a265218f76
Boostable, Fieldable, Validatable broken out into separate interfaces. This allows them to be discoverable when needed, but ignorable otherwise. The top-level bleve package only every cares about Validatable and even that is optional. Also, this change goes further to make the structure names more reasonable, for cases where you're directly interacting with the structures.
94 lines
2.4 KiB
Go
94 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 query
|
|
|
|
import (
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/blevesearch/bleve/index"
|
|
"github.com/blevesearch/bleve/mapping"
|
|
"github.com/blevesearch/bleve/search"
|
|
"github.com/blevesearch/bleve/search/searchers"
|
|
)
|
|
|
|
var wildcardRegexpReplacer = strings.NewReplacer(
|
|
// characters in the wildcard that must
|
|
// be escaped in the regexp
|
|
"+", `\+`,
|
|
"(", `\(`,
|
|
")", `\)`,
|
|
"^", `\^`,
|
|
"$", `\$`,
|
|
".", `\.`,
|
|
"{", `\{`,
|
|
"}", `\}`,
|
|
"[", `\[`,
|
|
"]", `\]`,
|
|
`|`, `\|`,
|
|
`\`, `\\`,
|
|
// wildcard characters
|
|
"*", ".*",
|
|
"?", ".")
|
|
|
|
type WildcardQuery struct {
|
|
Wildcard string `json:"wildcard"`
|
|
Field string `json:"field,omitempty"`
|
|
Boost *Boost `json:"boost,omitempty"`
|
|
compiled *regexp.Regexp
|
|
}
|
|
|
|
// NewWildcardQuery creates a new Query which finds
|
|
// documents containing terms that match the
|
|
// specified wildcard. In the wildcard pattern '*'
|
|
// will match any sequence of 0 or more characters,
|
|
// and '?' will match any single character.
|
|
func NewWildcardQuery(wildcard string) *WildcardQuery {
|
|
return &WildcardQuery{
|
|
Wildcard: wildcard,
|
|
}
|
|
}
|
|
|
|
func (q *WildcardQuery) SetBoost(b float64) {
|
|
boost := Boost(b)
|
|
q.Boost = &boost
|
|
}
|
|
|
|
func (q *WildcardQuery) SetField(f string) {
|
|
q.Field = f
|
|
}
|
|
|
|
func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
|
|
field := q.Field
|
|
if q.Field == "" {
|
|
field = m.DefaultSearchField()
|
|
}
|
|
if q.compiled == nil {
|
|
var err error
|
|
q.compiled, err = q.convertToRegexp()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return searchers.NewRegexpSearcher(i, q.compiled, field, q.Boost.Value(), explain)
|
|
}
|
|
|
|
func (q *WildcardQuery) Validate() error {
|
|
var err error
|
|
q.compiled, err = q.convertToRegexp()
|
|
return err
|
|
}
|
|
|
|
func (q *WildcardQuery) convertToRegexp() (*regexp.Regexp, error) {
|
|
regexpString := "^" + wildcardRegexpReplacer.Replace(q.Wildcard) + "$"
|
|
return regexp.Compile(regexpString)
|
|
}
|