mirror of
https://github.com/meilisearch/meilisearch.git
synced 2024-11-25 19:45:05 +08:00
feat: Introduce basic ranking rules
This commit is contained in:
Kerollmops
Clément Renault
parent
c037fb85a8
commit
d210e5d8db
7
Cargo.lock
generated
7
Cargo.lock
generated
@ -21,6 +21,11 @@ dependencies = [
|
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"memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "group-by"
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version = "0.1.0"
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source = "git+https://github.com/Kerollmops/group-by.git#7e432aa232834b650ca85ecd46056a43a0094dec"
|
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[[package]]
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name = "levenshtein_automata"
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version = "0.1.0"
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@ -65,6 +70,7 @@ version = "0.1.0"
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dependencies = [
|
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"bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)",
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||||
"group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)",
|
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"levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)",
|
||||
"serde 1.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde_derive 1.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -123,6 +129,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
"checksum bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bda13183df33055cbb84b847becce220d392df502ebe7a4a78d7021771ed94d0"
|
||||
"checksum byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "73b5bdfe7ee3ad0b99c9801d58807a9dbc9e09196365b0203853b99889ab3c87"
|
||||
"checksum fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)" = "<none>"
|
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"checksum group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)" = "<none>"
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"checksum levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)" = "<none>"
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"checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
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"checksum memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
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@ -16,3 +16,6 @@ branch = "op-builder-with-state"
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git = "https://github.com/Kerollmops/levenshtein-automata.git"
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branch = "custom-fst"
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features = ["fst_automaton"]
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[dependencies.group-by]
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git = "https://github.com/Kerollmops/group-by.git"
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7
raptor-bin/Cargo.lock
generated
7
raptor-bin/Cargo.lock
generated
@ -26,6 +26,11 @@ dependencies = [
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"memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "group-by"
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version = "0.1.0"
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source = "git+https://github.com/Kerollmops/group-by.git#7e432aa232834b650ca85ecd46056a43a0094dec"
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[[package]]
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name = "itoa"
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version = "0.4.1"
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@ -75,6 +80,7 @@ version = "0.1.0"
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dependencies = [
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"bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)",
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"group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)",
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"levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)",
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"serde 1.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde_derive 1.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -154,6 +160,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "73b5bdfe7ee3ad0b99c9801d58807a9dbc9e09196365b0203853b99889ab3c87"
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"checksum dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "09c3753c3db574d215cba4ea76018483895d7bff25a31b49ba45db21c48e50ab"
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"checksum fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)" = "<none>"
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"checksum group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)" = "<none>"
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"checksum itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c069bbec61e1ca5a596166e55dfe4773ff745c3d16b700013bcaff9a6df2c682"
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"checksum levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)" = "<none>"
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"checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
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@ -56,7 +56,7 @@ fn main() {
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attribute: attr,
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attribute_index: i as u32,
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};
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builder.insert(word, doc_index);
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builder.insert(word.to_lowercase(), doc_index);
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}
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}
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@ -16,7 +16,7 @@ use tokio_minihttp::{Request, Response, Http};
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use tokio_proto::TcpServer;
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use tokio_service::Service;
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use raptor::{DocIndexMap, OpWithStateBuilder, LevBuilder};
