Java Code Examples for com.hp.hpl.jena.graph.Node#getURI()

/**
 * Executes a given update command both on remote and local model.
 * 
 * @param data the object holding test data (i.e. commands, queries, datafiles).
 * @throws Exception hopefully never otherwise the corresponding test fails.
 */
protected void executeUpdate(final MisteryGuest data) throws Exception {
	load(data);
	
	final String updateCommandString = readFile(data.query);
	UpdateExecutionFactory.createRemote(UpdateFactory.create(updateCommandString), SPARQL_ENDPOINT_URI).execute();

	SOLRDF_CLIENT.commit();

	UpdateAction.parseExecute(updateCommandString, memoryDataset.asDatasetGraph());
	
	final Iterator<Node> nodes = memoryDataset.asDatasetGraph().listGraphNodes();
	if (nodes != null) {
		while (nodes.hasNext()) {
			final Node graphNode = nodes.next();
			final String graphUri = graphNode.getURI();
			final Model inMemoryNamedModel = memoryDataset.getNamedModel(graphUri);
			assertIsomorphic(inMemoryNamedModel, SOLRDF_CLIENT.getNamedModel(graphUri), graphUri);		
		}
	}
	
	assertIsomorphic(memoryDataset.getDefaultModel(), SOLRDF_CLIENT.getDefaultModel(), null);			
}
 

/**
 * Transforms a Jena node into a java object. Possible node types: uri,
 * variable, literal (datatype, languageTag), blank node
 * 
 * @param n The node to transform
 * @return A specific java object
 * @throws ModelRuntimeException from the underlying model
 */
public static org.ontoware.rdf2go.model.node.Node toRDF2Go(Node n) throws ModelRuntimeException {
	// A return of null indicates that the variable is not present in this
	// solution.
	if(n == null)
		return null;
	
	if(n.isURI())
		return new URIImpl(n.getURI());
	
	if(n.isVariable())
		throw new RuntimeException("Cannot convert a Jena variable to an RDF2Go node");
	
	if(n.isLiteral()) {
		LiteralLabel lit = n.getLiteral();
		// datatype
		if(lit.getDatatypeURI() != null) {
			return new DatatypeLiteralImpl(lit.getLexicalForm(), new URIImpl(
			        lit.getDatatypeURI()));
		}
		
		// language tagged
		if(lit.language() != null && !lit.language().equals(""))
			return new LanguageTagLiteralImpl(lit.getLexicalForm(), lit.language());
		
		// plain
		return new PlainLiteralImpl(lit.getLexicalForm());
	}
	
	if(n.isBlank())
		return new JenaBlankNode(n);
	
	// none of the above - don't know how to transform that
	throw new RuntimeException("no transformation defined from " + n + " to java");
}
 

/**
 * Loads all triples found in the datafile associated with the given name.
 * 
 * @param datafileName the name of the datafile.
 * @param graphs an optional set of target graph URIs. 
 * @throws Exception hopefully never, otherwise the test fails.
 */
protected void load(final MisteryGuest data) throws Exception {
	if (data.datasets == null || data.datasets.length == 0) {
		return;
	}
	
	final Model memoryModel = data.graphURI != null 
			? memoryDataset.getNamedModel(data.graphURI) 
			: memoryDataset.getDefaultModel();
			 
	for (final String datafileName : data.datasets) {
		final String dataURL = source(datafileName).toString();
		final String lang = datafileName.endsWith("ttl") 
				? "TTL" 
				: datafileName.endsWith("nt") 
					? "N-TRIPLES" 
					: null;
		memoryModel.read(dataURL, DUMMY_BASE_URI, lang);
	}  
 
	if (data.graphURI != null) {
		SOLRDF_CLIENT.add(data.graphURI, memoryModel.listStatements());
	} else {
		SOLRDF_CLIENT.add(memoryModel.listStatements());
	}
	
	SOLRDF_CLIENT.commit();
	
	final Iterator<Node> nodes = memoryDataset.asDatasetGraph().listGraphNodes();
	if (nodes != null) {
		while (nodes.hasNext()) {
			final Node graphNode = nodes.next();
			final String graphUri = graphNode.getURI();
			final Model inMemoryNamedModel = memoryDataset.getNamedModel(graphUri);
			assertIsomorphic(inMemoryNamedModel, SOLRDF_CLIENT.getNamedModel(graphUri), graphUri);		
		}
	}
	
	final Model model = (data.graphURI != null) ? SOLRDF_CLIENT.getNamedModel(data.graphURI) : SOLRDF_CLIENT.getDefaultModel();
	assertFalse(Arrays.toString(data.datasets) + ", " + data.query, model.isEmpty());
	assertIsomorphic(memoryModel, model, null);
}
 

/**
 * Factory method. 
 * 
 * @param datasetsFilenames one or more datafile that contains data.
 * @param graphURI the target graphURI.
 * @param queryFilename the name of the file containing the SPARQL query for a given test.
 * @return new {@link MisteryGuest} instance.
 */
public static MisteryGuest misteryGuest(final String queryFilename, final Node graphURI, final String ... datasetsFilenames) {
	return new MisteryGuest(queryFilename, graphURI.getURI(), datasetsFilenames);
}
 

/**
 * Factory method. 
 * 
 * @param datasetsFilenames one or more datafile that contains data.
 * @param graphURI the target graphURI.
 * @param queryFilename the name of the file containing the SPARQL query for a given test.
 * @return new {@link MisteryGuest} instance.
 */
public static MisteryGuest misteryGuest(final String queryFilename, final Node graphURI, final String ... datasetsFilenames) {
	return new MisteryGuest(queryFilename, graphURI.getURI(), datasetsFilenames);
}
 

public String extractValue(Node node) { return node.getURI(); }