1//  Copyright (c) 2014 Couchbase, Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// 		http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package zerowidthnonjoiner
16
17import (
18	"regexp"
19
20	"github.com/blevesearch/bleve/analysis"
21	regexpCharFilter "github.com/blevesearch/bleve/analysis/char/regexp"
22	"github.com/blevesearch/bleve/registry"
23)
24
25const Name = "zero_width_spaces"
26
27var zeroWidthNonJoinerRegexp = regexp.MustCompile(`\x{200C}`)
28
29func CharFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.CharFilter, error) {
30	replaceBytes := []byte(" ")
31	return regexpCharFilter.New(zeroWidthNonJoinerRegexp, replaceBytes), nil
32}
33
34func init() {
35	registry.RegisterCharFilter(Name, CharFilterConstructor)
36}
37