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use raptor::{DocIndexMap, RankedStream, LevBuilder};
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struct MainService {
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map: Arc<DocIndexMap>,
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@ -48,30 +48,18 @@ impl Service for MainService {
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automatons.push(lev);
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}
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let mut op = OpWithStateBuilder::new(self.map.values());
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for automaton in automatons.iter().cloned() {
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let stream = self.map.as_map().search(automaton).with_state();
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op.push(stream);
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}
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let mut stream = op.union();
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let mut limit = 20;
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let mut stream = RankedStream::new(&self.map, self.map.values(), automatons.clone());
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let mut body = String::new();
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body.push_str("<html><body>");
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while let Some((key, ivalues)) = stream.next() {
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match std::str::from_utf8(key) {
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Ok(key) => {
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for ivalue in ivalues {
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let i = ivalue.index;
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let state = ivalue.state;
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let distance = automatons[i].distance(state);
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body.push_str(&format!("<p>{:?} (dist: {:?}) {:?}</p>", key, distance, ivalue.values));
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}
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},
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Err(e) => eprintln!("{:?}", e),
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}
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while let Some(document_id) = stream.next() {
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if limit == 0 { break }
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body.push_str(&format!("<p>{:?}</p>", document_id));
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limit -= 1;
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}
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body.push_str("</body></html>");
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3
raptor-search/.gitignore
vendored
Normal file
3
raptor-search/.gitignore
vendored
Normal file
@ -0,0 +1,3 @@
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/target
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**/*.rs.bk
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188
raptor-search/Cargo.lock
generated
Normal file
188
raptor-search/Cargo.lock
generated
Normal file
@ -0,0 +1,188 @@
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[[package]]
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name = "bincode"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "byteorder"
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version = "1.2.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "cfg-if"
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version = "0.1.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "env_logger"
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version = "0.3.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "fst"
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version = "0.3.0"
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source = "git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state#6e0ab4e4ee5443cc55079996bf9f703086322c33"
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dependencies = [
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"byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "group-by"
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version = "0.1.0"
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source = "git+https://github.com/Kerollmops/group-by.git#7e432aa232834b650ca85ecd46056a43a0094dec"
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[[package]]
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name = "levenshtein_automata"
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version = "0.1.0"
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source = "git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst#5e8183a7634c4a0182ea7bb398140b2fe9854f77"
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dependencies = [
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"fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)",
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]
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[[package]]
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name = "libc"
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version = "0.2.42"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "log"
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version = "0.3.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"log 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "log"
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version = "0.4.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
|
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"cfg-if 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
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]
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|
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[[package]]
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name = "memmap"
|
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version = "0.6.2"
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
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]
|
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|
