Examples with QuerySolution org.apache.jena.query.QuerySolution used on opensource projects

Example 51 with QuerySolution

use of org.apache.jena.query.QuerySolution in project jena by apache.

the class NearbyFFTest method testExec_query.

/**
 * Test of exec method, of class NearbyFF.
 */
@Test
public void testExec_query() {
    Dataset dataset = SpatialIndexTestData.createTestDataset();
    String query = "PREFIX spatialF: <http://jena.apache.org/function/spatial#>\n" + "\n" + "SELECT ?result\n" + "WHERE{\n" + "    BIND( \"<http://www.opengis.net/def/crs/EPSG/0/4326> POINT(51.50853 -0.12574)\"^^<http://www.opengis.net/ont/geosparql#wktLiteral> AS ?geom1)" + "    BIND( \"<http://www.opengis.net/def/crs/EPSG/0/4326> POINT(48.857487 2.373047)\"^^<http://www.opengis.net/ont/geosparql#wktLiteral> AS ?geom2)" + "    BIND( spatialF:nearby(?geom1, ?geom2, 345, <http://www.opengis.net/def/uom/OGC/1.0/kilometer>) AS ?result) \n" + "}ORDER by ?result";
    List<Literal> results = new ArrayList<>();
    try (QueryExecution qe = QueryExecutionFactory.create(query, dataset)) {
        ResultSet rs = qe.execSelect();
        while (rs.hasNext()) {
            QuerySolution qs = rs.nextSolution();
            Literal result = qs.getLiteral("result");
            results.add(result);
        }
    }
    List<Literal> expResults = Arrays.asList(ResourceFactory.createTypedLiteral(Boolean.TRUE.toString(), XSDDatatype.XSDboolean));
    // 
    // 
    assertEquals(expResults, results);
}

Example 52 with QuerySolution

use of org.apache.jena.query.QuerySolution in project jena by apache.

the class ExTDB5 method main.

public static void main(String... argv) {
    // Direct way: Make a TDB-back Jena model in the named directory.
    String directory = "MyDatabases/DB1";
    Dataset dataset = TDBFactory.createDataset(directory);
    // Potentially expensive query.
    String sparqlQueryString = "SELECT (count(*) AS ?count) { ?s ?p ?o }";
    // See http://incubator.apache.org/jena/documentation/query/app_api.html
    Query query = QueryFactory.create(sparqlQueryString);
    try (QueryExecution qexec = QueryExecutionFactory.create(query, dataset)) {
        ResultSet results = qexec.execSelect();
        for (; results.hasNext(); ) {
            QuerySolution soln = results.nextSolution();
            int count = soln.getLiteral("count").getInt();
            System.out.println("count = " + count);
        }
    }
}

Example 53 with QuerySolution

use of org.apache.jena.query.QuerySolution in project jena by apache.

the class SelectBuilderTest method testAggregatorsInSelect.

@Test
public void testAggregatorsInSelect() throws ParseException {
    builder.addVar("?x").addVar("count(*)", "?c").addWhere("?x", "?p", "?o").addGroupBy("?x");
    Model m = ModelFactory.createDefaultModel();
    Resource r = m.createResource("urn:one");
    m.add(r, m.getProperty("urn:p:one"), m.createTypedLiteral(1));
    m.add(r, m.getProperty("urn:p:two"), m.createTypedLiteral(3));
    m.add(r, m.getProperty("urn:p:three"), m.createTypedLiteral(5));
    r = m.createResource("urn:two");
    m.add(r, m.getProperty("urn:p:one"), m.createTypedLiteral(1));
    m.add(r, m.getProperty("urn:p:two"), m.createTypedLiteral(3));
    m.add(r, m.getProperty("urn:p:three"), m.createTypedLiteral(5));
    QueryExecution qexec = QueryExecutionFactory.create(builder.build(), m);
    ResultSet results = qexec.execSelect();
    assertTrue(results.hasNext());
    for (; results.hasNext(); ) {
        QuerySolution soln = results.nextSolution();
        assertTrue(soln.contains("c"));
        assertTrue(soln.contains("x"));
        assertEquals(3, soln.get("c").asLiteral().getInt());
    }
    builder.addVar("min(?o)", "?min").addVar("max(?o)", "?max");
    qexec = QueryExecutionFactory.create(builder.build(), m);
    results = qexec.execSelect();
    assertTrue(results.hasNext());
    for (; results.hasNext(); ) {
        QuerySolution soln = results.nextSolution();
        assertTrue(soln.contains("c"));
        assertTrue(soln.contains("x"));
        assertTrue(soln.contains("?min"));
        assertEquals(3, soln.get("c").asLiteral().getInt());
        assertEquals(1, soln.get("min").asLiteral().getInt());
        assertEquals(5, soln.get("max").asLiteral().getInt());
    }
}

Example 54 with QuerySolution

use of org.apache.jena.query.QuerySolution in project jena by apache.

the class FusekiConfig method servicesAndDatasets$.

private static List<DataAccessPoint> servicesAndDatasets$(Resource server, Model model) {
    DatasetDescriptionMap dsDescMap = new DatasetDescriptionMap();
    // ---- Services
    // Server to services.
    ResultSet rs = BuildLib.query("SELECT * { ?s fu:services [ list:member ?service ] }", model, "s", server);
    List<DataAccessPoint> accessPoints = new ArrayList<>();
    // If none, look for services by type.
    if (!rs.hasNext())
        // No "fu:services ( .... )" so try looking for services directly.
        // This means Fuseki2, service configuration files (no server section) work for --conf.
        rs = BuildLib.query("SELECT ?service { ?service a fu:Service }", model);
    // rs is a result set of services to process.
    for (; rs.hasNext(); ) {
        QuerySolution soln = rs.next();
        Resource svc = soln.getResource("service");
        DataAccessPoint acc = buildDataAccessPoint(svc, dsDescMap);
        if (acc != null)
            accessPoints.add(acc);
    }
    return accessPoints;
}

Example 55 with QuerySolution

use of org.apache.jena.query.QuerySolution in project jena by apache.

the class TestSecurityFilterFuseki method query.

private Set<Node> query(String user, String password, String queryString) {
    Set<Node> results = new HashSet<>();
    try (RDFConnection conn = RDFConnection.connectPW(baseUrl, user, password)) {
        conn.queryResultSet(queryString, rs -> {
            List<QuerySolution> list = Iter.toList(rs);
            list.stream().map(qs -> qs.get("s")).filter(Objects::nonNull).map(RDFNode::asNode).forEach(n -> results.add(n));
        });
    }
    return results;
}