// Get retrieves the StorageClass from the index for a given name.
func (s *storageClassLister) Get(name string) (*storage.StorageClass, error) {
	key := &storage.StorageClass{ObjectMeta: api.ObjectMeta{Name: name}}
	obj, exists, err := s.indexer.Get(key)
	if err != nil {
		return nil, err
	}
	if !exists {
		return nil, errors.NewNotFound(storage.Resource("storageclass"), name)
	}
	return obj.(*storage.StorageClass), nil
}

func (p StorageRESTStorageProvider) v1beta1Storage(apiResourceConfigSource genericapiserver.APIResourceConfigSource, restOptionsGetter RESTOptionsGetter) map[string]rest.Storage {
	version := storageapiv1beta1.SchemeGroupVersion

	storage := map[string]rest.Storage{}

	if apiResourceConfigSource.ResourceEnabled(version.WithResource("storageclasses")) {
		storageClassStorage := storageclassetcd.NewREST(restOptionsGetter(storageapi.Resource("storageclasses")))
		storage["storageclasses"] = storageClassStorage
	}

	return storage
}

// NewREST returns a RESTStorage object that will work against persistent volumes.
func NewREST(opts generic.RESTOptions) *REST {
	prefix := "/" + opts.ResourcePrefix

	newListFunc := func() runtime.Object { return &storageapi.StorageClassList{} }
	storageInterface, dFunc := opts.Decorator(
		opts.StorageConfig,
		cachesize.GetWatchCacheSizeByResource(cachesize.StorageClasses),
		&storageapi.StorageClass{},
		prefix,
		storageclass.Strategy,
		newListFunc,
		storageclass.GetAttrs,
		storage.NoTriggerPublisher,
	)

	store := &genericregistry.Store{
		NewFunc:     func() runtime.Object { return &storageapi.StorageClass{} },
		NewListFunc: newListFunc,
		KeyRootFunc: func(ctx api.Context) string {
			return prefix
		},
		KeyFunc: func(ctx api.Context, name string) (string, error) {
			return genericregistry.NoNamespaceKeyFunc(ctx, prefix, name)
		},
		ObjectNameFunc: func(obj runtime.Object) (string, error) {
			return obj.(*storageapi.StorageClass).Name, nil
		},
		PredicateFunc:           storageclass.MatchStorageClasses,
		QualifiedResource:       storageapi.Resource("storageclasses"),
		EnableGarbageCollection: opts.EnableGarbageCollection,
		DeleteCollectionWorkers: opts.DeleteCollectionWorkers,

		CreateStrategy:      storageclass.Strategy,
		UpdateStrategy:      storageclass.Strategy,
		DeleteStrategy:      storageclass.Strategy,
		ReturnDeletedObject: true,

		Storage:     storageInterface,
		DestroyFunc: dFunc,
	}

	return &REST{store}
}

// NewREST returns a RESTStorage object that will work against persistent volumes.
func NewREST(optsGetter generic.RESTOptionsGetter) *REST {
	store := &genericregistry.Store{
		NewFunc:     func() runtime.Object { return &storageapi.StorageClass{} },
		NewListFunc: func() runtime.Object { return &storageapi.StorageClassList{} },
		ObjectNameFunc: func(obj runtime.Object) (string, error) {
			return obj.(*storageapi.StorageClass).Name, nil
		},
		PredicateFunc:     storageclass.MatchStorageClasses,
		QualifiedResource: storageapi.Resource("storageclasses"),

		CreateStrategy:      storageclass.Strategy,
		UpdateStrategy:      storageclass.Strategy,
		DeleteStrategy:      storageclass.Strategy,
		ReturnDeletedObject: true,
	}
	options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: storageclass.GetAttrs}
	if err := store.CompleteWithOptions(options); err != nil {
		panic(err) // TODO: Propagate error up
	}

	return &REST{store}
}