[SOLVED] @Parcelize and enum classes - Overload resolution ambiguity

@Parcelize and enum classes - Overload resolution ambiguity

I need a clarification about @Parcelize annotation in Kotlin. I've declared this enum class:

 @Parcelize
 enum class Source : Parcelable {
    LIST, MAP
 }

The class is annotated with @Parcelize in order to implement Parcelable interface and it's working fine, however when I try to pass the Parceled class in an intent I have to force a re-casting to Parcelable, otherwise the compiler gives me a "Overload resolution ambiguity". error:

Overload resolution ambiguity. All these functions match. @RecentlyNonNull public open fun putExtra(name: String!, value: Parcelable!): Intent! defined in android.content.Intent @RecentlyNonNull public open fun putExtra(name: String!, value: Serializable!): Intent! defined in android.content.Intent

val intent = Intent(context, DestinationActivity::class.java)
intent.putExtra(Constants.RETAIL_DETAILS_CLICK_SOURCE_ID, StoreDetailsClicked.Source
                    .MAP as Parcelable)

Why is the compiler giving me this error?

Solution

This is because enums are Serializable by default, and when you add Parcelable, it matches both method signatures. You can add an extension function to resolve the ambiguity:

fun Intent.putParcelableExtra(key: String, value: Parcelable) {
    putExtra(key, value)
}

intent.putParcelableExtra(
    Constants.RETAIL_DETAILS_CLICK_SOURCE_ID, 
    StoreDetailsClicked.Source.MAP
)