162 lines
4.2 KiB
Go
162 lines
4.2 KiB
Go
// Copyright (c) 2020 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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"github.com/RoaringBitmap/roaring"
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segment "github.com/blevesearch/scorch_segment_api/v2"
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"math"
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"reflect"
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)
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var reflectStaticSizeUnadornedPostingsIteratorBitmap int
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var reflectStaticSizeUnadornedPostingsIterator1Hit int
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var reflectStaticSizeUnadornedPosting int
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func init() {
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var pib unadornedPostingsIteratorBitmap
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reflectStaticSizeUnadornedPostingsIteratorBitmap = int(reflect.TypeOf(pib).Size())
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var pi1h unadornedPostingsIterator1Hit
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reflectStaticSizeUnadornedPostingsIterator1Hit = int(reflect.TypeOf(pi1h).Size())
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var up UnadornedPosting
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reflectStaticSizeUnadornedPosting = int(reflect.TypeOf(up).Size())
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}
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type unadornedPostingsIteratorBitmap struct {
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actual roaring.IntPeekable
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actualBM *roaring.Bitmap
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}
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func (i *unadornedPostingsIteratorBitmap) Next() (segment.Posting, error) {
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return i.nextAtOrAfter(0)
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}
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func (i *unadornedPostingsIteratorBitmap) Advance(docNum uint64) (segment.Posting, error) {
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return i.nextAtOrAfter(docNum)
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}
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func (i *unadornedPostingsIteratorBitmap) nextAtOrAfter(atOrAfter uint64) (segment.Posting, error) {
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docNum, exists := i.nextDocNumAtOrAfter(atOrAfter)
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if !exists {
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return nil, nil
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}
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return UnadornedPosting(docNum), nil
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}
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func (i *unadornedPostingsIteratorBitmap) nextDocNumAtOrAfter(atOrAfter uint64) (uint64, bool) {
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if i.actual == nil || !i.actual.HasNext() {
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return 0, false
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}
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i.actual.AdvanceIfNeeded(uint32(atOrAfter))
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if !i.actual.HasNext() {
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return 0, false // couldn't find anything
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}
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return uint64(i.actual.Next()), true
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}
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func (i *unadornedPostingsIteratorBitmap) Size() int {
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return reflectStaticSizeUnadornedPostingsIteratorBitmap
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}
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func (i *unadornedPostingsIteratorBitmap) ActualBitmap() *roaring.Bitmap {
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return i.actualBM
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}
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func (i *unadornedPostingsIteratorBitmap) DocNum1Hit() (uint64, bool) {
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return 0, false
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}
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func (i *unadornedPostingsIteratorBitmap) ReplaceActual(actual *roaring.Bitmap) {
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i.actualBM = actual
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i.actual = actual.Iterator()
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}
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func newUnadornedPostingsIteratorFromBitmap(bm *roaring.Bitmap) segment.PostingsIterator {
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return &unadornedPostingsIteratorBitmap{
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actualBM: bm,
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actual: bm.Iterator(),
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}
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}
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const docNum1HitFinished = math.MaxUint64
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type unadornedPostingsIterator1Hit struct {
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docNum uint64
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}
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func (i *unadornedPostingsIterator1Hit) Next() (segment.Posting, error) {
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return i.nextAtOrAfter(0)
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}
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func (i *unadornedPostingsIterator1Hit) Advance(docNum uint64) (segment.Posting, error) {
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return i.nextAtOrAfter(docNum)
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}
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func (i *unadornedPostingsIterator1Hit) nextAtOrAfter(atOrAfter uint64) (segment.Posting, error) {
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docNum, exists := i.nextDocNumAtOrAfter(atOrAfter)
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if !exists {
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return nil, nil
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}
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return UnadornedPosting(docNum), nil
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}
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func (i *unadornedPostingsIterator1Hit) nextDocNumAtOrAfter(atOrAfter uint64) (uint64, bool) {
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if i.docNum == docNum1HitFinished {
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return 0, false
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}
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if i.docNum < atOrAfter {
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// advanced past our 1-hit
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i.docNum = docNum1HitFinished // consume our 1-hit docNum
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return 0, false
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}
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docNum := i.docNum
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i.docNum = docNum1HitFinished // consume our 1-hit docNum
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return docNum, true
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}
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func (i *unadornedPostingsIterator1Hit) Size() int {
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return reflectStaticSizeUnadornedPostingsIterator1Hit
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}
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func newUnadornedPostingsIteratorFrom1Hit(docNum1Hit uint64) segment.PostingsIterator {
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return &unadornedPostingsIterator1Hit{
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docNum1Hit,
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}
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}
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type UnadornedPosting uint64
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func (p UnadornedPosting) Number() uint64 {
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return uint64(p)
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}
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func (p UnadornedPosting) Frequency() uint64 {
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return 0
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}
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func (p UnadornedPosting) Norm() float64 {
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return 0
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}
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func (p UnadornedPosting) Locations() []segment.Location {
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return nil
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}
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func (p UnadornedPosting) Size() int {
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return reflectStaticSizeUnadornedPosting
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}
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