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

Example 76 with Dataset

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

the class TestTdbMemConnection method getConnection.

@Override
protected JenaConnection getConnection(Dataset ds) throws SQLException {
    Dataset tdb = TDBFactory.createDataset();
    TestUtils.copyDataset(ds, tdb, true);
    return new TDBConnection(tdb, ResultSet.HOLD_CURSORS_OVER_COMMIT, JenaConnection.DEFAULT_AUTO_COMMIT, JdbcCompatibility.DEFAULT);
}

Example 77 with Dataset

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

the class TestTdbDiskResultSets method results_ask_false.

/**
     * Test ASK results with a false result
     * 
     * @throws SQLException
     */
@Test
public void results_ask_false() throws SQLException {
    Dataset ds = createDataset(tempDir.getRoot().getAbsolutePath());
    try (DebugTdbConnection connection = new DebugTdbConnection(ds)) {
        Statement stmt = connection.createStatement(TYPE_FORWARD_ONLY, CONCUR_READ_ONLY);
        ResultSet rset = stmt.executeQuery("ASK { FILTER(false) }");
        assertNotNull(rset);
        assertFalse(rset.isClosed());
        assertTrue(rset.isBeforeFirst());
        // Try to move to the result row
        assertTrue(rset.next());
        // Check the boolean return value
        assertFalse(rset.getBoolean(COLUMN_LABEL_ASK));
        // Check no further rows
        assertFalse(rset.next());
        assertTrue(rset.isAfterLast());
        // Close and clean up
        rset.close();
        assertTrue(rset.isClosed());
    }
}

Example 78 with Dataset

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

the class TestTdbDiskConnection method getConnection.

@Override
protected JenaConnection getConnection(Dataset ds) throws SQLException {
    Dataset tdb = TDBFactory.createDataset(tempDir.getRoot().getAbsolutePath());
    TestUtils.copyDataset(ds, tdb, true);
    return new TDBConnection(tdb, ResultSet.HOLD_CURSORS_OVER_COMMIT, JenaConnection.DEFAULT_AUTO_COMMIT, JdbcCompatibility.DEFAULT);
}

Example 79 with Dataset

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

the class TestUtils method generateDataset.

/**
     * Generates a synthetic dataset for testing
     * 
     * @param numGraphs
     *            Number of graphs to generate
     * @param triplesPerGraph
     *            Triples per graph
     * @param createDefaultGraph
     *            Whether to generate a default graph
     * @return Synthetic dataset
     */
public static Dataset generateDataset(int numGraphs, int triplesPerGraph, boolean createDefaultGraph) {
    if (numGraphs <= 0)
        throw new IllegalArgumentException("Number of graphs must be >= 1");
    if (triplesPerGraph <= 0)
        throw new IllegalArgumentException("Number of triples per graph must be >= 1");
    Dataset ds = DatasetFactory.createTxnMem();
    if (createDefaultGraph) {
        numGraphs--;
        Model def = ModelFactory.createDefaultModel();
        for (int i = 1; i <= triplesPerGraph; i++) {
            def.add(def.createStatement(def.createResource("http://default/subject/" + i), def.createProperty("http://default/predicate"), def.createTypedLiteral(i)));
        }
        ds.setDefaultModel(def);
    }
    for (int g = 1; g < numGraphs; g++) {
        Model named = ModelFactory.createDefaultModel();
        for (int i = 1; i <= triplesPerGraph; i++) {
            named.add(named.createStatement(named.createResource("http://named/subject/" + i), named.createProperty("http://named/predicate"), named.createTypedLiteral(i)));
        }
        ds.addNamedModel("http://named/" + g, named);
    }
    return ds;
}

Example 80 with Dataset

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

the class MemDriver method connect.

@Override
protected JenaConnection connect(Properties props, int compatibilityLevel) throws SQLException {
    Object dsObj = props.get(PARAM_DATASET);
    String empty = props.getProperty(PARAM_EMPTY);
    if (dsObj == null && empty == null)
        throw new SQLException("Neither one of the " + PARAM_DATASET + " or " + PARAM_EMPTY + " connection parameters is present in the JDBC Connection URL or the provided Properties object");
    if (dsObj != null) {
        if (dsObj instanceof Dataset) {
            // Dataset provided directly
            return new MemConnection((Dataset) dsObj, JenaConnection.DEFAULT_HOLDABILITY, JenaConnection.DEFAULT_AUTO_COMMIT, JenaConnection.DEFAULT_ISOLATION_LEVEL, compatibilityLevel);
        } else {
            // Load dataset from a file
            try {
                Dataset ds = DatasetFactory.createMem();
                RDFDataMgr.read(ds, dsObj.toString());
                return new MemConnection(ds, JenaConnection.DEFAULT_HOLDABILITY, JenaConnection.DEFAULT_AUTO_COMMIT, JenaConnection.DEFAULT_ISOLATION_LEVEL, compatibilityLevel);
            } catch (Exception e) {
                throw new SQLException("Error occurred while reading from the specified RDF dataset file - " + dsObj.toString(), e);
            }
        }
    } else if (this.isTrue(props, PARAM_EMPTY)) {
        // Use an empty dataset
        return new MemConnection(DatasetFactory.createMem(), JenaConnection.DEFAULT_HOLDABILITY, JenaConnection.DEFAULT_AUTO_COMMIT, JenaConnection.DEFAULT_ISOLATION_LEVEL, compatibilityLevel);
    } else {
        throw new SQLException("Insufficient parameters to create a Jena JDBC in-memory connection, please supply a Dataset file/instance via the " + PARAM_DATASET + " parameter or supply " + PARAM_EMPTY + "=true to connect to a new empty dataset");
    }
}