98 lines
2.4 KiB
Go
98 lines
2.4 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 bleve
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/blevesearch/bleve/search"
|
|
)
|
|
|
|
type matchQuery struct {
|
|
Match string `json:"match"`
|
|
FieldVal string `json:"field,omitempty"`
|
|
Analyzer string `json:"analyzer,omitempty"`
|
|
BoostVal float64 `json:"boost,omitempty"`
|
|
}
|
|
|
|
// NewMatchQuery creates a Query for matching text.
|
|
// An Analyzer is chosed based on the field.
|
|
// Input text is analyzed using this analyzer.
|
|
// Token terms resulting from this analysis are
|
|
// used to perform term searches. Result documents
|
|
// must satisfy at least one of these term searches.
|
|
func NewMatchQuery(match string) *matchQuery {
|
|
return &matchQuery{
|
|
Match: match,
|
|
BoostVal: 1.0,
|
|
}
|
|
}
|
|
|
|
func (q *matchQuery) Boost() float64 {
|
|
return q.BoostVal
|
|
}
|
|
|
|
func (q *matchQuery) SetBoost(b float64) Query {
|
|
q.BoostVal = b
|
|
return q
|
|
}
|
|
|
|
func (q *matchQuery) Field() string {
|
|
return q.FieldVal
|
|
}
|
|
|
|
func (q *matchQuery) SetField(f string) Query {
|
|
q.FieldVal = f
|
|
return q
|
|
}
|
|
|
|
func (q *matchQuery) Searcher(i *indexImpl, explain bool) (search.Searcher, error) {
|
|
|
|
analyzerName := ""
|
|
if q.Analyzer != "" {
|
|
analyzerName = q.Analyzer
|
|
} else {
|
|
analyzerName = i.m.analyzerNameForPath(q.FieldVal)
|
|
}
|
|
analyzer := i.m.analyzerNamed(analyzerName)
|
|
|
|
if analyzer == nil {
|
|
return nil, fmt.Errorf("no analyzer named '%s' registered", q.Analyzer)
|
|
}
|
|
|
|
field := q.FieldVal
|
|
if q.FieldVal == "" {
|
|
field = i.m.DefaultField
|
|
}
|
|
|
|
tokens := analyzer.Analyze([]byte(q.Match))
|
|
if len(tokens) > 0 {
|
|
|
|
tqs := make([]Query, len(tokens))
|
|
for i, token := range tokens {
|
|
tqs[i] = NewTermQuery(string(token.Term)).
|
|
SetField(field).
|
|
SetBoost(q.BoostVal)
|
|
}
|
|
|
|
shouldQuery := NewDisjunctionQueryMin(tqs, 1).
|
|
SetBoost(q.BoostVal)
|
|
|
|
return shouldQuery.Searcher(i, explain)
|
|
} else {
|
|
noneQuery := NewMatchNoneQuery()
|
|
return noneQuery.Searcher(i, explain)
|
|
}
|
|
}
|
|
|
|
func (q *matchQuery) Validate() error {
|
|
return nil
|
|
}
|