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[[package]]
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||||
name = "proc-macro2"
|
||||
version = "0.4.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "quote"
|
||||
version = "0.6.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "raptor"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)",
|
||||
"group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)",
|
||||
"levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)",
|
||||
"serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "raptor-search"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)",
|
||||
"raptor 0.1.0",
|
||||
"serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde"
|
||||
version = "1.0.66"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "serde_derive"
|
||||
version = "1.0.66"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"syn 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "0.14.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-xid"
|
||||
version = "0.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[metadata]
|
||||
"checksum bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bda13183df33055cbb84b847becce220d392df502ebe7a4a78d7021771ed94d0"
|
||||
"checksum byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "74c0b906e9446b0a2e4f760cdb3fa4b2c48cdc6db8766a845c54b6ff063fd2e9"
|
||||
"checksum cfg-if 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "405216fd8fe65f718daa7102ea808a946b6ce40c742998fbfd3463645552de18"
|
||||
"checksum env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "15abd780e45b3ea4f76b4e9a26ff4843258dd8a3eed2775a0e7368c2e7936c2f"
|
||||
"checksum fst 0.3.0 (git+https://github.com/Kerollmops/fst.git?branch=op-builder-with-state)" = "<none>"
|
||||
"checksum group-by 0.1.0 (git+https://github.com/Kerollmops/group-by.git)" = "<none>"
|
||||
"checksum levenshtein_automata 0.1.0 (git+https://github.com/Kerollmops/levenshtein-automata.git?branch=custom-fst)" = "<none>"
|
||||
"checksum libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)" = "b685088df2b950fccadf07a7187c8ef846a959c142338a48f9dc0b94517eb5f1"
|
||||
"checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
|
||||
"checksum log 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6fddaa003a65722a7fb9e26b0ce95921fe4ba590542ced664d8ce2fa26f9f3ac"
|
||||
"checksum memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
|
||||
"checksum proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "effdb53b25cdad54f8f48843d67398f7ef2e14f12c1b4cb4effc549a6462a4d6"
|
||||
"checksum quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e44651a0dc4cdd99f71c83b561e221f714912d11af1a4dff0631f923d53af035"
|
||||
"checksum serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "e9a2d9a9ac5120e0f768801ca2b58ad6eec929dc9d1d616c162f208869c2ce95"
|
||||
"checksum serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "0a90213fa7e0f5eac3f7afe2d5ff6b088af515052cc7303bd68c7e3b91a3fb79"
|
||||
"checksum syn 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c67da57e61ebc7b7b6fff56bb34440ca3a83db037320b0507af4c10368deda7d"
|
||||
"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
|
||||
"checksum winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "773ef9dcc5f24b7d850d0ff101e542ff24c3b090a9768e03ff889fdef41f00fd"
|
||||
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
18
raptor-search/Cargo.toml
Normal file
18
raptor-search/Cargo.toml
Normal file
@ -0,0 +1,18 @@
|
||||
[package]
|
||||
name = "raptor-search"
|
||||
version = "0.1.0"
|
||||
authors = ["Kerollmops <renault.cle@gmail.com>"]
|
||||
|
||||
[dependencies]
|
||||
env_logger = { version = "0.3", default-features = false }
|
||||
raptor = { path = ".." }
|
||||
serde = "1.0"
|
||||
serde_derive = "1.0"
|
||||
|
||||
[dependencies.fst]
|
||||
git = "https://github.com/Kerollmops/fst.git"
|
||||
branch = "op-builder-with-state"
|
||||
|
||||
[profile.release]
|
||||
lto = true
|
||||
debug = true
|
||||
34
raptor-search/src/main.rs
Normal file
34
raptor-search/src/main.rs
Normal file
@ -0,0 +1,34 @@
|
||||
extern crate env_logger;
|
||||
extern crate fst;
|
||||
extern crate raptor;
|
||||
|
||||
use std::{fs, env};
|
||||
use fst::Streamer;
|
||||
use raptor::{DocIndexMap, RankedStream, LevBuilder};
|
||||
|
||||
fn main() {
|
||||
drop(env_logger::init());
|
||||
|
||||
let lev_builder = LevBuilder::new();
|
||||
let map = {
|
||||
let fst = fs::read("map.fst").unwrap();
|
||||
let values = fs::read("values.vecs").unwrap();
|
||||
DocIndexMap::from_bytes(fst, &values).unwrap()
|
||||
};
|
||||
|
||||
let query = env::args().nth(1).expect("Please enter query words!");
|
||||
let query = query.to_lowercase();
|
||||
|
||||
println!("Searching for: {:?}", query);
|
||||
|
||||
let mut automatons = Vec::new();
|
||||
for query in query.split_whitespace() {
|
||||
let lev = lev_builder.build_automaton(query);
|
||||
automatons.push(lev);
|
||||
}
|
||||
|
||||
let mut stream = RankedStream::new(&map, map.values(), automatons);
|
||||
while let Some(document_id) = stream.next() {
|
||||
println!("{:?}", document_id);
|
||||
}
|
||||
}
|
||||
41
src/lib.rs
41
src/lib.rs
@ -1,10 +1,12 @@
|
||||
#[macro_use] extern crate serde_derive;
|
||||
extern crate bincode;
|
||||
extern crate fst;
|
||||
extern crate group_by;
|
||||
extern crate levenshtein_automata;
|
||||
extern crate serde;
|
||||
|
||||
pub mod map;
|
||||
pub mod rank;
|
||||
mod levenshtein;
|
||||
|
||||
pub use self::map::{Map, MapBuilder, Values};
|
||||
@ -12,12 +14,14 @@ pub use self::map::{
|
||||
OpBuilder, IndexedValues,
|
||||
OpWithStateBuilder, IndexedValuesWithState,
|
||||
};
|
||||
|
||||
pub use self::rank::{RankedStream};
|
||||
pub use self::levenshtein::LevBuilder;
|
||||
|
||||
pub type DocIndexMap = Map<DocIndex>;
|
||||
pub type DocIndexMapBuilder = MapBuilder<DocIndex>;
|
||||
|
||||
pub type DocumentId = u64;
|
||||
|
||||
/// This structure represent the position of a word
|
||||
/// in a document and its attributes.
|
||||
///
|
||||
@ -27,7 +31,7 @@ pub type DocIndexMapBuilder = MapBuilder<DocIndex>;
|
||||
pub struct DocIndex {
|
||||
|
||||
/// The document identifier where the word was found.
|
||||
pub document: u64,
|
||||
pub document: DocumentId,
|
||||
|
||||
/// The attribute identifier in the document
|
||||
/// where the word was found.
