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.
89 lines
2.6 KiB
Go
89 lines
2.6 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 PhraseQuery struct {
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Terms []string `json:"terms"`
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Field string `json:"field,omitempty"`
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Boost *Boost `json:"boost,omitempty"`
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termQueries []Query
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}
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// NewPhraseQuery creates a new Query for finding
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// exact term phrases in the index.
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// The provided 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 NewPhraseQuery(terms []string, field string) *PhraseQuery {
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termQueries := make([]Query, 0)
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for _, term := range terms {
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if term != "" {
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tq := NewTermQuery(term)
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tq.SetField(field)
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termQueries = append(termQueries, tq)
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}
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}
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return &PhraseQuery{
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Terms: terms,
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Field: field,
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termQueries: termQueries,
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}
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}
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func (q *PhraseQuery) 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 *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
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conjunctionQuery := NewConjunctionQuery(q.termQueries)
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conjunctionSearcher, err := conjunctionQuery.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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return searchers.NewPhraseSearcher(i, conjunctionSearcher.(*searchers.ConjunctionSearcher), q.Terms)
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}
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func (q *PhraseQuery) Validate() error {
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if len(q.termQueries) < 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 *PhraseQuery) UnmarshalJSON(data []byte) error {
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type _phraseQuery PhraseQuery
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tmp := _phraseQuery{}
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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.Terms = tmp.Terms
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q.Field = tmp.Field
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q.Boost = tmp.Boost
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q.termQueries = make([]Query, len(q.Terms))
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for i, term := range q.Terms {
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q.termQueries[i] = &TermQuery{Term: term, Field: q.Field, Boost: q.Boost}
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}
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return nil
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}
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