custom validator 질문있습니다.

[이장군]

안녕하세요, 

spring-boot 기반으로 이것저것 진행중입니다.

Locale 구분하는 custom validator를 예제를 참고하여 만들었습니다. 

이걸 url에 pathParameter에서 validation을 하고 싶은데 제대로 작동하지 않아서요.

어떤 부분이 부족한지 같이 고민 부탁드립니다.

@Target({ElementType.PARAMETER, ElementType.METHOD})

@Retention(RUNTIME)
@Constraint(validatedBy = ValidLocaleValidator.class)
@Documented
public @interface ValidLocale {
    String message() default "Locale";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

public class ValidLocaleValidator implements ConstraintValidator<ValidLocale, String> {
    private Set<String> validLocales = new HashSet<String>();

    @Override
    public void initialize(ValidLocale constraintAnnotation) {
        Locale[]locales = Locale.getAvailableLocales();
        for (java.util.Locale l : locales) {
            validLocales.add(l.toString());
        }
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        System.out.println("is valid start");
        if(!validLocales.contains(value)){
            return false;
        }
        return true;
    }
}

아래는 실제 사용해 보려고 한 api입니다.

@GetMapping("/player-messages/messages/{messageId}/locale/{locale}")
@Timed
public ResponseEntity<List<PlayerMessageViewDTO>> getPlayerMessage(
    @PathVariable Long messageId,
    @PathVariable @ValidLocale final String locale) {
    log.debug("Request to get MessageId:{}, Locale:{}", messageId, locale);
    List<PlayerMessageViewDTO> viewDTO = playerMessageService.getPlayerMessagesByLocale(messageId, locale);
    return new ResponseEntity<List<PlayerMessageViewDTO>>(viewDTO, HttpStatus.OK);
}

아래는 기존 api.

@GetMapping("/player-messages/messages/{messageId}/locale/{locale}")
@Timed
public ResponseEntity<List<PlayerMessageViewDTO>> getPlayerMessage(
    @PathVariable Long messageId,
    @PathVariable final String locale) {
    log.debug("Request to get MessageId:{}, Locale:{}", messageId, locale);
     //validate locale
    if (!validateLocale(locale))
       return ResponseEntity.badRequest().body(null);
    List<PlayerMessageViewDTO> viewDTO = playerMessageService.getPlayerMessagesByLocale(messageId, locale);
    return new ResponseEntity<List<PlayerMessageViewDTO>>(viewDTO, HttpStatus.OK);
}

private boolean validateLocale(@PathVariable String locale) {
    //validate locale
    try {
        LocaleUtils.toLocale(locale);
    } catch (Exception e) {
        return false;
    }
    return true;
}