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// Copyright (c) 2018 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 ro
import (
"github.com/blevesearch/bleve/analysis"
"github.com/blevesearch/bleve/registry"
"github.com/blevesearch/snowballstem"
"github.com/blevesearch/snowballstem/romanian"
)
const SnowballStemmerName = "stemmer_ro_snowball"
type RomanianStemmerFilter struct {
}
func NewRomanianStemmerFilter() *RomanianStemmerFilter {
return &RomanianStemmerFilter{}
}
func (s *RomanianStemmerFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
for _, token := range input {
env := snowballstem.NewEnv(string(token.Term))
romanian.Stem(env)
token.Term = []byte(env.Current())
}
return input
}
func RomanianStemmerFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
return NewRomanianStemmerFilter(), nil
}
func init() {
registry.RegisterTokenFilter(SnowballStemmerName, RomanianStemmerFilterConstructor)
}
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