How to use

addOptionValidator

method

in

org.freeplane.features.mode.Controller

private void addPropertiesToOptionPanel() {
  final URL preferences = this.getClass().getResource("preferences.xml");
  if (preferences == null)
    throw new RuntimeException("cannot open preferences");
  Controller.getCurrentController().addOptionValidator(new IValidator() {
    @Override
    public ValidationResult validate(Properties properties) {
      final ValidationResult result = new ValidationResult();
      final String readAccessString = properties
        .getProperty(ScriptingPermissions.RESOURCES_EXECUTE_SCRIPTS_WITHOUT_READ_RESTRICTION);
      final String writeAccessString = properties
      .getProperty(ScriptingPermissions.RESOURCES_EXECUTE_SCRIPTS_WITHOUT_WRITE_RESTRICTION);
      final String classpath = properties.getProperty(ScriptResources.RESOURCES_SCRIPT_CLASSPATH);
      final boolean readAccess = readAccessString != null && Boolean.parseBoolean(readAccessString);
      final boolean writeAccess = writeAccessString != null && Boolean.parseBoolean(writeAccessString);
      final boolean classpathIsSet = classpath != null && classpath.length() > 0;
      if (classpathIsSet && !readAccess) {
        result.addError(TextUtils.getText("OptionPanel.validate_classpath_needs_readaccess"));
      }
      if (writeAccess && !readAccess) {
        result.addWarning(TextUtils.getText("OptionPanel.validate_write_without_read"));
      }
      return result;
    }
  });
  final MModeController modeController = (MModeController) Controller.getCurrentModeController();
  modeController.getOptionPanelBuilder().load(preferences);
}

public static void install(final FormatController formatController) {
  Controller.getCurrentController().addExtension(FormatController.class, formatController);
  Controller.getCurrentController().addOptionValidator(formatController.createValidator());
}