// Sole constructor
func newCompressingStoredFieldsReader(d store.Directory,
si *model.SegmentInfo, segmentSuffix string,
fn model.FieldInfos, ctx store.IOContext, formatName string,
compressionMode compressing.CompressionMode) (r *CompressingStoredFieldsReader, err error) {
r = &CompressingStoredFieldsReader{}
r.compressionMode = compressionMode
segment := si.Name
r.fieldInfos = fn
r.numDocs = 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.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.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
}