joseprl89

enum MyError: ErrorType {
    case Test
}

enum Future<WrappedObject> {
    case Present(value:WrappedObject)
    case Error(error:ErrorType)
    case Finally
    case None
}

joseprl89

/*
The MIT License (MIT)

Copyright (c) 2016 Tigerspike

Permission is hereby granted, free of charge, to any person obtaining a copy of 
this software and associated documentation files (the "Software"), to deal in the 
Software without restriction, including without limitation the rights to use, copy, 
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
and to permit persons to whom the Software is furnished to do so, subject to the 

joseprl89

public void onCreate(Bundle savedInstanceState) {
    MyViewModel model = ViewModelProviders.of(this).get(MyViewModel.class);
    model.getUsers().observe(this, users -> {
        // update UI
    });
}

joseprl89

public static ViewModelProvider of(@NonNull Fragment fragment) {
    AndroidViewModelFactory factory = AndroidViewModelFactory.getInstance(checkApplication(checkActivity(fragment)));
    return new ViewModelProvider(ViewModelStores.of(fragment), factory);
}

joseprl89

final void put(String key, ViewModel viewModel) {
    ViewModel oldViewModel = mMap.get(key);
    if (oldViewModel != null) {
        oldViewModel.onCleared();
    }
    mMap.put(key, viewModel);
}

final ViewModel get(String key) {
    return mMap.get(key);

joseprl89

@NonNull
@Override
public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
    if (AndroidViewModel.class.isAssignableFrom(modelClass)) {
        try {
            return modelClass.getConstructor(Application.class).newInstance(mApplication);
        } catch ... {
            ...
        }
    }

joseprl89

public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
    try {
        return modelClass.newInstance();
    } catch (InstantiationException e) {
        ...
    }
}

joseprl89

public <T extends ViewModel> T get(@NonNull Class<T> modelClass) {
    String canonicalName = modelClass.getCanonicalName();
    if (canonicalName == null) {
        throw new IllegalArgumentException("Local and anonymous classes can not be ViewModels");
    }
    return get(DEFAULT_KEY + ":" + canonicalName, modelClass);
}

public <T extends ViewModel> T get(@NonNull String key, @NonNull Class<T> modelClass) {
    ViewModel viewModel = mViewModelStore.get(key);

joseprl89

public static ViewModelProvider of(@NonNull Fragment fragment) {
    AndroidViewModelFactory factory = AndroidViewModelFactory.getInstance(checkApplication(checkActivity(fragment)));
    return new ViewModelProvider(ViewModelStores.of(fragment), factory);
}

joseprl89

public static ViewModelStore of(@NonNull Fragment fragment) {
    if (fragment instanceof ViewModelStoreOwner) {
        return ((ViewModelStoreOwner) fragment).getViewModelStore();
    }
    return holderFragmentFor(fragment).getViewModelStore();
}

...

public static HolderFragment holderFragmentFor(Fragment fragment) {