Java 类com.hp.hpl.jena.rdf.model.ModelMaker 实例源码

private void saveToStore(String rdfFileName) throws ClassNotFoundException, IOException
{
    String M_DBDRIVER_CLASS = "com.mysql.jdbc.Driver";
    // load the the driver class
    Class.forName(M_DBDRIVER_CLASS);

    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();
}

/**
 * <p>Method that returns a new or an existing Jena RDB model</p>
 * @param dbUrl - the database url
 * @param dbUser - the database user
 * @param dbPass - the database password
 * @param dbType - the database type
 * @param create - true iff a new model is to be created, false otherwise
 * @return a new or an existing Jena RDB model
 */
public Model getRDBModel( String dbUrl, String dbUser, String dbPass, String dbType, boolean create )
{
    //Create a database model maker
    ModelMaker rdbModelMaker = ModelFactory.createModelRDBMaker( new DBConnection( dbUrl, dbUser, dbPass, dbType ) );

    //If the model does not exist create a new model, else return the existing model
    if( !rdbModelMaker.hasModel( "rdbModel" ) )
    {
        if ( create )
            return rdbModelMaker.createModel( "rdbModel" );
        else
            return null;
    }
    else
        return rdbModelMaker.openModel( "rdbModel" );
}

private static ModelMaker getFileModelMaker(String filename) {
    return com.hp.hpl.jena.rdf.model.ModelFactory.createFileModelMaker(filename);
}