Hi All,
I want to load an ontology file to persistent TDB store. The ontology
file imports other ontologies that are also located in the same local
directory. The code is as follows:
......
Dataset dataset = TDBFactory.assembleDataset(assemblerFile);
dataset.begin(ReadWrite.WRITE);
try {
Model base = dataset.getDefaultModel();
OntModel model = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM,
base);
OntDocumentManager dm = model.getDocumentManager();
dm.setProcessImports(true);
dm.setCacheModels(true);
FileInputStream inputStream =
FileIOManager.getFileInputStream(inputFileName);
model.read(inputStream);
// Finally, commit the transaction.
dataset.commit();
} finally {
dataset.end();
}
Then I want to get a sub-model from the dataset,
......
Dataset dataset = TDBFactory.assembleDataset(assemblerFile);
dataset.begin(ReadWrite.READ);
try {
Model subModel = dataset.getNamedModel("http://...";);
Query query = QueryFactory.read(queryString);
QueryExecution qexec = QueryExecutionFactory.create(query, subModel);
try {
ResultSet results = qexec.execSelect();
ResultSetFormatter.out(results);
} finally {
qexec.close();
}
} finally {
dataset.end();
}
But the output is null. Can you tell me how to do?
Thank you very much.
Deyan
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