What is the proper way to deserialize a List of things?

I’ve a data class and a request which returns a list of these objects. What is the proper way to deserialize the list? I don’t want to write an explicit deserializer just for List<CommitStatus>

I tried to do automatic deserialization with .httpGet().responseObject<List<CommitStatus>> { ... } It returns a list of things nicely, but then it fails when accessing the list elements.

java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap cannot be cast to io.smartly.balex.receiver.CommitStatus

This is my data class:

data class CommitStatus(val state: String, val context: String, val target_url: String) {
    class Deserializer : ResponseDeserializable<CommitStatus> {
        override fun deserialize(content: String): CommitStatus? {
            return Gson().fromJson(content, CommitStatus::class.java)
        }
    }
}

[kittinunf]

@deiga Thanks for reporting this.

Hmm I think I used Fuel to work with List of items before. Can we do something like this?

data class Issue(
            val id: Int = 0,
            val number: Int = 0,
            val title: String = "",
    ) {
        class Deserializer : ResponseDeserializable<Issue> {
            override fun deserialize(reader: Reader) = Gson().fromJson(reader, Issue::class.java)
        }

        class ListDeserializer : ResponseDeserializable<List<Issue>> {
            override fun deserialize(reader: Reader): List<Issue> {
                val type = object : TypeToken<List<Issue>>() {}.type
                return Gson().fromJson(reader, type)
            }
        }
    }

Usage

"https://api.github.com/repos/kittinunf/Fuel/issues".httpGet()
                .responseObject(Issue.ListDeserializer()) { _, _, result ->
                    update(result)
                }

Let me know if it doesn’t.

If this is useful, I think we can add this into the README.md so people can refer it as an example 😉

[SleeplessByte]

This is fixed properly with 2.0.0