Ejemplo n.º 1
0
  public static void main(String... argv) {
    String queryString = "SELECT * { ?s ?p ?o }";
    Query query = QueryFactory.create(queryString);
    Store store = SDBFactory.connectStore("sdb.ttl");

    // Must be a DatasetStore to trigger the SDB query engine.
    // Creating a graph from the Store, and adding it to a general
    // purpose dataset will not necesarily exploit full SQL generation.
    // The right answers will be obtained but slowly.

    Dataset ds = DatasetStore.create(store);
    QueryExecution qe = QueryExecutionFactory.create(query, ds);
    try {
      ResultSet rs = qe.execSelect();
      ResultSetFormatter.out(rs);
    } finally {
      qe.close();
    }

    // Close the SDB conenction which also closes the underlying JDBC connection.
    store.getConnection().close();
    store.close();
  }
Ejemplo n.º 2
0
  public static void main(String[] args) {
    try {
      Model schema = null;
      Store store = null;
      SDBConnection conn = null;
      if (args.length == 1) {
        store = ExtendedSDBFactory.connectStore(args[0]);
        store.getTableFormatter().create();
        schema = ExtendedSDBFactory.connectPagedDefaultModel(store);
      } else {
        StoreDesc storeDesc = new StoreDesc(args[0], args[1]);
        Class.forName(args[2]);
        String jdbcURL = args[3] + args[4];
        conn = new SDBConnection(jdbcURL, args[5], args[6]);
        store = ExtendedSDBFactory.connectStore(conn, storeDesc);
        store.getTableFormatter().create();
        schema = ExtendedSDBFactory.connectPagedNamedModel(store, args[7]);
      }

      long startTime = System.currentTimeMillis(), endTime = 0L, count = 0L;
      schema.read("http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl");

      OntModel m = ExtendedModelFactory.createOntologyModel(PelletReasonerFactory.THE_SPEC, schema);
      String sInputDirectory = args[8];
      File inputDirectory = new File(sInputDirectory);
      String[] sFilenames = inputDirectory.list(new OWLFilenameFilter());
      for (int i = 0; i < sFilenames.length; i++) {
        InputStream in = FileManager.get().open(sInputDirectory + sFilenames[i]);
        if (in == null) {
          throw new IllegalArgumentException("File: " + sFilenames[i] + " not found");
        }
        m.read(in, "http://www.utdallas.edu/benchmark-test#", "RDF/XML-ABBREV");
        in.close();
      }
      endTime = System.currentTimeMillis();
      System.out.println("time to read the model = " + (endTime - startTime) / 1000 + " seconds.");

      startTime = System.currentTimeMillis();
      String queryString =
          " PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> "
              + " PREFIX ub: <http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#> "
              + " SELECT * WHERE "
              + " {	"
              + "		?x rdf:type ub:GraduateStudent . "
              + "		?x ub:takesCourse <http://www.Department0.University0.edu/GraduateCourse0> . "
              + " }";

      Query query = QueryFactory.create(queryString);
      QueryExecution qexec = QueryExecutionFactory.create(query, m);
      ResultSet rs = qexec.execSelect();
      while (rs.hasNext()) {
        count++;
        rs.nextSolution();
      }
      qexec.close();
      endTime = System.currentTimeMillis();
      System.out.println("count = " + count);
      System.out.println("time to query = " + (endTime - startTime) + " milliseconds.");

      store.close();
      conn.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }