78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
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// 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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