func NewLucene41PostingsReader(dir store.Directory, fis FieldInfos, si SegmentInfo,
ctx store.IOContext, segmentSuffix string) (r PostingsReaderBase, err error) {
log.Print("Initializing Lucene41PostingsReader...")
success := false
var docIn, posIn, payIn store.IndexInput = nil, nil, nil
defer func() {
if !success {
log.Print("Failed to initialize Lucene41PostingsReader.")
if err != nil {
log.Print("DEBUG ", err)
}
util.CloseWhileSuppressingError(docIn, posIn, payIn)
}
}()
docIn, err = dir.OpenInput(util.SegmentFileName(si.name, segmentSuffix, LUCENE41_DOC_EXTENSION), ctx)
if err != nil {
return r, err
}
_, err = codec.CheckHeader(docIn, LUCENE41_DOC_CODEC, LUCENE41_VERSION_CURRENT, LUCENE41_VERSION_CURRENT)
if err != nil {
return r, err
}
forUtil, err := NewForUtil(docIn)
if err != nil {
return r, err
}
if fis.hasProx {
posIn, err = dir.OpenInput(util.SegmentFileName(si.name, segmentSuffix, LUCENE41_POS_EXTENSION), ctx)
if err != nil {
return r, err
}
_, err = codec.CheckHeader(posIn, LUCENE41_POS_CODEC, LUCENE41_VERSION_CURRENT, LUCENE41_VERSION_CURRENT)
if err != nil {
return r, err
}
if fis.hasPayloads || fis.hasOffsets {
payIn, err = dir.OpenInput(util.SegmentFileName(si.name, segmentSuffix, LUCENE41_PAY_EXTENSION), ctx)
if err != nil {
return r, err
}
_, err = codec.CheckHeader(payIn, LUCENE41_PAY_CODEC, LUCENE41_VERSION_CURRENT, LUCENE41_VERSION_CURRENT)
if err != nil {
return r, err
}
}
}
success = true
return &Lucene41PostingsReader{docIn, posIn, payIn, forUtil}, nil
}
func newLucene42DocValuesProducer(state SegmentReadState,
dataCodec, dataExtension, metaCodec, metaExtension string) (dvp *Lucene42DocValuesProducer, err error) {
dvp = &Lucene42DocValuesProducer{}
dvp.maxDoc = int(state.segmentInfo.docCount)
metaName := util.SegmentFileName(state.segmentInfo.name, state.segmentSuffix, metaExtension)
// read in the entries from the metadata file.
in, err := state.dir.OpenInput(metaName, state.context)
if err != nil {
return dvp, err
}
success := false
defer func() {
if success {
err = util.Close(in)
} else {
util.CloseWhileSuppressingError(in)
}
}()
version, err := codec.CheckHeader(in, metaCodec, LUCENE42_DV_VERSION_START, LUCENE42_DV_VERSION_CURRENT)
if err != nil {
return dvp, err
}
dvp.numerics = make(map[int]NumericEntry)
dvp.binaries = make(map[int]BinaryEntry)
dvp.fsts = make(map[int]FSTEntry)
err = dvp.readFields(in, state.fieldInfos)
if err != nil {
return dvp, err
}
success = true
success = false
dataName := util.SegmentFileName(state.segmentInfo.name, state.segmentSuffix, dataExtension)
dvp.data, err = state.dir.OpenInput(dataName, state.context)
if err != nil {
return dvp, err
}
version2, err := codec.CheckHeader(dvp.data, dataCodec, LUCENE42_DV_VERSION_START, LUCENE42_DV_VERSION_CURRENT)
if err != nil {
return dvp, err
}
if version != version2 {
return dvp, errors.New("Format versions mismatch")
}
return dvp, nil
}
func TestReadingFromSlicedIndexInputOSX(t *testing.T) {
path := "../search/testdata/osx/belfrysample"
d, err := OpenFSDirectory(path)
if err != nil {
t.Error(err)
}
ctx := NewIOContextBool(false)
cd, err := NewCompoundFileDirectory(d, "_0.cfs", ctx, false)
name := util.SegmentFileName("_0", "Lucene41_0", "pos")
posIn, err := cd.OpenInput(name, ctx)
if err != nil {
t.Error(err)
}
t.Log(posIn)
codec.CheckHeader(posIn, "Lucene41PostingsWriterPos", 0, 0)
// codec header mismatch: actual header=0 vs expected header=1071082519 (resource: SlicedIndexInput(SlicedIndexInput(_0_Lucene41_0.pos in SimpleFSIndexInput(path='/private/tmp/kc/index/belfrysample/_0.cfs')) in SimpleFSIndexInput(path='/private/tmp/kc/index/belfrysample/_0.cfs') slice=1461:3426))
}
func newSegmentCoreReaders(owner *SegmentReader, dir store.Directory, si SegmentInfoPerCommit,
context store.IOContext, termsIndexDivisor int) (self SegmentCoreReaders, err error) {
if termsIndexDivisor == 0 {
panic("indexDivisor must be < 0 (don't load terms index) or greater than 0 (got 0)")
}
log.Printf("Initializing SegmentCoreReaders from directory: %v", dir)
self = SegmentCoreReaders{refCount: 1}
log.Print("Initializing listeners...")
