90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
// 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/analysis"
|
|
)
|
|
|
|
func RegisterTokenizer(name string, constructor TokenizerConstructor) {
|
|
_, exists := tokenizers[name]
|
|
if exists {
|
|
panic(fmt.Errorf("attempted to register duplicate tokenizer named '%s'", name))
|
|
}
|
|
tokenizers[name] = constructor
|
|
}
|
|
|
|
type TokenizerConstructor func(config map[string]interface{}, cache *Cache) (analysis.Tokenizer, error)
|
|
type TokenizerRegistry map[string]TokenizerConstructor
|
|
|
|
type TokenizerCache struct {
|
|
*ConcurrentCache
|
|
}
|
|
|
|
func NewTokenizerCache() *TokenizerCache {
|
|
return &TokenizerCache{
|
|
NewConcurrentCache(),
|
|
}
|
|
}
|
|
|
|
func TokenizerBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) {
|
|
cons, registered := tokenizers[name]
|
|
if !registered {
|
|
return nil, fmt.Errorf("no tokenizer with name or type '%s' registered", name)
|
|
}
|
|
tokenizer, err := cons(config, cache)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error building tokenizer: %v", err)
|
|
}
|
|
return tokenizer, nil
|
|
}
|
|
|
|
func (c *TokenizerCache) TokenizerNamed(name string, cache *Cache) (analysis.Tokenizer, error) {
|
|
item, err := c.ItemNamed(name, cache, TokenizerBuild)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return item.(analysis.Tokenizer), nil
|
|
}
|
|
|
|
func (c *TokenizerCache) DefineTokenizer(name string, typ string, config map[string]interface{}, cache *Cache) (analysis.Tokenizer, error) {
|
|
item, err := c.DefineItem(name, typ, config, cache, TokenizerBuild)
|
|
if err != nil {
|
|
if err == ErrAlreadyDefined {
|
|
return nil, fmt.Errorf("tokenizer named '%s' already defined", name)
|
|
}
|
|
return nil, err
|
|
}
|
|
return item.(analysis.Tokenizer), nil
|
|
}
|
|
|
|
func TokenizerTypesAndInstances() ([]string, []string) {
|
|
emptyConfig := map[string]interface{}{}
|
|
emptyCache := NewCache()
|
|
var types []string
|
|
var instances []string
|
|
for name, cons := range tokenizers {
|
|
_, err := cons(emptyConfig, emptyCache)
|
|
if err == nil {
|
|
instances = append(instances, name)
|
|
} else {
|
|
types = append(types, name)
|
|
}
|
|
}
|
|
return types, instances
|
|
}
|