Examples with Quad org.apache.jena.sparql.core.Quad used on opensource projects

Example 11 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class AbstractJenaConnectionTests method connection_statement_query_describe_02.

/**
     * Runs a CONSTRUCT query on a non-empty database and checks it returns
     * non-empty results
     * 
     * @throws SQLException
     */
@Test
public void connection_statement_query_describe_02() throws SQLException {
    // Prepare a dataset
    Dataset ds = DatasetFactory.createTxnMem();
    ds.asDatasetGraph().add(new Quad(NodeFactory.createURI("http://example/graph"), NodeFactory.createURI("http://example/subject"), NodeFactory.createURI("http://example/predicate"), NodeFactory.createURI("http://example/object")));
    // Work with the connection
    JenaConnection conn = this.getConnection(ds);
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery("DESCRIBE ?s WHERE { GRAPH ?g { ?s ?p ?o } }");
    Assert.assertNotNull(rset);
    Assert.assertFalse(rset.isClosed());
    Assert.assertTrue(rset.isBeforeFirst());
    // Should have a row
    Assert.assertTrue(rset.next());
    Assert.assertTrue(rset.isFirst());
    Assert.assertEquals(1, rset.getRow());
    // Should be no further rows
    Assert.assertFalse(rset.next());
    Assert.assertTrue(rset.isAfterLast());
    Assert.assertFalse(rset.isClosed());
    // Close things
    rset.close();
    Assert.assertTrue(rset.isClosed());
    stmt.close();
    Assert.assertTrue(stmt.isClosed());
    conn.close();
    Assert.assertTrue(conn.isClosed());
}

Example 12 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class AbstractJenaConnectionTests method connection_statement_query_select_03.

/**
     * Runs a SELECT query on a non-empty database and checks it returns
     * non-empty results
     * 
     * @throws SQLException
     */
@Test
public void connection_statement_query_select_03() throws SQLException {
    // Prepare a dataset
    Dataset ds = DatasetFactory.createTxnMem();
    ds.asDatasetGraph().add(new Quad(NodeFactory.createURI("http://example/graph"), NodeFactory.createURI("http://example/subject"), NodeFactory.createURI("http://example/predicate"), NodeFactory.createURI("http://example/object")));
    // Work with the connection
    JenaConnection conn = this.getConnection(ds);
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery("SELECT DISTINCT ?g WHERE { GRAPH ?g { ?s ?p ?o } }");
    Assert.assertNotNull(rset);
    Assert.assertFalse(rset.isClosed());
    Assert.assertTrue(rset.isBeforeFirst());
    // Check result set metadata
    checkSelectMetadata(rset, 1);
    // Should have a row
    Assert.assertTrue(rset.next());
    Assert.assertTrue(rset.isFirst());
    Assert.assertEquals(1, rset.getRow());
    // Should be no further rows
    Assert.assertFalse(rset.next());
    Assert.assertTrue(rset.isAfterLast());
    Assert.assertFalse(rset.isClosed());
    // Close things
    rset.close();
    Assert.assertTrue(rset.isClosed());
    stmt.close();
    Assert.assertTrue(stmt.isClosed());
    conn.close();
    Assert.assertTrue(conn.isClosed());
}

Example 13 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class AbstractJenaConnectionTests method connection_statement_query_construct_02.

/**
     * Runs a CONSTRUCT query on a non-empty database and checks it returns
     * non-empty results
     * 
     * @throws SQLException
     */
@Test
public void connection_statement_query_construct_02() throws SQLException {
    // Prepare a dataset
    Dataset ds = DatasetFactory.createTxnMem();
    ds.asDatasetGraph().add(new Quad(NodeFactory.createURI("http://example/graph"), NodeFactory.createURI("http://example/subject"), NodeFactory.createURI("http://example/predicate"), NodeFactory.createURI("http://example/object")));
    // Work with the connection
    JenaConnection conn = this.getConnection(ds);
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery("CONSTRUCT { ?s ?p ?o } WHERE { GRAPH ?g { ?s ?p ?o } }");
    Assert.assertNotNull(rset);
    Assert.assertFalse(rset.isClosed());
    Assert.assertTrue(rset.isBeforeFirst());
    // Should have a row
    Assert.assertTrue(rset.next());
    Assert.assertTrue(rset.isFirst());
    Assert.assertEquals(1, rset.getRow());
    // Should be no further rows
    Assert.assertFalse(rset.next());
    Assert.assertTrue(rset.isAfterLast());
    Assert.assertFalse(rset.isClosed());
    // Close things
    rset.close();
    Assert.assertTrue(rset.isClosed());
    stmt.close();
    Assert.assertTrue(stmt.isClosed());
    conn.close();
    Assert.assertTrue(conn.isClosed());
}

Example 14 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class SlotCompilerIndex method classify.

protected void classify(QuadBlock quadBlock, Collection<Node> constants, Collection<Var> vars) {
    for (Quad quad : quadBlock) {
        // Some constants are only markers and are not stored in the database.
        if (// quad.isDefaultGraph ARQ 2.8.4 and later
        !Quad.isDefaultGraph(quad.getGraph()) && !quad.isUnionGraph())
            acc(constants, vars, quad.getGraph());
        acc(constants, vars, quad.getSubject());
        acc(constants, vars, quad.getPredicate());
        acc(constants, vars, quad.getObject());
    }
}

Example 15 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class T_QuadsObjectIsNull method one.

public static void one() {
    Quad q1 = SSE.parseQuad("(<g1> <s1> <p1> '1')");
    Quad q2 = SSE.parseQuad("(<g2> <s2> <p2> '2')");
    Quad q3 = SSE.parseQuad("(<g3> <s3> <p3> '3')");
    DatasetGraphTransaction dsg = (DatasetGraphTransaction) TDBFactory.createDatasetGraph(location);
    System.out.println("Start");
    dump(dsg);
    write(dsg, q1);
    write(dsg, q2);
    //write(dsg, q3) ;
    System.out.println("Finish");
    dump(dsg);
}