self.addListener = make(chan CoreClosedListener)
self.removeListener = make(chan CoreClosedListener)
self.notifyListener = make(chan *SegmentReader)
// TODO re-enable later
go func() { // ensure listners are synchronized
coreClosedListeners := make([]CoreClosedListener, 0)
isRunning := true
var listener CoreClosedListener
for isRunning {
log.Print("Listening for events...")
select {
case listener = <-self.addListener:
coreClosedListeners = append(coreClosedListeners, listener)
case listener = <-self.removeListener:
n := len(coreClosedListeners)
for i, v := range coreClosedListeners {
if v == listener {
newListeners := make([]CoreClosedListener, 0, n-1)
newListeners = append(newListeners, coreClosedListeners[0:i]...)
newListeners = append(newListeners, coreClosedListeners[i+1:]...)
coreClosedListeners = newListeners
break
}
}
case owner := <-self.notifyListener:
log.Print("Shutting down SegmentCoreReaders...")
isRunning = false
for _, v := range coreClosedListeners {
v.onClose(owner)
}
}
}
log.Print("Listeners are done.")
}()
success := false
defer func() {
if !success {
log.Print("Failed to initialize SegmentCoreReaders.")
self.decRef()
}
}()
codec := si.info.codec
log.Print("Obtaining CFS Directory...")
var cfsDir store.Directory // confusing name: if (cfs) its the cfsdir, otherwise its the segment's directory.
if si.info.isCompoundFile {
log.Print("Detected CompoundFile.")
name := util.SegmentFileName(si.info.name, "", store.COMPOUND_FILE_EXTENSION)
self.cfsReader, err = store.NewCompoundFileDirectory(dir, name, context, false)
if err != nil {
return self, err
}
log.Printf("CompoundFileDirectory: %v", self.cfsReader)
cfsDir = self.cfsReader
} else {
cfsDir = dir
}
log.Printf("CFS Directory: %v", cfsDir)
log.Print("Reading FieldInfos...")
self.fieldInfos, err = codec.ReadFieldInfos(cfsDir, si.info.name, store.IO_CONTEXT_READONCE)
if err != nil {
return self, err
}
self.termsIndexDivisor = termsIndexDivisor
log.Print("Obtaining SegmentReadState...")
segmentReadState := newSegmentReadState(cfsDir, si.info, self.fieldInfos, context, termsIndexDivisor)
// Ask codec for its Fields
log.Print("Obtaining FieldsProducer...")
self.fields, err = codec.GetFieldsProducer(segmentReadState)
if err != nil {
return self, err
}
// assert fields != null;
// ask codec for its Norms:
// TODO: since we don't write any norms file if there are no norms,
// kinda jaky to assume the codec handles the case of no norms file at all gracefully?!
if self.fieldInfos.hasDocValues {
log.Print("Obtaining DocValuesProducer...")
self.dvProducer, err = codec.GetDocValuesProducer(segmentReadState)
if err != nil {
return self, err
}
// assert dvProducer != null;
} else {
// self.dvProducer = nil
}
if self.fieldInfos.hasNorms {
log.Print("Obtaining NormsDocValuesProducer...")
