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| import com.hp.hpl.jena.ontology.OntModelSpec;
import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.sparql.util.IndentedWriter;
import com.hp.hpl.jena.util.FileManager;
import com.hp.hpl.jena.vocabulary.RDF;
public class JenaTest{
public static final String owlFile = "resource/cours.owl";
public static final String NL = System.getProperty("line.separator") ;
public static void main( String[] args ) {
// Creation d'un modele d'ontologie pour une ontologie OWL-DL avec un resonneur RDFS
Model m =
ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM_RDFS_INF);
// Lecture du fichier OWL. Le Namespace de l’ontologie doit être spécifié
FileManager.get().readModel( m, owlFile );
String myOntologyName = "cours";
String myOntologyNS = "http://univ-annaba.dz/m2sis/owl/cours#";
// Définition de prefixe pour simplifier l'utilisation de SPARQL
String rdfPrefix = "PREFIX rdf: <"+RDF.getURI()+">" ;
String myOntologyPrefix = "PREFIX "+myOntologyName+": <"+myOntologyNS+">" ;
// Construction de la requete
String queryString = myOntologyPrefix + NL
+ rdfPrefix + NL +
"SELECT ?individu WHERE {?individu rdf:type cours:Magistral }" ;
Query query = QueryFactory.create(queryString) ;
// Affichage de la requete sur la sortie standard.
query.serialize(new IndentedWriter(System.out,true)) ;
System.out.println() ;
// Create a single execution of this query, apply to a model
// which is wrapped up as a Dataset
QueryExecution qexec = QueryExecutionFactory.create(query, m) ;
// Execution de la requete
try {
// Pour l'instant nous nous limitons a des requetes de type SELECT
ResultSet rs = qexec.execSelect() ;
// Affichage des resultats
for ( ; rs.hasNext() ; ){
QuerySolution rb = rs.nextSolution() ;
RDFNode y = rb.get("individu");
System.out.print("uri : "+y+"--- ");
Resource z = (Resource) rb.getResource("individu");
System.out.println("plus simplement "+z.getLocalName());
}
}
finally{
qexec.close() ;
}
}
} |
