/**
* Obtain a Model from the persistent TDB store.
*
* @param path2db (location of the TDB store).
* @return {@link Model}
*/
public static Model model(String path2db) {
// TDB.setExecutionLoggin(InfoLevel.INFO);
TDB.getContext().set(TDB.symLogExec, false);
TDB.getContext().set(TDB.symUnionDefaultGraph, true);
rdf_model = TDBFactory.createModel(path2db);
return rdf_model;
}
@After
public void tearDown() {
TDB.sync(dsGraph);
dsGraph.close();
f.delete();
TDB.closedown();
}
@Override
protected Graph createGraph() throws IOException {
TDB.init();
f = new File(System.getProperty("java.io.tmpdir") + "/TDBTest");
dsGraph = TDBFactory.createDatasetGraph(f.getCanonicalPath());
return dsGraph.getDefaultGraph();
}
/**
* Remove a Resource from the specified model. If property is null, the entire resource will be
* removed. Otherwise only the specified property will be removed from the resource.
*
* @param path2db (location of the TDB store).
* @param uri (base URI of the resource):
* @param id (resource id).
* @param property (property of the resource). can be null.
*/
public static void removeResource(String path2db, String uri, String id, Property property) {
// TDB.setExecutionLogging(InfoLevel.INFO);
TDB.getContext().set(TDB.symLogExec, true);
rdf_model = TDBFactory.createModel(path2db);
if (property == null) {
rdf_model.removeAll(rdf_model.createResource(uri + id), null, null);
} else {
rdf_model.removeAll(rdf_model.createResource(uri + id), property, null);
}
}
public static void processGlobalSystemProperties() {
Context context = processProperties(System.getProperties());
TDB.getContext().setAll(context);
}
/**
* Remove all data (triples) from the specified TDB store.
*
* @param path2db (location of the TDB store).
*/
public static void removeData(String path2db) {
// TDB.setExecutionLogging(InfoLevel.INFO);
TDB.getContext().set(TDB.symLogExec, true);
rdf_model = TDBFactory.createModel(path2db);
rdf_model.removeAll();
}
public static void main(String args[]) {
String SOURCE = "http://spitfire-project.eu/ontology.rdf",
SOURCE1 = "http://spitfire-project.eu/sn.rdf",
NS = "http://spitfire-project.eu/ontology/ns/",
NS1 = "http://spitfire-project.eu/ontology/ns/sn/";
// create a model using reasoner
OntModel model1_reasoner =
ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_MICRO_RULE_INF);
OntModel model_instances =
ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_MICRO_RULE_INF);
// create a model which doesn't use a reasoner
OntModel model2_noreasoner = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM);
/** ===========1. STORE IN A NON-OwlFull MODEL==============* */
// read the RDF/XML file
model1_reasoner.read(SOURCE, "RDF/XML");
model1_reasoner.read(SOURCE1, "RDF/XML");
model2_noreasoner.read(SOURCE, "RDF/XML");
model2_noreasoner.read(SOURCE1, "RDF/XML");
model1_reasoner.add(
model1_reasoner.createResource(NS + "containedIn"), RDF.type, OWL.TransitiveProperty);
// add the instances
// model1_reasoner.add(model1_reasoner.createResource(NS+"fan123"), RDF.type,
// model1_reasoner.createResource(NS1+"Fan"));
// model_instances.add(model_instances.createResource(NS+"fan123"), RDF.type,
// model_instances.createResource(NS1+"Fan"));
model_instances.add(
model_instances.getProperty(NS + "containedIn"),
OWL.equivalentProperty,
model_instances.createProperty(
"http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#hasLocation"));
model_instances.add(
model_instances.createResource(NS + "desk_a"),
model_instances.getProperty(NS + "containedIn"),
model_instances.createResource(NS + "floor3"));
model_instances.add(
model2_noreasoner.createResource(NS + "floor3"),
model_instances.getProperty(NS + "containedIn"),
model_instances.createResource(NS + "cti"));
// model1_reasoner.add(model2_noreasoner);
model1_reasoner.add(model2_noreasoner);
// prints out the RDF/XML structure
printModel(model1_reasoner, null);
printModel(model1_reasoner, model1_reasoner.getProperty(NS + "containedIn"));
// printModel(model2_noreasoner);
/** ===========2. STORE IN THE TDB==============* */
// Direct way: Make a TDB-backed dataset
String directory =
System.getProperty("user.dir")
+ ".ld4s/tdb"
+ LD4SConstants.SYSTEM_SEPARATOR
+ "LD4SDataset1";
File dirf = new File(directory);
if (!dirf.exists()) {
dirf.mkdirs();
}
Dataset dataset = TDBFactory.createDataset(directory);
TDB.sync(dataset);
Resource subj = model1_reasoner.listSubjects().next();
dataset.begin(ReadWrite.WRITE);
try {
dataset.addNamedModel(subj.getURI(), model1_reasoner);
dataset.addNamedModel(NS + "desk_a", model_instances);
dataset.commit();
// Or call .abort()
} catch (Exception e) {
e.printStackTrace();
} finally {
dataset.end();
dataset.close();
}
/** ===========3. QUERY==============* */
// Create a new query
String queryString =
"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> "
+ "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> "
+ "PREFIX dul: <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#> "
+ "PREFIX spt: <"
+ NS
+ "> "
+ "select ?uri "
+ "where { "
+ "?uri dul:hasLocation spt:cti "
+ "} ";
Query query = QueryFactory.create(queryString);
System.out.println("----------------------");
System.out.println("Query Result Sheet");
System.out.println("----------------------");
System.out.println("Direct&Indirect Descendants (model1)");
System.out.println("-------------------");
// Execute the query and obtain results
QueryExecution qe = QueryExecutionFactory.create(query, model1_reasoner);
com.hp.hpl.jena.query.ResultSet results = qe.execSelect();
// Output query results
ResultSetFormatter.out(System.out, results, query);
qe.close();
System.out.println("----------------------");
System.out.println("Only Direct Descendants (model2)");
System.out.println("----------------------");
// Execute the query and obtain results
qe = QueryExecutionFactory.create(query, model2_noreasoner);
results = qe.execSelect();
// Output query results
ResultSetFormatter.out(System.out, results, query);
qe.close();
}