self.normsProducer, err = codec.GetNormsDocValuesProducer(segmentReadState)
if err != nil {
return self, err
}
// assert normsProducer != null;
} else {
// self.normsProducer = nil
}
log.Print("Obtaining StoredFieldsReader...")
self.fieldsReaderOrig, err = si.info.codec.GetStoredFieldsReader(cfsDir, si.info, self.fieldInfos, context)
if err != nil {
return self, err
}
if self.fieldInfos.hasVectors { // open term vector files only as needed
log.Print("Obtaining TermVectorsReader...")
self.termVectorsReaderOrig, err = si.info.codec.GetTermVectorsReader(cfsDir, si.info, self.fieldInfos, context)
if err != nil {
return self, err
}
} else {
// self.termVectorsReaderOrig = nil
}
log.Print("Success")
success = true
// Must assign this at the end -- if we hit an
// exception above core, we don't want to attempt to
// purge the FieldCache (will hit NPE because core is
// not assigned yet).
self.owner = owner
return self, nil
}
// Field flags
LUCENE42_FI_IS_INDEXED = 0x1
LUCENE42_FI_STORE_TERMVECTOR = 0x2
LUCENE42_FI_STORE_OFFSETS_IN_POSTINGS = 0x4
LUCENE42_FI_OMIT_NORMS = 0x10
LUCENE42_FI_STORE_PAYLOADS = 0x20
LUCENE42_FI_OMIT_TERM_FREQ_AND_POSITIONS = 0x40
LUCENE42_FI_OMIT_POSITIONS = 0x80
)
var (
Lucene42FieldInfosReader = func(dir store.Directory, segment string, context store.IOContext) (fi FieldInfos, err error) {
log.Printf("Reading FieldInfos from %v...", dir)
fi = FieldInfos{}
fileName := util.SegmentFileName(segment, "", LUCENE42_FI_EXTENSION)
log.Printf("Segment: %v", fileName)
input, err := dir.OpenInput(fileName, context)
if err != nil {
return fi, err
}
log.Printf("Reading %v", input)
success := false
defer func() {
if success {
input.Close()
} else {
util.CloseWhileHandlingError(err, input)
}
}()
// CompressingStoredFieldsReader.java L90
func newCompressingStoredFieldsReader(d store.Directory, si SegmentInfo, segmentSuffix string, fn FieldInfos,
ctx store.IOContext, formatName string, compressionMode codec.CompressionMode) (r *CompressingStoredFieldsReader, err error) {
r = &CompressingStoredFieldsReader{}
r.compressionMode = compressionMode
segment := si.name
r.fieldInfos = fn
r.numDocs = int(si.docCount)
var indexStream store.IndexInput
success := false
defer func() {
if !success {
log.Println("Failed to initialize CompressionStoredFieldsReader.")
if err != nil {
log.Print(err)
}
util.Close(r, indexStream)
}
}()
// Load the index into memory
indexStreamFN := util.SegmentFileName(segment, segmentSuffix, LUCENE40_SF_FIELDS_INDEX_EXTENSION)
indexStream, err = d.OpenInput(indexStreamFN, ctx)
if err != nil {
return nil, err
}
codecNameIdx := formatName + CODEC_SFX_IDX
codec.CheckHeader(indexStream, codecNameIdx, CODEC_SFX_VERSION_START, CODEC_SFX_VERSION_CURRENT)
if int64(codec.HeaderLength(codecNameIdx)) != indexStream.FilePointer() {
panic("assert fail")
}
r.indexReader, err = newCompressingStoredFieldsIndexReader(indexStream, si)
if err != nil {
return nil, err
}
err = indexStream.Close()
if err != nil {
return nil, err
}
indexStream = nil
// Open the data file and read metadata
fieldsStreamFN := util.SegmentFileName(segment, segmentSuffix, LUCENE40_SF_FIELDS_EXTENSION)
r.fieldsStream, err = d.OpenInput(fieldsStreamFN, ctx)
if err != nil {
return nil, err
}
codecNameDat := formatName + CODEC_SFX_DAT
codec.CheckHeader(r.fieldsStream, codecNameDat, CODEC_SFX_VERSION_START, CODEC_SFX_VERSION_CURRENT)
if int64(codec.HeaderLength(codecNameDat)) != r.fieldsStream.FilePointer() {
panic("assert fail")
}
n, err := r.fieldsStream.ReadVInt()
if err != nil {
return nil, err
}
r.packedIntsVersion = int(n)
r.decompressor = compressionMode.NewDecompressor()
r.bytes = make([]byte, 0)
success = true
return r, nil
}
func readEntries(handle IndexInputSlicer, dir Directory, name string) (mapping map[string]FileEntry, err error) {
var stream, entriesStream IndexInput = nil, nil
defer func() {
err = util.CloseWhileHandlingError(err, stream, entriesStream)
}()
// read the first VInt. If it is negative, it's the version number
// otherwise it's the count (pre-3.1 indexes)
mapping = make(map[string]FileEntry)
stream = handle.openFullSlice()
log.Printf("Reading from stream: %v", stream)
firstInt, err := stream.ReadVInt()
if err != nil {
return mapping, err
}
// impossible for 3.0 to have 63 files in a .cfs, CFS writer was not visible
// and separate norms/etc are outside of cfs.
