What is the most elegant way to choose what service implementation must be used?

in my controller, I need to choose what service implementation I need to use on spring. Before I was encapsulating this code in a factory, but I think that its not a good practice...

@Component
public class StoreServiceFactory {

    @Autowired
    private List<StoreService> storeServices;

    public StoreService getService(){

        if(isActiveSale){
            return storeServices.get("PublicStoreService")
        }

        return storeServices.get("PrivateStoreService")
    }
}

So I would like to encapsulate this behaviour to not care about inside my controller.. How can I get it??