Examples with SailConnection org.openrdf.sail.SailConnection used on opensource projects

Example 26 with SailConnection

use of org.openrdf.sail.SailConnection in project blueprints by tinkerpop.

the class SailGraph method loadRDF.

/**
     * Load RDF data into the SailGraph. Supported formats include rdf-xml, n-triples, turtle, n3, trix, or trig.
     * Before loading data, the current transaction is successfully committed.
     *
     * @param input       The InputStream of RDF data.
     * @param baseURI     The baseURI for RDF data.
     * @param rdfParser   The {@link RDFParser} to use. It's {@link RDFHandler} will be
     *                    changed to an internal one. The main purpose of this is to use
     *                    a custom {@link ValueFactory}. It is recommended to use
     *                    <code>Rio.createParser(getFormat(format))</code> and set the
     *                    {@link ValueFactory} of the parser to something that
     *                    <code>extends</code> the {@link ValueFactory} of the
     *                    {@link Sail} used to initialize this class.
     *                    <p>
     *                    For example, <code>extend {@link ValueFactoryImpl}</code> if
     *                    you used a <code>GraphSail</code> to initialize this class.
     * @param baseGraph   The baseGraph to insert the data into.  May be null, in which case data is added to the default graph.
     * @param rdfHandlers Any number of {@link RDFHandler}s into which to pass parsed RDF statements <b>after</b>
     *                    they have been added to the graph.
     *                    These may be used, for example, for implementing your own logging.
     *                    Can be <code>null</code> if you only want to use the default
     *                    {@link RDFHandler} created internally.
     */
public void loadRDF(final InputStream input, final String baseURI, final RDFParser rdfParser, final String baseGraph, final RDFHandler... rdfHandlers) {
    try {
        this.commit();
        final SailConnection c = this.rawGraph.getConnection();
        try {
            c.begin();
            RDFHandler h = null == baseGraph ? new SailAdder(c) : new SailAdder(c, new URIImpl(baseGraph));
            if (rdfHandlers != null) {
                RDFHandler[] handlers = new RDFHandler[rdfHandlers.length + 1];
                handlers[0] = h;
                System.arraycopy(rdfHandlers, 0, handlers, 1, rdfHandlers.length);
                h = new RDFHandlerWrapper(handlers);
            }
            rdfParser.setRDFHandler(h);
            rdfParser.parse(input, baseURI);
            c.commit();
        } finally {
            c.rollback();
            c.close();
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Example 27 with SailConnection

use of org.openrdf.sail.SailConnection in project blueprints by tinkerpop.

the class SailGraph method closeAllConnections.

private void closeAllConnections() throws SailException {
    for (SailConnection sc : connections) {
        if (null != sc) {
            if (sc.isOpen()) {
                sc.rollback();
                sc.close();
            }
        }
    }
}

Example 28 with SailConnection

use of org.openrdf.sail.SailConnection in project blueprints by tinkerpop.

the class SailLoader method load.

/**
     * Loads an RDF file, or a directory containing RDF files, into a Sail
     *
     * @param fileOrDirectory a file in a supported RDF format or a directory which contains (at any level)
     *                        one or more files in a supported RDF format.
     *                        A directory should contain all or mostly RDF files.
     *                        Files must be named with a format-appropriate extension, e.g. *.rdf, *.ttl, *.nt
     *                        or a format-appropriate extension followed by .gz if they are compressed with Gzip.
     */
public synchronized void load(final File fileOrDirectory) throws Exception {
    LOGGER.info("loading from " + fileOrDirectory);
    SailConnection c = sail.getConnection();
    try {
        c.begin();
        long startTime = System.currentTimeMillis();
        long count = loadFile(fileOrDirectory, c);
        // commit leftover statements
        c.commit();
        long endTime = System.currentTimeMillis();
        LOGGER.info("loaded " + count + " statements in " + (endTime - startTime) + "ms");
    } finally {
        c.rollback();
        c.close();
    }
}

Example 29 with SailConnection

use of org.openrdf.sail.SailConnection in project blueprints by tinkerpop.

the class SailTest method testSetNamespace.

@Test
public void testSetNamespace() throws Exception {
    SailConnection sc = sail.getConnection();
    try {
        sc.begin();
        String prefix = "foo";
        String emptyPrefix = "";
        String name = "http://example.org/foo";
        String otherName = "http://example.org/bar";
        sc.removeNamespace(prefix);
        sc.removeNamespace(emptyPrefix);
        sc.commit();
        sc.begin();
        // Namespace initially absent?
        assertNull(sc.getNamespace(prefix));
        assertNull(sc.getNamespace(emptyPrefix));
        // Can we set the namespace?
        sc.setNamespace(prefix, name);
        sc.commit();
        sc.begin();
        assertEquals(sc.getNamespace(prefix), name);
        // Can we reset the namespace?
        sc.setNamespace(prefix, otherName);
        sc.commit();
        sc.begin();
        assertEquals(sc.getNamespace(prefix), otherName);
        // Can we use an empty namespace prefix?
        sc.setNamespace(emptyPrefix, name);
        sc.commit();
        sc.begin();
        assertEquals(sc.getNamespace(emptyPrefix), name);
    } finally {
        sc.rollback();
        sc.close();
    }
}

Example 30 with SailConnection

use of org.openrdf.sail.SailConnection in project blueprints by tinkerpop.

the class SailTest method testBlankNodes.

// blank nodes /////////////////////////////////////////////////////////////
@Test
public void testBlankNodes() throws Throwable {
    URI uriA = sail.getValueFactory().createURI("http://example.org/test/S_POG#a");
    URI uriB = sail.getValueFactory().createURI("http://example.org/test/S_POG#b");
    SailConnection sc = sail.getConnection();
    try {
        sc.begin();
        ValueFactory factory = sail.getValueFactory();
        BNode bNode = factory.createBNode();
        try {
            sc.addStatement(uriA, uriA, bNode);
        } catch (SailException se) {
            // FIXME: not supporting blank nodes ATM
            assertTrue(se.getCause() instanceof UnsupportedOperationException);
        }
        sc.commit();
    } finally {
        sc.rollback();
        sc.close();
    }
}