQL select query against the knowledge base.
void	unregisterJenaModelChangedListener(com.hp.hpl.jena.rdf.model.ModelChangedListener changeListener) Unregisters a Jena listener from listening to changes in any graph in the RDF store
void	unregisterListener(ChangeListener changeListener) Unregisters a listener from listening to changes in any graph in the RDF store

Method Detail

changeSetUpdate

boolean changeSetUpdate(ChangeSet changeSet)
                 throws RDFServiceException

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.

Parameters:

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

Returns:

boolean - indicates whether the precondition was satisfied

Throws:

RDFServiceException

newIndividual

void newIndividual(String individualURI,
                   String individualTypeURI)
            throws RDFServiceException

If the given individual already exists in the default write graph, throws an RDFServiceException, otherwise adds one type assertion to the default write graph.

Parameters:

individualURI - - URI of the individual to be added

individualTypeURI - - URI of the type for the individual

Throws:

RDFServiceException

newIndividual

void newIndividual(String individualURI,
                   String individualTypeURI,
                   String graphURI)
            throws RDFServiceException

If the given individual already exists in the given graph, throws an RDFServiceException, otherwise adds one type assertion to the given graph.

Parameters:

individualURI - - URI of the individual to be added

individualTypeURI - - URI of the type for the individual

graphURI - - URI of the graph to which to add the individual

Throws:

RDFServiceException

sparqlConstructQuery

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

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.

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

void sparqlConstructQuery(String query,
                          com.hp.hpl.jena.rdf.model.Model model)
                   throws RDFServiceException

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.

Parameters:

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

model - - the Model to add the statements to

Throws:

RDFServiceException

sparqlDescribeQuery

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

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.

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

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

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.

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

void sparqlSelectQuery(String query,
                       ResultSetConsumer consumer)
                throws RDFServiceException

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.

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

boolean sparqlAskQuery(String query)
                throws RDFServiceException

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.

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

List<String> getGraphURIs()
                   throws RDFServiceException

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

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

getGraphMetadata

void getGraphMetadata()
               throws RDFServiceException

To be determined. This is a place holder and is not implemented in current implementations.

Throws:

RDFServiceException

getDefaultWriteGraphURI

String getDefaultWriteGraphURI()
                        throws RDFServiceException

Returns the URI of the default write graph

Returns:

String URI of default write graph. Returns null if no default write graph has been set.

Throws:

RDFServiceException

serializeAll

void serializeAll(OutputStream outputStream)
           throws RDFServiceException

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.

Parameters:

outputStream - - receives the serialized result.

Throws:

RDFServiceException

serializeGraph

void serializeGraph(String graphURI,
                    OutputStream outputStream)
             throws RDFServiceException

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.

Parameters:

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

outputStream - - receives the serialized result.

Throws:

RDFServiceException

isEquivalentGraph

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

Tests to see whether the supplied serialization is equivalent to the named graph, as it exists in the store. Equivalence means that if this serialization were written to the store, the resulting graph would be isomorphic to the existing named graph.

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

boolean isEquivalentGraph(String graphURI,
                          com.hp.hpl.jena.rdf.model.Model graph)
                   throws RDFServiceException

Tests to see whether the supplied serialization is equivalent to the named graph, as it exists in the store. Equivalence means that if this serialization were written to the store, the resulting graph would be isomorphic to the existing named graph.

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

registerJenaModelChangedListener

void registerJenaModelChangedListener(com.hp.hpl.jena.rdf.model.ModelChangedListener changeListener)
                               throws RDFServiceException

Registers a Jena listener to listen to changes in any graph in the RDF store.

Parameters:

changeListener - - the change listener

Throws:

RDFServiceException

unregisterJenaModelChangedListener

void unregisterJenaModelChangedListener(com.hp.hpl.jena.rdf.model.ModelChangedListener changeListener)
                                 throws RDFServiceException

Unregisters a Jena listener from listening to changes in any graph in the RDF store

Parameters:

changeListener - - the change listener

Throws:

RDFServiceException

registerListener

void registerListener(ChangeListener changeListener)
               throws RDFServiceException

Registers a listener to listen to changes in any graph in the RDF store.

Parameters:

changeListener - - the change listener

Throws:

RDFServiceException

unregisterListener

void unregisterListener(ChangeListener changeListener)
                 throws RDFServiceException

Unregisters a listener from listening to changes in any graph in the RDF store

Parameters:

changeListener - - the change listener

Throws:

RDFServiceException

manufactureChangeSet

ChangeSet manufactureChangeSet()

Creates a ChangeSet object

Returns:

ChangeSet an empty ChangeSet object

countTriples

long countTriples(com.hp.hpl.jena.rdf.model.RDFNode subject,
                  com.hp.hpl.jena.rdf.model.RDFNode predicate,
                  com.hp.hpl.jena.rdf.model.RDFNode object)
           throws RDFServiceException

Throws:

RDFServiceException

getTriples

com.hp.hpl.jena.rdf.model.Model getTriples(com.hp.hpl.jena.rdf.model.RDFNode subject,
                                           com.hp.hpl.jena.rdf.model.RDFNode predicate,
                                           com.hp.hpl.jena.rdf.model.RDFNode object,
                                           long limit,
                                           long offset)
                                    throws RDFServiceException

Throws:

RDFServiceException

close

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.