110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
// Copyright (c) 2015 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 searcher
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import (
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"reflect"
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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/scorer"
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"github.com/blevesearch/bleve/size"
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)
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var reflectStaticSizeDocIDSearcher int
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func init() {
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var ds DocIDSearcher
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reflectStaticSizeDocIDSearcher = int(reflect.TypeOf(ds).Size())
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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 *scorer.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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options search.SearcherOptions) (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 := scorer.NewConstantScorer(1.0, boost, options)
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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) Size() int {
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return reflectStaticSizeDocIDSearcher + size.SizeOfPtr +
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s.reader.Size() +
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s.scorer.Size()
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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(ctx *search.SearchContext) (*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(ctx, docidMatch)
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return docMatch, nil
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}
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func (s *DocIDSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*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(ctx, 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 s.reader.Close()
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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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func (s *DocIDSearcher) DocumentMatchPoolSize() int {
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return 1
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}
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