// 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 registry import ( "fmt" "github.com/blevesearch/bleve/search/highlight" ) func RegisterFragmenter(name string, constructor FragmenterConstructor) { _, exists := fragmenters[name] if exists { panic(fmt.Errorf("attempted to register duplicate fragmenter named '%s'", name)) } fragmenters[name] = constructor } type FragmenterConstructor func(config map[string]interface{}, cache *Cache) (highlight.Fragmenter, error) type FragmenterRegistry map[string]FragmenterConstructor type FragmenterCache struct { *ConcurrentCache } func NewFragmenterCache() *FragmenterCache { return &FragmenterCache{ NewConcurrentCache(), } } func FragmenterBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) { cons, registered := fragmenters[name] if !registered { return nil, fmt.Errorf("no fragmenter with name or type '%s' registered", name) } fragmenter, err := cons(config, cache) if err != nil { return nil, fmt.Errorf("error building fragmenter: %v", err) } return fragmenter, nil } func (c *FragmenterCache) FragmenterNamed(name string, cache *Cache) (highlight.Fragmenter, error) { item, err := c.ItemNamed(name, cache, FragmenterBuild) if err != nil { return nil, err } return item.(highlight.Fragmenter), nil } func (c *FragmenterCache) DefineFragmenter(name string, typ string, config map[string]interface{}, cache *Cache) (highlight.Fragmenter, error) { item, err := c.DefineItem(name, typ, config, cache, FragmenterBuild) if err != nil { if err == ErrAlreadyDefined { return nil, fmt.Errorf("fragmenter named '%s' already defined", name) } return nil, err } return item.(highlight.Fragmenter), nil } func FragmenterTypesAndInstances() ([]string, []string) { emptyConfig := map[string]interface{}{} emptyCache := NewCache() var types []string var instances []string for name, cons := range fragmenters { _, err := cons(emptyConfig, emptyCache) if err == nil { instances = append(instances, name) } else { types = append(types, name) } } return types, instances }