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

Example 21 with QuerySolution

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

the class SelectBuilderTest method testAggregatorsInSubQuery.

@Test
public void testAggregatorsInSubQuery() throws ParseException {
    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(2));
    m.add(r, m.getProperty("urn:p:two"), m.createTypedLiteral(4));
    m.add(r, m.getProperty("urn:p:three"), m.createTypedLiteral(6));
    SelectBuilder sb = new SelectBuilder().addVar("?x").addVar("max(?o)", "?max").addWhere("?x", "?p", "?o").addGroupBy("?x");
    builder.addPrefix("xsd", XSD.getURI()).addVar("?x").addVar("min(?o2)", "?min").addWhere("?x", "?p2", "?o2").addSubQuery(sb).addFilter("?max = '6'^^xsd:int").addGroupBy("?x");
    QueryExecution qexec = QueryExecutionFactory.create(builder.build(), m);
    ResultSet results = qexec.execSelect();
    assertTrue(results.hasNext());
    for (; results.hasNext(); ) {
        QuerySolution soln = results.nextSolution();
        assertTrue(soln.contains("x"));
        assertTrue(soln.contains("min"));
        assertEquals("urn:two", soln.get("?x").asResource().getURI());
        assertEquals(2, soln.get("?min").asLiteral().getInt());
    }
}

Example 22 with QuerySolution

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

the class JenaOSGITest method runQuery.

private void runQuery(Dataset dataset) {
    Query query = QueryFactory.create("" + "PREFIX foaf: <http://xmlns.com/foaf/0.1/>" + "SELECT ?bob WHERE { " + "  GRAPH <http://example.com/graph> { " + "      ?alice foaf:knows ?bob . " + "  }" + "}");
    try (QueryExecution qexec = QueryExecutionFactory.create(query, dataset)) {
        ResultSet results = qexec.execSelect();
        assertTrue(results.hasNext());
        QuerySolution r = results.next();
        assertEquals(bob, r.get("bob").asResource());
    }
}

Example 23 with QuerySolution

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

the class TestDatasetWithLuceneStoredLiterals method doTestSearchWithLiteralsMultiple.

protected List<Node> doTestSearchWithLiteralsMultiple(String turtle, String queryString, String expectedEntityURI) {
    List<Node> literals = new LinkedList<>();
    Model model = dataset.getDefaultModel();
    Reader reader = new StringReader(turtle);
    dataset.begin(ReadWrite.WRITE);
    model.read(reader, "", "TURTLE");
    dataset.commit();
    Query query = QueryFactory.create(queryString);
    dataset.begin(ReadWrite.READ);
    try (QueryExecution qexec = QueryExecutionFactory.create(query, dataset)) {
        ResultSet results = qexec.execSelect();
        int count;
        for (count = 0; results.hasNext(); count++) {
            QuerySolution soln = results.nextSolution();
            String entityURI = soln.getResource("s").getURI();
            assertEquals(expectedEntityURI, entityURI);
            Literal literal = soln.getLiteral("literal");
            assertNotNull(literal);
            literals.add(literal.asNode());
        }
    } finally {
        dataset.end();
    }
    return literals;
}