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// 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 keyword
import (
"fmt"
"github.com/blevesearch/bleve/analysis"
"github.com/blevesearch/bleve/registry"
)
const Name = "keyword_marker"
type KeyWordMarkerFilter struct {
keyWords analysis.TokenMap
}
func NewKeyWordMarkerFilter(keyWords analysis.TokenMap) *KeyWordMarkerFilter {
return &KeyWordMarkerFilter{
keyWords: keyWords,
}
}
func (f *KeyWordMarkerFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
for _, token := range input {
word := string(token.Term)
_, isKeyWord := f.keyWords[word]
if isKeyWord {
token.KeyWord = true
}
}
return input
}
func KeyWordMarkerFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
keywordsTokenMapName, ok := config["keywords_token_map"].(string)
if !ok {
return nil, fmt.Errorf("must specify keywords_token_map")
}
keywordsTokenMap, err := cache.TokenMapNamed(keywordsTokenMapName)
if err != nil {
return nil, fmt.Errorf("error building keyword marker filter: %v", err)
}
return NewKeyWordMarkerFilter(keywordsTokenMap), nil
}
func init() {
registry.RegisterTokenFilter(Name, KeyWordMarkerFilterConstructor)
}
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