Protocol Buffer to Postgres JSONB - Kotlin Exposed

ProtoColumnType.kt

// Protocol Buffer (protobuf) V3 - Kotlin Exposed columnType
// Converts to and from jsonb fields in postgres. 
class ProtoColumnType(val message: Message) : ColumnType() {
    override fun sqlType() = "JSONB"

    override fun valueFromDB(value: Any): Any {
        if (value is PGobject) {
            return JsonFormat.parser().ignoringUnknownFields().merge(value.value, message.toBuilder())
        }
        throw RuntimeException("Can't parse object: ${value}")
    }

    override fun setParameter(stmt: PreparedStatement, index: Int, value: Any?) {
        val json = JsonFormat.printer().print(value as GeneratedMessageV3)
        val obj = PGobject()
        obj.type = "jsonb"
        obj.value = json
        stmt.setObject(index, obj)
    }
}