Remove camel case tokenization from repo indexer (#7733)
* Make repository indexer tokenize by camel case selectable * Revert "Make repository indexer tokenize by camel case selectable" This reverts commit a8d4e40af56ffeab9c040a13e01b9e0d5487bd3b. * Remove app.ini setting, permanently remove camel case tokenizer * Increase repoIndexerLatestVersion to force indexes to be rebuilt * Changes introduced by the commmand make vendortokarchuk/v1.17
guillep2k
5 years ago
committed by
Lauris BH
parent
026696b87a
commit
2594693a46
@ -1,78 +0,0 @@ |
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// Copyright (c) 2016 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 camelcase |
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import ( |
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"bytes" |
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"unicode/utf8" |
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"github.com/blevesearch/bleve/analysis" |
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"github.com/blevesearch/bleve/registry" |
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) |
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const Name = "camelCase" |
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// CamelCaseFilter splits a given token into a set of tokens where each resulting token
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// falls into one the following classes:
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// 1) Upper case followed by lower case letters.
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// Terminated by a number, an upper case letter, and a non alpha-numeric symbol.
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// 2) Upper case followed by upper case letters.
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// Terminated by a number, an upper case followed by a lower case letter, and a non alpha-numeric symbol.
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// 3) Lower case followed by lower case letters.
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// Terminated by a number, an upper case letter, and a non alpha-numeric symbol.
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// 4) Number followed by numbers.
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// Terminated by a letter, and a non alpha-numeric symbol.
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// 5) Non alpha-numeric symbol followed by non alpha-numeric symbols.
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// Terminated by a number, and a letter.
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//
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// It does a one-time sequential pass over an input token, from left to right.
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// The scan is greedy and generates the longest substring that fits into one of the classes.
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//
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// See the test file for examples of classes and their parsings.
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type CamelCaseFilter struct{} |
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func NewCamelCaseFilter() *CamelCaseFilter { |
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return &CamelCaseFilter{} |
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} |
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func (f *CamelCaseFilter) Filter(input analysis.TokenStream) analysis.TokenStream { |
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rv := make(analysis.TokenStream, 0, len(input)) |
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nextPosition := 1 |
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for _, token := range input { |
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runeCount := utf8.RuneCount(token.Term) |
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runes := bytes.Runes(token.Term) |
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p := NewParser(runeCount, nextPosition, token.Start) |
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for i := 0; i < runeCount; i++ { |
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if i+1 >= runeCount { |
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p.Push(runes[i], nil) |
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} else { |
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p.Push(runes[i], &runes[i+1]) |
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} |
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} |
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rv = append(rv, p.FlushTokens()...) |
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nextPosition = p.NextPosition() |
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} |
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return rv |
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} |
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func CamelCaseFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) { |
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return NewCamelCaseFilter(), nil |
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} |
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func init() { |
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registry.RegisterTokenFilter(Name, CamelCaseFilterConstructor) |
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} |
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@ -1,109 +0,0 @@ |
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// Copyright (c) 2016 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 camelcase |
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import ( |
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"github.com/blevesearch/bleve/analysis" |
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) |
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func (p *Parser) buildTokenFromTerm(buffer []rune) *analysis.Token { |
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term := analysis.BuildTermFromRunes(buffer) |
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token := &analysis.Token{ |
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Term: term, |
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Position: p.position, |
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Start: p.index, |
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End: p.index + len(term), |
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} |
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p.position++ |
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p.index += len(term) |
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return token |
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} |
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// Parser accepts a symbol and passes it to the current state (representing a class).
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// The state can accept it (and accumulate it). Otherwise, the parser creates a new state that
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// starts with the pushed symbol.
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//
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// Parser accumulates a new resulting token every time it switches state.
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// Use FlushTokens() to get the results after the last symbol was pushed.
