You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
209 lines
5.0 KiB
209 lines
5.0 KiB
// 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 BooleanQuery struct {
|
|
Must Query `json:"must,omitempty"`
|
|
Should Query `json:"should,omitempty"`
|
|
MustNot Query `json:"must_not,omitempty"`
|
|
BoostVal *Boost `json:"boost,omitempty"`
|
|
}
|
|
|
|
// NewBooleanQuery creates a compound Query composed
|
|
// of several other Query objects.
|
|
// Result documents must satisfy ALL of the
|
|
// must Queries.
|
|
// Result documents must satisfy NONE of the must not
|
|
// Queries.
|
|
// Result documents that ALSO satisfy any of the should
|
|
// Queries will score higher.
|
|
func NewBooleanQuery(must []Query, should []Query, mustNot []Query) *BooleanQuery {
|
|
|
|
rv := BooleanQuery{}
|
|
if len(must) > 0 {
|
|
rv.Must = NewConjunctionQuery(must)
|
|
}
|
|
if len(should) > 0 {
|
|
rv.Should = NewDisjunctionQuery(should)
|
|
}
|
|
if len(mustNot) > 0 {
|
|
rv.MustNot = NewDisjunctionQuery(mustNot)
|
|
}
|
|
|
|
return &rv
|
|
}
|
|
|
|
// SetMinShould requires that at least minShould of the
|
|
// should Queries must be satisfied.
|
|
func (q *BooleanQuery) SetMinShould(minShould float64) {
|
|
q.Should.(*DisjunctionQuery).SetMin(minShould)
|
|
}
|
|
|
|
func (q *BooleanQuery) AddMust(m ...Query) {
|
|
if q.Must == nil {
|
|
q.Must = NewConjunctionQuery([]Query{})
|
|
}
|
|
for _, mq := range m {
|
|
q.Must.(*ConjunctionQuery).AddQuery(mq)
|
|
}
|
|
}
|
|
|
|
func (q *BooleanQuery) AddShould(m ...Query) {
|
|
if q.Should == nil {
|
|
q.Should = NewDisjunctionQuery([]Query{})
|
|
}
|
|
for _, mq := range m {
|
|
q.Should.(*DisjunctionQuery).AddQuery(mq)
|
|
}
|
|
}
|
|
|
|
func (q *BooleanQuery) AddMustNot(m ...Query) {
|
|
if q.MustNot == nil {
|
|
q.MustNot = NewDisjunctionQuery([]Query{})
|
|
}
|
|
for _, mq := range m {
|
|
q.MustNot.(*DisjunctionQuery).AddQuery(mq)
|
|
}
|
|
}
|
|
|
|
func (q *BooleanQuery) SetBoost(b float64) {
|
|
boost := Boost(b)
|
|
q.BoostVal = &boost
|
|
}
|
|
|
|
func (q *BooleanQuery) Boost() float64{
|
|
return q.BoostVal.Value()
|
|
}
|
|
|
|
func (q *BooleanQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
|
|
var err error
|
|
var mustNotSearcher search.Searcher
|
|
if q.MustNot != nil {
|
|
mustNotSearcher, err = q.MustNot.Searcher(i, m, explain)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if q.Must == nil && q.Should == nil {
|
|
q.Must = NewMatchAllQuery()
|
|
}
|
|
}
|
|
|
|
var mustSearcher search.Searcher
|
|
if q.Must != nil {
|
|
mustSearcher, err = q.Must.Searcher(i, m, explain)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
var shouldSearcher search.Searcher
|
|
if q.Should != nil {
|
|
shouldSearcher, err = q.Should.Searcher(i, m, explain)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if mustSearcher == nil && shouldSearcher != nil && mustNotSearcher == nil {
|
|
return shouldSearcher, nil
|
|
}
|
|
|
|
return searcher.NewBooleanSearcher(i, mustSearcher, shouldSearcher, mustNotSearcher, explain)
|
|
}
|
|
|
|
func (q *BooleanQuery) Validate() error {
|
|
if qm, ok := q.Must.(ValidatableQuery); ok {
|
|
err := qm.Validate()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if qs, ok := q.Should.(ValidatableQuery); ok {
|
|
err := qs.Validate()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if qmn, ok := q.MustNot.(ValidatableQuery); ok {
|
|
err := qmn.Validate()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if q.Must == nil && q.Should == nil && q.MustNot == nil {
|
|
return fmt.Errorf("boolean query must contain at least one must or should or not must clause")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (q *BooleanQuery) UnmarshalJSON(data []byte) error {
|
|
tmp := struct {
|
|
Must json.RawMessage `json:"must,omitempty"`
|
|
Should json.RawMessage `json:"should,omitempty"`
|
|
MustNot json.RawMessage `json:"must_not,omitempty"`
|
|
Boost *Boost `json:"boost,omitempty"`
|
|
}{}
|
|
err := json.Unmarshal(data, &tmp)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if tmp.Must != nil {
|
|
q.Must, err = ParseQuery(tmp.Must)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, isConjunctionQuery := q.Must.(*ConjunctionQuery)
|
|
if !isConjunctionQuery {
|
|
return fmt.Errorf("must clause must be conjunction")
|
|
}
|
|
}
|
|
|
|
if tmp.Should != nil {
|
|
q.Should, err = ParseQuery(tmp.Should)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, isDisjunctionQuery := q.Should.(*DisjunctionQuery)
|
|
if !isDisjunctionQuery {
|
|
return fmt.Errorf("should clause must be disjunction")
|
|
}
|
|
}
|
|
|
|
if tmp.MustNot != nil {
|
|
q.MustNot, err = ParseQuery(tmp.MustNot)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, isDisjunctionQuery := q.MustNot.(*DisjunctionQuery)
|
|
if !isDisjunctionQuery {
|
|
return fmt.Errorf("must not clause must be disjunction")
|
|
}
|
|
}
|
|
|
|
q.BoostVal = tmp.Boost
|
|
|
|
return nil
|
|
}
|