79 lines
2.5 KiB
Go
79 lines
2.5 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package registry
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import (
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"fmt"
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"github.com/blevesearch/bleve/analysis"
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)
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func RegisterTokenMap(name string, constructor TokenMapConstructor) {
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_, exists := tokenMaps[name]
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if exists {
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panic(fmt.Errorf("attempted to register duplicate token map named '%s'", name))
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}
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tokenMaps[name] = constructor
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}
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type TokenMapConstructor func(config map[string]interface{}, cache *Cache) (analysis.TokenMap, error)
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type TokenMapRegistry map[string]TokenMapConstructor
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type TokenMapCache map[string]analysis.TokenMap
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func (c TokenMapCache) TokenMapNamed(name string, cache *Cache) (analysis.TokenMap, error) {
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tokenMap, cached := c[name]
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if cached {
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return tokenMap, nil
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}
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tokenMapConstructor, registered := tokenMaps[name]
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if !registered {
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return nil, fmt.Errorf("no token map with name or type '%s' registered", name)
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}
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tokenMap, err := tokenMapConstructor(nil, cache)
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if err != nil {
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return nil, fmt.Errorf("error building token map: %v", err)
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}
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c[name] = tokenMap
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return tokenMap, nil
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}
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func (c TokenMapCache) DefineTokenMap(name string, typ string, config map[string]interface{}, cache *Cache) (analysis.TokenMap, error) {
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_, cached := c[name]
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if cached {
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return nil, fmt.Errorf("token map named '%s' already defined", name)
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}
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tokenMapConstructor, registered := tokenMaps[typ]
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if !registered {
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return nil, fmt.Errorf("no token map type '%s' registered", typ)
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}
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tokenMap, err := tokenMapConstructor(config, cache)
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if err != nil {
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return nil, fmt.Errorf("error building token map: %v", err)
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}
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c[name] = tokenMap
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return tokenMap, nil
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}
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func TokenMapTypesAndInstances() ([]string, []string) {
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emptyConfig := map[string]interface{}{}
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emptyCache := NewCache()
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types := make([]string, 0)
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instances := make([]string, 0)
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for name, cons := range tokenMaps {
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_, err := cons(emptyConfig, emptyCache)
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if err == nil {
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instances = append(instances, name)
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} else {
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types = append(types, name)
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}
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}
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return types, instances
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}
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