com.hp.hpl.jena.sparql.core.DatasetGraph Java Examples

public static void initializeDataset(String serviceDesc) {
	// if (clean) {
	deleteDir(new File(databaseDirectory));
	if (!(new File(databaseDirectory)).mkdir()) {
		System.out.println("can not create working directory" + databaseDirectory);
	}
	DatasetGraph datasettdb = TDBFactory.createDatasetGraph(databaseDirectory);
	dataset = DatasetImpl.wrap(datasettdb);
	loadOntology(dataset);
	Model serviceBase = FileManager.get().loadModel(datasetDirectory + serviceDesc);
	dataset.getDefaultModel().add(ModelFactory.createOntologyModel(ontoSpec, serviceBase));
	// } else
	// dataset = TDBFactory.createDataset(databaseDirectory);
}
 

@Override
public void load( 
		final SolrQueryRequest request, 
		final SolrQueryResponse response,
		final ContentStream stream, 
		final UpdateRequestProcessor processor) throws Exception {
	
	final PipedRDFIterator<Quad> iterator = new PipedRDFIterator<Quad>();
	final StreamRDF inputStream = new PipedQuadsStream(iterator);
	
	executor.submit(new Runnable() {
		@Override
		public void run() {
			try {
				RDFDataMgr.parse(
						inputStream, 
						stream.getStream(), 
						RDFLanguages.contentTypeToLang(stream.getContentType()));
			} catch (final IOException exception) {
				throw new SolrException(ErrorCode.SERVER_ERROR, exception);
			}					
		}
	});
	
	final DatasetGraph dataset = new LocalDatasetGraph(request, response);
	while (iterator.hasNext()) {
		dataset.add(iterator.next());
	}									
}
 

@Override
public void load(
		final SolrQueryRequest request, 
		final SolrQueryResponse response,
		final ContentStream stream, 
		final UpdateRequestProcessor processor) throws Exception {
	
	final PipedRDFIterator<Triple> iterator = new PipedRDFIterator<Triple>();
	final StreamRDF inputStream = new PipedTriplesStream(iterator);
	
	executor.submit(new Runnable() {
		@Override
		public void run() {
			try {
				RDFDataMgr.parse(
						inputStream, 
						stream.getStream(), 
						RDFLanguages.contentTypeToLang(stream.getContentType()));
			} catch (final IOException exception) {
				throw new SolrException(ErrorCode.SERVER_ERROR, exception);
			}					
		}
	});
		
	// Graph Store Protocol indicates the target graph URI separately.
	// So the incoming Content-type here is one that maps "Triples Loader" but
	// the indexed tuple could be a Quad.
	final String graphUri = request.getParams().get(Names.GRAPH_URI_ATTRIBUTE_NAME);
	
	final DatasetGraph dataset = new LocalDatasetGraph(request, response, null, null);
	final Graph defaultGraph = graphUri == null 
			? dataset.getDefaultGraph() 
			: dataset.getGraph(NodeFactory.createURI(graphUri));
	while (iterator.hasNext()) {
		defaultGraph.add(iterator.next());
	}		
}
 

/**
 * Executes a given {@link UpdateRequest} against the given {@link DatasetGraph}.
 * 
 * @param updateRequest the update request.
 * @param datasetGraph the dataset graph.
 * @param graphUris the target graphs (optional).
 */
void execute(final UsingList list, final String updateRequests, final DatasetGraph datasetGraph) {
	try {
		UpdateAction.parseExecute(
				list, 
				datasetGraph, 
				new ByteArrayInputStream(updateRequests.getBytes("UTF-8")));		
	} catch (final Exception exception) {	
		final String message = MessageFactory.createMessage(
				MessageCatalog._00099_INVALID_UPDATE_QUERY, 
				updateRequests);
		LOGGER.error(message, exception);
		throw new SolrException(ErrorCode.BAD_REQUEST, message);
	}	
}
 

static public String matchSingleTmx(Node tmx, DatasetGraph g, Model m){
    String sq="";
    if (g.contains(null, tmx, typeNode, instantNode)) { // One Instant
        sq += "?ev <http://semanticweb.cs.vu.nl/2009/11/sem/hasTime> ?t . ?t a <http://www.w3.org/TR/owl-time#Instant> . ";
        for (Iterator<Quad> iter = g.find(null, tmx, specificTimeNode, null); iter.hasNext(); ) {
            Quad q = iter.next();
            sq += "?t <http://www.w3.org/TR/owl-time#inDateTime> <" + q.asTriple().getObject() + "> . ";
        }
    } else { // One Interval

        String intervalQuery = "SELECT ?begin ?end WHERE { <" + tmx + ">  <http://www.w3.org/TR/owl-time#hasBeginning> ?begin ; <http://www.w3.org/TR/owl-time#hasEnd> ?end . }";

        Query inQuery = QueryFactory.create(intervalQuery);

