85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
// Copyright (c) 2015 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 searchers
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import (
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"github.com/blevesearch/bleve/index"
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"github.com/blevesearch/bleve/search"
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"github.com/blevesearch/bleve/search/scorers"
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)
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// DocIDSearcher returns documents matching a predefined set of identifiers.
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type DocIDSearcher struct {
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reader index.DocIDReader
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scorer *scorers.ConstantScorer
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count int
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}
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func NewDocIDSearcher(indexReader index.IndexReader, ids []string, boost float64,
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explain bool) (searcher *DocIDSearcher, err error) {
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reader, err := indexReader.DocIDReaderOnly(ids)
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if err != nil {
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return nil, err
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}
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scorer := scorers.NewConstantScorer(1.0, boost, explain)
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return &DocIDSearcher{
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scorer: scorer,
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reader: reader,
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count: len(ids),
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}, nil
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}
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func (s *DocIDSearcher) Count() uint64 {
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return uint64(s.count)
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}
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func (s *DocIDSearcher) Weight() float64 {
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return s.scorer.Weight()
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}
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func (s *DocIDSearcher) SetQueryNorm(qnorm float64) {
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s.scorer.SetQueryNorm(qnorm)
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}
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func (s *DocIDSearcher) Next(preAllocated *search.DocumentMatch) (*search.DocumentMatch, error) {
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docidMatch, err := s.reader.Next()
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if err != nil {
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return nil, err
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}
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if docidMatch == nil {
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return nil, nil
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}
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docMatch := s.scorer.Score(docidMatch)
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return docMatch, nil
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}
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func (s *DocIDSearcher) Advance(ID index.IndexInternalID, preAllocated *search.DocumentMatch) (*search.DocumentMatch, error) {
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docidMatch, err := s.reader.Advance(ID)
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if err != nil {
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return nil, err
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}
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if docidMatch == nil {
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return nil, nil
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}
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docMatch := s.scorer.Score(docidMatch)
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return docMatch, nil
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}
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func (s *DocIDSearcher) Close() error {
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return nil
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}
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func (s *DocIDSearcher) Min() int {
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return 0
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}
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