79 lines
2.6 KiB
Go
79 lines
2.6 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/search/highlight"
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)
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func RegisterHighlighter(name string, constructor HighlighterConstructor) {
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_, exists := highlighters[name]
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if exists {
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panic(fmt.Errorf("attempted to register duplicate highlighter named '%s'", name))
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}
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highlighters[name] = constructor
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}
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type HighlighterConstructor func(config map[string]interface{}, cache *Cache) (highlight.Highlighter, error)
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type HighlighterRegistry map[string]HighlighterConstructor
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type HighlighterCache map[string]highlight.Highlighter
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func (c HighlighterCache) HighlighterNamed(name string, cache *Cache) (highlight.Highlighter, error) {
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highlighter, cached := c[name]
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if cached {
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return highlighter, nil
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}
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highlighterConstructor, registered := highlighters[name]
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if !registered {
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return nil, fmt.Errorf("no highlighter with name or type '%s' registered", name)
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}
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highlighter, err := highlighterConstructor(nil, cache)
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if err != nil {
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return nil, fmt.Errorf("error building highlighter: %v", err)
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}
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c[name] = highlighter
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return highlighter, nil
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}
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func (c HighlighterCache) DefineHighlighter(name string, typ string, config map[string]interface{}, cache *Cache) (highlight.Highlighter, error) {
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_, cached := c[name]
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if cached {
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return nil, fmt.Errorf("highlighter named '%s' already defined", name)
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}
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highlighterConstructor, registered := highlighters[typ]
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if !registered {
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return nil, fmt.Errorf("no highlighter type '%s' registered", typ)
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}
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highlighter, err := highlighterConstructor(config, cache)
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if err != nil {
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return nil, fmt.Errorf("error building highlighter: %v", err)
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}
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c[name] = highlighter
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return highlighter, nil
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}
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func HighlighterTypesAndInstances() ([]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 highlighters {
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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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