Adding upstream version 2.5.1.

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

registry/synonym_source.go

@@ -0,0 +1,86 @@
+//  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 registry
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+)
+
+func RegisterSynonymSource(typ string, constructor SynonymSourceConstructor) error {
+	_, exists := synonymSources[typ]
+	if exists {
+		return fmt.Errorf("attempted to register duplicate synonym source with type '%s'", typ)
+	}
+	synonymSources[typ] = constructor
+	return nil
+}
+
+type SynonymSourceCache struct {
+	*ConcurrentCache
+}
+
+func NewSynonymSourceCache() *SynonymSourceCache {
+	return &SynonymSourceCache{
+		NewConcurrentCache(),
+	}
+}
+
+type SynonymSourceConstructor func(config map[string]interface{}, cache *Cache) (analysis.SynonymSource, error)
+type SynonymSourceRegistry map[string]SynonymSourceConstructor
+
+func SynonymSourceBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) {
+	cons, registered := synonymSources[name]
+	if !registered {
+		return nil, fmt.Errorf("no synonym source with name '%s' registered", name)
+	}
+	synonymSource, err := cons(config, cache)
+	if err != nil {
+		return nil, fmt.Errorf("error building synonym source: %v", err)
+	}
+	return synonymSource, nil
+}
+
+func (c *SynonymSourceCache) SynonymSourceNamed(name string, cache *Cache) (analysis.SynonymSource, error) {
+	item, err := c.ItemNamed(name, cache, SynonymSourceBuild)
+	if err != nil {
+		return nil, err
+	}
+	return item.(analysis.SynonymSource), nil
+}
+
+func (c *SynonymSourceCache) DefineSynonymSource(name string, typ string, config map[string]interface{}, cache *Cache) (analysis.SynonymSource, error) {
+	item, err := c.DefineItem(name, typ, config, cache, SynonymSourceBuild)
+	if err != nil {
+		if err == ErrAlreadyDefined {
+			return nil, fmt.Errorf("synonym source named '%s' already defined", name)
+		}
+		return nil, err
+	}
+	return item.(analysis.SynonymSource), nil
+}
+
+func (c *SynonymSourceCache) VisitSynonymSources(visitor analysis.SynonymSourceVisitor) error {
+	c.mutex.RLock()
+	defer c.mutex.RUnlock()
+	for k, v := range c.data {
+		err := visitor(k, v.(analysis.SynonymSource))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}