/
analyzer_en.go
42 lines (38 loc) · 1.32 KB
/
analyzer_en.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
// Copyright (c) 2020 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package en implements an analyzer with reasonable defaults for processing
// English text.
//
// It strips possessive suffixes ('s), transforms tokens to lower case,
// removes stopwords from a built-in list, and applies porter stemming.
//
// The built-in stopwords list is defined in EnglishStopWords.
package en
import (
"github.com/blugelabs/bluge/analysis"
"github.com/blugelabs/bluge/analysis/token"
"github.com/blugelabs/bluge/analysis/tokenizer"
)
const AnalyzerName = "en"
func NewAnalyzer() *analysis.Analyzer {
return &analysis.Analyzer{
Tokenizer: tokenizer.NewUnicodeTokenizer(),
TokenFilters: []analysis.TokenFilter{
NewPossessiveFilter(),
token.NewLowerCaseFilter(),
StopWordsFilter(),
StemmerFilter(),
},
}
}