86 lines
2.5 KiB
Go
86 lines
2.5 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 search
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/json"
|
||
|
|
|
||
|
|
"github.com/couchbaselabs/bleve/analysis"
|
||
|
|
"github.com/couchbaselabs/bleve/document"
|
||
|
|
"github.com/couchbaselabs/bleve/index"
|
||
|
|
)
|
||
|
|
|
||
|
|
type MatchPhraseQuery struct {
|
||
|
|
MatchPhrase string `json:"match_phrase"`
|
||
|
|
Field string `json:"field,omitempty"`
|
||
|
|
BoostVal float64 `json:"boost,omitempty"`
|
||
|
|
Explain bool `json:"explain,omitempty"`
|
||
|
|
Analyzer *analysis.Analyzer
|
||
|
|
mapping document.Mapping
|
||
|
|
}
|
||
|
|
|
||
|
|
func (q *MatchPhraseQuery) Boost() float64 {
|
||
|
|
return q.BoostVal
|
||
|
|
}
|
||
|
|
|
||
|
|
func (q *MatchPhraseQuery) Searcher(index index.Index) (Searcher, error) {
|
||
|
|
tokens := q.Analyzer.Analyze([]byte(q.MatchPhrase))
|
||
|
|
if len(tokens) > 0 {
|
||
|
|
maxPos := 0
|
||
|
|
// find the highest position index
|
||
|
|
for _, token := range tokens {
|
||
|
|
if int(token.Position) > maxPos {
|
||
|
|
maxPos = int(token.Position)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// use tokens to build phrase
|
||
|
|
phraseTerms := make([]*TermQuery, maxPos)
|
||
|
|
for _, token := range tokens {
|
||
|
|
phraseTerms[int(token.Position)-1] = &TermQuery{
|
||
|
|
Term: string(token.Term),
|
||
|
|
Field: q.Field,
|
||
|
|
BoostVal: q.BoostVal,
|
||
|
|
Explain: q.Explain,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
phraseQuery := &PhraseQuery{
|
||
|
|
Terms: phraseTerms,
|
||
|
|
BoostVal: q.BoostVal,
|
||
|
|
Explain: q.Explain,
|
||
|
|
}
|
||
|
|
return NewPhraseSearcher(index, phraseQuery)
|
||
|
|
} else {
|
||
|
|
noneQuery := &MatchNoneQuery{BoostVal: q.BoostVal, Explain: q.Explain}
|
||
|
|
return NewMatchNoneSearcher(index, noneQuery)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (q *MatchPhraseQuery) Validate() error {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (q *MatchPhraseQuery) UnmarshalJSON(data []byte) error {
|
||
|
|
tmp := struct {
|
||
|
|
MatchPhrase string `json:"match_phrase"`
|
||
|
|
Field string `json:"field,omitempty"`
|
||
|
|
BoostVal float64 `json:"boost,omitempty"`
|
||
|
|
Explain bool `json:"explain,omitempty"`
|
||
|
|
}{}
|
||
|
|
err := json.Unmarshal(data, &tmp)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
q.MatchPhrase = tmp.MatchPhrase
|
||
|
|
q.Field = tmp.Field
|
||
|
|
q.BoostVal = tmp.BoostVal
|
||
|
|
q.Explain = tmp.Explain
|
||
|
|
q.Analyzer = q.mapping[q.Field].Analyzer
|
||
|
|
return nil
|
||
|
|
}
|