Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

mapping/synonym.go

@@ -0,0 +1,71 @@
+//  Copyright (c) 2024 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 mapping
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+type SynonymSource struct {
+	CollectionName string `json:"collection"`
+	AnalyzerName   string `json:"analyzer"`
+}
+
+func NewSynonymSource(collection, analyzer string) *SynonymSource {
+	return &SynonymSource{
+		CollectionName: collection,
+		AnalyzerName:   analyzer,
+	}
+}
+
+func (s *SynonymSource) Collection() string {
+	return s.CollectionName
+}
+
+func (s *SynonymSource) Analyzer() string {
+	return s.AnalyzerName
+}
+
+func (s *SynonymSource) SetCollection(c string) {
+	s.CollectionName = c
+}
+
+func (s *SynonymSource) SetAnalyzer(a string) {
+	s.AnalyzerName = a
+}
+func SynonymSourceConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.SynonymSource, error) {
+	collection, ok := config["collection"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify collection")
+	}
+	analyzer, ok := config["analyzer"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify analyzer")
+	}
+	if _, err := cache.AnalyzerNamed(analyzer); err != nil {
+		return nil, fmt.Errorf("analyzer named '%s' not found", analyzer)
+	}
+	return NewSynonymSource(collection, analyzer), nil
+}
+
+func init() {
+	err := registry.RegisterSynonymSource(analysis.SynonymSourceType, SynonymSourceConstructor)
+	if err != nil {
+		panic(err)
+	}
+}