I’m building an API using Quarkus + Kotlin for learning purpose and i’m having a problem **deserializing **a response to my DTO classes. Apparently data is not being copied to DTO properties, and the DTO is returning all blank, just as created on the default constructors.

Actually the DTO classes are using two Lombok annotations, @NoArgs and @AllArgs for constructors, but, i read on some forum that Lombok needs some adaptations to work with Kotlin. Then, i tried switch DTOs to Java classes and it worked!

Theres anything on Kotlin needed to deserealize responses to classes correctly?

The API is consuming another API of Currency Quotation data, using Rest Client, that returns an response as the example below:

{
  "USDBRL": {
    "code": "USD",
    "codein": "BRL",
    "name": "Dólar Americano/Real Brasileiro",
    "high": "5.1684",
    "low": "5.1603",
    "varBid": "-0.0004",
    "pctChange": "-0.01",
    "bid": "5.1602",
    "ask": "5.1612",
    "timestamp": "1716935404",
    "create_date": "2024-05-28 19:30:04"
  }
}

And thats the code of the DTOs **Kotlin **classes:

@NoArgsConstructor
@AllArgsConstructor
class CurrencyPriceDTO (
    USDBRL: USDBRL
){

    constructor(): this(USDBRL())

    val USDBRL = USDBRL
}

@NoArgsConstructor
@AllArgsConstructor
class USDBRL (
    code: String,
    codein: String,
    name: String,
    high: String,
    low: String,
    varBid: String,
    pctChange: String,
    bid: String,
    ask: String,
    timestamp: String,
    create_date: String
){

    constructor(): this(
        "",
        "",
        "",
        "",
        "",
        "",
        "",
        "",
        "",
        "",
        ""
    )

    val code = code
    val codein = codein
    val name = name
    val high = high
    val low = low
    val varBid = varBid
    val pctChange = pctChange
    val bid = bid
    val ask = ask
    val timestamp = timestamp
    val create_date = create_date
}

When a read the information about the incompatibillity of Lombok with Kotlin, i also tried to implement those default constructors. But, the problem still happen.