|
||||
@ -49,9 +53,16 @@ pub struct DocIndex {
|
||||
/// the way these structures are ordered between themselves.
|
||||
///
|
||||
/// The word in itself is not important.
|
||||
// TODO do data oriented programming ? very arrays ?
|
||||
#[derive(Debug, Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Hash)]
|
||||
pub struct Match {
|
||||
|
||||
/// The word index in the query sentence.
|
||||
/// Same as the `attribute_index` but for the query words.
|
||||
///
|
||||
/// Used to retrieve the automaton that match this word.
|
||||
pub query_index: u32,
|
||||
|
||||
/// The distance the word has with the query word
|
||||
/// (i.e. the Levenshtein distance).
|
||||
pub distance: u8,
|
||||
@ -63,12 +74,6 @@ pub struct Match {
|
||||
/// can not have more than `2^8` attributes.
|
||||
pub attribute: u8,
|
||||
|
||||
/// The word index in the query sentence.
|
||||
/// Same as the `attribute_index` but for the query words.
|
||||
///
|
||||
/// Used to retrieve the automaton that match this word.
|
||||
pub query_index: u32,
|
||||
|
||||
/// Where does this word is located in the attribute string
|
||||
/// (i.e. at the start or the end of the attribute).
|
||||
///
|
||||
@ -76,3 +81,23 @@ pub struct Match {
|
||||
/// this is because we index only the first 1000 words in an attribute.
|
||||
pub attribute_index: u32,
|
||||
}
|
||||
|
||||
impl Match {
|
||||
pub fn zero() -> Self {
|
||||
Match {
|
||||
query_index: 0,
|
||||
distance: 0,
|
||||
attribute: 0,
|
||||
attribute_index: 0,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn max() -> Self {
|
||||
Match {
|
||||
query_index: u32::max_value(),
|
||||
distance: u8::max_value(),
|
||||
attribute: u8::max_value(),
|
||||
attribute_index: u32::max_value(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -285,12 +285,14 @@ impl<'a, 'm, 'v, T: 'v + 'a, U: 'a> fst::Streamer<'a> for UnionWithState<'m, 'v,
|
||||
where
|
||||
U: Clone,
|
||||
{
|
||||
// TODO prefer returning (&[u8], index, value T, state) one by one
|
||||
type Item = (&'a [u8], &'a [IndexedValuesWithState<'a, T, U>]);
|
||||
|
||||
fn next(&'a mut self) -> Option<Self::Item> {
|
||||
match self.inner.next() {
|
||||
Some((s, ivalues)) => {
|
||||
self.outs.clear();
|
||||
self.outs.reserve(ivalues.len());
|
||||
for ivalue in ivalues {
|
||||
let index = ivalue.index;
|
||||
let values = unsafe { self.values.get_unchecked(ivalue.value as usize) };
|
||||
|
||||
372
src/rank.rs
Normal file
372
src/rank.rs
Normal file
@ -0,0 +1,372 @@
|
||||
use std::cmp::{self, Ordering};
|
||||
use std::{mem, vec};
|
||||
use std::collections::{HashSet, HashMap};
|
||||
use DocIndexMap;
|
||||
use fst;
|
||||
use levenshtein_automata::DFA;
|
||||
use map::{
|
||||
OpWithStateBuilder, UnionWithState,
|
||||
StreamWithStateBuilder,
|
||||
Values,
|
||||
};
|
||||
use {Match, DocIndex, DocumentId};
|
||||
use group_by::GroupBy;
|
||||
|
||||
const MAX_DISTANCE: usize = 8;
|
||||
|
||||
#[derive(Debug, Eq, Clone)]
|
||||
pub struct Document {
|
||||
document_id: DocumentId,
|
||||
matches: Vec<Match>,
|
||||
}
|
||||
|
||||
impl Document {
|
||||
pub fn new(doc: DocumentId, match_: Match) -> Self {
|
||||
Self::from_sorted_matches(doc, vec![match_])
|
||||
}
|
||||
|
||||
pub fn from_sorted_matches(doc: DocumentId, matches: Vec<Match>) -> Self {
|
||||
Self {
|
||||
document_id: doc,
|
||||
matches: matches,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl PartialEq for Document {
