Is Gson available in KMM? if not what would be the...

# multiplatform

[Suresh Maidaragi]

Is Gson available in KMM? if not what would be the alternative of Gson, I used Kotlin Serialization but not giving alternative of TypeToken
example use case is I wanted to convert below snippet completely into KMM specific by just using kotlin.serialization end up seeing typeToken not found

fun <T : Any> getTypeListv(typeArgument: KClass<T>): KType? {
    return TypeToken.getParameterized(List::class, typeArgument).type
}

[Joel Denke]

Just so I understand, whats the usecase of TypeToken? If I understand the question correct I think you only need that because of Gson, but not needed in kotlinx serialization.

[Suresh Maidaragi]

@Joel Denke I Wanted to achieve this mapping... without gson

fun <T : Any> listToJson(listObj: List<T>?, type: Class<T>): String? {
    return try {
        gson.toJson(listObj ?: listOf<T>(), getTypeList(type))
    } catch (e: JsonParseException) {
        PwLog.e("Parse Error (listToJson): Model Class :: $type", e)
        String.EMPTY
    }
}

fun <T : Any> getTypeList(typeArgument: Class<T>): Type? {
    return TypeToken.getParameterized(List::class.java, typeArgument).type
}

[Moussa]

Maybe something like this

@OptIn(InternalSerializationApi::class)
fun <T : Any> getTypeSerializer(typeArgument: KClass<T>): KSerializer<T> {
    val elementSerializer = typeArgument.serializer()
    return elementSerializer
}

Usage example:

val stringListSerializer = getTypeSerializer(String::class)
val stringList: List<String> = listOf("a", "b", "c")
val serializedStringList = Json.encodeToString(ListSerializer(stringListSerializer), stringList)

[Joel Denke]

I dont think need anything extra, just do:

val dataList = listOf(Data(42, "str"), Data(12, "test"))
val jsonList = Json.encodeToString(dataList)

As long as all objects in it is @Serializable, like Data in this sample.

[Joel Denke]

https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/builtin-classes.md#lists

[Moussa]

@Suresh Maidaragi, @Joel Denke is correct, in kotlinx.serialization you don't need that method. My previous answer was a respond to the main question but now that we have more details on your need, we don't need that implementation.