Struct GraphMlBackend 

pub struct GraphMlBackend { /* private fields */ }

GraphML file backend.

Implementations

impl GraphMlBackend

pub fn open<P: AsRef<Path>>(path: P) -> Self

Open or create a GraphML file.

Trait Implementations

impl GraphBackend for GraphMlBackend

type Error = GraphMlError

Error type returned by this backend.

fn init(&mut self) -> Result<(), Self::Error>

Initialize the backend (create tables/files, run migrations).

fn write_nodes(&mut self, nodes: &[Node]) -> Result<(), Self::Error>

Persist a batch of nodes.

fn write_edges(&mut self, edges: &[Edge]) -> Result<(), Self::Error>

Persist a batch of edges.

fn read_nodes(&self) -> Result<Vec<Node>, Self::Error>

Read all nodes.

fn read_edges(&self) -> Result<Vec<Edge>, Self::Error>

Read all edges.

fn find_nodes_by_type(&self, kind: NodeType) -> Result<Vec<Node>, Self::Error>

Find nodes by type.

fn neighbors( &self, node_id: &str, edge_type: Option<EdgeType>, ) -> Result<Vec<Edge>, Self::Error>

Find outgoing edges from a node, optionally filtered by edge type.

fn clear(&mut self) -> Result<(), Self::Error>

Clear all data.