Hi everyone, do you know whether there is a way to extract KClass from a type argument from generic ...

# getting-started

[Daniel Felipe Henao Toro]

Hi everyone, do you know whether there is a way to extract KClass from a type argument from generic class, for instance you have this code:

return exchangeWithRetry(
            budgetSplitterUrl,
            HttpMethod.PUT,
            budgetSplitter,
            XandrFlatResponse<XandrBudgetSplitter>()::class
        ).splits ?: emptyList()

fun <T> exchangeWithRetry(
   uri: String,
   method: HttpMethod,
   body: Any,
   responseClass: KClass<T>
) {
   //Here how can I know KClass of this class XandrBudgetSplitter from this complete XandrFlatResponse<XandrBudgetSplitter>()::class
}

If anyone knows how to do that, I really appreciate it. Thanks

[Joffrey]

There is no such thing as the KClass for XandrFlatResponse<XandrBudgetSplitter>, because that expression is more general type, not just a class. Actually, XandrFlatResponse<XandrBudgetSplitter>()::class is a very strange way to get a class, and it already is just XandrFlatResponse, as if you had specified just XandrFlatResponse::class. The correct type to access the full type information would be KType

[Daniel Felipe Henao Toro]

Ok Joffrey thanks for guidance 🙂

[Joffrey]

Here is an example using `KType`:

return exchangeWithRetry(
            budgetSplitterUrl,
            HttpMethod.PUT,
            budgetSplitter,
            typeOf<XandrFlatResponse<XandrBudgetSplitter>>,
        ).splits ?: emptyList()

fun <T> exchangeWithRetry(
   uri: String,
   method: HttpMethod,
   body: Any,
   responseType: KType,
) {
   val typeArg = responseType.arguments[0].type
   // ...
}

[Daniel Felipe Henao Toro]

Ohh interesting, I will check this example thanks so much