Struct ObjectReadSnapshot 

pub struct ObjectReadSnapshot { /* private fields */ }

Read-only object access for one operation’s lifetime (RFC 111 §6.1). Takes one decoded index snapshot at construction and never re-decodes – correct because a reader never writes, so it can never observe its own write as missing the way a writer holding a stale snapshot could (RFC 111 Q3). A snapshot taken here may miss an object a concurrent writer appends after construction; that is verify’s own already-documented point-in-time semantics, unchanged by this type (RFC 111 Q4).

Implementations

impl ObjectReadSnapshot

pub fn open(layout: &RepositoryLayout) -> Result<Self>

Open a read-only snapshot of layout’s object index, decoding it exactly once.

pub fn contains_object(&self, object_type: ObjectType, id: ObjectId) -> bool

Return true if an object with this id and type is indexed, as of when this snapshot was taken.

Trait Implementations

impl ObjectReader for ObjectReadSnapshot

fn read_object(&self, id: ObjectId) -> Result<Option<ObjectEnvelope>>

Read an object by ID.

fn read_typed( &self, id: ObjectId, object_type: ObjectType, ) -> Result<Option<ObjectEnvelope>>

Read and require a specific object type. Default-implemented in terms of read_object alone (RFC 111 §6.1: every implementor – FileObjectStore, ObjectReadSnapshot, ObjectWriteSession, MemoryObjectStore – gets this for free, and any function generic over impl ObjectReader can call it without depending on a concrete type). One body, not one per implementor (Stage 1 review v1 §3): every concrete type’s own read_typed delegates here too.