Examples with Statement org.openrdf.model.Statement used on opensource projects

Example 11 with Statement

use of org.openrdf.model.Statement in project qi4j-sdk by Qi4j.

the class EntitySerializerTest method testEntitySerializer.

@Test
public void testEntitySerializer() throws RDFHandlerException {
    EntityReference entityReference = new EntityReference("test2");
    EntityState entityState = entityStore.newUnitOfWork(UsecaseBuilder.newUsecase("Test"), module, System.currentTimeMillis()).entityStateOf(entityReference);
    Iterable<Statement> graph = serializer.serialize(entityState);
    String[] prefixes = new String[] { "rdf", "dc", " vc" };
    String[] namespaces = new String[] { Rdfs.RDF, DcRdf.NAMESPACE, "http://www.w3.org/2001/vcard-rdf/3.0#" };
    new RdfXmlSerializer().serialize(graph, new PrintWriter(System.out), prefixes, namespaces);
}

Example 12 with Statement

use of org.openrdf.model.Statement in project qi4j-sdk by Qi4j.

the class EntityTypeSerializerTest method testEntityTypeSerializer.

@Test
public void testEntityTypeSerializer() throws RDFHandlerException {
    EntityDescriptor entityDescriptor = module.entityDescriptor(TestEntity.class.getName());
    Iterable<Statement> graph = serializer.serialize(entityDescriptor);
    String[] prefixes = new String[] { "rdf", "dc", " vc", "qi4j" };
    String[] namespaces = new String[] { Rdfs.RDF, DcRdf.NAMESPACE, "http://www.w3.org/2001/vcard-rdf/3.0#", Qi4jEntityType.NAMESPACE };
    new RdfXmlSerializer().serialize(graph, new PrintWriter(System.out), prefixes, namespaces);
}

Example 13 with Statement

use of org.openrdf.model.Statement in project qi4j-sdk by Qi4j.

the class EntityResource method representRdfXml.

private Representation representRdfXml(final EntityState entity) throws ResourceException {
    Representation representation = new WriterRepresentation(MediaType.APPLICATION_RDF_XML) {

        @Override
        public void write(Writer writer) throws IOException {
            try {
                Iterable<Statement> statements = entitySerializer.serialize(entity);
                new RdfXmlSerializer().serialize(statements, writer);
            } catch (RDFHandlerException e) {
                throw new IOException(e);
            }
        }
    };
    representation.setCharacterSet(CharacterSet.UTF_8);
    return representation;
}

Example 14 with Statement

use of org.openrdf.model.Statement in project backstage by zepheira.

the class Database method internalBuildPropertyRecords.

private void internalBuildPropertyRecords(SailConnection sc) {
    _propertyRecords = new LinkedList<PropertyRecord>();
    _propertyIDToRecord = new HashMap<String, PropertyRecord>();
    CloseableIteration<? extends Statement, SailException> i;
    try {
        i = sc.getStatements(null, null, null, true);
    } catch (SailException e) {
        _logger.error("Failed to get all statements in order to get property records", e);
        return;
    }
    Set<URI> predicates = new HashSet<URI>();
    try {
        while (i.hasNext()) {
            Statement s = i.next();
            predicates.add(s.getPredicate());
        }
    } catch (SailException e) {
        _logger.warn("Failed to iterate through statements", e);
    } finally {
        try {
            i.close();
        } catch (SailException e) {
            _logger.warn("Failed to close statement iterator", e);
        }
    }
    for (URI predicate : predicates) {
        PropertyRecord r = createPropertyRecord(predicate, sc);
        if (r != null) {
            _propertyRecords.add(r);
            _propertyIDToRecord.put(r.id, r);
        }
    }
}

Example 15 with Statement

use of org.openrdf.model.Statement in project backstage by zepheira.

the class Database method createPropertyRecord.

private PropertyRecord createPropertyRecord(URI predicate, SailConnection sc) {
    String id = getPropertyId(predicate, sc);
    String label = SailUtilities.getStringObject(sc, predicate, RDFS.LABEL, id);
    String valueType = SailUtilities.getStringObject(sc, predicate, ExhibitOntology.VALUE_TYPE, "text");
    Properties properties = new Properties();
    CloseableIteration<? extends Statement, SailException> i = null;
    try {
        i = sc.getStatements(predicate, null, null, true);
    } catch (SailException e) {
        _logger.error("Failed to get all statements in order to get property record", e);
        return null;
    }
    if (i != null) {
        try {
            while (i.hasNext()) {
                Statement s = i.next();
                URI p = s.getPredicate();
                Value o = s.getObject();
                if (!p.equals(RDFS.LABEL) && !p.equals(ExhibitOntology.ID) && !p.equals(ExhibitOntology.VALUE_TYPE)) {
                    properties.put(p.getLocalName(), SailUtilities.valueToString(o));
                }
            }
        } catch (SailException e) {
            _logger.warn("Failed to iterate through statements", e);
        } finally {
            try {
                i.close();
            } catch (SailException e) {
                _logger.warn("Failed to close statement iterator", e);
            }
        }
    }
    return new PropertyRecord(predicate, id, label, valueType, properties);
}