Hibernate Attibute Converter for Enums

EnumTypeConverter.kt

abstract class EnumConverter<T : Enum<T>, V>(
    private val entries: EnumEntries<T>,
    private val dumpValue: (T) -> V
) : AttributeConverter<T, V> {
    override fun convertToDatabaseColumn(enumValue: T?): V? {
        return enumValue?.let { dumpValue(it) }
    }

    override fun convertToEntityAttribute(dbValue: V?): T? {
        return dbValue?.let { value ->
            entries.firstOrNull { dumpValue(it) == value }
                ?: throw IllegalArgumentException("Unknown enum value: $value")
        }
    }
}

// usage:

@Converter
class MyEnumConverter : EnumConverter<MyEnum, String>(MyEnum.entries, { it.id })