Trait QueryPreprocessor 

pub trait QueryPreprocessor: Send + Sync {
    // Required methods
    fn preprocess(&self, query: &str) -> Result<Vec<String>>;
    fn name(&self) -> &str;
}

A query preprocessor that transforms or expands queries before retrieval.

Required Methods

fn preprocess(&self, query: &str) -> Result<Vec<String>>

Preprocess a query, potentially returning multiple expanded queries.

fn name(&self) -> &str

Get the name of this preprocessor for debugging.

Implementors

impl QueryPreprocessor for ChainedPreprocessor

impl QueryPreprocessor for PassthroughPreprocessor

impl<E: QueryExpander> QueryPreprocessor for MultiQueryPreprocessor<E>

impl<G: HypotheticalGenerator> QueryPreprocessor for HydePreprocessor<G>