Examples with Statement org.apache.jena.rdf.model.Statement used on opensource projects

Example 51 with Statement

use of org.apache.jena.rdf.model.Statement in project webofneeds by researchstudio-sat.

the class DatasetToDatasetBySparqlGSPOSelectFunction method apply.

@Override
public Dataset apply(Dataset dataset) {
    dataset.begin(ReadWrite.READ);
    Dataset result = DatasetFactory.createGeneral();
    result.begin(ReadWrite.WRITE);
    Query query = QueryFactory.create(sparql);
    try (QueryExecution queryExecution = QueryExecutionFactory.create(query, dataset)) {
        ResultSet resultSet = queryExecution.execSelect();
        RDFNode currentProposal = null;
        Model currentProposalContent = ModelFactory.createDefaultModel();
        while (resultSet.hasNext()) {
            QuerySolution solution = resultSet.next();
            RDFNode proposalNode = solution.get("g");
            if (currentProposal == null) {
                // first solution: remember uri of first proposal
                currentProposal = proposalNode;
            } else {
                // the currentProposal URI and prepare a new empty model for the next proposal
                if (!currentProposal.equals(proposalNode)) {
                    // we have seen all triples of currentProposal
                    result.addNamedModel(currentProposal.asResource().getURI(), currentProposalContent);
                    currentProposalContent = ModelFactory.createDefaultModel();
                }
                currentProposal = proposalNode;
            }
            // add current triple into currentAgreementModel
            RDFNode s = solution.get("s");
            RDFNode p = solution.get("p");
            RDFNode o = solution.get("o");
            Statement newStatement = new StatementImpl(s.asResource(), new PropertyImpl(p.asResource().getURI()), o);
            currentProposalContent.add(newStatement);
        }
        // add the last model
        if (currentProposal != null) {
            result.addNamedModel(currentProposal.asResource().getURI(), currentProposalContent);
        }
        return result;
    } finally {
        dataset.commit();
        result.commit();
    }
}

Example 52 with Statement

use of org.apache.jena.rdf.model.Statement in project webofneeds by researchstudio-sat.

the class WonLinkedDataUtils method getWonNodeURIForNeedOrConnection.

public static URI getWonNodeURIForNeedOrConnection(final URI resURI, final Model resourceModel) {
    assert resourceModel != null : "model must not be null";
    // we didnt't get the queue name. Check if the model contains a triple <baseuri> won:hasWonNode
    // <wonNode> and get the information from there.
    logger.debug("getting WON node URI from model");
    Resource baseResource = resourceModel.getResource(resURI.toString());
    logger.debug("resourceModel: {}", RdfUtils.toString(resourceModel));
    StmtIterator wonNodeStatementIterator = baseResource.listProperties(WON.HAS_WON_NODE);
    if (!wonNodeStatementIterator.hasNext()) {
        // no won:hasWonNode triple found. we can't do anything.
        logger.debug("base resource {} has no won:hasWonNode property", baseResource);
        return null;
    }
    Statement stmt = wonNodeStatementIterator.nextStatement();
    RDFNode wonNodeNode = stmt.getObject();
    if (!wonNodeNode.isResource()) {
        logger.debug("won:hasWonNode property of base resource {} is not a resource", baseResource);
        return null;
    }
    URI wonNodeUri = URI.create(wonNodeNode.asResource().getURI().toString());
    logger.debug("obtained WON node URI: {}", wonNodeUri);
    if (wonNodeStatementIterator.hasNext()) {
        logger.warn("multiple WON node URIs found for resource {}, using first one: {} ", baseResource, wonNodeUri);
    }
    return wonNodeUri;
}

Example 53 with Statement

use of org.apache.jena.rdf.model.Statement in project webofneeds by researchstudio-sat.

the class ModelConverter method modelToGraphCollection.

