ZonedDateTimeConvert | Reactive MongoConfig (Kotlin)

MongoConfig.kt

@Configuration
class MongoConfig {
    @Bean
    fun mongoCustomConversions(): MongoCustomConversions {
        val converters = listOf(
            ZonedDateTimeToDate.INSTANCE,
            DateToZonedDateTime.INSTANCE
        )
        return MongoCustomConversions(converters)
    }

    @ReadingConverter
    internal enum class DateToZonedDateTime : Converter<Date?, ZonedDateTime?> {
        INSTANCE;

        override fun convert(date: Date): ZonedDateTime =
            date.toInstant()
                .atZone(ZoneId.systemDefault())
                .truncatedTo(ChronoUnit.MILLIS)

    }

    @WritingConverter
    internal enum class ZonedDateTimeToDate : Converter<ZonedDateTime?, Date?> {
        INSTANCE;

        override fun convert(zonedDateTime: ZonedDateTime): Date =
            Date.from(zonedDateTime.toInstant())
    }
}