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