private static GraphCollection modelToGraphCollection(String name, Model model, Map<String, String> pm) {
    // Convert each subj pred obj in Jena Statement into String and add to
    // SigningFramework's NamedGraph.
    // The simpler approach with just using Jena's writer and Signingframework's
    // reader to transform data between data structures won't work since
    // Signingframework has problems with recognizing the [] structure
    GraphCollection graphc = new GraphCollection();
    NamedGraph namedGraph = new NamedGraph(enclose(name, "<", ">"), 0, null);
    StmtIterator iterator = model.listStatements();
    while (iterator.hasNext()) {
        Statement stmt = iterator.nextStatement();
        String subjString = rdfNodeAsString(stmt.getSubject());
        String objString = rdfNodeAsString(stmt.getObject());
        String predString = enclose(stmt.getPredicate().asResource().getURI(), "<", ">");
        Triple gcTriple = new Triple(subjString, predString, objString);
        namedGraph.addTriple(gcTriple);
    }
    graphc.addGraph(namedGraph);
    for (String prefix : pm.keySet()) {
        graphc.addPrefix(new Prefix(prefix + ":", "<" + pm.get(prefix) + ">"));
    }
    return graphc;
}

Example 54 with Statement

use of org.apache.jena.rdf.model.Statement in project webofneeds by researchstudio-sat.

the class WonMessageBuilderTest method check_get_content_in_message_with_content_dataset.

public void check_get_content_in_message_with_content_dataset(final WonMessage msg) {
    Dataset actualContentDataset = msg.getMessageContent();
    Assert.assertTrue("messageContent dataset of message with content has non-empty default graph", actualContentDataset.getDefaultModel().isEmpty());
    Set<String> names = new HashSet<String>();
    Iterators.addAll(names, actualContentDataset.listNames());
    Assert.assertEquals("incorrect number of named graphs", names.size(), 2);
    RdfUtils.toNamedModelStream(actualContentDataset, false).forEach(namedModel -> {
        String graphUri = namedModel.getName();
        Model model = namedModel.getModel();
        Assert.assertTrue("model does not contain its own graph uri", model.containsResource(model.getResource(graphUri)));
        Statement stmt = model.getResource(graphUri).getProperty(SKOS.related);
        Assert.assertNotNull(stmt);
        RDFNode otherGraph = stmt.getObject();
        Assert.assertTrue("Reference to other model not found", actualContentDataset.containsNamedModel(otherGraph.asResource().getURI()));
    });
}

Example 55 with Statement

use of org.apache.jena.rdf.model.Statement in project webofneeds by researchstudio-sat.

the class WonMessageValidatorTest method testMissingAndInvalidMessageDirection.

@Test
@Ignore
public void testMissingAndInvalidMessageDirection() throws IOException {
    // create invalid dataset by removing a triple with message direction
    Dataset invalidDataset = WonRdfUtils.MessageUtils.copyByDatasetSerialization(new WonMessage(createMessageDataset)).getCompleteDataset();
    Model env1Model = invalidDataset.getNamedModel(CREATE_ENV1_NAME);
    Model env2Model = invalidDataset.getNamedModel(CREATE_ENV2_NAME);
    Statement stmtOld = env2Model.createStatement(ResourceFactory.createResource(CREATE_ENV1_ENV2_MSG_URI), RDF.type, WONMSG.TYPE_FROM_OWNER);
    env1Model.remove(stmtOld);
    env2Model.remove(stmtOld);
    // validate this invalid dataset
    WonMessageValidator validator = new WonMessageValidator();
    StringBuilder message = new StringBuilder();
    boolean valid = validator.validate(invalidDataset, message);
    Assert.assertTrue("validation is expected to fail", !valid);
    Assert.assertTrue(message.toString().contains("missing_direction"));
    // create invalid dataset by adding a triple with invalid message direction
    Statement stmtNew = env2Model.createStatement(ResourceFactory.createResource(CREATE_ENV1_ENV2_MSG_URI), RDF.type, ResourceFactory.createProperty("test:property:uri"));
    env2Model.add(stmtNew);
    // validate this invalid dataset
    valid = validator.validate(invalidDataset, message);
    Assert.assertTrue("validation is expected to fail", !valid);
    Assert.assertTrue(message.toString().contains("invalid_direction"));
}