/// <summary>
/// Sole constructor. </summary>
public CompressingTermVectorsReader(Directory d, SegmentInfo si, string segmentSuffix, FieldInfos fn, IOContext context, string formatName, CompressionMode compressionMode)
{
this.compressionMode = compressionMode;
string segment = si.Name;
bool success = false;
fieldInfos = fn;
numDocs = si.DocCount;
ChecksumIndexInput indexStream = null;
try
{
// Load the index into memory
string indexStreamFN = IndexFileNames.SegmentFileName(segment, segmentSuffix, CompressingTermVectorsWriter.VECTORS_INDEX_EXTENSION);
indexStream = d.OpenChecksumInput(indexStreamFN, context);
string codecNameIdx = formatName + CompressingTermVectorsWriter.CODEC_SFX_IDX;
version = CodecUtil.CheckHeader(indexStream, codecNameIdx, CompressingTermVectorsWriter.VERSION_START, CompressingTermVectorsWriter.VERSION_CURRENT);
Debug.Assert(CodecUtil.HeaderLength(codecNameIdx) == indexStream.GetFilePointer());
indexReader = new CompressingStoredFieldsIndexReader(indexStream, si);
if (version >= CompressingTermVectorsWriter.VERSION_CHECKSUM)
{
indexStream.ReadVInt64(); // the end of the data file
CodecUtil.CheckFooter(indexStream);
}
else
{
#pragma warning disable 612, 618
CodecUtil.CheckEOF(indexStream);
#pragma warning restore 612, 618
}
indexStream.Dispose();
indexStream = null;
// Open the data file and read metadata
string vectorsStreamFN = IndexFileNames.SegmentFileName(segment, segmentSuffix, CompressingTermVectorsWriter.VECTORS_EXTENSION);
vectorsStream = d.OpenInput(vectorsStreamFN, context);
string codecNameDat = formatName + CompressingTermVectorsWriter.CODEC_SFX_DAT;
int version2 = CodecUtil.CheckHeader(vectorsStream, codecNameDat, CompressingTermVectorsWriter.VERSION_START, CompressingTermVectorsWriter.VERSION_CURRENT);
if (version != version2)
{
throw new Exception("Version mismatch between stored fields index and data: " + version + " != " + version2);
}
Debug.Assert(CodecUtil.HeaderLength(codecNameDat) == vectorsStream.GetFilePointer());
packedIntsVersion = vectorsStream.ReadVInt32();
chunkSize = vectorsStream.ReadVInt32();
decompressor = compressionMode.NewDecompressor();
this.reader = new BlockPackedReaderIterator(vectorsStream, packedIntsVersion, CompressingTermVectorsWriter.BLOCK_SIZE, 0);
success = true;
}
finally
{
if (!success)
{
IOUtils.DisposeWhileHandlingException(this, indexStream);
}
}
}
/// <summary>
/// Sole constructor. </summary>
public CompressingStoredFieldsReader(Directory d, SegmentInfo si, string segmentSuffix, FieldInfos fn, IOContext context, string formatName, CompressionMode compressionMode)
{
this.compressionMode = compressionMode;
string segment = si.Name;
bool success = false;
fieldInfos = fn;
numDocs = si.DocCount;
ChecksumIndexInput indexStream = null;
try
{
string indexStreamFN = IndexFileNames.SegmentFileName(segment, segmentSuffix, Lucene40StoredFieldsWriter.FIELDS_INDEX_EXTENSION);
string fieldsStreamFN = IndexFileNames.SegmentFileName(segment, segmentSuffix, Lucene40StoredFieldsWriter.FIELDS_EXTENSION);
// Load the index into memory
indexStream = d.OpenChecksumInput(indexStreamFN, context);
string codecNameIdx = formatName + CompressingStoredFieldsWriter.CODEC_SFX_IDX;
version = CodecUtil.CheckHeader(indexStream, codecNameIdx, CompressingStoredFieldsWriter.VERSION_START, CompressingStoredFieldsWriter.VERSION_CURRENT);
if (Debugging.AssertsEnabled)
{
Debugging.Assert(CodecUtil.HeaderLength(codecNameIdx) == indexStream.Position); // LUCENENET specific: Renamed from getFilePointer() to match FileStream
}
indexReader = new CompressingStoredFieldsIndexReader(indexStream, si);
long maxPointer = -1;
if (version >= CompressingStoredFieldsWriter.VERSION_CHECKSUM)
{
maxPointer = indexStream.ReadVInt64();
CodecUtil.CheckFooter(indexStream);
}
else
{
#pragma warning disable 612, 618
CodecUtil.CheckEOF(indexStream);
#pragma warning restore 612, 618
}
indexStream.Dispose();
indexStream = null;
// Open the data file and read metadata
fieldsStream = d.OpenInput(fieldsStreamFN, context);
if (version >= CompressingStoredFieldsWriter.VERSION_CHECKSUM)
{
if (maxPointer + CodecUtil.FooterLength() != fieldsStream.Length)
{
throw new CorruptIndexException("Invalid fieldsStream maxPointer (file truncated?): maxPointer=" + maxPointer + ", length=" + fieldsStream.Length);
}
}
else
{
maxPointer = fieldsStream.Length;
}
this.maxPointer = maxPointer;
string codecNameDat = formatName + CompressingStoredFieldsWriter.CODEC_SFX_DAT;
int fieldsVersion = CodecUtil.CheckHeader(fieldsStream, codecNameDat, CompressingStoredFieldsWriter.VERSION_START, CompressingStoredFieldsWriter.VERSION_CURRENT);
if (version != fieldsVersion)
{
throw new CorruptIndexException("Version mismatch between stored fields index and data: " + version + " != " + fieldsVersion);
}
if (Debugging.AssertsEnabled)
{
Debugging.Assert(CodecUtil.HeaderLength(codecNameDat) == fieldsStream.Position); // LUCENENET specific: Renamed from getFilePointer() to match FileStream
}
if (version >= CompressingStoredFieldsWriter.VERSION_BIG_CHUNKS)
{
chunkSize = fieldsStream.ReadVInt32();
}
else
{
chunkSize = -1;
}
packedIntsVersion = fieldsStream.ReadVInt32();
decompressor = compressionMode.NewDecompressor();
this.bytes = new BytesRef();
success = true;
}
finally
{
if (!success)
{
IOUtils.DisposeWhileHandlingException(this, indexStream);
}
}
}