final MetaObject metaObject = getInputContext().getMetaObject();
if (metaObject != null && metaObject instanceof MetaSlot) {
final MetaSlot metaSlot = (MetaSlot) metaObject;
final Class defaultValidator = CaptchaValidator.class;
final Properties properties = new Properties();
metaSlot.setValidators(Collections.singletonList(new ValidatorProperties(defaultValidator, properties)));
}
}
};
}