I'm using kotlinx.serialization (JVM) for JSON des...

# ktor

[Ben Woodworth]

I'm using kotlinx.serialization (JVM) for JSON deserialization, and I'm getting this error when I make a GET request:
java.lang.UnsupportedOperationException: The only generic classes supported for now are standard collections, got class class ResponseEnvelope

It looks like the solution to this was to use KotlinxSerializer.setMapper(...) in the HttpClientConfig, but that's been deprecated.

Here is the erroring line of code:
https://github.com/BenWoodworth/GroupMe.kt/tree/63b918c8d5a6c0a4aa3316ab76214beb72986e3d/src/main/kotlin/net/benwoodworth/groupme/GroupMe.kt#L75
Here is ResponseEnvelope, the class I want to deserialize:
https://github.com/BenWoodworth/GroupMe.kt/tree/63b918c8d5a6c0a4aa3316ab76214beb72986e3d/src/main/kotlin/net/benwoodworth/groupme/ResponseEnvelope.kt
Here is the ktor HttpClient declaration:
https://github.com/BenWoodworth/GroupMe.kt/tree/63b918c8d5a6c0a4aa3316ab76214beb72986e3d/src/main/kotlin/net/benwoodworth/groupme/GroupMe.kt#L53-L61
And here is my build.gradle:
https://github.com/BenWoodworth/GroupMe.kt/tree/63b918c8d5a6c0a4aa3316ab76214beb72986e3d/build.gradle

Any idea how I might be able to fix this?

[Dominaezzz]

setMapper wouldn't help here anyway. You'll have to pass in the serializer at call site. I'll find you an example.

[Dominaezzz]

val responseStr = client.get<String> {
    url("$API_V3/users/me")
}

val response = Json.parse(ResponseEnvelope.serializer(JsonObjectSerializer), responseStr)