Can retrofit support template well?

[markwang1971]

interface GetRadioListApi {
@get(SUB_URL)
suspend fun getRadioList(@QueryMap queryMap: BaseRequest): RadioListResponse
data class RadioListResponse(val msg: String, val ret: Int, val sub_ret: Int)
}
publicRadioListApi.getRadioList(params) does work well.

But the following does not work.
interface GetRadioListApi {
@get(SUB_URL)
suspend fun < T > getRadioList(@QueryMap queryMap: BaseRequest): T
data class RadioListResponse(val msg: String, val ret: Int, val sub_ret: Int)
}

The compiling is no any problem. But publicRadioListApi.getRadioList<GetRadioListApi.RadioListResponse>(params) always returns "Network error: java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap cannot be cast to com.bmwgroup.apinext.music.backend.webapi.radio.GetRadioListApi$RadioGroup"

Is it a valid case?

[JakeWharton]

There is no way to access the real value of T which is erased to Object by the compiler. This is why Gson is returning a map (or a list or a scalar), it has no type information.

[markwang1971]

thanks for your reply!

[summit234]

There is no way to access the real value of T which is erased to Object by the compiler. This is why Gson is returning a map (or a list or a scalar), it has no type information.

thanks

[DAMIT826]

Thanks