/// <summary>
/// Save a single segment's info. </summary>
public override void Write(Directory dir, SegmentInfo si, FieldInfos fis, IOContext ioContext)
{
string fileName = IndexFileNames.SegmentFileName(si.Name, "", Lucene40SegmentInfoFormat.SI_EXTENSION);
si.AddFile(fileName);
IndexOutput output = dir.CreateOutput(fileName, ioContext);
bool success = false;
try
{
CodecUtil.WriteHeader(output, Lucene40SegmentInfoFormat.CODEC_NAME, Lucene40SegmentInfoFormat.VERSION_CURRENT);
// Write the Lucene version that created this segment, since 3.1
output.WriteString(si.Version);
output.WriteInt(si.DocCount);
output.WriteByte((byte)(sbyte)(si.UseCompoundFile ? SegmentInfo.YES : SegmentInfo.NO));
output.WriteStringStringMap(si.Diagnostics);
output.WriteStringStringMap(CollectionsHelper.EmptyMap <string, string>());
output.WriteStringSet(si.Files);
success = true;
}
finally
{
if (!success)
{
IOUtils.CloseWhileHandlingException(output);
si.Dir.DeleteFile(fileName);
}
else
{
output.Dispose();
}
}
}
public override FieldInfos Read(Directory directory, string segmentName, string segmentSuffix, IOContext iocontext)
{
string fileName = IndexFileNames.SegmentFileName(segmentName, "", FIELD_INFOS_EXTENSION);
IndexInput input = directory.OpenInput(fileName, iocontext);
bool success = false;
try
{
int format = input.ReadVInt();
if (format > FORMAT_MINIMUM)
{
throw new IndexFormatTooOldException(input, format, FORMAT_MINIMUM, FORMAT_CURRENT);
}
if (format < FORMAT_CURRENT)
{
throw new IndexFormatTooNewException(input, format, FORMAT_MINIMUM, FORMAT_CURRENT);
}
int size = input.ReadVInt(); //read in the size
FieldInfo[] infos = new FieldInfo[size];
for (int i = 0; i < size; i++)
{
string name = input.ReadString();
int fieldNumber = i;
byte bits = input.ReadByte();
bool isIndexed = (bits & IS_INDEXED) != 0;
bool storeTermVector = (bits & STORE_TERMVECTOR) != 0;
bool omitNorms = (bits & OMIT_NORMS) != 0;
bool storePayloads = (bits & STORE_PAYLOADS) != 0;
FieldInfo.IndexOptions indexOptions;
if (!isIndexed)
{
indexOptions = default(FieldInfo.IndexOptions);
}
else if ((bits & OMIT_TERM_FREQ_AND_POSITIONS) != 0)
{
indexOptions = FieldInfo.IndexOptions.DOCS_ONLY;
}
else if ((bits & OMIT_POSITIONS) != 0)
{
if (format <= FORMAT_OMIT_POSITIONS)
{
indexOptions = FieldInfo.IndexOptions.DOCS_AND_FREQS;
}
else
{
throw new CorruptIndexException("Corrupt fieldinfos, OMIT_POSITIONS set but format=" + format + " (resource: " + input + ")");
}
}
else
{
indexOptions = FieldInfo.IndexOptions.DOCS_AND_FREQS_AND_POSITIONS;
}
// LUCENE-3027: past indices were able to write
// storePayloads=true when omitTFAP is also true,
// which is invalid. We correct that, here:
if (indexOptions != FieldInfo.IndexOptions.DOCS_AND_FREQS_AND_POSITIONS)
{
storePayloads = false;
}
// LUCENE TO-DO
infos[i] = new FieldInfo(name, isIndexed, fieldNumber, storeTermVector, omitNorms, storePayloads, indexOptions, null, isIndexed && !omitNorms ? FieldInfo.DocValuesType_e.NUMERIC : default(FieldInfo.DocValuesType_e), CollectionsHelper.EmptyMap <string, string>());
}
if (input.FilePointer != input.Length())
{
throw new CorruptIndexException("did not read all bytes from file \"" + fileName + "\": read " + input.FilePointer + " vs size " + input.Length() + " (resource: " + input + ")");
}
FieldInfos fieldInfos = new FieldInfos(infos);
success = true;
return(fieldInfos);
}
finally
{
if (success)
{
input.Dispose();
}
else
{
IOUtils.CloseWhileHandlingException(input);
}
}
}