/
cursor_segment_roaring_set.go
53 lines (45 loc) · 1.54 KB
/
cursor_segment_roaring_set.go
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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: hello@weaviate.io
//
package lsmkv
import (
"github.com/weaviate/weaviate/adapters/repos/db/lsmkv/segmentindex"
roaringset2 "github.com/weaviate/weaviate/adapters/repos/db/roaringset"
)
func (s *segment) newRoaringSetCursor() *roaringset2.SegmentCursor {
return roaringset2.NewSegmentCursor(s.contents[s.dataStartPos:s.dataEndPos],
&roaringSetSeeker{s.index})
}
func (sg *SegmentGroup) newRoaringSetCursors() ([]roaringset2.InnerCursor, func()) {
sg.maintenanceLock.RLock()
out := make([]roaringset2.InnerCursor, len(sg.segments))
for i, segment := range sg.segments {
out[i] = segment.newRoaringSetCursor()
}
return out, sg.maintenanceLock.RUnlock
}
// diskIndex returns node's Start and End offsets
// taking into account HeaderSize. SegmentCursor of RoaringSet
// accepts only payload part of underlying segment content, therefore
// offsets should be adjusted and reduced by HeaderSize
type roaringSetSeeker struct {
diskIndex diskIndex
}
func (s *roaringSetSeeker) Seek(key []byte) (segmentindex.Node, error) {
node, err := s.diskIndex.Seek(key)
if err != nil {
return segmentindex.Node{}, err
}
return segmentindex.Node{
Key: node.Key,
Start: node.Start - segmentindex.HeaderSize,
End: node.End - segmentindex.HeaderSize,
}, nil
}