62 lines
2.2 KiB
Go
62 lines
2.2 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 RegisterTokenFilter(name string, constructor TokenFilterConstructor) {
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_, exists := tokenFilters[name]
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if exists {
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panic(fmt.Errorf("attempted to register duplicate token filter named '%s'", name))
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}
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tokenFilters[name] = constructor
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}
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type TokenFilterConstructor func(config map[string]interface{}, cache *Cache) (analysis.TokenFilter, error)
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type TokenFilterRegistry map[string]TokenFilterConstructor
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type TokenFilterCache map[string]analysis.TokenFilter
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func (c TokenFilterCache) TokenFilterNamed(name string, cache *Cache) (analysis.TokenFilter, error) {
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tokenFilter, cached := c[name]
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if cached {
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return tokenFilter, nil
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}
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tokenFilterConstructor, registered := tokenFilters[name]
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if !registered {
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return nil, fmt.Errorf("no token filter with name or type '%s' registered", name)
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}
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tokenFilter, err := tokenFilterConstructor(nil, cache)
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if err != nil {
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return nil, fmt.Errorf("error building token filter: %v", err)
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}
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c[name] = tokenFilter
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return tokenFilter, nil
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}
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func (c TokenFilterCache) DefineTokenFilter(name string, typ string, config map[string]interface{}, cache *Cache) (analysis.TokenFilter, error) {
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_, cached := c[name]
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if cached {
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return nil, fmt.Errorf("token filter named '%s' already defined", name)
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}
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tokenFilterConstructor, registered := tokenFilters[typ]
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if !registered {
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return nil, fmt.Errorf("no token filter type '%s' registered", typ)
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}
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tokenFilter, err := tokenFilterConstructor(config, cache)
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if err != nil {
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return nil, fmt.Errorf("error building token filter: %v", err)
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}
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c[name] = tokenFilter
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return tokenFilter, nil
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}
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