EnumLabelsResolver.java

@ApplicationScoped
public class EnumLabelsResolver implements LabelResolver {
    @Override
    public List<String> resolveLabelsFor(ConstraintDescriptor<?> constraintDescriptor) {
        List<String> result = new ArrayList<>();
        for (Method annotationMethod : constraintDescriptor.getAnnotation().annotationType().getDeclaredMethods()) {
            if (LabelId.class.isAssignableFrom(annotationMethod.getReturnType())) {
                try {
                    LabelId labelId = (LabelId) annotationMethod.invoke(constraintDescriptor.getAnnotation());
                    result.add(labelId.getId());
                } catch (Exception e) {
                    throw ExceptionUtils.throwAsRuntimeException(e);
                }
            }
        }
        return result;
    }
}

EnumMessageTemplateResolver.java

@ApplicationScoped
public class EnumMessageTemplateResolver implements MessageTemplateResolver {
    @Override
    public String resolveMessageTemplateFor(ConstraintDescriptor<?> constraintDescriptor) {
        for (Method annotationMethod : constraintDescriptor.getAnnotation().annotationType().getDeclaredMethods()) {
            if (MessageId.class.isAssignableFrom(annotationMethod.getReturnType())) {
                try {
                    MessageId messageId = (MessageId) annotationMethod.invoke(constraintDescriptor.getAnnotation());
                    return "{" + messageId.getId() + "}";
                } catch (Exception e) {
                    throw ExceptionUtils.throwAsRuntimeException(e);
                }
            }
        }
        return null;
    }
}