public static LocalDateTime dateAdd(LocalDateTime localDateTime, LocalTime localTime) {
        return localDateTime.plusHours(localTime.getHour())
                .plusMinutes(localTime.getMinute())
                .plusSeconds(localTime.getSecond())
                .plusNanos(localTime.getNano());
    }
Time calculation

@param dateStr      Time parameter string
@param intervalInfo Interval parsing results
@param isPositive   True is positive, false is negative
@return Calculation result string
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/utils/DateUtil.java