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

Example 56 with Dataset

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

the class TestDatasetConnectionMetadata method getConnection.

@Override
protected JenaConnection getConnection() throws SQLException {
    Dataset ds = supportsSerializable ? DatasetFactory.createTxnMem() : DatasetFactory.create();
    int transactionLevelSupported = supportsSerializable ? JenaConnection.TRANSACTION_SERIALIZABLE : JenaConnection.TRANSACTION_NONE;
    return new MemConnection(ds, JenaConnection.DEFAULT_HOLDABILITY, JenaConnection.DEFAULT_AUTO_COMMIT, transactionLevelSupported, JdbcCompatibility.DEFAULT);
}

Example 57 with Dataset

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

the class TDBDriver method connect.

@Override
protected JenaConnection connect(Properties props, int compatibilityLevel) throws SQLException {
    String location = props.getProperty(PARAM_LOCATION);
    if (location == null)
        throw new SQLException("Required connection parameter " + PARAM_LOCATION + " is not present in the connection URL or the provided Properties object");
    // Determine location
    boolean useMem = this.isSetToValue(props, PARAM_LOCATION, LOCATION_MEM);
    File loc = new File(location);
    if (useMem) {
        LOGGER.warn("TDB Driver connection string specifies use of a pure in-memory dataset, this is not recommended for anything other than basic testing");
    } else {
        if (!loc.isAbsolute()) {
            LOGGER.warn("TDB Driver connection string specifies location " + loc.getAbsolutePath() + ", if this was not the expected location consider using an absolute instead of a relative path");
        } else {
            LOGGER.info("TDB Driver connection string specifies location " + loc.getAbsolutePath());
        }
    }
    // Validate location if required
    if (this.isTrue(props, PARAM_MUST_EXIST) && !useMem) {
        if (!loc.exists()) {
            throw new SQLException("TDB Driver connection string specifies location " + loc.getAbsolutePath() + " which does not exist, correct the " + PARAM_LOCATION + " parameter or set the " + PARAM_MUST_EXIST + " parameter to false");
        } else if (!loc.isDirectory()) {
            throw new SQLException("TDB Driver connection string specifies location " + loc.getAbsolutePath() + " which is not a directory, correct the " + PARAM_LOCATION + " parameter or set the " + PARAM_MUST_EXIST + " parameter to false");
        }
    }
    // Open the TDB dataset
    try {
        Dataset tdb = useMem ? TDBFactory.createDataset() : TDBFactory.createDataset(location);
        // Return a new connection for the TDB dataset
        return new TDBConnection(tdb, ResultSet.HOLD_CURSORS_OVER_COMMIT, true, compatibilityLevel);
    } catch (SQLException e) {
        throw e;
    } catch (Exception e) {
        throw new SQLException("Unexpected error establishing TDB driver connection, see inner exception for details", e);
    }
}

Example 58 with Dataset

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

the class TestTdbDiskResultSets method results_ask_true.

/**
     * Test ASK results with a true result
     * 
     * @throws SQLException
     */
@Test
public void results_ask_true() 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 { }");
        assertNotNull(rset);
        assertFalse(rset.isClosed());
        assertTrue(rset.isBeforeFirst());
        // Try to move to the result row
        assertTrue(rset.next());
        // Check the boolean return value
        assertTrue(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 59 with Dataset

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

the class TestTdbMemResultSets method prepareDataset.

@Override
protected Dataset prepareDataset(Dataset ds) {
    if (currDataset != null) {
        currDataset.close();
    }
    Dataset tdb = TDBFactory.createDataset();
    TestUtils.copyDataset(ds, tdb, true);
    currDataset = tdb;
    return tdb;
}

Example 60 with Dataset

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

the class AbstractStoreConnections method store_7.

@Test
public void store_7() {
    // No transaction, plain update, then transaction.
    // This tests that the dataset is sync'ed when going into transactional mode.
    boolean nonTxnData = true;
    StoreConnection sConn = getStoreConnection();
    Location loc = sConn.getLocation();
    DatasetGraph dsg = sConn.getBaseDataset();
    if (nonTxnData) {
        dsg.add(q);
        TDB.sync(dsg);
        assertTrue(dsg.contains(q));
    }
    DatasetGraphTxn dsgTxn = sConn.begin(ReadWrite.WRITE);
    if (nonTxnData)
        assertTrue(dsgTxn.contains(q));
    dsgTxn.add(q1);
    assertTrue(dsgTxn.contains(q1));
    if (nonTxnData)
        assertTrue(dsgTxn.contains(q));
    dsgTxn.commit();
    dsgTxn.end();
    // Should have flushed to disk.
    if (nonTxnData) {
        sConn.forceRecoverFromJournal();
        assertTrue(dsg.contains(q));
    }
    assertTrue(dsg.contains(q1));
    // release via the transactional machinery
    StoreConnection.release(loc);
    sConn = null;
    StoreConnection sConn2 = StoreConnection.make(loc);
    DatasetGraph dsg2 = sConn2.getBaseDataset();
    if (nonTxnData)
        assertTrue(dsg2.contains(q));
    assertTrue(dsg2.contains(q1));
    DatasetGraphTxn dsgTxn2 = sConn2.begin(ReadWrite.READ);
    if (nonTxnData)
        assertTrue(dsgTxn2.contains(q));
    assertTrue(dsgTxn2.contains(q1));
    dsgTxn2.end();
    // Check API methods work.
    Dataset ds = TDBFactory.createDataset(loc);
    ds.begin(ReadWrite.READ);
    Model m = (q.isDefaultGraph() ? ds.getDefaultModel() : ds.getNamedModel("g"));
    assertEquals(nonTxnData ? 2 : 1, m.size());
    ds.end();
}