forked from blevesearch/bleve
-
Notifications
You must be signed in to change notification settings - Fork 0
/
query_match_phrase.go
92 lines (77 loc) · 2.5 KB
/
query_match_phrase.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
// 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 bleve
import (
"fmt"
"github.com/blevesearch/bleve/index"
"github.com/blevesearch/bleve/search"
)
type matchPhraseQuery struct {
MatchPhrase string `json:"match_phrase"`
FieldVal string `json:"field,omitempty"`
Analyzer string `json:"analyzer,omitempty"`
BoostVal float64 `json:"boost,omitempty"`
}
// NewMatchPhraseQuery creates a new Query object
// for matching phrases in the index.
// An Analyzer is chosed based on the field.
// Input text is analyzed using this analyzer.
// Token terms resulting from this analysis are
// used to build a search phrase. Result documents
// must match this phrase.
func NewMatchPhraseQuery(matchPhrase string) *matchPhraseQuery {
return &matchPhraseQuery{
MatchPhrase: matchPhrase,
BoostVal: 1.0,
}
}
func (q *matchPhraseQuery) Boost() float64 {
return q.BoostVal
}
func (q *matchPhraseQuery) SetBoost(b float64) Query {
q.BoostVal = b
return q
}
func (q *matchPhraseQuery) Field() string {
return q.FieldVal
}
func (q *matchPhraseQuery) SetField(f string) Query {
q.FieldVal = f
return q
}
func (q *matchPhraseQuery) Searcher(i index.IndexReader, m *IndexMapping, explain bool) (search.Searcher, error) {
field := q.FieldVal
if q.FieldVal == "" {
field = m.DefaultField
}
analyzerName := ""
if q.Analyzer != "" {
analyzerName = q.Analyzer
} else {
analyzerName = m.analyzerNameForPath(field)
}
analyzer := m.analyzerNamed(analyzerName)
if analyzer == nil {
return nil, fmt.Errorf("no analyzer named '%s' registered", q.Analyzer)
}
tokens := analyzer.Analyze([]byte(q.MatchPhrase))
if len(tokens) > 0 {
ts := make([]string, len(tokens))
for i, token := range tokens {
ts[i] = string(token.Term)
}
phraseQuery := NewPhraseQuery(ts, field).SetBoost(q.BoostVal)
return phraseQuery.Searcher(i, m, explain)
}
noneQuery := NewMatchNoneQuery()
return noneQuery.Searcher(i, m, explain)
}
func (q *matchPhraseQuery) Validate() error {
return nil
}