forked from blevesearch/bleve
/
snapshot_index_doc.go
67 lines (60 loc) · 1.7 KB
/
snapshot_index_doc.go
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// Copyright (c) 2017 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 scorch
import (
"bytes"
"github.com/RoaringBitmap/roaring"
"github.com/blevesearch/bleve/index"
)
type IndexSnapshotDocIDReader struct {
snapshot *IndexSnapshot
iterators []roaring.IntIterable
segmentOffset int
}
func (i *IndexSnapshotDocIDReader) Next() (index.IndexInternalID, error) {
for i.segmentOffset < len(i.iterators) {
if !i.iterators[i.segmentOffset].HasNext() {
i.segmentOffset++
continue
}
next := i.iterators[i.segmentOffset].Next()
// make segment number into global number by adding offset
globalOffset := i.snapshot.offsets[i.segmentOffset]
return docNumberToBytes(nil, uint64(next)+globalOffset), nil
}
return nil, nil
}
func (i *IndexSnapshotDocIDReader) Advance(ID index.IndexInternalID) (index.IndexInternalID, error) {
// FIXME do something better
next, err := i.Next()
if err != nil {
return nil, err
}
if next == nil {
return nil, nil
}
for bytes.Compare(next, ID) < 0 {
next, err = i.Next()
if err != nil {
return nil, err
}
if next == nil {
break
}
}
return next, nil
}
func (i *IndexSnapshotDocIDReader) Close() error {
return nil
}