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 NewDocIDSearcher(indexReader index.IndexReader, ids []string, boost float64,
explain bool) (searcher *DocIDSearcher, err error) {
reader, err := indexReader.DocIDReaderOnly(ids)
if err != nil {
return nil, err
}
scorer := scorers.NewConstantScorer(1.0, boost, explain)
return &DocIDSearcher{
scorer: scorer,
reader: reader,
count: len(ids),
}, nil
}
func NewDocIDSearcher(indexReader index.IndexReader, ids []string, boost float64,
explain bool) (searcher *DocIDSearcher, err error) {
kept := make([]string, len(ids))
copy(kept, ids)
sort.Strings(kept)
if len(ids) > 0 {
var idReader index.DocIDReader
endTerm := string(incrementBytes([]byte(kept[len(kept)-1])))
idReader, err = indexReader.DocIDReader(kept[0], endTerm)
if err != nil {
return nil, err
}
defer func() {
if cerr := idReader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
j := 0
for _, id := range kept {
doc, err := idReader.Advance(id)
if err != nil {
return nil, err
}
// Non-duplicate match
if doc == id && (j == 0 || kept[j-1] != id) {
kept[j] = id
j++
}
}
kept = kept[:j]
}
scorer := scorers.NewConstantScorer(1.0, boost, explain)
return &DocIDSearcher{
ids: kept,
scorer: scorer,
}, nil
}