f225d484b3
many bugs fixed in existing search phrase query updated to support gaps in term sequence new query types all,none,match,phrase match and new query syntax search, like google search: +/-(optional field qualifier:)<term or quoted phrase>
86 lines
2.5 KiB
Go
86 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 search
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import (
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"encoding/json"
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"github.com/couchbaselabs/bleve/analysis"
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"github.com/couchbaselabs/bleve/document"
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"github.com/couchbaselabs/bleve/index"
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)
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type MatchPhraseQuery struct {
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MatchPhrase string `json:"match_phrase"`
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Field string `json:"field,omitempty"`
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BoostVal float64 `json:"boost,omitempty"`
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Explain bool `json:"explain,omitempty"`
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Analyzer *analysis.Analyzer
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mapping document.Mapping
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}
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func (q *MatchPhraseQuery) Boost() float64 {
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return q.BoostVal
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}
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func (q *MatchPhraseQuery) Searcher(index index.Index) (Searcher, error) {
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tokens := q.Analyzer.Analyze([]byte(q.MatchPhrase))
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if len(tokens) > 0 {
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maxPos := 0
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// find the highest position index
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for _, token := range tokens {
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if int(token.Position) > maxPos {
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maxPos = int(token.Position)
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}
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}
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// use tokens to build phrase
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phraseTerms := make([]*TermQuery, maxPos)
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for _, token := range tokens {
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phraseTerms[int(token.Position)-1] = &TermQuery{
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Term: string(token.Term),
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Field: q.Field,
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BoostVal: q.BoostVal,
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Explain: q.Explain,
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}
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}
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phraseQuery := &PhraseQuery{
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Terms: phraseTerms,
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BoostVal: q.BoostVal,
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Explain: q.Explain,
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}
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return NewPhraseSearcher(index, phraseQuery)
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} else {
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noneQuery := &MatchNoneQuery{BoostVal: q.BoostVal, Explain: q.Explain}
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return NewMatchNoneSearcher(index, noneQuery)
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}
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}
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func (q *MatchPhraseQuery) Validate() error {
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return nil
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}
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func (q *MatchPhraseQuery) UnmarshalJSON(data []byte) error {
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tmp := struct {
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MatchPhrase string `json:"match_phrase"`
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Field string `json:"field,omitempty"`
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BoostVal float64 `json:"boost,omitempty"`
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Explain bool `json:"explain,omitempty"`
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}{}
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err := json.Unmarshal(data, &tmp)
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if err != nil {
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return err
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}
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q.MatchPhrase = tmp.MatchPhrase
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q.Field = tmp.Field
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q.BoostVal = tmp.BoostVal
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q.Explain = tmp.Explain
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q.Analyzer = q.mapping[q.Field].Analyzer
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return nil
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}
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