if firstInt == int32(CODEC_MAGIC_BYTE1) {
if secondByte, err := stream.ReadByte(); err == nil {
if thirdByte, err := stream.ReadByte(); err == nil {
if fourthByte, err := stream.ReadByte(); err == nil {
if secondByte != CODEC_MAGIC_BYTE2 ||
thirdByte != CODEC_MAGIC_BYTE3 ||
fourthByte != CODEC_MAGIC_BYTE4 {
return mapping, errors.New(fmt.Sprintf(
"Illegal/impossible header for CFS file: %v,%v,%v",
secondByte, thirdByte, fourthByte))
}
}
}
}
if err != nil {
return mapping, err
}
_, err = codec.CheckHeaderNoMagic(stream, CFD_DATA_CODEC, CFD_VERSION_START, CFD_VERSION_START)
if err != nil {
return mapping, err
}
entriesFileName := util.SegmentFileName(util.StripExtension(name), "", COMPOUND_FILE_ENTRIES_EXTENSION)
entriesStream, err = dir.OpenInput(entriesFileName, IO_CONTEXT_READONCE)
if err != nil {
return mapping, err
}
_, err = codec.CheckHeader(entriesStream, CFD_ENTRY_CODEC, CFD_VERSION_START, CFD_VERSION_START)
if err != nil {
return mapping, err
}
numEntries, err := entriesStream.ReadVInt()
if err != nil {
return mapping, err
}
log.Printf("Entries number: %v", numEntries)
for i := int32(0); i < numEntries; i++ {
id, err := entriesStream.ReadString()
if err != nil {
return mapping, err
}
if _, ok := mapping[id]; ok {
return mapping, errors.New(fmt.Sprintf(
"Duplicate cfs entry id=%v in CFS: %v", id, entriesStream))
}
log.Printf("Found entry: %v", id)
offset, err := entriesStream.ReadLong()
if err != nil {
return mapping, err
}
length, err := entriesStream.ReadLong()
if err != nil {
return mapping, err
}
mapping[id] = FileEntry{offset, length}
}
} else {
// TODO remove once 3.x is not supported anymore
panic("not supported yet; will also be obsolete soon")
}
return mapping, nil
}
func newBlockTreeTermsReader(dir store.Directory, fieldInfos FieldInfos, info SegmentInfo,
postingsReader PostingsReaderBase, ctx store.IOContext,
segmentSuffix string, indexDivisor int) (p FieldsProducer, err error) {
log.Print("Initializing BlockTreeTermsReader...")
fp := &BlockTreeTermsReader{
postingsReader: postingsReader,
fields: make(map[string]FieldReader),
segment: info.name,
}
fp.in, err = dir.OpenInput(util.SegmentFileName(info.name, segmentSuffix, BTT_EXTENSION), ctx)
if err != nil {
return fp, err
}
success := false
var indexIn store.IndexInput
defer func() {
if !success {
log.Print("Failed to initialize BlockTreeTermsReader.")
