protected function isValid($value)
    {
        if ($value instanceof \DateTimeInterface) {
            return;
        }
        if (!isset($this->options['locale'])) {
            $locale = $this->localizationService->getConfiguration()->getDefaultLocale();
        } elseif (is_string($this->options['locale'])) {
            $locale = new I18n\Locale($this->options['locale']);
        } elseif ($this->options['locale'] instanceof I18n\Locale) {
            $locale = $this->options['locale'];
        } else {
            $this->addError('The "locale" option can be only set to string identifier, or Locale object.', 1281454676);
            return;
        }

        $strictMode = $this->options['strictMode'];

        $formatLength = $this->options['formatLength'];
        DatesReader::validateFormatLength($formatLength);

        $formatType = $this->options['formatType'];
        DatesReader::validateFormatType($formatType);

        if ($formatType === DatesReader::FORMAT_TYPE_TIME) {
            if ($this->datetimeParser->parseTime($value, $locale, $formatLength, $strictMode) === false) {
                $this->addError('A valid time is expected.', 1281454830);
            }
        } elseif ($formatType === DatesReader::FORMAT_TYPE_DATETIME) {
            if ($this->datetimeParser->parseDateAndTime($value, $locale, $formatLength, $strictMode) === false) {
                $this->addError('A valid date and time is expected.', 1281454831);
            }
        } else {
            if ($this->datetimeParser->parseDate($value, $locale, $formatLength, $strictMode) === false) {
                $this->addError('A valid date is expected.', 1281454832);
            }
        }
    }