com.hp.hpl.jena.query.ResultSet Java Examples

public static void main(String[] args) {
	ModelD2RQ m = new ModelD2RQ("file:doc/example/mapping-iswc.ttl");
	String sparql = 
		"PREFIX dc: <http://purl.org/dc/elements/1.1/>" +
		"PREFIX foaf: <http://xmlns.com/foaf/0.1/>" +
		"SELECT ?paperTitle ?authorName WHERE {" +
		"    ?paper dc:title ?paperTitle . " +
		"    ?paper dc:creator ?author ." +
		"    ?author foaf:name ?authorName ." +
		"}";
	Query q = QueryFactory.create(sparql); 
	ResultSet rs = QueryExecutionFactory.create(q, m).execSelect();
	while (rs.hasNext()) {
		QuerySolution row = rs.nextSolution();
		System.out.println("Title: " + row.getLiteral("paperTitle").getString());
		System.out.println("Author: " + row.getLiteral("authorName").getString());
	}
	m.close();
}
 

/**
 * @return all of the {@link Datatype}s
 */
public List<? super DatatypeResource> getDatatypes() {
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append(PREFIX_XSD)
			.append("SELECT ?datatype FROM <").append(MDRDatabase.BASE_URI)
			.append("> WHERE {")
			.append("?datatype rdfs:subClassOf mdr:Datatype }");

	List<DatatypeResource> datatypeList = new ArrayList<DatatypeResource>();
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			Resource res = qs.getResource("datatype");
			datatypeList.add(new DatatypeImpl(res, mdrDatabase));
		}
	} finally {
		qexec.close();
	}
	return datatypeList;
}
 

public int getNumberOfObjectClasses(String contextURI) {
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS)
			.append("SELECT (COUNT (DISTINCT ?objectClass) as ?count) FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?objectClassClass rdfs:subClassOf mdr:ObjectClass .")
			.append("?objectClass rdfs:subClassOf ?objectClassClass .")
			.append("?objectClass mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> .").append("}");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	int size = 0;
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			size = qs.getLiteral("count").getInt();
		}
	} finally {
		qexec.close();
	}

	return size;
}
 

public static EventPattern extractQueryFromDataset(String serviceRequest) {
	Model queryBase = FileManager.get().loadModel(datasetDirectory + serviceRequest);
	dataset.getDefaultModel().add(ModelFactory.createOntologyModel(ontoSpec, queryBase));

	String describeStr = queryPrefix + " select ?x  where{?x rdf:type ces:EventRequest}";
	// Query query = QueryFactory.create(describeStr);
	// query.setPrefixMapping(pmap);
	QueryExecution qe = QueryExecutionFactory.create(describeStr, dataset);
	ResultSet results = qe.execSelect();
	// ResultSetFormatter.out(System.out, results, query);
	Map<String, EventDeclaration> edMap = new HashMap<String, EventDeclaration>();
	EventPattern ep = new EventPattern();
	ep.setQuery(true);
	while (results.hasNext()) {
		// System.out.println("results!");
		QuerySolution row = results.next();
		RDFNode edID = row.get("x");
		// System.out.println("has id: " + edID.toString());
		ep = extractEDByServiceID(edID, dataset, edMap).getEp();
	}
	return ep;
}
 

public List<? super ContextResource> getContextsOfContext(String contextURI) {
	List<ContextResource> contextResourceList = new ArrayList<ContextResource>();

	StringBuilder queryString = new StringBuilder().append(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT ?ctx FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?ctx rdfs:subClassOf mdr:Context .")
			.append("?ctx mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> .").append("FILTER (?ctx != <")
			.append(contextURI).append("> )  }");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			ContextResource ctx = new ContextImpl(qs.getResource("ctx"),
					this.mdrDatabase);
			contextResourceList.add(ctx);
		}
	} finally {
		qexec.close();
	}
	return contextResourceList;
}
 