if err != nil {
log.Print("DEBUG ", err)
}
// this.close() will close in:
util.CloseWhileSuppressingError(indexIn, fp)
}
}()
fp.version, err = fp.readHeader(fp.in)
if err != nil {
return fp, err
}
log.Printf("Version: %v", fp.version)
if indexDivisor != -1 {
indexIn, err = dir.OpenInput(util.SegmentFileName(info.name, segmentSuffix, BTT_INDEX_EXTENSION), ctx)
if err != nil {
return fp, err
}
indexVersion, err := fp.readIndexHeader(indexIn)
if err != nil {
return fp, err
}
log.Printf("Index version: %v", indexVersion)
if int(indexVersion) != fp.version {
return fp, errors.New(fmt.Sprintf("mixmatched version files: %v=%v,%v=%v", fp.in, fp.version, indexIn, indexVersion))
}
}
// Have PostingsReader init itself
postingsReader.Init(fp.in)
// Read per-field details
fp.seekDir(fp.in, fp.dirOffset)
if indexDivisor != -1 {
fp.seekDir(indexIn, fp.indexDirOffset)
}
numFields, err := fp.in.ReadVInt()
if err != nil {
return fp, err
}
log.Printf("Fields number: %v", numFields)
if numFields < 0 {
return fp, errors.New(fmt.Sprintf("invalid numFields: %v (resource=%v)", numFields, fp.in))
}
for i := int32(0); i < numFields; i++ {
log.Printf("Next field...")
field, err := fp.in.ReadVInt()
if err != nil {
return fp, err
}
log.Printf("Field: %v", field)
numTerms, err := fp.in.ReadVLong()
if err != nil {
return fp, err
}
// assert numTerms >= 0
log.Printf("Terms number: %v", numTerms)
numBytes, err := fp.in.ReadVInt()
if err != nil {
return fp, err
}
log.Printf("Bytes number: %v", numBytes)
rootCode := make([]byte, numBytes)
err = fp.in.ReadBytes(rootCode)
if err != nil {
return fp, err
}
fieldInfo := fieldInfos.byNumber[field]
// assert fieldInfo != nil
var sumTotalTermFreq int64
if fieldInfo.indexOptions == INDEX_OPT_DOCS_ONLY {
sumTotalTermFreq = -1
} else {
sumTotalTermFreq, err = fp.in.ReadVLong()
if err != nil {
return fp, err
}
}
sumDocFreq, err := fp.in.ReadVLong()
if err != nil {
return fp, err
}
docCount, err := fp.in.ReadVInt()
if err != nil {
return fp, err
}
log.Printf("DocCount: %v", docCount)
if docCount < 0 || docCount > info.docCount { // #docs with field must be <= #docs
return fp, errors.New(fmt.Sprintf(
"invalid docCount: %v maxDoc: %v (resource=%v)",
docCount, info.docCount, fp.in))
}
if sumDocFreq < int64(docCount) { // #postings must be >= #docs with field
return fp, errors.New(fmt.Sprintf(
"invalid sumDocFreq: %v docCount: %v (resource=%v)",
sumDocFreq, docCount, fp.in))
}
if sumTotalTermFreq != -1 && sumTotalTermFreq < sumDocFreq { // #positions must be >= #postings
return fp, errors.New(fmt.Sprintf(
"invalid sumTotalTermFreq: %v sumDocFreq: %v (resource=%v)",
sumTotalTermFreq, sumDocFreq, fp.in))
}
var indexStartFP int64
if indexDivisor != -1 {
indexStartFP, err = indexIn.ReadVLong()
if err != nil {
return fp, err
}
}
log.Printf("indexStartFP: %v", indexStartFP)
if _, ok := fp.fields[fieldInfo.name]; ok {
return fp, errors.New(fmt.Sprintf(
"duplicate field: %v (resource=%v)", fieldInfo.name, fp.in))
}
fp.fields[fieldInfo.name], err = newFieldReader(fp,
fieldInfo, numTerms, rootCode, sumTotalTermFreq,
sumDocFreq, docCount, indexStartFP, indexIn)
if err != nil {
return fp, err
}
log.Print("DEBUG field processed.")
}
if indexDivisor != -1 {
err = indexIn.Close()
if err != nil {
return fp, err
}
}
success = true
return fp, nil
}