value

type Context interface {
	// AuthenticatedData should return an array of bytes that describes the current value. If the value changes,
	// the transformer may report the value as unreadable or tampered. This may be nil if no such description exists
	// or is needed. For additional verification, set this to data that strongly identifies the value, such as
	// the key and creation version of the stored data.
	AuthenticatedData() []byte
}

type DefaultContext []byte

type PrefixTransformer struct {
	Prefix      []byte
	Transformer Transformer
}

type Read interface {
	// TransformFromStorage may transform the provided data from its underlying storage representation or return an error.
	// Stale is true if the object on disk is stale and a write to etcd should be issued, even if the contents of the object
	// have not changed.
	TransformFromStorage(ctx context.Context, data []byte, dataCtx Context) (out []byte, stale bool, err error)
}

type ResourceTransformers interface {
	TransformerForResource(resource schema.GroupResource) Transformer
}

type Transformer interface {
	Read
	Write
}

type Write interface {
	// TransformToStorage may transform the provided data into the appropriate form in storage or return an error.
	TransformToStorage(ctx context.Context, data []byte, dataCtx Context) (out []byte, err error)
}