Extending DeepLink annotations

[4gus71n]

I have two screens (activities) working under A/B tests. They should share the same deeplink, the only difference is that if a feature flag is enabled, it should show one activity and if not, show the other.

How can I extend the annotations in order to implement this?

Ideally I would like to have something like:

@AppDeepLink(value = "invite/{id}", ifFeatureFlagTrue = "myResource#useA.bool")
public class InviteActivityA ...

@AppDeepLink(value = "invite/{id}", ifFeatureFlagFalse = "myResource#useA.bool")
public class InviteActivityB ...

Then implement the logic to grab the feature flag value in the loader or somewhere. By the way, I'm using Swrve for the feature flags.

[chantellosejo]

This is quite old but I would suggest creating a static function (or Kotlin object nowadays) for the deep link, then inside the handleDeepLink function, check your feature flag and launch the appropriate intent. I think inside the annotation is the wrong place for this logic.

Example (this uses Dagger/Hilt for injection of the featureFlag):

@AppDeepLink("invite/{id}")
object InviteDeepLinkHandler : DeepLinkHandler<Args> {

    @EntryPoint
    @InstallIn(SingletonComponent::class)
    interface Dependencies {
        fun getFeatureFlag(): FeatureFlag
    }

    private fun getDependencies(@ApplicationContext context: Context): Dependencies = EntryPointAccessors.fromApplication(
        context,
        Dependencies::class.java
    )

    data class Args(@DeeplinkParam(name ="id", DeepLinkParamType.Path) val id: String)
    
    override fun handleDeepLink(context: Context, deepLinkArgs: Args) {
        val featureFlag = getDependencies(context).getFeatureFlag();
        
        if (featureFlag.showActivityA) {
            context.startActivity(Intent(context, InviteActivityA::class.java))
        } else {
            context.startActivity(Intent(context, InviteActivityB::class.java))
        }
    }
}