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

Example 91 with QuerySolution

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

the class TestTextMultilingualEnhancements method doTestSearchWithLiterals.

protected Map<String, Literal> doTestSearchWithLiterals(String queryString, Set<String> expectedEntityURIs) {
    Map<String, Literal> literals = new HashMap<>();
    Query query = QueryFactory.create(queryString);
    dataset.begin(ReadWrite.READ);
    try (QueryExecution qexec = QueryExecutionFactory.create(query, dataset)) {
        ResultSet results = qexec.execSelect();
        assertEquals(expectedEntityURIs.size() > 0, results.hasNext());
        int count;
        for (count = 0; results.hasNext(); count++) {
            QuerySolution soln = results.nextSolution();
            String entityUri = soln.getResource("s").getURI();
            assertTrue(expectedEntityURIs.contains(entityUri));
            Literal literal = soln.getLiteral("lit");
            assertNotNull(literal);
            literals.put(entityUri, literal);
        }
        assertEquals(expectedEntityURIs.size(), count);
    } finally {
        dataset.end();
    }
    return literals;
}

Example 92 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 93 with QuerySolution

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

the class SelectBuilderTest method testVarReplacementInSubQuery.

@Test
public void testVarReplacementInSubQuery() 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("?p").addWhere("?x", "?p", "?o").addFilter("?o < ?limit");
    builder.addPrefix("xsd", XSD.getURI()).addVar("?x").addVar("count(?p)", "?c").addWhere("?x", "?p", "?o2").addSubQuery(sb).addGroupBy("?x");
    builder.setVar("?limit", 4);
    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("c"));
        if ("urn:one".equals(soln.get("?x").asResource().getURI())) {
            assertEquals(2, soln.get("?c").asLiteral().getInt());
        } else {
            assertEquals(1, soln.get("?c").asLiteral().getInt());
        }
    }
}

Example 94 with QuerySolution

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

the class FusekiConfig method readSystemDatabase.

// ---- System database
/**
 * Read the system database
 */
public static List<DataAccessPoint> readSystemDatabase(Dataset ds) {
    // Webapp only.
    DatasetDescriptionMap dsDescMap = new DatasetDescriptionMap();
    String qs = StrUtils.strjoinNL(FusekiPrefixes.PREFIXES, "SELECT * {", "  GRAPH ?g {", "     ?s fu:name ?name;", "        fu:status ?status .", "  }", "}");
    List<DataAccessPoint> refs = new ArrayList<>();
    ds.begin(ReadWrite.WRITE);
    try {
        ResultSet rs = BuildLib.query(qs, ds);
        for (; rs.hasNext(); ) {
            QuerySolution row = rs.next();
            Resource s = row.getResource("s");
            Resource g = row.getResource("g");
            Resource rStatus = row.getResource("status");
            // String name = row.getLiteral("name").getLexicalForm();
            DataServiceStatus status = DataServiceStatus.status(rStatus);
            Model m = ds.getNamedModel(g.getURI());
            // Rebase the resource of the service description to the containing graph.
            Resource svc = m.wrapAsResource(s.asNode());
            DataAccessPoint ref = buildDataAccessPoint(svc, dsDescMap);
            if (ref != null)
                refs.add(ref);
        }
        ds.commit();
        return refs;
    } catch (Throwable th) {
        th.printStackTrace();
        return refs;
    } finally {
        ds.end();
    }
}

Example 95 with QuerySolution

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

the class FusekiConfig method accEndpointOldStyle.

// Old style.
// fuseki:serviceQuery "sparql";
// or
// fuseki:serviceQuery [ fuseki:name "sparql" ; fuseki:allowedUsers (..) ];
private static void accEndpointOldStyle(Collection<Endpoint> endpoints, Operation operation, Resource svc, Property property) {
    String p = "<" + property.getURI() + ">";
    ResultSet rs = BuildLib.query("SELECT * { ?svc " + p + " ?ep}", svc.getModel(), "svc", svc);
    for (; rs.hasNext(); ) {
        QuerySolution soln = rs.next();
        // No policy yet - set below if one is found.
        AuthPolicy authPolicy = null;
        RDFNode ep = soln.get("ep");
        String endpointName = null;
        if (ep.isLiteral())
            // fuseki:serviceQuery "sparql"
            endpointName = soln.getLiteral("ep").getLexicalForm();
        else if (ep.isResource()) {
            Resource r = (Resource) ep;
            try {
                // [ fuseki:name ""; fuseki:allowedUsers ( "" "" ) ]
                Statement stmt = r.getProperty(FusekiVocab.pEndpointName);
                if (stmt == null)
                    throw new FusekiConfigException("Expected property <" + FusekiVocab.pEndpointName + "> with <" + property.getURI() + "> for <" + svc + ">");
                endpointName = stmt.getString();
                List<RDFNode> x = GraphUtils.multiValue(r, FusekiVocab.pAllowedUsers);
                if (x.size() > 1)
                    throw new FusekiConfigException("Multiple fuseki:" + FusekiVocab.pAllowedUsers.getLocalName() + " for " + r);
                if (!x.isEmpty())
                    authPolicy = allowedUsers(r);
            } catch (JenaException | ClassCastException ex) {
                throw new FusekiConfigException("Failed to parse endpoint: " + r);
            }
        } else {
            throw new FusekiConfigException("Unrecognized: " + ep);
        }
        if (StringUtils.isEmpty(endpointName))
            endpointName = null;
        Endpoint endpoint = Endpoint.create(operation, endpointName, authPolicy);
        endpoints.add(endpoint);
    }
}