Does serialization not support generics I am working on a mu | Serialization | Kotlinlang

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#serialization

Gurupad Mamadapur [FH]

Gurupad Mamadapur [FH]

2 years ago

Does serialization not support generics? I am working on a multiplatform project (Targetting Android and JS) -

@Serializable
class BaseResponse<T> {

    val data: T? = null

    @SerialName("status")
    val isSuccess: Boolean = false

    @SerialName("session")
    val isSessionExpire: Boolean = false

    @SerialName("message")
    val message: String = ""
}

Can this be serialized -

BaseResponse<String>

? There is an error logged ->

java.lang.UnsupportedOperationException: The only generic classes supported for now are standard collections
got class class dto.BaseResponse (Kotlin reflection is not available)

I did read the documentation regarding requiring a custom serializer in case of generics but wasn't able to understand it. Any help would be much appreciated.

r

rnentjes

2 years ago

I have been able to serialize generics, the serialization call looks something like this:

val jsonString: String = json.stringify(
  BaseResponse.serializer(
    String.serializer()
  ),
  baseResponseInstance
)

That json instance is of type kotlinx.serialization.json.Json

Gurupad Mamadapur [FH]

Gurupad Mamadapur [FH]

2 years ago

@rnentjes Sorry, I meant to deserialize to BaseResponse<T>.

r

rnentjes

2 years ago

I think you need to know the type of T before you can do that (because of type erasure), but it can be just a super type. So if you can let the content of your responses all inherit from some super class you can make this work.

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