snapshot of https://github.com/blevesearch/bleve.git (master, 2026-09-15; blobs > 131072B omitted)

analysis/char/regexp/regexp.go

@@ -0,0 +1,65 @@
+//  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 regexp
+
+import (
+	"fmt"
+	"regexp"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+const Name = "regexp"
+
+type CharFilter struct {
+	r           *regexp.Regexp
+	replacement []byte
+}
+
+func New(r *regexp.Regexp, replacement []byte) *CharFilter {
+	return &CharFilter{
+		r:           r,
+		replacement: replacement,
+	}
+}
+
+func (s *CharFilter) Filter(input []byte) []byte {
+	return s.r.ReplaceAll(input, s.replacement)
+}
+
+func CharFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.CharFilter, error) {
+	regexpStr, ok := config["regexp"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify regexp")
+	}
+	r, err := regexp.Compile(regexpStr)
+	if err != nil {
+		return nil, fmt.Errorf("unable to build regexp char filter: %v", err)
+	}
+	replaceBytes := []byte(" ")
+	replaceStr, ok := config["replace"].(string)
+	if ok {
+		replaceBytes = []byte(replaceStr)
+	}
+	return New(r, replaceBytes), nil
+}
+
+func init() {
+	err := registry.RegisterCharFilter(Name, CharFilterConstructor)
+	if err != nil {
+		panic(err)
+	}
+}