Java Code Examples for org.openrdf.repository.Repository#getValueFactory()

/**
 * Get all statements and export them as RDF.
 * 
 * @param repository the Repository object
 * @param request the HttpServletRequest object
 * @param response the HttpServletResponse object
 * @return a model and view for exporting the statements.
 * @throws ClientHTTPException throws when errors in parameters 
 */
private ModelAndView getExportStatementsResult(final Repository repository, final HttpServletRequest request,
		final HttpServletResponse response)
		throws ClientHTTPException {
	ProtocolUtil.logRequestParameters(request);

	ValueFactory vf = repository.getValueFactory();

	URI graph = getGraphName(request, vf);

	RDFWriterFactory rdfWriterFactory = ProtocolUtil.getAcceptableService(request, response,
			RDFWriterRegistry.getInstance());

	Map<String, Object> model = new HashMap<String, Object>();

	model.put(ExportStatementsView.CONTEXTS_KEY, new Resource[] { graph });
	model.put(ExportStatementsView.FACTORY_KEY, rdfWriterFactory);
	model.put(ExportStatementsView.USE_INFERENCING_KEY, true);
	model.put(ExportStatementsView.HEADERS_ONLY, METHOD_HEAD.equals(request.getMethod()));
	return new ModelAndView(ExportStatementsView.getInstance(), model);
}
 

/**
 * Delete data from the graph.
 * 
 * @param repository the Repository object
 * @param request the HttpServletRequest object
 * @param response the HttpServletResponse object
 * @return the EmptySuccessView if successes
 * @throws ClientHTTPException throws when there are errors in getting the name of the Graph
 * @throws ServerHTTPException throws when errors happens update the data
 */
private ModelAndView getDeleteDataResult(final Repository repository,
		final HttpServletRequest request, final HttpServletResponse response)
		throws ClientHTTPException, ServerHTTPException {
	ProtocolUtil.logRequestParameters(request);

	ValueFactory vf = repository.getValueFactory();

	URI graph = getGraphName(request, vf);

	try {
		RepositoryConnection repositoryCon = repository.getConnection();
		synchronized (repositoryCon) {
			repositoryCon.clear(graph);
		}
		repositoryCon.close();
		return new ModelAndView(EmptySuccessView.getInstance());
	} catch (RepositoryException e) {
		throw new ServerHTTPException("Repository update error: " + e.getMessage(), e);
	}
}
 

@Override
public ModelAndView serve(final Repository repository, final HttpServletRequest request, final HttpServletResponse response)
		throws Exception {
	ProtocolUtil.logRequestParameters(request);

	Map<String, Object> model = new HashMap<String, Object>();
	final boolean headersOnly = METHOD_HEAD.equals(request.getMethod());

	if (!headersOnly) {

		ValueFactory vf = repository.getValueFactory();
		Resource[] contexts = ProtocolUtil.parseContextParam(request, Protocol.CONTEXT_PARAM_NAME, vf);

		long size = -1;

		try {
			RepositoryConnection repositoryCon = repository.getConnection();
			synchronized (repositoryCon) {
				size = repositoryCon.size(contexts);
			}
			repositoryCon.close();
		} catch (RepositoryException e) {
			throw new ServerHTTPException("Repository error: " + e.getMessage(), e);
		}
		model.put(SimpleResponseView.CONTENT_KEY, String.valueOf(size));
	}

	return new ModelAndView(SimpleResponseView.getInstance(), model);
}
 

/**
 * Get all statements and export them as RDF.
 * 
 * @param repository the Repository object
 * @param request the HttpServletRequest object
 * @param response the HttpServletResponse object
 * @return a model and view for exporting the statements.
 * @throws ClientHTTPException throws when there errors in parsing the request
 */
private ModelAndView getExportStatementsResult(final Repository repository, final HttpServletRequest request,
		final HttpServletResponse response)
		throws ClientHTTPException {
	ProtocolUtil.logRequestParameters(request);

	ValueFactory vf = repository.getValueFactory();

	Resource subj = ProtocolUtil.parseResourceParam(request, SUBJECT_PARAM_NAME, vf);
	URI pred = ProtocolUtil.parseURIParam(request, PREDICATE_PARAM_NAME, vf);
	Value obj = ProtocolUtil.parseValueParam(request, OBJECT_PARAM_NAME, vf);
	Resource[] contexts = ProtocolUtil.parseContextParam(request, CONTEXT_PARAM_NAME, vf);
	boolean useInferencing = ProtocolUtil.parseBooleanParam(request, INCLUDE_INFERRED_PARAM_NAME, true);

	RDFWriterFactory rdfWriterFactory = ProtocolUtil.getAcceptableService(request, response,
			RDFWriterRegistry.getInstance());

	Map<String, Object> model = new HashMap<String, Object>();
	model.put(ExportStatementsView.SUBJECT_KEY, subj);
	model.put(ExportStatementsView.PREDICATE_KEY, pred);
	model.put(ExportStatementsView.OBJECT_KEY, obj);
	model.put(ExportStatementsView.CONTEXTS_KEY, contexts);
	model.put(ExportStatementsView.USE_INFERENCING_KEY, Boolean.valueOf(useInferencing));
	model.put(ExportStatementsView.FACTORY_KEY, rdfWriterFactory);
	model.put(ExportStatementsView.HEADERS_ONLY, METHOD_HEAD.equals(request.getMethod()));
	model.put(ExportStatementsView.REPO_KEY, repository);
	return new ModelAndView(ExportStatementsView.getInstance(), model);
}
 

