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/
segmenter_worker.go
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/
segmenter_worker.go
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// Copyright 2013 Hui Chen
// Copyright 2016 ego authors
//
// 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 engine
import (
// "fmt"
"strings"
"github.com/go-ego/gpy"
"github.com/go-ego/riot/types"
)
type segmenterRequest struct {
docId uint64
hash uint32
data types.DocIndexData
// data types.DocumentIndexData
forceUpdate bool
}
// Map defines the type map[string][]int
type Map map[string][]int
// Segspl split seg
func (engine *Engine) Segspl(splData []string, num int) (Map, int) {
var (
numTokens int
sqlitStr string
)
tokensMap := make(map[string][]int)
for i := 0; i < num; i++ {
if splData[i] != "" {
if !engine.stopTokens.IsStopToken(splData[i]) {
numTokens++
tokensMap[splData[i]] = append(tokensMap[splData[i]], numTokens)
}
sqlitStr += splData[i]
if !engine.stopTokens.IsStopToken(sqlitStr) {
numTokens++
tokensMap[sqlitStr] = append(tokensMap[sqlitStr], numTokens)
}
if engine.initOptions.Using == 6 {
// more combination
var sqlitsStr string
for s := i + 1; s < len(splData); s++ {
sqlitsStr += splData[s]
if !engine.stopTokens.IsStopToken(sqlitsStr) {
numTokens++
tokensMap[sqlitsStr] = append(tokensMap[sqlitsStr], numTokens)
}
}
}
}
}
return tokensMap, numTokens
}
func (engine *Engine) splitData(request segmenterRequest) (Map, int) {
tokensMap := make(map[string][]int)
var (
num int
numTokens int
)
if request.data.Content != "" {
request.data.Content = strings.ToLower(request.data.Content)
if engine.initOptions.Using == 4 {
// use segmenter
segments := engine.segmenter.Segment([]byte(request.data.Content))
for _, segment := range segments {
token := segment.Token().Text()
if !engine.stopTokens.IsStopToken(token) {
tokensMap[token] = append(tokensMap[token], segment.Start())
}
}
numTokens += len(segments)
}
if engine.initOptions.Using == 5 {
// use segmenter
splSpaData := strings.Split(request.data.Content, " ")
num := len(splSpaData)
tokenMap, numToken := engine.Segspl(splSpaData, num)
numTokens += numToken
for key, val := range tokenMap {
tokensMap[key] = val
}
}
if engine.initOptions.Using != 5 {
splData := strings.Split(request.data.Content, "")
num = len(splData)
tokenMap, numToken := engine.Segspl(splData, num)
numTokens += numToken
for key, val := range tokenMap {
tokensMap[key] = val
}
}
}
for _, t := range request.data.Tokens {
if !engine.stopTokens.IsStopToken(t.Text) {
tokensMap[t.Text] = t.Locations
}
}
numTokens += len(request.data.Tokens)
return tokensMap, numTokens
}
func (engine *Engine) segmenterData(request segmenterRequest) (Map, int) {
tokensMap := make(map[string][]int)
numTokens := 0
if engine.initOptions.Using == 1 && request.data.Content != "" {
// Content分词, 当文档正文不为空时,优先从内容分词中得到关键词
segments := engine.segmenter.Segment([]byte(request.data.Content))
for _, segment := range segments {
token := segment.Token().Text()
if !engine.stopTokens.IsStopToken(token) {
tokensMap[token] = append(tokensMap[token], segment.Start())
}
}
numTokens = len(segments)
return tokensMap, numTokens
}
if engine.initOptions.Using == 2 || ((engine.initOptions.Using == 1 || engine.initOptions.Using == 3) && request.data.Content == "") {
for _, t := range request.data.Tokens {
if !engine.stopTokens.IsStopToken(t.Text) {