private static Map<String, EventDeclaration> extractEDsFromDataset(Dataset dataset) {
	// List<EventDeclaration> eds = new ArrayList<EventDeclaration>();
	String describeStr = queryPrefix
			+ " select ?x"
			+ " where{?x rdf:type ?y graph <http://www.insight-centre.org/ces#> { ?y rdfs:subClassOf ces:EventService}}";
	// Query query = QueryFactory.create(describeStr);
	// query.setPrefixMapping(pmap);
	QueryExecution qe = QueryExecutionFactory.create(describeStr, dataset);
	ResultSet results = qe.execSelect();
	// ResultSetFormatter.out(System.out, results, query);
	Map<String, EventDeclaration> edMap = new HashMap<String, EventDeclaration>();
	while (results.hasNext()) {
		QuerySolution row = results.next();
		RDFNode edID = row.get("x");
		// System.out.println("has id: " + edID.toString());
		extractEDByServiceID(edID, dataset, edMap);
	}
	// RDFDataMgr.write(System.out, results, Lang.TURTLE);
	return edMap;
}
 

private static String extractFoIById(Dataset dataset, String foiId) {
	String queryStr = queryPrefix + " select  ?a ?b ?c ?d where { <" + foiId + "> ct:hasStartLatitude ?a. <"
			+ foiId + "> ct:hasStartLongitude ?b. <" + foiId + "> ct:hasEndLatitude ?c. <" + foiId
			+ "> ct:hasEndLongitude ?d.}";
	QueryExecution qe = QueryExecutionFactory.create(queryStr, dataset);
	ResultSet results = qe.execSelect();
	if (results.hasNext()) {
		// RDFNode foi = results.next().get("y");
		QuerySolution qs = results.next();
		Double startLat = qs.getLiteral("a").getDouble();
		Double startLon = qs.getLiteral("b").getDouble();
		Double endLat = qs.getLiteral("c").getDouble();
		Double endLon = qs.getLiteral("d").getDouble();
		return startLat + "," + startLon + "-" + endLat + "," + endLon;
		// ed.setFoi(startLat + "," + startLon + "-" + endLat + "," + endLon);
		// }
	}
	return null;

}
 

public List<? super PropertyResource> getPropertiesOfContext(
		String contextURI) {
	List<PropertyResource> propertyList = new ArrayList<PropertyResource>();
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT ?property FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?property rdfs:subClassOf mdr:Property .")
			.append("?property mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> .").append("}");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			PropertyResource prop = new PropertyImpl(
					qs.getResource("property"), mdrDatabase);
			propertyList.add(prop);
		}
	} finally {
		qexec.close();
	}
	return propertyList;
}
 

public static EventPattern extractCompositionPlanFromDataset(String serviceRequest) {
	Model queryBase = FileManager.get().loadModel(datasetDirectory + serviceRequest);
	dataset.getDefaultModel().add(ModelFactory.createOntologyModel(ontoSpec, queryBase));

	String describeStr = queryPrefix + " select ?x  where{?x rdf:type ces:CompositionPlan}";
	// Query query = QueryFactory.create(describeStr);
	// query.setPrefixMapping(pmap);
	QueryExecution qe = QueryExecutionFactory.create(describeStr, dataset);
	ResultSet results = qe.execSelect();
	// ResultSetFormatter.out(System.out, results, query);
	Map<String, EventDeclaration> edMap = new HashMap<String, EventDeclaration>();
	EventPattern ep = new EventPattern();
	ep.setQuery(false);
	while (results.hasNext()) {
		// System.out.println("results!");
		QuerySolution row = results.next();
		RDFNode edID = row.get("x");
		// System.out.println("has id: " + edID.toString());
		ep = extractEDByServiceID(edID, dataset, edMap).getEp();
	}
	return ep;
}
 

public static EventPattern extractQueryFromModel(Model serviceRequest) {
	// Model queryBase = FileManager.get().loadModel(datasetDirectory + serviceRequest);
	dataset.getDefaultModel().add(ModelFactory.createOntologyModel(ontoSpec, serviceRequest));

	String describeStr = queryPrefix + " select ?x  where{?x rdf:type ces:EventRequest}";
	// Query query = QueryFactory.create(describeStr);
	// query.setPrefixMapping(pmap);
	QueryExecution qe = QueryExecutionFactory.create(describeStr, dataset);
	ResultSet results = qe.execSelect();
	// ResultSetFormatter.out(System.out, results, query);
	Map<String, EventDeclaration> edMap = new HashMap<String, EventDeclaration>();
	EventPattern ep = new EventPattern();

	while (results.hasNext()) {
		// System.out.println("results!");
		QuerySolution row = results.next();
		RDFNode edID = row.get("x");
		// System.out.println("has id: " + edID.toString());
		ep = extractEDByServiceID(edID, dataset, edMap).getEp();
	}
	return ep;
}
 

