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This commit is contained in:
François Massot
2023-06-30 12:46:31 +02:00
committed by Paul Masurel
parent 98a3b01992
commit 81330aaf89
2 changed files with 61 additions and 32 deletions
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56
src/tokenizer/tokenizer.rs
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@@ -5,6 +5,7 @@ use tokenizer_api::{BoxTokenStream, TokenFilter, Tokenizer};
use crate::tokenizer::empty_tokenizer::EmptyTokenizer;
/// `TextAnalyzer` tokenizes an input text into tokens and modifies the resulting `TokenStream`.
#[derive(Clone)]
pub struct TextAnalyzer {
tokenizer: Box<dyn BoxableTokenizer>,
}
@@ -19,7 +20,7 @@ impl Tokenizer for Box<dyn BoxableTokenizer> {
impl Clone for Box<dyn BoxableTokenizer> {
fn clone(&self) -> Self {
self.box_clone()
(**self).box_clone()
}
}
@@ -40,14 +41,6 @@ impl<T: Tokenizer> BoxableTokenizer for T {
}
}
impl Clone for TextAnalyzer {
fn clone(&self) -> Self {
TextAnalyzer {
tokenizer: self.tokenizer.box_clone(),
}
}
}
impl Default for TextAnalyzer {
fn default() -> TextAnalyzer {
TextAnalyzer::from(EmptyTokenizer)
@@ -97,7 +90,10 @@ impl<T: Tokenizer> TextAnalyzerBuilder<T> {
}
}
// Boxes the internal tokenizer. This is useful to write generic code.
/// Boxes the internal tokenizer. This is useful to write generic code.
/// When creating a `TextAnalyzer` from a `Tokenizer` and a static set of `TokenFilter`,
/// prefer using `TextAnalyzer::builder(tokenizer).filter(token_filter).build()` as it
/// will be more performant and create less boxes.
pub fn dynamic(self) -> TextAnalyzerBuilder {
let boxed_tokenizer = Box::new(self.tokenizer);
TextAnalyzerBuilder {
@@ -106,7 +102,6 @@ impl<T: Tokenizer> TextAnalyzerBuilder<T> {
}
/// Apply a filter and returns a boxed version of the TextAnalyzerBuilder.
/// (If we prefer we can remove this method)
pub fn filter_dynamic<F: TokenFilter>(self, token_filter: F) -> TextAnalyzerBuilder {
self.filter(token_filter).dynamic()
}
@@ -124,18 +119,18 @@ impl<T: Tokenizer> TextAnalyzerBuilder<T> {
mod tests {
use super::*;
use crate::tokenizer::{AlphaNumOnlyFilter, LowerCaser, RemoveLongFilter, WhitespaceTokenizer};
use crate::tokenizer::{AlphaNumOnlyFilter, LowerCaser, RemoveLongFilter, WhitespaceTokenizer, SimpleTokenizer};
#[test]
fn test_text_analyzer_builder() {
let mut analyzer = TextAnalyzer::builder(WhitespaceTokenizer::default())
.filter(AlphaNumOnlyFilter)
.filter(RemoveLongFilter::limit(6))
let mut analyzer = TextAnalyzer::builder(SimpleTokenizer::default())
.filter(RemoveLongFilter::limit(40))
.filter(LowerCaser)
.build();
.build()
.clone();
let mut stream = analyzer.token_stream("- first bullet point");
assert_eq!(stream.next().unwrap().text, "first");
assert_eq!(stream.next().unwrap().text, "point");
assert_eq!(stream.next().unwrap().text, "bullet");
}
@@ -156,19 +151,20 @@ mod tests {
SerializableTokenFilterEnum::LowerCaser(LowerCaser),
SerializableTokenFilterEnum::RemoveLongFilter(RemoveLongFilter::limit(12)),
];
let mut analyzer_builder: TextAnalyzerBuilder = TextAnalyzer::builder(WhitespaceTokenizer::default())
.dynamic();
for filter in filters {
analyzer_builder =
match filter {
SerializableTokenFilterEnum::LowerCaser(lower_caser) =>
analyzer_builder.filter_dynamic(lower_caser),
SerializableTokenFilterEnum::RemoveLongFilter(remove_long_filter) => {
analyzer_builder.filter_dynamic(remove_long_filter)
},
}
}
let mut analyzer = analyzer_builder.build();
let mut analyzer_builder: TextAnalyzerBuilder = TextAnalyzer::builder(SimpleTokenizer::default())
.filter_dynamic(RemoveLongFilter::limit(40))
.filter_dynamic(LowerCaser);
// for filter in filters {
// analyzer_builder =
// match filter {
// SerializableTokenFilterEnum::LowerCaser(lower_caser) =>
// analyzer_builder.filter_dynamic(lower_caser),
// SerializableTokenFilterEnum::RemoveLongFilter(remove_long_filter) => {
// analyzer_builder.filter_dynamic(remove_long_filter)
// },
// }
// }
let mut analyzer = analyzer_builder.build().clone();
let mut stream = analyzer.token_stream("first bullet point");
assert_eq!(stream.next().unwrap().text, "first");
assert_eq!(stream.next().unwrap().text, "bullet");