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58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// Copyright (c) 2014 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 apostrophe
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import (
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"bytes"
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"github.com/blevesearch/bleve/v2/analysis"
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"github.com/blevesearch/bleve/v2/registry"
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)
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const Name = "apostrophe"
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const RightSingleQuotationMark = "’"
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const Apostrophe = "'"
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const Apostrophes = Apostrophe + RightSingleQuotationMark
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type ApostropheFilter struct{}
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func NewApostropheFilter() *ApostropheFilter {
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return &ApostropheFilter{}
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}
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func (s *ApostropheFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
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for _, token := range input {
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firstApostrophe := bytes.IndexAny(token.Term, Apostrophes)
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if firstApostrophe >= 0 {
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// found an apostrophe
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token.Term = token.Term[0:firstApostrophe]
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}
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}
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return input
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}
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func ApostropheFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
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return NewApostropheFilter(), nil
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}
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func init() {
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err := registry.RegisterTokenFilter(Name, ApostropheFilterConstructor)
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if err != nil {
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panic(err)
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}
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}
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