/**
 * It executes a SELECT SPARQL query on the SPARQL endpoint, to get 
 * the URIs of the resources to use to discover links towards external datasets.
 *
 * @param sparqlEndpointURI		the SPARQL endpoint URI.  
 * @param graphName 			the graphName, null in case of default graph.
 * @param user					the user name for the SPARQl endpoint.
 * @param password				the password for the SPARQl endpoint.
 * @param query					the query to use to look for the resources.
 * @param offset				causes the solutions generated to start after the 
 *                              specified number of solutions.
 * @param limit					upper bound on the number of solutions returned.
 * @return a list of the matched URIs.
 * @since 2.0
 */
public ResourceToLink[] getResourcesToLink(final String sparqlEndpointURI, final String user, final String password, final String sparql, final Integer offset, final Integer limit) {
  	final ArrayList<ResourceToLink> resourcesList = new ArrayList<ResourceToLink>();
  	final String query = sparql + " OFFSET " + offset + " LIMIT " + limit;
       // Execute the query and obtain results
  	final ResultSet results = rdfstoreDAO.executeSelect(sparqlEndpointURI, user, password, query);
 	if (results != null){
           while (results.hasNext())
           {
           	final QuerySolution soln = results.nextSolution() ;
           	final Resource res = soln.getResource("res");
       		final String resURI = res.getURI();
           	final String textToSearch = soln.getLiteral("text").getString();
           	final ResourceToLink resToLink = new ResourceToLink(textToSearch, resURI);
       		resourcesList.add(resToLink);
           }
	}
	if (resourcesList.isEmpty()) {
		return new ResourceToLink[0];
	}
	return (ResourceToLink[]) resourcesList.toArray(new ResourceToLink[resourcesList.size()]);
}
 

public String crm2AliadaClass(final String crmClass) {
	final Query query = QueryFactory.create(CRM_TO_ALIADA_CLASS_P1 + crmClass + CRM_TO_ALIADA_CLASS_P2);
	ARQ.getContext().setTrue(ARQ.useSAX);
       
	QueryExecution execution = null;
	try {
		execution = QueryExecutionFactory.sparqlService("http://172.25.5.15:8890/sparql", query);
		execution.setTimeout(2000, 5000);
		final ResultSet results = execution.execSelect();
		//Iterating over the SPARQL Query results
		while (results.hasNext()) {
			QuerySolution soln = results.nextSolution();
			//Printing DBpedia entries' abstract.
			System.out.println(soln.get("?abstract"));   
			return soln.get("?abstract").asResource().getURI();
		}
		return "NULL";
       } finally {
       	try {
       		execution.close();
		} catch (Exception exception) {
			// TODO: handle exception
		}
       }

}
 

public Model extractLocalData(Model result, String IRI, Model m, List<String> queries) throws Exception {

		// System.out.println("executing query on IRI");
		Resource subject = result.createResource(IRI);
		for (String query : queries) {
			QueryExecution qe = QueryExecutionFactory.create(parseQuery(query, IRI, null, -1, null), m);
			try {
				ResultSet rs = qe.execSelect();
				List<Statement> sl = new ArrayList<Statement>();
				while (rs.hasNext()) {
					QuerySolution qs = rs.next();
					RDFNode subject2 = qs.get("s");
					RDFNode property = qs.get("p");
					RDFNode object = qs.get("o");
					result.add(result.createStatement(subject2 != null ? subject2.asResource() : subject, property.as(Property.class), object));
				}
				result.add(sl);
			} catch (Exception e) {
				e.printStackTrace();
				throw new Exception("error in query execution: " + e.getMessage());
			} finally {
				qe.close();
			}
		}
		return result;
	}
 

public int getNumberOfConceptualDomains(String contextURI) {
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS)
			.append("SELECT (COUNT (DISTINCT ?cd) as ?count) FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?cdClass rdfs:subClassOf mdr:ConceptualDomain .")
			.append("?cd rdfs:subClassOf ?cdClass .")
			.append("?cd mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> .").append("}");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	int size = 0;
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			size = qs.getLiteral("count").getInt();
		}
	} finally {
		qexec.close();
	}

