use of org.apache.stanbol.ontologymanager.registry.api.RegistryContentException in project stanbol by apache.
the class RootResource method getGraph.
private Graph getGraph(String ontologyId, boolean merged, URI requestUri) {
long before = System.currentTimeMillis();
OWLOntologyID key = OntologyUtils.decode(ontologyId);
log.debug("Will try to retrieve ontology {} from provider.", key);
/*
* Export directly to Graph since the OWLOntologyWriter uses (de-)serializing converters for the
* other formats.
*
* Use oTemp for the "real" graph and o for the graph that will be exported. This is due to the fact
* that in o we want to change import statements, but we do not want these changes to be stored
* permanently.
*/
Graph o = null, oTemp = null;
try {
oTemp = ontologyProvider.getStoredOntology(key, Graph.class, merged);
} catch (Exception ex) {
log.warn("Retrieval of ontology with ID " + key + " failed.", ex);
}
if (oTemp == null) {
log.debug("Ontology {} missing from provider. Trying libraries...", key);
// TODO remove once registry supports OWLOntologyID as public key.
IRI iri = URIUtils.sanitize(IRI.create(ontologyId));
// See if we can touch a library. TODO: replace with event model on the ontology provider.
int minSize = -1;
IRI smallest = null;
for (Library lib : registryManager.getLibraries(iri)) {
int size = lib.getChildren().length;
if (minSize < 1 || size < minSize) {
smallest = lib.getIRI();
minSize = size;
}
}
if (smallest != null) {
log.debug("Selected library for ontology {} is {} .", iri, smallest);
try {
oTemp = registryManager.getLibrary(smallest).getOntology(iri, Graph.class);
} catch (RegistryContentException e) {
log.warn("The content of library " + smallest + " could not be accessed.", e);
}
}
}
// resource-intensive IndexedGraph, since both o and oTemp will be GC'ed after serialization.
if (oTemp != null) {
o = new SimpleGraph(oTemp);
}
if (o == null) {
log.debug("Ontology {} not found in any ontology provider or library.", ontologyId);
return null;
}
log.debug("Retrieved ontology {} .", ontologyId);
// Rewrite imports
String uri = uriInfo.getRequestUri().toString();
URI base = URI.create(uri.substring(0, uri.lastIndexOf(ontologyId) - 1));
// Rewrite import statements
/*
* TODO manage import rewrites better once the container ID is fully configurable (i.e. instead of
* going upOne() add "session" or "ontology" if needed).
*/
Iterator<Triple> imports = o.filter(null, OWL.imports, null);
Set<Triple> oldImports = new HashSet<Triple>();
while (imports.hasNext()) {
oldImports.add(imports.next());
}
for (Triple t : oldImports) {
// construct new statement
String s = ((org.apache.clerezza.commons.rdf.IRI) t.getObject()).getUnicodeString();
if (s.contains("::")) {
s = s.substring(s.indexOf("::") + 2, s.length());
}
org.apache.clerezza.commons.rdf.IRI target = new org.apache.clerezza.commons.rdf.IRI(base + "/" + s);
o.add(new TripleImpl(t.getSubject(), OWL.imports, target));
// remove old statement
o.remove(t);
}
// Versioning.
OWLOntologyID id = OWLUtils.extractOntologyID(o);
if (id != null && !id.isAnonymous() && id.getVersionIRI() == null) {
org.apache.clerezza.commons.rdf.IRI viri = new org.apache.clerezza.commons.rdf.IRI(requestUri.toString());
log.debug("Setting version IRI for export : {}", viri);
o.add(new TripleImpl(new org.apache.clerezza.commons.rdf.IRI(id.getOntologyIRI().toString()), new org.apache.clerezza.commons.rdf.IRI(OWL2Constants.OWL_VERSION_IRI), viri));
}
log.debug("Exported as Clerezza ImmutableGraph in {} ms. Handing over to writer.", System.currentTimeMillis() - before);
return o;
}
Aggregations