Struct NullGraphAccessor 

pub struct NullGraphAccessor;

A null implementation of GraphAccessor that returns no results.

Used when no graph storage is configured.

Trait Implementations

impl Clone for NullGraphAccessor

fn clone(&self) -> NullGraphAccessor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NullGraphAccessor

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

Formats the value using the given formatter.

impl Default for NullGraphAccessor

fn default() -> NullGraphAccessor

Returns the “default value” for a type.

impl GraphAccessor for NullGraphAccessor

fn neighbors( &self, _node: EntityId, _direction: Direction, ) -> GraphAccessResult<Vec<NeighborResult>>

Get neighbors of a node in the specified direction.

fn neighbors_by_type( &self, _node: EntityId, _direction: Direction, _edge_type: &EdgeType, ) -> GraphAccessResult<Vec<NeighborResult>>

Get neighbors filtered by edge type.

fn neighbors_by_types( &self, _node: EntityId, _direction: Direction, _edge_types: &[EdgeType], ) -> GraphAccessResult<Vec<NeighborResult>>

Get neighbors filtered by multiple edge types.

fn expand_all( &self, _node: EntityId, _direction: Direction, _min_depth: usize, _max_depth: Option<usize>, _edge_types: Option<&[EdgeType]>, ) -> GraphAccessResult<Vec<TraversalResult>>

Perform multi-hop expansion from a node.

fn find_paths( &self, _start: EntityId, _config: &PathFindConfig, ) -> GraphAccessResult<Vec<PathMatchResult>>

Find paths matching a pattern from a starting node.

impl Copy for NullGraphAccessor