	return size;
}
 

public DataEntry getDataEntryFromRS(ResultSet rs) {
	DataEntry dataEntry = new DataEntry();
	QuerySolution soln = rs.nextSolution();
	String colName, value;
	boolean useColumnNumbers = this.isUsingColumnNumbers();
	/* for each column get the colName and colValue and add to the data entry */
	for (int i = 0; i < rs.getResultVars().size(); i++) {
		colName = rs.getResultVars().get(i);
		RDFNode node = soln.get(colName) ;  			
		if (node.isLiteral()) {
			value = convertRSToString(soln, colName);
		} else {
			value = soln.getResource(colName).getURI();
		}			
		dataEntry.addValue(useColumnNumbers ? Integer.toString(i + 1) : 
			colName, new ParamValue(value));
	}
	return dataEntry;
}
 

public static ArrayList<String> readEventIdsFromKs(String sparqlQuery)throws Exception {
    ArrayList<String> eventIds = new ArrayList<String>();
    //System.out.println("serviceEndpoint = " + serviceEndpoint);
    //System.out.println("sparqlQuery = " + sparqlQuery);
    //System.out.println("user = " + user);
    //System.out.println("pass = " + pass);
    HttpAuthenticator authenticator = new SimpleAuthenticator(user, pass.toCharArray());

    QueryExecution x = QueryExecutionFactory.sparqlService(serviceEndpoint, sparqlQuery, authenticator);
    ResultSet resultset = x.execSelect();
    while (resultset.hasNext()) {
        QuerySolution solution = resultset.nextSolution();
        //System.out.println("solution.toString() = " + solution.toString());
        //( ?event = <http://www.newsreader-project.eu/data/Dasym-Pilot/425819_relink_dominant.naf#ev24> )
        String currentEvent = solution.get("event").toString();
        //System.out.println("currentEvent = " + currentEvent);
        //http://www.newsreader-project.eu/data/Dasym-Pilot/425819_relink_dominant.naf#ev24
        if (!eventIds.contains(currentEvent)) {
            eventIds.add(currentEvent);
        }
    }
    return eventIds;
}
 

/**
 * Positive test.
 */
@Test
public void range() {
	final int offset = 120; 
	final int size = 24;
	
	final ResultSetRewindable cut = new PagedResultSet(executeQuery(), size, offset);
	final ResultSet resultSet = executeQuery();
	
	while (cut.hasNext()) {
		cut.next();
	}
	
	assertEquals(size, cut.size());
	cut.reset();
	
	for (int i = 0; i < offset; i++) {
		resultSet.next();
	}
	
	for (int i = 0; i < size; i++) {
		assertEquals(resultSet.nextBinding(), cut.nextBinding());
	}
	
	assertFalse(cut.hasNext());
}
 

public static void getJob(GraphDatabaseService njgraph)
{
	NeoGraph graph = new NeoGraph(njgraph);
	Model njmodel = ModelFactory.createModelForGraph(graph);
	
	ST descJob = TemplateLoader.getQueriesGroup().getInstanceOf("getGraph");
	String queryASString = Constants.QUERY_PREFIX+ descJob.render();
	
	Query query = QueryFactory.create(queryASString, Syntax.syntaxSPARQL_11);
	QueryExecution qexec = QueryExecutionFactory.create(query, njmodel);
	ResultSet res = qexec.execSelect();
	
	int count=0;
       while(res.hasNext()){
       	//System.out.println("in while"+count);
       	QuerySolution sol = res.next();
       	System.out.println(sol.get("?Z"));
       	count++;
       }
      
      //log.info("Record fetched:"+ count);
      System.out.println("Record fetched:"+ count);
}
 

/**
 * It executes a SELECT SPARQL query on the SPARQL endpoint.
 *
 * @param sparqlEndpointURI		the SPARQL endpoint URI.  
 * @param user					the user name for the SPARQl endpoint.
 * @param password				the password for the SPARQl endpoint.
 * @param query					the query to use to look for the resources.
 * @return the {@link com.hp.hpl.jena.query.ResultSet} of the SELECT SPARQL query.
 * @since 2.0
 */
public ResultSet executeSelect(final String sparqlEndpointURI, final String user, final String password, final String query) {
	ResultSet results = null;
 	try {
        // Execute the query and obtain results
        final QueryExecution qexec = QueryExecutionFactory.sparqlService(
        		sparqlEndpointURI, 
        		QueryFactory.create(query), 
				auth(sparqlEndpointURI, user, password));
        qexec.setTimeout(2000, 5000);
           results = qexec.execSelect() ;
        qexec.close() ;
      } catch (Exception exception) {
		LOGGER.error(MessageCatalog._00035_SPARQL_FAILED, exception, query);
	}
 	return results;
}
 