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type Parser struct { |
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bufferLen int |
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buffer []rune |
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current State |
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tokens []*analysis.Token |
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position int |
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index int |
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} |
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func NewParser(length, position, index int) *Parser { |
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return &Parser{ |
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bufferLen: length, |
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buffer: make([]rune, 0, length), |
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tokens: make([]*analysis.Token, 0, length), |
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position: position, |
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index: index, |
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} |
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} |
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func (p *Parser) Push(sym rune, peek *rune) { |
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if p.current == nil { |
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// the start of parsing
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p.current = p.NewState(sym) |
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p.buffer = append(p.buffer, sym) |
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} else if p.current.Member(sym, peek) { |
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// same state, just accumulate
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p.buffer = append(p.buffer, sym) |
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} else { |
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// the old state is no more, thus convert the buffer
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p.tokens = append(p.tokens, p.buildTokenFromTerm(p.buffer)) |
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// let the new state begin
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p.current = p.NewState(sym) |
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p.buffer = make([]rune, 0, p.bufferLen) |
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p.buffer = append(p.buffer, sym) |
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} |
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} |
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// Note. States have to have different starting symbols.
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func (p *Parser) NewState(sym rune) State { |
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var found State |
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found = &LowerCaseState{} |
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if found.StartSym(sym) { |
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return found |
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} |
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found = &UpperCaseState{} |
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if found.StartSym(sym) { |
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return found |
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} |
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found = &NumberCaseState{} |
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if found.StartSym(sym) { |
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return found |
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} |
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return &NonAlphaNumericCaseState{} |
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} |
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func (p *Parser) FlushTokens() []*analysis.Token { |
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p.tokens = append(p.tokens, p.buildTokenFromTerm(p.buffer)) |
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return p.tokens |
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} |
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func (p *Parser) NextPosition() int { |
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return p.position |
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} |
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@ -1,87 +0,0 @@ |
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// Copyright (c) 2016 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 camelcase |
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import ( |
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"unicode" |
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) |
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// States codify the classes that the parser recognizes.
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type State interface { |
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// is _sym_ the start character
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StartSym(sym rune) bool |
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// is _sym_ a member of a class.
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// peek, the next sym on the tape, can also be used to determine a class.
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Member(sym rune, peek *rune) bool |
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} |
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type LowerCaseState struct{} |
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func (s *LowerCaseState) Member(sym rune, peek *rune) bool { |
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return unicode.IsLower(sym) |
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} |
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func (s *LowerCaseState) StartSym(sym rune) bool { |
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return s.Member(sym, nil) |
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} |
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type UpperCaseState struct { |
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startedCollecting bool // denotes that the start character has been read
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collectingUpper bool // denotes if this is a class of all upper case letters
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} |
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func (s *UpperCaseState) Member(sym rune, peek *rune) bool { |
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if !(unicode.IsLower(sym) || unicode.IsUpper(sym)) { |
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return false |
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} |
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if peek != nil && unicode.IsUpper(sym) && unicode.IsLower(*peek) { |
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return false |
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} |
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if !s.startedCollecting { |
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// now we have to determine if upper-case letters are collected.
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s.startedCollecting = true |
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s.collectingUpper = unicode.IsUpper(sym) |
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return true |
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} |
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return s.collectingUpper == unicode.IsUpper(sym) |
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} |
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func (s *UpperCaseState) StartSym(sym rune) bool { |
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return unicode.IsUpper(sym) |
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} |
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type NumberCaseState struct{} |
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func (s *NumberCaseState) Member(sym rune, peek *rune) bool { |
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return unicode.IsNumber(sym) |
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} |
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func (s *NumberCaseState) StartSym(sym rune) bool { |
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return s.Member(sym, nil) |
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} |
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type NonAlphaNumericCaseState struct{} |
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func (s *NonAlphaNumericCaseState) Member(sym rune, peek *rune) bool { |
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return !unicode.IsLower(sym) && !unicode.IsUpper(sym) && !unicode.IsNumber(sym) |
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} |
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func (s *NonAlphaNumericCaseState) StartSym(sym rune) bool { |
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return s.Member(sym, nil) |
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} |
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