130 lines
3.4 KiB
Go
130 lines
3.4 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package query
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import (
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"context"
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"fmt"
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"github.com/blevesearch/bleve/v2/mapping"
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"github.com/blevesearch/bleve/v2/search"
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"github.com/blevesearch/bleve/v2/search/searcher"
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"github.com/blevesearch/bleve/v2/util"
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index "github.com/blevesearch/bleve_index_api"
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)
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type MultiPhraseQuery struct {
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Terms [][]string `json:"terms"`
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FieldVal string `json:"field,omitempty"`
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BoostVal *Boost `json:"boost,omitempty"`
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Fuzziness int `json:"fuzziness"`
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autoFuzzy bool
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}
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// NewMultiPhraseQuery creates a new Query for finding
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// term phrases in the index.
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// It is like PhraseQuery, but each position in the
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// phrase may be satisfied by a list of terms
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// as opposed to just one.
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// At least one of the terms must exist in the correct
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// order, at the correct index offsets, in the
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// specified field. Queried field must have been indexed with
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// IncludeTermVectors set to true.
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func NewMultiPhraseQuery(terms [][]string, field string) *MultiPhraseQuery {
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return &MultiPhraseQuery{
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Terms: terms,
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FieldVal: field,
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}
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}
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func (q *MultiPhraseQuery) SetFuzziness(f int) {
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q.Fuzziness = f
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}
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func (q *MultiPhraseQuery) SetAutoFuzziness(auto bool) {
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q.autoFuzzy = auto
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}
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func (q *MultiPhraseQuery) SetBoost(b float64) {
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boost := Boost(b)
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q.BoostVal = &boost
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}
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func (q *MultiPhraseQuery) Boost() float64 {
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return q.BoostVal.Value()
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}
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func (q *MultiPhraseQuery) Field() string {
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return q.FieldVal
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}
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func (q *MultiPhraseQuery) SetField(f string) {
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q.FieldVal = f
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}
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func (q *MultiPhraseQuery) Searcher(ctx context.Context, i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
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return searcher.NewMultiPhraseSearcher(ctx, i, q.Terms, q.Fuzziness, q.autoFuzzy, q.FieldVal, q.BoostVal.Value(), options)
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}
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func (q *MultiPhraseQuery) Validate() error {
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if len(q.Terms) < 1 {
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return fmt.Errorf("phrase query must contain at least one term")
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}
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return nil
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}
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func (q *MultiPhraseQuery) UnmarshalJSON(data []byte) error {
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type Alias MultiPhraseQuery
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aux := &struct {
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Fuzziness interface{} `json:"fuzziness"`
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*Alias
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}{
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Alias: (*Alias)(q),
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}
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if err := util.UnmarshalJSON(data, &aux); err != nil {
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return err
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}
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switch v := aux.Fuzziness.(type) {
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case float64:
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q.Fuzziness = int(v)
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case string:
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if v == "auto" {
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q.autoFuzzy = true
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}
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}
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return nil
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}
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func (f *MultiPhraseQuery) MarshalJSON() ([]byte, error) {
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var fuzzyValue interface{}
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if f.autoFuzzy {
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fuzzyValue = "auto"
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} else {
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fuzzyValue = f.Fuzziness
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}
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type multiPhraseQuery struct {
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Terms [][]string `json:"terms"`
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FieldVal string `json:"field,omitempty"`
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BoostVal *Boost `json:"boost,omitempty"`
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Fuzziness interface{} `json:"fuzziness"`
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}
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aux := multiPhraseQuery{
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Terms: f.Terms,
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FieldVal: f.FieldVal,
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BoostVal: f.BoostVal,
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Fuzziness: fuzzyValue,
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}
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return util.MarshalJSON(aux)
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}
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