105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package bleve
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import (
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"github.com/blevesearch/bleve/search"
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)
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type BooleanQuery struct {
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Must *ConjunctionQuery `json:"must,omitempty"`
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Should *DisjunctionQuery `json:"should,omitempty"`
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MustNot *DisjunctionQuery `json:"must_not,omitempty"`
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BoostVal float64 `json:"boost,omitempty"`
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}
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func NewBooleanQuery(must *ConjunctionQuery, should *DisjunctionQuery, mustNot *DisjunctionQuery) *BooleanQuery {
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return &BooleanQuery{
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Must: must,
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Should: should,
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MustNot: mustNot,
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BoostVal: 1.0,
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}
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}
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func (q *BooleanQuery) Boost() float64 {
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return q.BoostVal
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}
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func (q *BooleanQuery) SetBoost(b float64) *BooleanQuery {
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q.BoostVal = b
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return q
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}
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func (q *BooleanQuery) Searcher(i *indexImpl, explain bool) (search.Searcher, error) {
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var mustSearcher *search.ConjunctionSearcher
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if q.Must != nil {
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ms, err := q.Must.Searcher(i, explain)
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if err != nil {
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return nil, err
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}
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if ms != nil {
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mustSearcher = ms.(*search.ConjunctionSearcher)
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}
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}
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var shouldSearcher *search.DisjunctionSearcher
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if q.Should != nil {
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ss, err := q.Should.Searcher(i, explain)
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if err != nil {
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return nil, err
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}
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if ss != nil {
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shouldSearcher = ss.(*search.DisjunctionSearcher)
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}
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}
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var mustNotSearcher *search.DisjunctionSearcher
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if q.MustNot != nil {
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mns, err := q.MustNot.Searcher(i, explain)
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if err != nil {
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return nil, err
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}
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if mns != nil {
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mustNotSearcher = mns.(*search.DisjunctionSearcher)
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}
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}
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return search.NewBooleanSearcher(i.i, mustSearcher, shouldSearcher, mustNotSearcher, explain)
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}
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func (q *BooleanQuery) Validate() error {
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if q.Must != nil {
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err := q.Must.Validate()
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if err != nil {
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return err
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}
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}
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if q.Should != nil {
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err := q.Should.Validate()
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if err != nil {
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return err
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}
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}
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if q.MustNot != nil {
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err := q.MustNot.Validate()
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if err != nil {
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return err
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}
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}
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if q.Must == nil && q.Should == nil {
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return ERROR_BOOLEAN_QUERY_NEEDS_MUST_OR_SHOULD
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}
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if q.Must != nil && len(q.Must.Conjuncts) == 0 && q.Should != nil && len(q.Should.Disjuncts) == 0 {
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return ERROR_BOOLEAN_QUERY_NEEDS_MUST_OR_SHOULD
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}
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return nil
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}
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