/*
* Serialize Graph to turtle format and deserialize.
*/
@Test
public void testTurtleSerializer() {
initializeGraph();
SerializingProvider provider = new JenaSerializerProvider();
ByteArrayOutputStream serializedGraph = new ByteArrayOutputStream();
provider.serialize(serializedGraph, mGraph.getGraph(), "text/turtle");
InputStream in = new ByteArrayInputStream(serializedGraph.toByteArray());
Graph deserializedGraph = parse(in, "TURTLE");
// due to http://issues.trialox.org/jira/browse/RDF-6 we cannot just
// check
// that the two graphs are equals
Assert.assertEquals(deserializedGraph.size(), mGraph.getGraph().size());
Assert.assertEquals(deserializedGraph.hashCode(), mGraph.getGraph().hashCode());
// isomorphism delegated to jena
JenaGraph jenaGraphFromNTriples = new JenaGraph(deserializedGraph);
JenaGraph jenaGraphFromTurtle = new JenaGraph(mGraph.getGraph());
Assert.assertTrue(jenaGraphFromNTriples.isIsomorphicWith(jenaGraphFromTurtle));
}
/**
* This method has no conversion calls, to it can be invoked by subclasses that wish to modify it
* afterwards.
*
* @param merge
* @return
*/
protected MGraph exportToMGraph(boolean merge, IRI prefix) {
// if (merge) throw new UnsupportedOperationException(
// "Merge not implemented yet for Clerezza triple collections.");
long before = System.currentTimeMillis();
// No need to store, give it a name, or anything.
MGraph root = new SimpleMGraph();
UriRef iri = new UriRef(prefix + _id);
// Add the import declarations for directly managed ontologies.
if (root != null) {
// Set the ontology ID
root.add(new TripleImpl(iri, RDF.type, OWL.Ontology));
if (merge) {
log.warn(
"Merging of Clerezza triple collections is only implemented one level down. Import statements will be preserved for further levels.");
Iterator<Triple> it;
Set<Resource> importTargets = new HashSet<Resource>();
for (OWLOntologyID ontologyId : managedOntologies) {
Graph g = getOntology(ontologyId, Graph.class, false);
root.addAll(g);
it = g.filter(null, OWL.imports, null);
while (it.hasNext()) {
IRI tgt;
Resource r = it.next().getObject();
try {
if (r instanceof UriRef) tgt = IRI.create(((UriRef) r).getUnicodeString());
else if (r instanceof Literal) tgt = IRI.create(((Literal) r).getLexicalForm());
else tgt = IRI.create(r.toString());
tgt = URIUtils.sanitize(tgt);
importTargets.add(new UriRef(tgt.toString()));
} catch (Exception ex) {
log.error("FAILED to obtain import target from resource {}", r);
continue;
}
}
it = g.filter(null, RDF.type, OWL.Ontology);
while (it.hasNext()) {
NonLiteral ontology = it.next().getSubject();
log.debug("Removing all triples related to {} from {}", ontology, iri);
Iterator<Triple> it2 = g.filter(ontology, null, null);
while (it2.hasNext()) root.remove(it2.next());
}
/*
* Reinstate import statements, though. If imported ontologies were not merged earlier, we
* are not doing it now anyway.
*/
for (Resource target : importTargets) root.add(new TripleImpl(iri, OWL.imports, target));
}
} else {
String base = prefix + getID();
for (int i = 0; i < backwardPathLength; i++)
base = URIUtils.upOne(URI.create(base)).toString();
base += "/";
// The key set of managedOntologies contains the ontology IRIs, not their storage keys.
for (OWLOntologyID ontologyId : managedOntologies) {
IRI physIRI =
// ontologyId.getVersionIRI() == null ? URIUtils.sanitize(IRI
// .create(base + ontologyId.getOntologyIRI())) : URIUtils.sanitize(IRI
// .create(base + ontologyId.getVersionIRI()));
IRI.create(base + OntologyUtils.encode(ontologyId));
root.add(new TripleImpl(iri, OWL.imports, new UriRef(physIRI.toString())));
}
}
log.debug(
"Clerezza export of {} completed in {} ms.",
getID(),
System.currentTimeMillis() - before);
}
return root;
}