/**
 * Delete data from the repository.
 * 
 * @param repository the Repository object
 * @param request the HttpServletRequest object
 * @param response the HttpServletResponse object
 * @return EmptySuccessView if success
 * @throws HTTPException throws when there are repository update errors
 */
private ModelAndView getDeleteDataResult(final Repository repository, final HttpServletRequest request,
		final HttpServletResponse response)
		throws HTTPException {
	ProtocolUtil.logRequestParameters(request);

	ValueFactory vf = repository.getValueFactory();

	Resource subj = ProtocolUtil.parseResourceParam(request, SUBJECT_PARAM_NAME, vf);
	URI pred = ProtocolUtil.parseURIParam(request, PREDICATE_PARAM_NAME, vf);
	Value obj = ProtocolUtil.parseValueParam(request, OBJECT_PARAM_NAME, vf);
	Resource[] contexts = ProtocolUtil.parseContextParam(request, CONTEXT_PARAM_NAME, vf);

	try {
		RepositoryConnection repositoryCon = repository.getConnection();
		synchronized (repositoryCon) {
			repositoryCon.remove(subj, pred, obj, contexts);
		}
		repositoryCon.close();
		return new ModelAndView(EmptySuccessView.getInstance());
	} catch (RepositoryException e) {
		if (e.getCause() != null && e.getCause() instanceof HTTPException) {
			// custom signal from the backend, throw as HTTPException directly
			// (see SES-1016).
			throw (HTTPException) e.getCause();
		} else {
			throw new ServerHTTPException("Repository update error: " + e.getMessage(), e);
		}
	}
}
 

@Override
public ModelAndView serve(final Repository repository, final HttpServletRequest request, final HttpServletResponse response)
		throws Exception {
	Map<String, Object> model = new HashMap<String, Object>();

	if (METHOD_GET.equals(request.getMethod())) {
		Repository systemRepository = _repositoryManager.getSystemRepository();
		ValueFactory vf = systemRepository.getValueFactory();

		try {
			RepositoryConnection con = systemRepository.getConnection();
			try {
				// connection before returning. Would be much better to stream the query result directly to the client.

				List<String> bindingNames = new ArrayList<String>();
				List<BindingSet> bindingSets = new ArrayList<BindingSet>();

				TupleQueryResult queryResult = con.prepareTupleQuery(QueryLanguage.SERQL,
						REPOSITORY_LIST_QUERY).evaluate();
				try {
					// Determine the repository's URI
					StringBuffer requestURL = request.getRequestURL();
					if (requestURL.charAt(requestURL.length() - 1) != '/') {
						requestURL.append('/');
					}
					String namespace = requestURL.toString();

					while (queryResult.hasNext()) {
						QueryBindingSet bindings = new QueryBindingSet(queryResult.next());

						String id = bindings.getValue("id").stringValue();
						bindings.addBinding("uri", vf.createURI(namespace, id));

						bindingSets.add(bindings);
					}

					bindingNames.add("uri");
					bindingNames.addAll(queryResult.getBindingNames());
				} finally {
					queryResult.close();
				}
				model.put(QueryResultView.QUERY_RESULT_KEY,
						new TupleQueryResultImpl(bindingNames, bindingSets));

			} finally {
				con.close();
			}
		} catch (RepositoryException e) {
			throw new ServerHTTPException(e.getMessage(), e);
		}
	}

	TupleQueryResultWriterFactory factory = ProtocolUtil.getAcceptableService(request, response,
			TupleQueryResultWriterRegistry.getInstance());

	model.put(QueryResultView.FILENAME_HINT_KEY, "repositories");
	model.put(QueryResultView.FACTORY_KEY, factory);
	model.put(QueryResultView.HEADERS_ONLY, METHOD_HEAD.equals(request.getMethod()));

	return new ModelAndView(TupleQueryResultView.getInstance(), model);
}
 

private void init(Repository repository) {
	this.repository = repository;
	this.valueFactory = repository.getValueFactory();
}
 

@Test
public void testDirectRepositoryAccess() throws Exception {
	Model model = getModelFactory().createModel();
	model.open();

	// fetch the Repository, a Connection and a ValueFactory
	Repository repository = (Repository) model
			.getUnderlyingModelImplementation();
	RepositoryConnection connection = repository.getConnection();
	ValueFactory factory = repository.getValueFactory();

	// add a statement
	model.addStatement(subject, predicate, object);

	// convert the statement parts to OpenRDF data types
	Resource openRdfSubject = ConversionUtil.toOpenRDF(subject, factory);
	org.openrdf.model.URI openRdfPredicate = ConversionUtil.toOpenRDF(
			predicate, factory);
	Value openRdfObject = ConversionUtil.toOpenRDF(object, factory);
	org.openrdf.model.URI context = RepositoryModel.DEFAULT_OPENRDF_CONTEXT;

	// make sure this statement is contained in this model
	assertTrue(connection.hasStatement(openRdfSubject, openRdfPredicate,
			openRdfObject, false, context));

	// make sure this statement can also be found through the Model API
	ClosableIterator<? extends Statement> sit = model.findStatements(
			subject, predicate, object);
	assertNotNull(sit);
	assertTrue(sit.hasNext());

	Statement s2 = sit.next();
	URI s2s = (URI) s2.getSubject();
	URI s2p = s2.getPredicate();
	URI s2o = (URI) s2.getObject();

	assertEquals(subject, s2s);
	assertEquals(predicate, s2p);
	assertEquals(object, s2o);

	// make sure that this statement is only returned once
	assertFalse(sit.hasNext());

	// clean-up
	sit.close();
	connection.close();
	model.close();
}