Method register_entity

atomic-core/src/pristine/txn/write/mod.rs:782–811

Register an entity in the identity tables. Creates INTERNAL (hash → id), EXTERNAL (id → hash), and NODE_TYPES (id → type) entries. Returns existing id if already registered.

(&mut self, hash: &Hash, entity_type: u8)

    /// Creates INTERNAL (hash → id), EXTERNAL (id → hash), and NODE_TYPES (id → type)
    /// entries. Returns existing id if already registered.
    fn register_entity(&mut self, hash: &Hash, entity_type: u8) -> PristineResult<NodeId> {
        // Check if already registered
        {
            let table = self.txn.open_table(INTERNAL)?;
            let result = table.get(hash.as_bytes())?;
            if let Some(value) = result {
                return Ok(NodeId::new(value.value()));
            }
        }

        // Allocate a new ID
        let id = self.next_node_id.fetch_add(1, Ordering::SeqCst);
        let node_id = NodeId::new(id);

        // Insert into both tables
        {
            let mut external = self.txn.open_table(EXTERNAL)?;
            external.insert(id, hash.as_bytes())?;
        }
        {
            let mut internal = self.txn.open_table(INTERNAL)?;
            internal.insert(hash.as_bytes(), id)?;
        }
        {
            let mut node_types = self.txn.open_table(NODE_TYPES)?;
            node_types.insert(id, entity_type)?;
        }

        Ok(node_id)
    }
}

// MutTxnT Implementation