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81 lines
2.0 KiB
81 lines
2.0 KiB
// Copyright (c) 2017 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package scorch
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import (
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"bytes"
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"reflect"
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"github.com/RoaringBitmap/roaring"
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"github.com/blevesearch/bleve/v2/size"
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index "github.com/blevesearch/bleve_index_api"
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)
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var reflectStaticSizeIndexSnapshotDocIDReader int
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func init() {
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var isdr IndexSnapshotDocIDReader
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reflectStaticSizeIndexSnapshotDocIDReader = int(reflect.TypeOf(isdr).Size())
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}
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type IndexSnapshotDocIDReader struct {
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snapshot *IndexSnapshot
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iterators []roaring.IntIterable
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segmentOffset int
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}
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func (i *IndexSnapshotDocIDReader) Size() int {
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return reflectStaticSizeIndexSnapshotDocIDReader + size.SizeOfPtr
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}
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func (i *IndexSnapshotDocIDReader) Next() (index.IndexInternalID, error) {
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for i.segmentOffset < len(i.iterators) {
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if !i.iterators[i.segmentOffset].HasNext() {
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i.segmentOffset++
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continue
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}
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next := i.iterators[i.segmentOffset].Next()
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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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return docNumberToBytes(nil, uint64(next)+globalOffset), nil
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}
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return nil, nil
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}
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func (i *IndexSnapshotDocIDReader) Advance(ID index.IndexInternalID) (index.IndexInternalID, error) {
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// FIXME do something better
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next, err := i.Next()
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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) < 0 {
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next, err = i.Next()
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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 *IndexSnapshotDocIDReader) Close() error {
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return nil
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}
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