        // Create a single execution of this query, apply to a model
        // which is wrapped up as a Dataset
        QueryExecution inQexec = QueryExecutionFactory.create(inQuery, m);

        try {
            // Assumption: it’s a SELECT query.
            ResultSet inrs = inQexec.execSelect();
            // The order of results is undefined.
            for (; inrs.hasNext(); ) {
                QuerySolution evrb = inrs.nextSolution();
                // Get title - variable names do not include the ’?’
                String begin = evrb.get("begin").toString();
                String end = evrb.get("end").toString();

                String unionQuery = "{ ?ev <http://semanticweb.cs.vu.nl/2009/11/sem/hasTime> ?t . ?t a <http://www.w3.org/TR/owl-time#Interval> . ?t <http://www.w3.org/TR/owl-time#hasBeginning> <" + begin + "> ; <http://www.w3.org/TR/owl-time#hasEnd> <" + end + "> . } ";
                unionQuery += "UNION ";
                unionQuery += "{ ?ev <http://semanticweb.cs.vu.nl/2009/11/sem/hasEarliestBeginTimeStamp> ?t1 . ?t1 a <http://www.w3.org/TR/owl-time#Instant> . ?t1 <http://www.w3.org/TR/owl-time#inDateTime> <" + begin + "> . ?ev <http://semanticweb.cs.vu.nl/2009/11/sem/hasEarliestEndTimeStamp> ?t2 . ?t2 a <http://www.w3.org/TR/owl-time#Instant> . ?t2 <http://www.w3.org/TR/owl-time#inDateTime> <" + end + "> . } ";
                sq += unionQuery;
            }
        } finally {
            inQexec.close();
        }
    }
    return sq;
}
 

private static void inferIdentityRelations(String sparqlQuery, boolean matchILI, boolean matchLemma, boolean matchMultiple, int iliSize, Node eventId, DatasetGraph g) {
    if (matchILI || matchLemma) {
        sparqlQuery += "GROUP BY ?ev";
    }
    HttpAuthenticator authenticator = new SimpleAuthenticator(user, pass.toCharArray());
    QueryExecution x = QueryExecutionFactory.sparqlService(serviceEndpoint, sparqlQuery, authenticator);
    ResultSet resultset = x.execSelect();
    int threshold;
    while (resultset.hasNext()) {
        QuerySolution solution = resultset.nextSolution();
        if (matchILI || matchLemma) {
            if (matchILI)
                threshold = conceptMatchThreshold;
            else
                threshold=phraseMatchThreshold;

            if (matchMultiple) {
                //System.out.println(solution);
                if (checkIliLemmaThreshold(iliSize, solution.get("conceptcount").asLiteral().getInt(), solution.get("myconceptcount").asLiteral().getInt(), threshold)) {
                    insertIdentity(g, eventId, solution.get("ev").asNode());
                }
            } else {
                if (checkIliLemmaThreshold(1, solution.get("conceptcount").asLiteral().getInt(), 1, threshold)) {
                    insertIdentity(g, eventId, solution.get("ev").asNode());
                }
            }
        } else {
            insertIdentity(g, eventId, solution.get("ev").asNode());
        }
    }
}
 

public DatasetGraph asDatasetGraph() {
	// check already done by servlets before getting the graph
	//checkMappingFileChanged();
	return datasetGraph;
}
 

/**
 * Creates an appropriate {@link DatasetGraph} for this SolRDF instance.
 * 
 * @param request the current Solr request
 * @param response the current Solr response.
 * @param parser the Query parser associated with the current request.
 * @param consumer a {@link GraphEventConsumer} for this query cycle.
 * @return an appropriate {@link DatasetGraph} for this SolRDF instance.
 */
DatasetGraph datasetGraph(final SolrQueryRequest request, final SolrQueryResponse response, final QParser parser, final GraphEventConsumer consumer) {
	return request.getCore().getCoreDescriptor().getCoreContainer().isZooKeeperAware() 
			? new CloudDatasetGraph(request, response, server)
			: new LocalDatasetGraph(request, response, parser, consumer);
}
 

/**
 * Creates an appropriate {@link DatasetGraph} for this SolRDF instance.
 * 
 * @param request the current Solr request
 * @param response the current Solr response.
 * @param parser the Query parser associated with the current request.
 * @param consumer a {@link GraphEventConsumer} for this query cycle.
 * @return an appropriate {@link DatasetGraph} for this SolRDF instance.
 */
DatasetGraph datasetGraph(final SolrQueryRequest request, final SolrQueryResponse response) {
	return CLUSTER != null 
			? new CloudDatasetGraph(request, response, CLUSTER)
			: new LocalDatasetGraph(request, response);
}
 

private static void insertIdentity (DatasetGraph g, Node e1, Node e2){
    g.add(identityGraphNode, e1, identityNode, e2);

}