forked from jason-wolfe/search-index-benchmark-game
/
do_query.rs
186 lines (171 loc) · 5.92 KB
/
do_query.rs
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use std::{env, mem};
use std::io::BufRead;
use std::path::Path;
use std::sync::Arc;
use rucene::core::search::collector::{SearchCollector, TopDocsCollector, Collector, ParallelLeafCollector, ChainedCollector};
use rucene::core::search::{DefaultIndexSearcher, IndexSearcher};
use rucene::core::store::directory::FSDirectory;
use rucene::core::index::reader::{StandardDirectoryReader, LeafReaderContext};
use rucene::core::codec::{CodecEnum, Codec};
use rucene::core::index::merge::{SerialMergeScheduler, TieredMergePolicy};
use rucene::core::search::query::{TermQuery, BooleanQuery, Query};
use rucene::core::doc::Term;
use rucene::core::search::scorer::Scorer;
use rucene::core::util::DocId;
#[derive(Default)]
struct Count {
count: usize
}
impl ParallelLeafCollector for Count {
fn finish_leaf(&mut self) -> rucene::error::Result<()> {
Ok(())
}
}
impl SearchCollector for Count {
type LC = Count;
fn set_next_reader<C: Codec>(&mut self, _reader: &LeafReaderContext<'_, C>) -> rucene::error::Result<()> {
Ok(())
}
fn support_parallel(&self) -> bool {
false
}
fn leaf_collector<C: Codec>(&self, _reader: &LeafReaderContext<'_, C>) -> rucene::error::Result<Self::LC> {
Ok(Count::default())
}
fn finish_parallel(&mut self) -> rucene::error::Result<()> {
unimplemented!()
}
}
impl Collector for Count {
fn needs_scores(&self) -> bool {
false
}
fn collect<S: Scorer + ?Sized>(&mut self, _doc: DocId, _scorer: &mut S) -> rucene::error::Result<()> {
self.count += 1;
Ok(())
}
}
fn main() {
let args: Vec<String> = env::args().collect();
main_inner(&Path::new(&args[1])).unwrap()
}
enum QueryType {
Phrase,
And,
Or
}
fn parse_query(query_str: &str) -> Option<Box<dyn Query<CodecEnum>>> {
let query_type;
let terms: Vec<String>;
if query_str.starts_with("\"") || query_str.starts_with("+\"") {
query_type = QueryType::Phrase;
let l = query_str.len() -1;
terms = query_str[1..l-1].split_whitespace()
.map(|term| term.to_string())
.collect();
} else if query_str.starts_with("+") {
query_type = QueryType::And;
terms = query_str.split_whitespace()
.map(|term| term[1..].to_string())
.collect();
} else {
query_type = QueryType::Or;
terms = query_str.split_whitespace()
.map(|term| term.to_string())
.collect();
}
let terms: Vec<Term> = terms.into_iter()
.map(|term| Term::new("text".into(), term.as_bytes().to_vec()))
.collect();
if terms.len() == 1 {
return Some(Box::new(TermQuery::new(
terms[0].clone(),
1.0,
None,
)));
}
match query_type {
QueryType::And => {
return BooleanQuery::build(
terms.iter()
.map(|term| {
let term_query: Box<dyn Query<CodecEnum>> = Box::new(TermQuery::new(term.clone(), 1.0, None));
term_query
})
.collect(),
vec![],
vec![],
vec![],
0i32
).ok();
}
QueryType::Or => {
return BooleanQuery::build(
vec![],
terms.iter()
.map(|term| {
let term_query: Box<dyn Query<CodecEnum>> = Box::new(TermQuery::new(term.clone(), 1.0, None));
term_query
})
.collect(),
vec![],
vec![],
0i32,
).ok();
}
QueryType::Phrase => {
// Disabling because it is not working.
// let positions = (0i32..terms.len() as i32).collect();
// return Ok(Box::new(PhraseQuery::new(terms, positions, 0, None, None)?))
return None;
}
}
}
fn main_inner(index_dir: &Path) -> rucene::error::Result<()> {
// create index writer
let directory = Arc::new(FSDirectory::with_path(&index_dir)?);
let reader: StandardDirectoryReader<FSDirectory, CodecEnum, SerialMergeScheduler, TieredMergePolicy> = StandardDirectoryReader::open(directory)?;
let searcher = DefaultIndexSearcher::new(Arc::new(reader), None);
let stdin = std::io::stdin();
for line_res in stdin.lock().lines() {
let line = line_res?;
let fields: Vec<&str> = line.split("\t").collect();
assert_eq!(fields.len(), 2, "Expected a line in the format <COMMAND> query.");
let command = fields[0];
let query_str = fields[1].to_ascii_lowercase();
let query_opt: Option<Box<dyn Query<_>>> = parse_query(&query_str);
if query_opt.is_none() {
println!("UNSUPPORTED");
continue;
}
let query = query_opt.unwrap();
let count;
match command {
"COUNT" => {
let mut count_collector = Count::default();
searcher.search(query.as_ref(), &mut count_collector)?;
count = count_collector.count;
}
"TOP_10" => {
let mut top_collector = TopDocsCollector::new(10);
searcher.search(query.as_ref(), &mut top_collector)?;
let _ = top_collector.top_docs();
count = 1;
}
"TOP_10_COUNT" => {
let mut count_collector = Count::default();
let top_collector = TopDocsCollector::new(10);
let mut chain = ChainedCollector::new(&mut count_collector, top_collector);
searcher.search(query.as_ref(), &mut chain)?;
mem::drop(chain);
count = count_collector.count;
}
_ => {
println!("UNSUPPORTED");
continue;
}
}
println!("{}", count);
}
Ok(())
}