tokensMap[t.Text] = t.Locations
}
}
numTokens = len(request.data.Tokens)
return tokensMap, numTokens
}
if engine.initOptions.Using == 3 && request.data.Content != "" {
// Content分词, 当文档正文不为空时,优先从内容分词中得到关键词
segments := engine.segmenter.Segment([]byte(request.data.Content))
for _, segment := range segments {
token := segment.Token().Text()
if !engine.stopTokens.IsStopToken(token) {
tokensMap[token] = append(tokensMap[token], segment.Start())
}
}
for _, t := range request.data.Tokens {
if !engine.stopTokens.IsStopToken(t.Text) {
tokensMap[t.Text] = t.Locations
}
}
numTokens = len(segments) + len(request.data.Tokens)
return tokensMap, numTokens
}
tokenMap, lenSplitData := engine.splitData(request)
return tokenMap, lenSplitData
}
func (engine *Engine) segmenterWorker() {
for {
request := <-engine.segmenterChannel
if request.docId == 0 {
if request.forceUpdate {
for i := 0; i < engine.initOptions.NumShards; i++ {
engine.indexerAddDocChannels[i] <- indexerAddDocumentRequest{forceUpdate: true}
}
}
continue
}
shard := engine.getShard(request.hash)
tokensMap, numTokens := engine.segmenterData(request)
// 加入非分词的文档标签
for _, label := range request.data.Labels {
if !engine.initOptions.NotUsingSegmenter {
if !engine.stopTokens.IsStopToken(label) {
//当正文中已存在关键字时,若不判断,位置信息将会丢失
if _, ok := tokensMap[label]; !ok {
tokensMap[label] = []int{}
}
}
} else {
//当正文中已存在关键字时,若不判断,位置信息将会丢失
if _, ok := tokensMap[label]; !ok {
tokensMap[label] = []int{}
}
}
}
indexerRequest := indexerAddDocumentRequest{
document: &types.DocumentIndex{
DocId: request.docId,
TokenLength: float32(numTokens),
Keywords: make([]types.KeywordIndex, len(tokensMap)),
},
forceUpdate: request.forceUpdate,
}
iTokens := 0
for k, v := range tokensMap {
indexerRequest.document.Keywords[iTokens] = types.KeywordIndex{
Text: k,
// 非分词标注的词频设置为0,不参与tf-idf计算
Frequency: float32(len(v)),
Starts: v}
iTokens++
}
engine.indexerAddDocChannels[shard] <- indexerRequest
if request.forceUpdate {
for i := 0; i < engine.initOptions.NumShards; i++ {
if i == shard {
continue
}
engine.indexerAddDocChannels[i] <- indexerAddDocumentRequest{forceUpdate: true}
}
}
rankerRequest := rankerAddDocRequest{
// docId: request.docId, fields: request.data.Fields}
docId: request.docId, fields: request.data.Fields, content: request.data.Content, attri: request.data.Attri}
engine.rankerAddDocChannels[shard] <- rankerRequest
}
}
// PinYin get the Chinese alphabet and abbreviation
func (engine *Engine) PinYin(hans string) []string {
var (
str string
pystr string
strArr []string
splitStr string
// splitArr []string
)
//
splitHans := strings.Split(hans, "")
for i := 0; i < len(splitHans); i++ {
if splitHans[i] != "" {
if !engine.stopTokens.IsStopToken(splitHans[i]) {
strArr = append(strArr, splitHans[i])
}
splitStr += splitHans[i]
}
if !engine.stopTokens.IsStopToken(splitStr) {
strArr = append(strArr, splitStr)
}
}
// Segment 分词
if !engine.initOptions.NotUsingSegmenter {
sehans := engine.Segment(hans)
for h := 0; h < len(sehans); h++ {
if !engine.stopTokens.IsStopToken(sehans[h]) {
strArr = append(strArr, sehans[h])
}
}
}
//
// py := pinyin.LazyConvert(sehans[h], nil)
py := gpy.LazyConvert(hans, nil)
for i := 0; i < len(py); i++ {
str += py[i][0:1]
pystr += py[i]
if !engine.stopTokens.IsStopToken(pystr) {
strArr = append(strArr, pystr)
}
if !engine.stopTokens.IsStopToken(str) {
strArr = append(strArr, str)
}
}
return strArr
}