4e38c49287
the logic of how a phrase search works should be an internal detail of the phrase searcher. further, these changes will allow proper scoring of phrase matches, which require access to the underlying searcher objects, which were hidden in the previous approach.
78 lines
2.1 KiB
Go
78 lines
2.1 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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"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/searcher"
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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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BoostVal *Boost `json:"boost,omitempty"`
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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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return &PhraseQuery{
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Terms: terms,
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Field: field,
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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.BoostVal = &boost
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}
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func (q *PhraseQuery) Boost() float64 {
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return q.BoostVal.Value()
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}
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func (q *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
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return searcher.NewPhraseSearcher(i, q.Terms, q.Field, options)
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}
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func (q *PhraseQuery) 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 *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.BoostVal = tmp.BoostVal
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return nil
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}
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