84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package ja
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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/ikawaha/kagome.ipadic/tokenizer"
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)
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const TokenizerName = "kagome"
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type KagomeMorphTokenizer struct {
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tok tokenizer.Tokenizer
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}
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func init() {
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_ = tokenizer.SysDic() // prepare system dictionary
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}
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func NewKagomeMorphTokenizer() *KagomeMorphTokenizer {
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return &KagomeMorphTokenizer{
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tok: tokenizer.New(),
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}
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}
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func NewKagomeMorphTokenizerWithUserDic(userdic tokenizer.UserDic) *KagomeMorphTokenizer {
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k := tokenizer.New()
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k.SetUserDic(userdic)
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return &KagomeMorphTokenizer{
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tok: k,
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}
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}
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func (t *KagomeMorphTokenizer) Tokenize(input []byte) analysis.TokenStream {
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var (
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morphs []tokenizer.Token
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prevstart int
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)
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rv := make(analysis.TokenStream, 0, len(input))
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if len(input) < 1 {
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return rv
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}
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morphs = t.tok.Analyze(string(input), tokenizer.Search)
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for i, m := range morphs {
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if m.Surface == "EOS" || m.Surface == "BOS" {
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continue
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}
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surfacelen := len(m.Surface)
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token := &analysis.Token{
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Term: []byte(m.Surface),
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Position: i,
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Start: prevstart,
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End: prevstart + surfacelen,
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Type: analysis.Ideographic,
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}
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prevstart = prevstart + surfacelen
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rv = append(rv, token)
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}
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return rv
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}
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func KagomeMorphTokenizerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Tokenizer, error) {
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return NewKagomeMorphTokenizer(), nil
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}
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func init() {
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registry.RegisterTokenizer(TokenizerName, KagomeMorphTokenizerConstructor)
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}
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