LoadOWLOntologyFromDB

How do I load a Protege-OWL ontology from a Protege database using the API?

Method 1

The simplest way to load a Protege-OWL ontology from a Protege database is to programatically load the project file (.pprj), which already contains all of the necessary database connection information:

    Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);
    OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();

Method 2

The second method should be used if there is no project file (.pprj) associated with the Protege-OWL database ontology:

    JenaKnowledgeBaseFactory.useStandalone = false;
    Collection errors = new ArrayList();
    //the "false" argument means that it won't overide the existing table
    OwlDatabaseCreator creator = new OwlDatabaseCreator(false);
    creator.setDriver("com.mysql.jdbc.Driver");
    creator.setURL("jdbc:mysql://localhost/protege");
    creator.setUsername("protege");
    creator.setPassword("mypass");
    creator.setTable("tableName");
    try {
          creator.create(errors);
          OWLModel owlModel = creator.getOwlModel();
     } catch (OntologyLoadException e) {	
          e.printStackTrace();
     }
    

The "false" argument to the

OwlDatabaseCreator

class tells it to use an existing database rather than overwrite it.