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

Example 96 with ResultSet

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

the class FusekiBuilder method addServiceEP.

private static void addServiceEP(DataService dataService, OperationName opName, Resource svc, Property property) {
    String p = "<" + property.getURI() + ">";
    ResultSet rs = query("SELECT * { ?svc " + p + " ?ep}", svc.getModel(), "svc", svc);
    for (; rs.hasNext(); ) {
        QuerySolution soln = rs.next();
        String epName = soln.getLiteral("ep").getLexicalForm();
        Endpoint operation = new Endpoint(opName, epName);
        addServiceEP(dataService, opName, epName);
    //log.info("  " + opName.name + " = " + dataAccessPoint.getName() + "/" + epName) ;
    }
}

Example 97 with ResultSet

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

the class FusekiBuilder method getOne.

public static RDFNode getOne(Resource svc, String property) {
    String ln = property.substring(property.indexOf(':') + 1);
    ResultSet rs = FusekiLib.query("SELECT * { ?svc " + property + " ?x}", svc.getModel(), "svc", svc);
    if (!rs.hasNext())
        throw new FusekiConfigException("No " + ln + " for service " + FusekiLib.nodeLabel(svc));
    RDFNode x = rs.next().get("x");
    if (rs.hasNext())
        throw new FusekiConfigException("Multiple " + ln + " for service " + FusekiLib.nodeLabel(svc));
    return x;
}

Example 98 with ResultSet

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

the class TestEmbeddedFuseki method embedded_03.

// Different dataset name.
@Test
public void embedded_03() {
    DatasetGraph dsg = dataset();
    int port = FusekiLib.choosePort();
    FusekiEmbeddedServer server = FusekiEmbeddedServer.create().setPort(port).add("/ds1", dsg).build();
    server.start();
    try {
        // Add while live.
        Txn.executeWrite(dsg, () -> {
            Quad q = SSE.parseQuad("(_ :s :p _:b)");
            dsg.add(q);
        });
        query("http://localhost:" + port + "/ds1/query", "SELECT * { ?s ?p ?o}", qExec -> {
            ResultSet rs = qExec.execSelect();
            int x = ResultSetFormatter.consume(rs);
            assertEquals(1, x);
        });
    } finally {
        server.stop();
    }
}

Example 99 with ResultSet

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

the class TestMultipleEmbedded method multiple_03.

// Two servers, two datasets.
@Test
public void multiple_03() {
    DatasetGraph dsg1 = dataset();
    DatasetGraph dsg2 = dataset();
    // Same name.
    int port1 = FusekiLib.choosePort();
    FusekiEmbeddedServer server1 = FusekiEmbeddedServer.create().setPort(port1).add("/ds", dsg1).build().start();
    Txn.executeWrite(dsg1, () -> dsg1.add(q1));
    int port2 = FusekiLib.choosePort();
    FusekiEmbeddedServer server2 = FusekiEmbeddedServer.create().setPort(port2).add("/ds", dsg2).build().start();
    Txn.executeWrite(dsg2, () -> dsg2.add(q2));
    query("http://localhost:" + port1 + "/ds/", "SELECT * {?s ?p 1}", qExec -> {
        ResultSet rs = qExec.execSelect();
        int x = ResultSetFormatter.consume(rs);
        assertEquals(1, x);
    });
    query("http://localhost:" + port2 + "/ds/", "SELECT * {?s ?p 1}", qExec -> {
        ResultSet rs = qExec.execSelect();
        int x = ResultSetFormatter.consume(rs);
        assertEquals(0, x);
    });
    server1.stop();
    // server2 still running
    query("http://localhost:" + port2 + "/ds/", "SELECT * {?s ?p 2}", qExec -> {
        ResultSet rs = qExec.execSelect();
        int x = ResultSetFormatter.consume(rs);
        assertEquals(1, x);
    });
    server2.stop();
}

Example 100 with ResultSet

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

the class AlgebraExec method main.

public static void main(String[] argv) {
    String BASE = "http://example/";
    BasicPattern bp = new BasicPattern();
    Var var_x = Var.alloc("x");
    Var var_z = Var.alloc("z");
    // ---- Build expression
    bp.add(new Triple(var_x, NodeFactory.createURI(BASE + "p"), var_z));
    Op op = new OpBGP(bp);
    //Expr expr = ExprUtils.parse("?z < 2 ") ;
    Expr expr = new E_LessThan(new ExprVar(var_z), NodeValue.makeNodeInteger(2));
    op = OpFilter.filter(expr, op);
    // ---- Example setup
    Model m = makeModel();
    m.write(System.out, "TTL");
    System.out.println("--------------");
    System.out.print(op);
    System.out.println("--------------");
    // ---- Execute expression
    QueryIterator qIter = Algebra.exec(op, m.getGraph());
    // -------- Either read the query iterator directly ...
    if (false) {
        for (; qIter.hasNext(); ) {
            Binding b = qIter.nextBinding();
            Node n = b.get(var_x);
            System.out.println(NodeFmtLib.displayStr(n));
            System.out.println(b);
        }
        qIter.close();
    } else {
        // -------- Or make ResultSet from it (but not both - reading an
        //          iterator consumes the current solution)
        List<String> varNames = new ArrayList<>();
        varNames.add("x");
        varNames.add("z");
        ResultSet rs = new ResultSetStream(varNames, m, qIter);
        ResultSetFormatter.out(rs);
        qIter.close();
    }
    System.exit(0);
}