{\"customerId\":\"123\",\"id\":\"registration\",\"value\":0,\"balance\":0,\"expirationDate\":1675122800125}

Please how to convert the above string to this Promotion object

sealed class Promotion(customerId: String, id: String, value: BigDecimal, balance: BigDecimal, expirationDate: Timestamp)

Looks like a JSON string, so you could use something like #serialization or #jackson-kotlin to deserialize it to an object.

can i use fasterxml?

The #jackson-kotlin module is an extension for the FasterXML Jackson library to enable it to work better with Kotlin classes. Yes, you could use it for this.

okay thank you, let me try

👍 that should work. You might need to make your class a

data

class instead of a

sealed

class, though.

and also

@Serializable

right?

You don’t need that annotation if you’re using Jackson. That would only be needed if you choose to use Kotlin #serialization instead.

ohk, thank you Sir

That looks a bit odd. It seems like a list containing two objects, but a JSON list is supposed to be in square brackets

[]

, not braces

{}

. If you had a valid JSON list, you could do

jacksonObjectMapper().readValue<List<Promotion>>(promotions)

. If your list really does have braces instead of square brackets, it’s not valid JSON and you would need to fix it before passing it to a JSON deserializer.

ohk, thank you Sir