![Marty Schoch](/assets/img/avatar_default.png)
index id's are now opaque (until finally returned to top-level user) - the TermFieldDoc's returned by TermFieldReader no longer contain doc id - instead they return an opaque IndexInternalID - items returned are still in the "natural index order" - but that is no longer guaranteed to be "doc id order" - correct behavior requires that they all follow the same order - but not any particular order - new API FinalizeDocID which converts index internal ID's to public string ID - APIs used internally which previously took doc id now take IndexInternalID - that is DocumentFieldTerms() and DocumentFieldTermsForFields() - however, APIs that are used externally do not reflect this change - that is Document() - DocumentIDReader follows the same changes, but this is less obvious - behavior clarified, used to iterate doc ids, BUT NOT in doc id order - method STILL available to iterate doc ids in range - but again, you won't get them in any meaningful order - new method to iterate actual doc ids from list of possible ids - this was introduced to make the DocIDSearcher continue working searchers now work with the new opaque index internal doc ids - they return new DocumentMatchInternal (which does not have string ID) scorerers also work with these opaque index internal doc ids - they return DocumentMatchInternal (which does not have string ID) collectors now also perform a final step of converting the final result - they STILL return traditional DocumentMatch (with string ID) - but they now also require an IndexReader (so that they can do the conversion)
97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
// Copyright (c) 2014 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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type TermSearcher struct {
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indexReader index.IndexReader
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term string
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field string
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reader index.TermFieldReader
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scorer *scorers.TermQueryScorer
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tfd index.TermFieldDoc
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explain bool
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}
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func NewTermSearcher(indexReader index.IndexReader, term string, field string, boost float64, explain bool) (*TermSearcher, error) {
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reader, err := indexReader.TermFieldReader([]byte(term), field, true, true, true)
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if err != nil {
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return nil, err
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}
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scorer := scorers.NewTermQueryScorer(term, field, boost, indexReader.DocCount(), reader.Count(), explain)
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return &TermSearcher{
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indexReader: indexReader,
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term: term,
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field: field,
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explain: explain,
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reader: reader,
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scorer: scorer,
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}, nil
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}
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func (s *TermSearcher) Count() uint64 {
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return s.reader.Count()
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}
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func (s *TermSearcher) Weight() float64 {
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return s.scorer.Weight()
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}
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func (s *TermSearcher) SetQueryNorm(qnorm float64) {
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s.scorer.SetQueryNorm(qnorm)
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}
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func (s *TermSearcher) Next(preAllocated *search.DocumentMatchInternal) (*search.DocumentMatchInternal, error) {
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termMatch, err := s.reader.Next(s.tfd.Reset())
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if err != nil {
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return nil, err
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}
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if termMatch == nil {
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return nil, nil
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}
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// score match
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docMatch := s.scorer.Score(termMatch, preAllocated)
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// return doc match
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return docMatch, nil
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}
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func (s *TermSearcher) Advance(ID index.IndexInternalID, preAllocated *search.DocumentMatchInternal) (*search.DocumentMatchInternal, error) {
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termMatch, err := s.reader.Advance(ID, s.tfd.Reset())
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if err != nil {
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return nil, err
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}
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if termMatch == nil {
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return nil, nil
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}
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// score match
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docMatch := s.scorer.Score(termMatch, preAllocated)
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// return doc match
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return docMatch, nil
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}
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func (s *TermSearcher) Close() error {
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return s.reader.Close()
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}
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func (s *TermSearcher) Min() int {
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return 0
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}
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