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

Example 86 with Quad

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

the class ExQuadFilter method setup.

/** Example setup - in-memory dataset with two graphs, one triple in each */
private static Dataset setup() {
    Dataset ds = TDBFactory.createDataset();
    DatasetGraph dsg = ds.asDatasetGraph();
    Quad q1 = SSE.parseQuad("(<http://example/g1> <http://example/s> <http://example/p> <http://example/o1>)");
    Quad q2 = SSE.parseQuad("(<http://example/g2> <http://example/s> <http://example/p> <http://example/o2>)");
    dsg.add(q1);
    dsg.add(q2);
    return ds;
}

Example 87 with Quad

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

the class IsoMatcher method tuplesQuads.

private static List<Tuple<Node>> tuplesQuads(Iterator<Quad> iter) {
    List<Tuple<Node>> tuples = new ArrayList<>();
    for (; iter.hasNext(); ) {
        Quad q = iter.next();
        Tuple<Node> tuple = tuple(q.getGraph(), q.getSubject(), q.getPredicate(), q.getObject());
        tuples.add(tuple);
    }
    return tuples;
}

Example 88 with Quad

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

the class AbstractJenaConnectionTests method connection_statement_query_select_04.

/**
     * Runs a SELECT query on a non-empty database and checks it returns
     * non-empty results. Uses high compatibility level to ensure that column
     * type detection doesn't consume the first row.
     * 
     * @throws SQLException
     */
@Test
public void connection_statement_query_select_04() 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);
    conn.setJdbcCompatibilityLevel(JdbcCompatibility.HIGH);
    Statement stmt = conn.createStatement();
    ResultSet rset = stmt.executeQuery("SELECT * WHERE { GRAPH ?g { ?s ?p ?o } }");
    Assert.assertNotNull(rset);
    Assert.assertFalse(rset.isClosed());
    Assert.assertTrue(rset.isBeforeFirst());
    // Check result set metadata
    checkSelectMetadata(rset, 4);
    // 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 89 with Quad

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

the class AbstractJenaConnectionTests method connection_statement_query_select_02.

/**
     * 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_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("SELECT * WHERE { GRAPH ?g { ?s ?p ?o } }");
    Assert.assertNotNull(rset);
    Assert.assertFalse(rset.isClosed());
    Assert.assertTrue(rset.isBeforeFirst());
    // Check result set metadata
    checkSelectMetadata(rset, 4);
    // 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 90 with Quad

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

the class PatternTable method process.

// Start a table from the i'th quad 
// Must remove the quad at index i if return is not null.
public SqlStage process(int i, QuadBlock quadBlock) {
    QuadBlock tableQuads = new QuadBlock();
    Set<Node> predicates = new HashSet<Node>(cols.keySet());
    // Use the fact that i'th quad is the trigger  
    Quad trigger = quadBlock.get(i);
    Node subject = trigger.getSubject();
    Node graph = trigger.getGraph();
    for (Node p : predicates) {
        int idx = quadBlock.findFirst(i, graph, subject, p, null);
        if (idx < 0)
            // Liberal - any predicates
            continue;
        Quad q = quadBlock.get(idx);
        tableQuads.add(q);
    }
    quadBlock.removeAll(tableQuads);
    SqlStagePatternTable stage = new SqlStagePatternTable(graph, subject, tableQuads);
    return stage;
}