@Override
 public void setReadOnly(boolean readOnly) {
   persistenceUnitTextBox.setReadOnly(readOnly);
   persistenceProviderTextBox.setReadOnly(readOnly);
   datasourceTextBox.setReadOnly(readOnly);
   transactionTypeJTARadioButton.setEnabled(!readOnly);
   transactionTypeResourceLocalRadioButton.setEnabled(!readOnly);
   persistenceUnitProperties.setReadOnly(readOnly);
   persistenceUnitClasses.setReadOnly(readOnly);
 }