a9532e510a
rather than having each package include it directly inside of bleve, we have decide to host them all in one repo https://github.com/blevesearch/snowballstem this makes the easier for the rest of the community to use outside of bleve contexts
50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// Copyright (c) 2018 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ru
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import (
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"github.com/blevesearch/bleve/analysis"
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"github.com/blevesearch/bleve/registry"
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"github.com/blevesearch/snowballstem"
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"github.com/blevesearch/snowballstem/russian"
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)
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const SnowballStemmerName = "stemmer_ru_snowball"
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type RussianStemmerFilter struct {
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}
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func NewRussianStemmerFilter() *RussianStemmerFilter {
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return &RussianStemmerFilter{}
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}
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func (s *RussianStemmerFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
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for _, token := range input {
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env := snowballstem.NewEnv(string(token.Term))
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russian.Stem(env)
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token.Term = []byte(env.Current())
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}
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return input
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}
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func RussianStemmerFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
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return NewRussianStemmerFilter(), nil
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}
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func init() {
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registry.RegisterTokenFilter(SnowballStemmerName, RussianStemmerFilterConstructor)
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}
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