QuizViewModel (InterviewPrep (1.0))

java.lang.Object
- androidx.lifecycle.ViewModel
- - androidx.lifecycle.AndroidViewModel
  - - edu.cnm.deepdive.interviewprep.viewmodel.QuizViewModel

All Implemented Interfaces:

DefaultLifecycleObserver, LifecycleObserver
```
public class QuizViewModel
extends AndroidViewModel
implements DefaultLifecycleObserver
```
Implements the business logic behind the application. Interacts with the QuizRepository to perform CRUD operations on the server.

Constructor Summary

Constructors
Constructor Description

QuizViewModel(Application application)
Class constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`LiveData<Question>`	`getQuestion()`	Returns the local question variable.
`LiveData<List<Question>>`	`getQuestions()`	Returns the local questions variable.
`void`	`onStop(LifecycleOwner owner)`
`void`	`refreshQuestion()`	gets a list of all questions from the question repository.

Methods inherited from class androidx.lifecycle.AndroidViewModel
getApplication

Methods inherited from class androidx.lifecycle.ViewModel
onCleared

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface androidx.lifecycle.DefaultLifecycleObserver
onCreate, onDestroy, onPause, onResume, onStart

- Constructor Detail
  - QuizViewModel
```
public QuizViewModel(@NonNull
                     Application application)
```
    Class constructor. Instantiates local class variables. Additionally, gets a question from the server.
    
    Parameters:
    
    application - an application.
- Method Detail
  - getQuestions
```
public LiveData<List<Question>> getQuestions()
```
    Returns the local questions variable.
    
    Returns:
    
    a reactivex LiveData List object of type Question.
  - getQuestion
```
public LiveData<Question> getQuestion()
```
    Returns the local question variable.
    
    Returns:
    
    a reactivex LiveData object of type Question.
  - refreshQuestion
```
public void refreshQuestion()
```
    gets a list of all questions from the question repository. Additionally, subscribes to the result and puts the result in the local variable questions.
  - onStop
```
public void onStop(@NonNull
                   LifecycleOwner owner)
```
    Specified by:
    
    onStop in interface DefaultLifecycleObserver