Struct SearchEngine 

pub struct SearchEngine {
    pub bm25: Bm25Index,
    pub fuzzy: FuzzyIndex,
    pub rrf: RrfFusion,
}

Unified search engine combining multiple strategies

This engine supports persistence via save() and load() methods. The engine stores both BM25 and fuzzy indices in separate files within a directory.

Fields

bm25: Bm25Index

BM25 lexical index

fuzzy: FuzzyIndex

Fuzzy search index

rrf: RrfFusion

RRF fusion for hybrid search

Implementations

impl SearchEngine

pub fn new() -> Self

Create a new search engine

pub fn index_document(&mut self, doc: &Document)

Index a document for all search strategies

pub fn index_documents(&mut self, docs: &[Document])

Index multiple documents

pub fn remove_document(&mut self, id: &str)

Remove a document from all indices

pub fn search_bm25(&self, query: &str, top_k: usize) -> Vec<(String, f32)>

Perform BM25 search

pub fn search_fuzzy(&self, query: &str, top_k: usize) -> Vec<(String, f32)>

Perform fuzzy search

pub fn search_hybrid( &self, query: &str, semantic_results: &[(String, f32)], weights: &HybridWeights, top_k: usize, ) -> Vec<(String, f32)>

Perform hybrid search with configurable weights

semantic_results should be pre-computed from the vector store

pub fn search_bm25_with_correction( &self, query: &str, top_k: usize, ) -> (Vec<(String, f32)>, String, Vec<QueryCorrection>)

Perform BM25 search with automatic query typo correction

This corrects misspelled words in the query using the vocabulary built from indexed documents, then performs BM25 search with the corrected query.

Returns a tuple of (results, corrected_query, corrections_made)

pub fn search_hybrid_with_correction( &self, query: &str, semantic_results: &[(String, f32)], weights: &HybridWeights, top_k: usize, ) -> (Vec<(String, f32)>, String, Vec<QueryCorrection>)

Perform hybrid search with automatic query typo correction

This corrects misspelled words in the query, then performs hybrid search combining semantic, BM25, and fuzzy results.

Note: semantic_results should be computed using the corrected query for best results.

Returns a tuple of (results, corrected_query, corrections_made)

pub fn clear(&mut self)

Clear all indices

pub fn len(&self) -> usize

Get the number of indexed documents

pub fn is_empty(&self) -> bool

Check if the index is empty

pub fn save<P: AsRef<Path>>(&self, dir: P) -> Result<()>

Save all indices to a directory

Creates the directory if it doesn’t exist. Saves:

• bm25_index.json - BM25 lexical index
• fuzzy_index.json - Fuzzy search index

Errors

Returns an error if the directory cannot be created or files cannot be written.

pub fn load<P: AsRef<Path>>(dir: P) -> Result<Self>

Load all indices from a directory

Errors

Returns an error if the files cannot be read or deserialization fails.

pub fn load_or_new<P: AsRef<Path>>(dir: P) -> Self

Load indices from a directory if they exist, otherwise return a new empty engine

Trait Implementations

impl Debug for SearchEngine

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

Formats the value using the given formatter.

impl Default for SearchEngine

fn default() -> SearchEngine

Returns the “default value” for a type.