92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package scorch
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import (
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"bytes"
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"github.com/blevesearch/bleve/index"
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"github.com/blevesearch/bleve/index/scorch/segment"
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)
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type IndexSnapshotTermFieldReader struct {
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snapshot *IndexSnapshot
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postings []segment.PostingsList
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iterators []segment.PostingsIterator
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segmentOffset int
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includeFreq bool
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includeNorm bool
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includeTermVectors bool
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}
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func (i *IndexSnapshotTermFieldReader) Next(preAlloced *index.TermFieldDoc) (*index.TermFieldDoc, error) {
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rv := preAlloced
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if rv == nil {
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rv = &index.TermFieldDoc{}
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}
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// find the next hit
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for i.segmentOffset < len(i.postings) {
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next := i.iterators[i.segmentOffset].Next()
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if next != nil {
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// make segment number into global number by adding offset
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globalOffset := i.snapshot.offsets[i.segmentOffset]
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nnum := next.Number()
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rv.ID = docNumberToBytes(nnum + globalOffset)
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if i.includeFreq {
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rv.Freq = next.Frequency()
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}
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if i.includeNorm {
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rv.Norm = next.Norm()
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}
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if i.includeTermVectors {
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locs := next.Locations()
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rv.Vectors = make([]*index.TermFieldVector, len(locs))
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for i, loc := range locs {
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rv.Vectors[i] = &index.TermFieldVector{
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Start: loc.Start(),
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End: loc.End(),
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Pos: loc.Pos(),
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ArrayPositions: loc.ArrayPositions(),
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Field: loc.Field(),
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}
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}
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}
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return rv, nil
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}
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i.segmentOffset++
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}
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return nil, nil
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}
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func (i *IndexSnapshotTermFieldReader) Advance(ID index.IndexInternalID, preAlloced *index.TermFieldDoc) (*index.TermFieldDoc, error) {
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// FIXME do something better
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next, err := i.Next(preAlloced)
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if err != nil {
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return nil, err
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}
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if next == nil {
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return nil, nil
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}
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for bytes.Compare(next.ID, ID) < 0 {
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next, err = i.Next(preAlloced)
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if err != nil {
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return nil, err
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}
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if next == nil {
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break
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}
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}
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return next, nil
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}
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func (i *IndexSnapshotTermFieldReader) Count() uint64 {
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var rv uint64
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for _, posting := range i.postings {
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rv += posting.Count()
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}
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return rv
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}
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func (i *IndexSnapshotTermFieldReader) Close() error {
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return nil
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}
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