hermes_core/query/
boost.rs

1//! Boost query - multiplies the score of the inner query
2
3use std::sync::Arc;
4
5use crate::segment::SegmentReader;
6use crate::{DocId, Score};
7
8use super::{CountFuture, Query, Scorer, ScorerFuture};
9
10/// Boost query - multiplies the score of the inner query
11#[derive(Clone)]
12pub struct BoostQuery {
13    pub inner: Arc<dyn Query>,
14    pub boost: f32,
15}
16
17impl std::fmt::Debug for BoostQuery {
18    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
19        f.debug_struct("BoostQuery")
20            .field("boost", &self.boost)
21            .finish()
22    }
23}
24
25impl BoostQuery {
26    pub fn new(query: impl Query + 'static, boost: f32) -> Self {
27        Self {
28            inner: Arc::new(query),
29            boost,
30        }
31    }
32}
33
34impl Query for BoostQuery {
35    fn scorer<'a>(
36        &self,
37        reader: &'a SegmentReader,
38        limit: usize,
39        predicate: Option<super::DocPredicate<'a>>,
40    ) -> ScorerFuture<'a> {
41        let inner = self.inner.clone();
42        let boost = self.boost;
43        Box::pin(async move {
44            let inner_scorer = inner.scorer(reader, limit, predicate).await?;
45            Ok(Box::new(BoostScorer {
46                inner: inner_scorer,
47                boost,
48            }) as Box<dyn Scorer + 'a>)
49        })
50    }
51
52    #[cfg(feature = "sync")]
53    fn scorer_sync<'a>(
54        &self,
55        reader: &'a SegmentReader,
56        limit: usize,
57        predicate: Option<super::DocPredicate<'a>>,
58    ) -> crate::Result<Box<dyn Scorer + 'a>> {
59        let inner_scorer = self.inner.scorer_sync(reader, limit, predicate)?;
60        Ok(Box::new(BoostScorer {
61            inner: inner_scorer,
62            boost: self.boost,
63        }) as Box<dyn Scorer + 'a>)
64    }
65
66    fn count_estimate<'a>(&self, reader: &'a SegmentReader) -> CountFuture<'a> {
67        let inner = self.inner.clone();
68        Box::pin(async move { inner.count_estimate(reader).await })
69    }
70}
71
72struct BoostScorer<'a> {
73    inner: Box<dyn Scorer + 'a>,
74    boost: f32,
75}
76
77impl Scorer for BoostScorer<'_> {
78    fn doc(&self) -> DocId {
79        self.inner.doc()
80    }
81
82    fn score(&self) -> Score {
83        self.inner.score() * self.boost
84    }
85
86    fn advance(&mut self) -> DocId {
87        self.inner.advance()
88    }
89
90    fn seek(&mut self, target: DocId) -> DocId {
91        self.inner.seek(target)
92    }
93
94    fn size_hint(&self) -> u32 {
95        self.inner.size_hint()
96    }
97}
hermes_core/query/boost.rs

hermes_core/query/
boost.rs
