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%VOSWARNING% %META:TOPICPARENT{name="VirtJenaProvider"}% ---+ Virtuoso Jena Provider - SPARQL Example 14 <verbatim> import org.apache.jena.query.*; import org.apache.jena.ontology.*; import org.apache.jena.rdf.model.*; import org.apache.jena.reasoner.ReasonerRegistry; import org.apache.jena.util.PrintUtil; import org.apache.jena.vocabulary.RDFS; /** import org.apache.jena.query.*; import org.apache.jena.graph.Triple; import org.apache.jena.graph.Node; import org.apache.jena.graph.Graph; import org.apache.jena.graph.*; import org.apache.jena.rdf.model.*; import org.apache.jena.rdf.model.RDFNode; import org.apache.jena.vocabulary.RDFS; **/ import virtuoso.jena.driver.*; public class VirtuosoSPARQLExample14 { static String URL = "jdbc:virtuoso://localhost:1111"; static final String uid = "dba"; static final String pwd = "dba"; public static void print_model(String header, Model m) { String h = header==null?"Model":header; System.out.println("===========["+h+"]=========="); StmtIterator it = m.listStatements((Resource)null, (Property)null, (RDFNode)null); while(it.hasNext()) { Statement st = it.nextStatement(); System.out.println(st); } System.out.println("============================\n"); } public static void print_model(String header, StmtIterator it) { String h = header==null?"Model iterator":header; System.out.println("===========["+h+"]=========="); while(it.hasNext()) { Statement st = it.nextStatement(); System.out.println(st); } System.out.println("============================\n"); } public static void exec_select(String header, Model m, String query) { String h = header==null?"":header; System.out.println("===========["+h+"]=========="); System.out.println("Exec: "+ query); Query jquery = QueryFactory.create(query) ; QueryExecution qexec = QueryExecutionFactory.create(jquery, m) ; ResultSet results = qexec.execSelect(); ResultSetFormatter.out(System.out, results, jquery); qexec.close(); System.out.println("============================\n"); } public static void main(String[] args) { if (args.length != 0) URL = args[0]; try { test1(); test2(); test3(); test4(); } catch (Exception e) { System.out.println("ERROR Test Failed."); e.printStackTrace(); } } public static void test1() { try { System.out.println("--------------- TEST 1 -------------------"); VirtModel vdata = VirtModel.openDatabaseModel("test:inf1", URL, uid, pwd); vdata.removeAll(); String NS = PrintUtil.egNS; Resource c1 = vdata.createResource(NS + "C1"); Resource c2 = vdata.createResource(NS + "C2"); Resource c3 = vdata.createResource(NS + "C3"); vdata.add(c2, RDFS.subClassOf, c3); InfModel im = ModelFactory.createInfModel(ReasonerRegistry.getRDFSReasoner(), vdata); print_model("Data in DB", vdata); print_model("Data in Inferenced Model", im); Model premise = ModelFactory.createDefaultModel(); premise.add(c1, RDFS.subClassOf, c2); print_model("Test listStatements",im.listStatements(c1, RDFS.subClassOf, null, premise)); } catch (Exception e) { System.out.println("ERROR Test Failed."); e.printStackTrace(); } } public static void test2() { try { System.out.println("--------------- TEST 2 -------------------"); VirtModel vdata = VirtModel.openDatabaseModel("test:inf2", URL, uid, pwd); vdata.removeAll(); String NS = PrintUtil.egNS; Resource c1 = vdata.createResource(NS + "C1"); Resource c2 = vdata.createResource(NS + "C2"); Resource c3 = vdata.createResource(NS + "C3"); vdata.add(c2, RDFS.subClassOf, c3); OntModel om = ModelFactory.createOntologyModel(OntModelSpec.RDFS_MEM_RDFS_INF, vdata); print_model("Data in DB", vdata); print_model("Data in Ontology Model", om); Model premise = ModelFactory.createDefaultModel(); premise.add(c1, RDFS.subClassOf, c2); print_model("Test listStatements",om.listStatements(c1, RDFS.subClassOf, null, premise)); } catch (Exception e) { System.out.println("ERROR Test Failed."); e.printStackTrace(); } } public static void test3() { try { System.out.println("--------------- TEST 3 -------------------"); VirtModel vdata = VirtModel.openDatabaseModel("test:inf3", URL, uid, pwd); vdata.removeAll(); String NS = PrintUtil.egNS; Resource c1 = vdata.createResource(NS + "C1"); Resource c2 = vdata.createResource(NS + "C2"); Resource c3 = vdata.createResource(NS + "C3"); vdata.add(c2, RDFS.subClassOf, c3); vdata.add(c1, RDFS.subClassOf, c2); InfModel im = ModelFactory.createInfModel(ReasonerRegistry.getRDFSReasoner(), vdata); exec_select("Data in DB", vdata, "select * where {?s ?p ?o}"); exec_select("Data in Inferenced Model", im, "select * where {?s ?p ?o}"); exec_select("Data in Inferenced Model", im, "select * where {<"+c1+"> <"+RDFS.subClassOf+"> ?o}"); } catch (Exception e) { System.out.println("ERROR Test Failed."); e.printStackTrace(); } } public static void test4() { try { System.out.println("--------------- TEST 4 -------------------"); VirtModel vdata = VirtModel.openDatabaseModel("test:inf4", URL, uid, pwd); vdata.removeAll(); String NS = PrintUtil.egNS; Resource c1 = vdata.createResource(NS + "C1"); Resource c2 = vdata.createResource(NS + "C2"); Resource c3 = vdata.createResource(NS + "C3"); vdata.add(c2, RDFS.subClassOf, c3); vdata.add(c1, RDFS.subClassOf, c2); OntModel om = ModelFactory.createOntologyModel(OntModelSpec.RDFS_MEM_RDFS_INF, vdata); exec_select("Data in DB", vdata, "select * where {?s ?p ?o}"); exec_select("Data in Ontology Model", om, "select * where {?s ?p ?o}"); exec_select("Data in Ontology", om, "select * where {<"+c1+"> <"+RDFS.subClassOf+"> ?o}"); } catch (Exception e) { System.out.println("ERROR Test Failed."); e.printStackTrace(); } } } </verbatim>

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