Struct DeltaSync 

pub struct DeltaSync;

Stateless helper for computing and applying index deltas.

Implementations

impl DeltaSync

pub fn new() -> Self

Create a new DeltaSync instance.

pub fn compute_delta( &self, old_index: &IndexSnapshot, new_index: &IndexSnapshot, ) -> IndexDelta

Compute the delta required to transform old_index into new_index.

An entry is considered added if it exists only in new_index. An entry is removed if it exists only in old_index. An entry is modified if it exists in both but the version number has increased in new_index.

pub fn apply_delta( &self, base: &mut IndexSnapshot, delta: &IndexDelta, ) -> Result<()>

Apply delta to base, mutating it in place.

Additions and modifications are upserted; removals are deleted. Returns an error if a removal targets an ID that does not exist in base (indicates a logic error in delta computation).

pub fn delta_size_bytes(&self, delta: &IndexDelta) -> u64

Estimate the serialised byte size of a delta.

Approximates: each removed ID costs 8 bytes; each added/modified entry uses VectorEntry::approx_bytes().

Trait Implementations

impl Clone for DeltaSync

fn clone(&self) -> DeltaSync

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DeltaSync

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DeltaSync

fn default() -> DeltaSync

Returns the “default value” for a type.

impl Copy for DeltaSync