public ResultSet importResultSet(InputStream in, String format) {
    ResultSet results = null;
    if(in != null) {
        if("JSON".equalsIgnoreCase(format)) {
            System.out.println("Processing SPARQL results set as JSON");
            results = JSONInput.fromJSON(in);
        }
        else if("XML".equalsIgnoreCase(format)) {
            System.out.println("Processing SPARQL results set as XML");
            results = ResultSetFactory.fromXML(in);
        }
        else if("RDF/XML".equalsIgnoreCase(format)) {
            System.out.println("Processing SPARQL results set as RDF/XML");
            results = ResultSetFactory.load(in, ResultsFormat.FMT_RDF_XML);
        }
    }
    return results;
}
 

public static ArrayList<Statement> readTriplesFromKs(String subjectUri, String sparqlQuery){

        ArrayList<Statement> triples = new ArrayList<Statement>();
        HttpAuthenticator authenticator = new SimpleAuthenticator(user, pass.toCharArray());
        try {
            qCount++;
            QueryExecution x = QueryExecutionFactory.sparqlService(serviceEndpoint, sparqlQuery, authenticator);
            ResultSet resultset = x.execSelect();
            while (resultset.hasNext()) {
                QuerySolution solution = resultset.nextSolution();
                String relString = solution.get("predicate").toString();
                RDFNode obj = solution.get("object");
                Model model = ModelFactory.createDefaultModel();
                Resource subj = model.createResource(subjectUri);
                Statement s = createStatement(subj, ResourceFactory.createProperty(relString), obj);
                triples.add(s);
            }
        } catch (Exception e) {
            //e.printStackTrace();
        }
        return triples;
    }
 

private Object getSameResource(Model model, String typePrefix,
        Element item, Document dataDoc) throws XPathExpressionException {
    QueryExecution qExec = null;
    try {
        String query = getEqualsQuery(model, typePrefix, item, dataDoc);
        LogUtils.debug(this.getClass(), query);
        qExec = QueryExecutionFactory.create(query, model);
        ResultSet rs = qExec.execSelect();
        while (rs.hasNext()) {
            QuerySolution solution = rs.next();
            return solution.get("?x0");
        }
    } catch (Exception e) {
        if (debug) {
            e.printStackTrace();
        }
    } finally {
        if (qExec != null) {
            qExec.close();
        }
    }
    return null;
}
 

public String testEndpoint(ConfigurationBean conf) {
	System.out.println("testing connection on " + conf.getEndPointUrl());
	QueryExecution qe = QueryExecutionFactory.sparqlService(conf.getEndPointUrl(), "select ?s {?s ?p ?o} LIMIT 1");
	String msg = "";
	try {
		ResultSet rs = qe.execSelect();
		if (rs.hasNext()) {
			System.out.println("is online");
			msg = "online";
		} else {
			System.out.println("is offline");
			msg = "offline";
		}
	} catch (Exception e) {
		System.out.println("is offline " + e.getMessage());
		msg = "offline " + e.getMessage();
	} finally {
		qe.close();
	}
	return msg;
}
 

public List<? super ValueDomainResource> getValueDomainsOfConceptualDomain(
		String cdURI) {
	List<ValueDomainResource> vdList = new ArrayList<ValueDomainResource>();
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT ?vd FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?vdClass rdfs:subClassOf mdr:ValueDomain .")
			.append("?vd rdfs:subClassOf ?vdClass . ")
			.append("?vd mdr:representingConceptualDomainRepresentation <")
			.append(cdURI).append("> .").append("}");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			// here conceptualDomain is checked whether its enumerated or
			// not, proper instantiation is done
			OntClass res = mdrDatabase.getOntModel().getOntClass(
					qs.getResource("vd").getURI());
			if (res.hasSuperClass(mdrDatabase.getVocabulary().EnumeratedValueDomain)) {
				vdList.add(new EnumeratedValueDomainImpl(res, mdrDatabase));
			} else {
				vdList.add(new NonEnumeratedValueDomainImpl(res,
						mdrDatabase));
			}

