UserViewModel with LiveData transformations

UserViewModel.kt

class UserViewModel() : ViewModel() {

    /**
     * The id of the user
     */
    private var userId: LiveData<Long>
  
    /**
     * The user
     */
    private var user: LiveData<User>

    init {
        // Get the user when id is changed
        user = Transformations.switchMap(userId) { id -> getUser(id) }
    }
  
    fun setUserId(id: Long) {
        userId.value = id
    }

    /**
     * Get the data
     */
    fun getUser() = user
}