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.
107 lines
2.9 KiB
Go
107 lines
2.9 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 query
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import (
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"encoding/json"
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"fmt"
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"github.com/blevesearch/bleve/index"
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"github.com/blevesearch/bleve/mapping"
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"github.com/blevesearch/bleve/search"
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"github.com/blevesearch/bleve/search/searchers"
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)
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type DisjunctionQuery struct {
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Disjuncts []Query `json:"disjuncts"`
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Boost *Boost `json:"boost,omitempty"`
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Min float64 `json:"min"`
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}
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// NewDisjunctionQuery creates a new compound Query.
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// Result documents satisfy at least one Query.
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func NewDisjunctionQuery(disjuncts []Query) *DisjunctionQuery {
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return &DisjunctionQuery{
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Disjuncts: disjuncts,
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}
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}
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// NewDisjunctionQueryMin creates a new compound Query.
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// Result documents satisfy at least min Queries.
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func NewDisjunctionQueryMin(disjuncts []Query, min float64) *DisjunctionQuery {
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return &DisjunctionQuery{
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Disjuncts: disjuncts,
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Min: min,
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}
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}
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func (q *DisjunctionQuery) SetBoost(b float64) {
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boost := Boost(b)
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q.Boost = &boost
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}
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func (q *DisjunctionQuery) AddQuery(aq Query) {
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q.Disjuncts = append(q.Disjuncts, aq)
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}
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func (q *DisjunctionQuery) SetMin(m float64) {
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q.Min = m
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}
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func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
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ss := make([]search.Searcher, len(q.Disjuncts))
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for in, disjunct := range q.Disjuncts {
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var err error
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ss[in], err = disjunct.Searcher(i, m, explain)
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if err != nil {
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return nil, err
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}
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}
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return searchers.NewDisjunctionSearcher(i, ss, q.Min, explain)
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}
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func (q *DisjunctionQuery) Validate() error {
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if int(q.Min) > len(q.Disjuncts) {
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return fmt.Errorf("disjunction query has fewer than the minimum number of clauses to satisfy")
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}
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for _, q := range q.Disjuncts {
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if q, ok := q.(ValidatableQuery); ok {
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err := q.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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}
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return nil
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}
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func (q *DisjunctionQuery) UnmarshalJSON(data []byte) error {
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tmp := struct {
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Disjuncts []json.RawMessage `json:"disjuncts"`
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Boost *Boost `json:"boost,omitempty"`
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Min float64 `json:"min"`
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}{}
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err := json.Unmarshal(data, &tmp)
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if err != nil {
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return err
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}
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q.Disjuncts = make([]Query, len(tmp.Disjuncts))
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for i, term := range tmp.Disjuncts {
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query, err := ParseQuery(term)
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if err != nil {
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return err
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}
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q.Disjuncts[i] = query
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}
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q.Boost = tmp.Boost
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q.Min = tmp.Min
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return nil
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}
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