Examples with MemConnection org.apache.jena.jdbc.mem.connections.MemConnection used on opensource projects

Example 1 with MemConnection

use of org.apache.jena.jdbc.mem.connections.MemConnection 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 2 with MemConnection

use of org.apache.jena.jdbc.mem.connections.MemConnection 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");
    }
}