|
||||
fn eq(&self, other: &Self) -> bool {
|
||||
self.cmp(other) == Ordering::Equal
|
||||
}
|
||||
}
|
||||
|
||||
impl PartialOrd for Document {
|
||||
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
|
||||
Some(self.cmp(other))
|
||||
}
|
||||
}
|
||||
|
||||
impl Ord for Document {
|
||||
fn cmp(&self, other: &Self) -> Ordering {
|
||||
let lhs = DocumentScore::new(&self.matches);
|
||||
let rhs = DocumentScore::new(&other.matches);
|
||||
lhs.cmp(&rhs)
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Default, Eq, PartialEq, PartialOrd)]
|
||||
struct DocumentScore {
|
||||
typo: usize,
|
||||
words: usize,
|
||||
proximity: usize,
|
||||
attribute: usize,
|
||||
words_position: usize,
|
||||
}
|
||||
|
||||
impl Ord for DocumentScore {
|
||||
fn cmp(&self, other: &Self) -> Ordering {
|
||||
self.typo.cmp(&other.typo)
|
||||
.then(self.words.cmp(&other.words).reverse())
|
||||
.then(self.proximity.cmp(&other.proximity))
|
||||
.then(self.attribute.cmp(&other.attribute))
|
||||
.then(self.words_position.cmp(&other.words_position))
|
||||
// ~exact~ (see prefix option of the `DFA` builder)
|
||||
}
|
||||
}
|
||||
|
||||
fn min_attribute(matches: &[Match]) -> usize {
|
||||
let mut attribute = usize::max_value();
|
||||
for match_ in matches {
|
||||
if match_.attribute == 0 { return 0 }
|
||||
attribute = cmp::min(match_.attribute as usize, attribute);
|
||||
}
|
||||
attribute
|
||||
}
|
||||
|
||||
fn min_attribute_index(matches: &[Match]) -> usize {
|
||||
let mut attribute_index = usize::max_value();
|
||||
for match_ in matches {
|
||||
if match_.attribute_index == 0 { return 0 }
|
||||
attribute_index = cmp::min(match_.attribute_index as usize, attribute_index);
|
||||
}
|
||||
attribute_index
|
||||
}
|
||||
|
||||
impl DocumentScore {
|
||||
fn new(matches: &[Match]) -> Self {
|
||||
let mut score = DocumentScore::default();
|
||||
|
||||
let mut index = 0; // FIXME could be replaced by the `GroupBy::remaining` method
|
||||
for group in GroupBy::new(matches, |a, b| a.query_index == b.query_index) {
|
||||
index += group.len();
|
||||
|
||||
score.typo = cmp::max(group[0].distance as usize, score.typo);
|
||||
score.words += 1;
|
||||
|
||||
// FIXME distance is wrong if 2 different attributes matches
|
||||
if let Some(first_next_group) = (&matches[index..]).first() {
|
||||
score.proximity += attribute_proximity(first_next_group, &group[0]);
|
||||
}
|
||||
|
||||
score.attribute += min_attribute(group);
|
||||
score.words_position += min_attribute_index(group);
|
||||
}
|
||||
|
||||
score
|
||||
}
|
||||
}
|
||||
|
||||
fn proximity(first: usize, second: usize) -> usize {
|
||||
if first < second {
|
||||
cmp::min(second - first, MAX_DISTANCE)
|
||||
} else {
|
||||
cmp::min(first - second, MAX_DISTANCE) + 1
|
||||
}
|
||||
}
|
||||
|
||||
fn attribute_proximity(lhs: &Match, rhs: &Match) -> usize {
|
||||
if lhs.attribute != rhs.attribute {
|
||||
MAX_DISTANCE
|
||||
} else {
|
||||
let lhs_attr = lhs.attribute_index as usize;
|
||||
let rhs_attr = rhs.attribute_index as usize;
|
||||
proximity(lhs_attr, rhs_attr)
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Pool {
|
||||
returned_documents: HashSet<DocumentId>,
|
||||
documents: Vec<Document>,
|
||||
limitation: Limitation,
|
||||
}
|
||||
|
||||
#[derive(Debug, Copy, Clone)]
|
||||
enum Limitation {
|
||||
/// No limitation is specified.
