122 lines
3.1 KiB
Go
122 lines
3.1 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 (
|
|
"encoding/json"
|
|
"fmt"
|
|
|
|
"github.com/blevesearch/bleve/index"
|
|
"github.com/blevesearch/bleve/mapping"
|
|
"github.com/blevesearch/bleve/search"
|
|
"github.com/blevesearch/bleve/search/searcher"
|
|
)
|
|
|
|
type DisjunctionQuery struct {
|
|
Disjuncts []Query `json:"disjuncts"`
|
|
BoostVal *Boost `json:"boost,omitempty"`
|
|
Min float64 `json:"min"`
|
|
queryStringMode bool
|
|
}
|
|
|
|
// NewDisjunctionQuery creates a new compound Query.
|
|
// Result documents satisfy at least one Query.
|
|
func NewDisjunctionQuery(disjuncts []Query) *DisjunctionQuery {
|
|
return &DisjunctionQuery{
|
|
Disjuncts: disjuncts,
|
|
}
|
|
}
|
|
|
|
func (q *DisjunctionQuery) SetBoost(b float64) {
|
|
boost := Boost(b)
|
|
q.BoostVal = &boost
|
|
}
|
|
|
|
func (q *DisjunctionQuery) Boost() float64 {
|
|
return q.BoostVal.Value()
|
|
}
|
|
|
|
func (q *DisjunctionQuery) AddQuery(aq ...Query) {
|
|
for _, aaq := range aq {
|
|
q.Disjuncts = append(q.Disjuncts, aaq)
|
|
}
|
|
}
|
|
|
|
func (q *DisjunctionQuery) SetMin(m float64) {
|
|
q.Min = m
|
|
}
|
|
|
|
func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
|
|
ss := make([]search.Searcher, 0, len(q.Disjuncts))
|
|
for _, disjunct := range q.Disjuncts {
|
|
sr, err := disjunct.Searcher(i, m, options)
|
|
if err != nil {
|
|
for _, searcher := range ss {
|
|
if searcher != nil {
|
|
_ = searcher.Close()
|
|
}
|
|
}
|
|
return nil, err
|
|
}
|
|
if _, ok := sr.(*searcher.MatchNoneSearcher); ok && q.queryStringMode {
|
|
// in query string mode, skip match none
|
|
continue
|
|
}
|
|
ss = append(ss, sr)
|
|
}
|
|
if len(ss) < 1 {
|
|
return searcher.NewMatchNoneSearcher(i)
|
|
}
|
|
return searcher.NewDisjunctionSearcher(i, ss, q.Min, options)
|
|
}
|
|
|
|
func (q *DisjunctionQuery) Validate() error {
|
|
if int(q.Min) > len(q.Disjuncts) {
|
|
return fmt.Errorf("disjunction query has fewer than the minimum number of clauses to satisfy")
|
|
}
|
|
for _, q := range q.Disjuncts {
|
|
if q, ok := q.(ValidatableQuery); ok {
|
|
err := q.Validate()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (q *DisjunctionQuery) UnmarshalJSON(data []byte) error {
|
|
tmp := struct {
|
|
Disjuncts []json.RawMessage `json:"disjuncts"`
|
|
Boost *Boost `json:"boost,omitempty"`
|
|
Min float64 `json:"min"`
|
|
}{}
|
|
err := json.Unmarshal(data, &tmp)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
q.Disjuncts = make([]Query, len(tmp.Disjuncts))
|
|
for i, term := range tmp.Disjuncts {
|
|
query, err := ParseQuery(term)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
q.Disjuncts[i] = query
|
|
}
|
|
q.BoostVal = tmp.Boost
|
|
q.Min = tmp.Min
|
|
return nil
|
|
}
|