if(host.equalsIgnoreCase("") || port.equalsIgnoreCase("") || dbname.equalsIgnoreCase("") || user.equalsIgnoreCase(""))
throw new Exception("Invalid input !");
DataPumpDatabaseConnection dataPumpDatabaseConnection = new DataPumpDatabaseConnection(driver,host,port,dbname,user,password);
dsf.initializeFactory(dataPumpDatabaseConnection);
operationResultLabel.setText(""); //clean old messages
databaseConnectionTester = new DatabaseConnectionTester();
databaseConnectionTester.testConnection();