		}
	} finally {
		qexec.close();
	}

	return vdList;
}
 

public ResultSet getDerivationRulesOfContext(String contextURI) {
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT ?dr FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?dr rdfs:subClassOf mdr:DerivationRule .")
			.append("?dr mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> . }");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	return qexec.execSelect();

}
 

public <T> T select(ResultProcessor<T> collector) {
	try(QueryExecution execution = QueryExecutionFactory.create(build(),this.model)) {
		ResultSet resultSet = execution.execSelect();
		while(resultSet.hasNext()) {
			collector.handle(resultSet.next());
		}
		return collector.getResult();
	}
}
 

/**
 * With a size equals to 0, the {@link PagedResultSet} will be empty, 
 * but at least one iteration step needs to be done on the wrapped {@link ResultSet}.
 */
@Test
public void zeroSize() {
	final ResultSet rs = mock(ResultSet.class);
	when(rs.hasNext()).thenReturn(true);
	
	final ResultSetRewindable cut = new PagedResultSet(rs, 0, 10);
	
	verify(rs).next();
	
	assertFalse(cut.hasNext());
}
 

public List<? super ValueMeaningResource> listValueMeningsOfCD(
		String cdURI, int limit, int offset) {
	List<ValueMeaningResource> vmList = new ArrayList<ValueMeaningResource>();
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT DISTINCT ?vm FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?vm rdfs:subClassOf mdr:ValueMeaning .")
			.append("?vm mdr:valueMeaningIdentifier ?id . ")
			.append("?vm mdr:containedInValueMeaningSet <").append(cdURI)
			.append("> .").append("} ORDER BY ?id LIMIT ").append(limit)
			.append(" OFFSET ").append(offset);
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	try {
		ResultSet rs = qexec.execSelect();
		while (rs.hasNext()) {
			QuerySolution qs = rs.next();
			// here conceptualDomain is checked whether its enumerated or
			// not, proper instantiation is done
			OntClass res = mdrDatabase.getOntModel().getOntClass(
					qs.getResource("vm").getURI());
			if (res.hasSuperClass(mdrDatabase.getVocabulary().EnumeratedValueDomain)) {
				vmList.add(new ValueMeaningImpl(res, mdrDatabase));
			} else {
				vmList.add(new ValueMeaningImpl(res, mdrDatabase));
			}

		}
	} finally {
		qexec.close();
	}

	return vmList;
}
 

/**
 * Builds a new {@link PagedResultSet} decorator on top of a given {@link ResultSet}.
 * 
 * @param resultSet the wrapped resultset.
 * @param size the rows that should be effectively part of this resultset.
 * @param offset the start offset within the wrapped resultset.
 */
PagedResultSet(final ResultSet resultSet, final int size, final int offset) {
	this.resultSet = resultSet;
	this.size = size > 0 ? size : 0;
	this.offset = offset > 0 ? offset : 0;
	
	if (this.resultSet == null) {
		currentState = new CachedResultSet();			
	} else {
		this.resultVars = resultSet.getResultVars();
		this.resourceModel = resultSet.getResourceModel();			
		if (this.size == 0 && this.resultSet.hasNext()) { 
			// Special case: If we asked for 0 rows we still need to do at least one step iteration
			// This is because we need to trigger a request to Solr in order to collect DocSet (e.g. for faceting) 
			resultSet.next();
			currentState = new CachedResultSet();
		} else {
			if (offset > 0) {
				while (resultSet.hasNext() && resultSet.getRowNumber() < offset) {
					resultSet.nextBinding();
				}				
				
				// Sanity check: if offset is greater than the available 
				// rows then the resulting ResultSet must be empty
				if (!resultSet.hasNext()) {
					currentState = new CachedResultSet();					
				}
			}
		}
	}		
}
 

public ResultSet getClassificationSchemesOfContext(String contextURI) {
	StringBuilder queryString = new StringBuilder(PREFIX_MDR)
			.append(PREFIX_RDFS).append("SELECT ?cs FROM <")
			.append(MDRDatabase.BASE_URI).append("> WHERE {")
			.append("?cs rdfs:subClassOf mdr:ClassificationScheme .")
			.append("?cs mdr:having ?aic .")
			.append("?aic mdr:administeredItemContextContext <")
			.append(contextURI).append("> . }");
	QueryExecution qexec = this.createQueryExecution(
			queryString.toString(), this.mdrDatabase.getOntModel());
	return qexec.execSelect();

}