|
||||
Unspecified {
|
||||
query_size: usize,
|
||||
},
|
||||
|
||||
/// The limitation is specified but not reached.
|
||||
Specified {
|
||||
/// The maximum number of results to return.
|
||||
limit: usize,
|
||||
|
||||
/// documents with a distance of zero which can be used
|
||||
/// in the step-by-step sort-and-return.
|
||||
///
|
||||
/// this field must be equal to the limit to reach
|
||||
/// the limitation
|
||||
matching_documents: usize,
|
||||
},
|
||||
|
||||
/// No more documents with a distance of zero
|
||||
/// can never be returned now.
|
||||
Reached {
|
||||
/// The number of remaining documents to return in order.
|
||||
remaining: usize,
|
||||
},
|
||||
}
|
||||
|
||||
impl Limitation {
|
||||
fn reached(&self) -> Option<usize> {
|
||||
match self {
|
||||
Limitation::Reached { remaining } => Some(*remaining),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
fn is_reached(&self) -> bool {
|
||||
self.reached().is_some()
|
||||
}
|
||||
|
||||
fn query_size(&self) -> usize {
|
||||
match *self {
|
||||
Limitation::Unspecified { query_size } => query_size,
|
||||
_ => 1,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Pool {
|
||||
pub fn new(query_size: usize) -> Self {
|
||||
Self {
|
||||
returned_documents: HashSet::new(),
|
||||
documents: Vec::new(),
|
||||
limitation: Limitation::Unspecified { query_size },
|
||||
}
|
||||
}
|
||||
|
||||
pub fn with_output_limit(query_size: usize, limit: usize) -> Self {
|
||||
assert_eq!(query_size, 1, "limit can only be specified if the query size is 1");
|
||||
Self {
|
||||
returned_documents: HashSet::new(),
|
||||
documents: Vec::new(),
|
||||
limitation: Limitation::Specified {
|
||||
limit: limit,
|
||||
matching_documents: 0,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
pub fn extend(&mut self, mut matches: HashMap<DocumentId, Vec<Match>>) {
|
||||
for doc in self.documents.iter_mut() {
|
||||
if let Some(matches) = matches.remove(&doc.document_id) {
|
||||
doc.matches.extend(matches);
|
||||
doc.matches.sort_unstable();
|
||||
}
|
||||
}
|
||||
|
||||
matches.retain(|id, _| !self.returned_documents.contains(id));
|
||||
self.documents.reserve(matches.len());
|
||||
|
||||
let mut new_matches = 0;
|
||||
for (id, mut matches) in matches.into_iter() {
|
||||
matches.sort_unstable();
|
||||
if matches[0].distance == 0 { new_matches += 1 }
|
||||
|
||||
if self.limitation.is_reached() {
|
||||
match matches.iter().position(|match_| match_.distance > 0) {
|
||||
Some(pos) if pos == 0 => continue,
|
||||
Some(pos) => matches.truncate(pos),
|
||||
None => (),
|
||||
}
|
||||
}
|
||||
|
||||
let document = Document::from_sorted_matches(id, matches);
|
||||
self.documents.push(document);
|
||||
}
|
||||
self.documents.sort_unstable();
|
||||
|
||||
self.limitation = match self.limitation {
|
||||
Limitation::Specified { limit, matching_documents } if matching_documents + new_matches >= limit => {
|
||||
// this is the biggest valid match
|
||||
// used to find the next smallest invalid match
|
||||
let biggest_valid = Match { query_index: 0, distance: 0, ..Match::max() };
|
||||
|
||||
// documents which does not have a match with a distance of 0 can be removed.
|
||||
// note that documents have a query size of 1.
