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search_match_all.go
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search_match_all.go
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// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package searchers
import (
"github.com/blevesearch/bleve/index"
"github.com/blevesearch/bleve/search"
"github.com/blevesearch/bleve/search/scorers"
)
type MatchAllSearcher struct {
indexReader index.IndexReader
reader index.DocIDReader
scorer *scorers.ConstantScorer
}
func NewMatchAllSearcher(indexReader index.IndexReader, boost float64, explain bool) (*MatchAllSearcher, error) {
reader, err := indexReader.DocIDReader("", "")
if err != nil {
return nil, err
}
scorer := scorers.NewConstantScorer(1.0, boost, explain)
return &MatchAllSearcher{
indexReader: indexReader,
reader: reader,
scorer: scorer,
}, nil
}
func (s *MatchAllSearcher) Count() uint64 {
return s.indexReader.DocCount()
}
func (s *MatchAllSearcher) Weight() float64 {
return s.scorer.Weight()
}
func (s *MatchAllSearcher) SetQueryNorm(qnorm float64) {
s.scorer.SetQueryNorm(qnorm)
}
func (s *MatchAllSearcher) Next() (*search.DocumentMatch, error) {
id, err := s.reader.Next()
if err != nil {
return nil, err
}
if id == "" {
return nil, nil
}
// score match
docMatch := s.scorer.Score(id)
// return doc match
return docMatch, nil
}
func (s *MatchAllSearcher) Advance(ID string) (*search.DocumentMatch, error) {
id, err := s.reader.Advance(ID)
if err != nil {
return nil, err
}
if id == "" {
return nil, nil
}
// score match
docMatch := s.scorer.Score(id)
// return doc match
return docMatch, nil
}
func (s *MatchAllSearcher) Close() error {
return s.reader.Close()
}
func (s *MatchAllSearcher) Min() int {
return 0
}