Examples of com.hp.hpl.jena.rdf.model.ModelMaker

com.hp.hpl.jena.rdf.model.ModelMaker
A ModelMaker contains a collection of named models, methods for creating new models [both named and anonymous] and opening previously-named models, removing models, and accessing a single "default" Model for this Maker.
Additional constraints are placed on a ModelMaker as compared to its ancestor ModelSource. ModelMakers do not arbitrarily forget their contents - once they contain a named model, that model stays inside the ModelMaker until that ModelMaker goes away, and maybe for longer (eg if the ModelMaker fronted a database or directory). And new models can be added to a ModelMaker.

        if (s_reload) {


            // we pass cleanDB=true to clear out existing models
            // NOTE: this will remove ALL Jena models from the named persistent store, so
            // use with care if you have existing data stored
            ModelMaker maker = po.getRDBMaker( s_dbURL, s_dbUser, s_dbPw, s_dbType, true );


            // now load the source data into the newly cleaned db
            po.loadDB( maker, s_source );
        }


        // now we list the classes in the database, to show that the persistence worked
        ModelMaker maker = po.getRDBMaker( s_dbURL, s_dbUser, s_dbPw, s_dbType, false );
        po.listClasses( maker, s_source );
    }

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    } else if(backend.equalsIgnoreCase(FILE)) {
      String filename = p.getProperty(FILENAME);
      if(filename == null) {
        throw new RuntimeException("Please specify a filename in your property file!");
      }
      ModelMaker maker = getFileModelMaker(filename);
      model = maker.createDefaultModel();
    } else {
      throw new IllegalArgumentException("Illegal back-end type: " + backend);
    }
    
    // reasoning

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    String dbUrl = "jdbc:mysql://" + hostName + "/" + dbName;
    // create a database connection
    IDBConnection conn = new DBConnection(dbUrl, userName, password, "MySQL");


    // create a model maker with the given connection parameters
    ModelMaker maker = ModelFactory.createModelRDBMaker(conn);


    ModelRDB model = (ModelRDB) maker.openModel(modelName);
    InputStream file = new FileInputStream(rdfFileName);
    model.read(file,null,"N3");
    file.close();
  }

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    String jdbcType = "Derby";


    // Create database connection
    LOGGER.debug("Creating RDB database with URL " + jdbcUrl);
    IDBConnection conn = new DBConnection(jdbcUrl, jdbcUser, jdbcPassword, jdbcType);
    ModelMaker maker = ModelFactory.createModelRDBMaker(conn);


    // create or open the default model
    Model model = maker.createDefaultModel(); 


    return model;
  }

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