|
||||
match self.documents.binary_search_by(|d| d.matches[0].cmp(&biggest_valid)) {
|
||||
Ok(index) => self.documents.truncate(index + 1), // this will never happen :)
|
||||
Err(index) => self.documents.truncate(index),
|
||||
}
|
||||
|
||||
Limitation::Reached { remaining: limit }
|
||||
},
|
||||
Limitation::Specified { limit, matching_documents } => {
|
||||
Limitation::Specified {
|
||||
limit: limit,
|
||||
matching_documents: matching_documents + new_matches
|
||||
}
|
||||
},
|
||||
limitation => limitation,
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
impl IntoIterator for Pool {
|
||||
type Item = Document;
|
||||
type IntoIter = vec::IntoIter<Self::Item>;
|
||||
|
||||
fn into_iter(mut self) -> Self::IntoIter {
|
||||
match self.limitation {
|
||||
Limitation::Unspecified { .. } => self.documents.into_iter(),
|
||||
Limitation::Specified { limit, .. } => {
|
||||
self.documents.truncate(limit);
|
||||
self.documents.into_iter()
|
||||
},
|
||||
Limitation::Reached { remaining } => {
|
||||
self.documents.truncate(remaining);
|
||||
self.documents.into_iter()
|
||||
},
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub enum RankedStream<'m, 'v> {
|
||||
Fed {
|
||||
inner: UnionWithState<'m, 'v, DocIndex, u32>,
|
||||
automatons: Vec<DFA>,
|
||||
pool: Pool,
|
||||
},
|
||||
Pours {
|
||||
inner: vec::IntoIter<Document>,
|
||||
},
|
||||
}
|
||||
|
||||
impl<'m, 'v> RankedStream<'m, 'v> {
|
||||
pub fn new(map: &'m DocIndexMap, values: &'v Values<DocIndex>, automatons: Vec<DFA>) -> Self {
|
||||
let mut op = OpWithStateBuilder::new(values);
|
||||
|
||||
for automaton in automatons.iter().cloned() {
|
||||
let stream = map.as_map().search(automaton).with_state();
|
||||
op.push(stream);
|
||||
}
|
||||
|
||||
let pool = match automatons.len() {
|
||||
1 => Pool::with_output_limit(automatons.len(), 20),
|
||||
_ => Pool::new(automatons.len()),
|
||||
};
|
||||
|
||||
RankedStream::Fed {
|
||||
inner: op.union(),
|
||||
automatons: automatons,
|
||||
pool: pool,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'m, 'v, 'a> fst::Streamer<'a> for RankedStream<'m, 'v> {
|
||||
type Item = DocumentId;
|
||||
|
||||
fn next(&'a mut self) -> Option<Self::Item> {
|
||||
loop {
|
||||
// TODO remove that when NLL are here !
|
||||
let mut transfert_pool = None;
|
||||
|
||||
match self {
|
||||
RankedStream::Fed { inner, automatons, pool } => {
|
||||
match inner.next() {
|
||||
Some((_string, indexed_values)) => {
|
||||
for iv in indexed_values {
|
||||
|
||||
let distance = automatons[iv.index].distance(iv.state).to_u8();
|
||||
|
||||
// TODO remove the Pool system !
|
||||
// this is an internal Pool rule but
|
||||
// it is more efficient to test that here
|
||||
if pool.limitation.reached().is_some() && distance != 0 { continue }
|
||||
|
||||
let mut matches = HashMap::with_capacity(iv.values.len() / 2);
|
||||
for di in iv.values {
|
||||
let match_ = Match {
|
||||
query_index: iv.index as u32,
|
||||
distance: distance,
|
||||
attribute: di.attribute,
|
||||
attribute_index: di.attribute_index,
|
||||
};
|
||||
matches.entry(di.document)
|
||||
.and_modify(|matches: &mut Vec<_>| matches.push(match_))
|
||||
.or_insert_with(|| vec![match_]);
|
||||
}
|
||||
pool.extend(matches);
|
||||
}
|
||||
},
|
||||
None => {
|
||||
transfert_pool = Some(mem::replace(pool, Pool::new(0)));
|
||||
},
|
||||
}
|
||||
},
|
||||
RankedStream::Pours { inner } => {
|
||||
return inner.next().map(|d| d.document_id)
|
||||
},
|
||||
}
|
||||
|
||||
// transform the `RankedStream` into a `Pours`
|
||||
if let Some(pool) = transfert_pool {
|
||||
*self = RankedStream::Pours {
|
||||
inner: pool.into_iter(),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user