Allow Custom javax.validation.Validator in BeanValidator

[tobiaskahl]

Actually there are 2 Methods in com.vaadin.flow.data.validator.BeanValidator which return the JavaxBeanValidationFactory und Validator.

protected static ValidatorFactory getJavaxBeanValidatorFactory() {
    return LazyFactoryInitializer.FACTORY;
}

public javax.validation.Validator getJavaxBeanValidator() {
    return getJavaxBeanValidatorFactory().getValidator();
}

I would like to set the ValidatorFactory from outside of the BeanValidator to use custom Validator-Implementations. e.g. Springs org.springframework.validation.beanvalidation.LocalValidatorFactoryBean.

[kaliuzhnyi]

Hey. I found a hard way and it's not good, but it's work.
The code is for JAVA 12+ and Vaadin 24

@Configuration
public class ValidatorConfig implements InitializingBean {

    @Autowired
    private ValidatorFactory validatorFactory;

    @Bean
    public ValidatorFactory validatorFactory(MessageSource messageSource) {
        var bean = new LocalValidatorFactoryBean();
        bean.setValidationMessageSource(messageSource);
        return bean;
    }

    @Bean
    public HibernatePropertiesCustomizer hibernatePropertiesCustomizer(ValidatorFactory validatorFactory) {
        // AvailableSettings.JPA_VALIDATION_FACTORY -> javax.persistence.validation.factory
        // AvailableSettings.JAKARTA_VALIDATION_FACTORY -> jakarta.persistence.validation.factory
        return hibernateProperties ->
            hibernateProperties.put(AvailableSettings.JAKARTA_VALIDATION_FACTORY, validatorFactory);
    }

    @Override
    public void afterPropertiesSet() throws Exception {

        var className = "com.vaadin.flow.data.validator.BeanValidator.LazyFactoryInitializer";
        var fieldName = "FACTORY";
        var field = FieldUtils.getDeclaredField(ClassUtils.getClass(className), fieldName, true);

        var unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
        unsafeField.setAccessible(true);
        var unsafe = (Unsafe) unsafeField.get(null);

        unsafe.putObject(unsafe.staticFieldBase(field),
                unsafe.staticFieldOffset(field),
                validatorFactory);

    }
}