Struct TermIndex 

pub struct TermIndex { /* private fields */ }

An inverted index mapping tokenized terms to posting lists (sorted node ID arrays).

Implementations

impl TermIndex

pub fn new() -> Self

Create an empty term index.

pub fn build(graph: &MemoryGraph, tokenizer: &Tokenizer) -> Self

Build the index from all node contents in the graph.

pub fn get(&self, term: &str) -> &[(u64, u32)]

Look up a term. Returns (node_id, term_frequency) pairs.

pub fn doc_frequency(&self, term: &str) -> usize

Number of nodes containing a term (document frequency).

pub fn doc_count(&self) -> u64

Total number of indexed documents.

pub fn avg_doc_length(&self) -> f32

Average document length.

pub fn term_count(&self) -> usize

Number of unique terms.

pub fn add_node(&mut self, event: &CognitiveEvent)

Add a single node to the index incrementally.

pub fn remove_node(&mut self, id: u64)

Remove a node from the index.

pub fn clear(&mut self)

Clear the index.

pub fn rebuild(&mut self, graph: &MemoryGraph)

Rebuild the index from a graph.

pub fn to_bytes(&self) -> Vec<u8>

Serialize the term index to bytes for file writing.

pub fn from_bytes(data: &[u8]) -> Option<Self>

Deserialize a term index from bytes.

Trait Implementations

impl Default for TermIndex

fn default() -> Self

Returns the “default value” for a type.