public override int Merge(MergeState mergeState)
{
int docCount = 0;
int idx = 0;
foreach (AtomicReader reader in mergeState.Readers)
{
SegmentReader matchingSegmentReader = mergeState.MatchingSegmentReaders[idx++];
CompressingStoredFieldsReader matchingFieldsReader = null;
if (matchingSegmentReader != null)
{
StoredFieldsReader fieldsReader = matchingSegmentReader.FieldsReader;
// we can only bulk-copy if the matching reader is also a CompressingStoredFieldsReader
if (fieldsReader != null && fieldsReader is CompressingStoredFieldsReader compressingStoredFieldsReader)
{
matchingFieldsReader = compressingStoredFieldsReader;
}
}
int maxDoc = reader.MaxDoc;
IBits liveDocs = reader.LiveDocs;
if (matchingFieldsReader is null || matchingFieldsReader.Version != VERSION_CURRENT || matchingFieldsReader.CompressionMode != compressionMode || matchingFieldsReader.ChunkSize != chunkSize) // the way data is decompressed depends on the chunk size - means reader version is not the same as the writer version
{
// naive merge...
for (int i = NextLiveDoc(0, liveDocs, maxDoc); i < maxDoc; i = NextLiveDoc(i + 1, liveDocs, maxDoc))
{
Document doc = reader.Document(i);
AddDocument(doc, mergeState.FieldInfos);
++docCount;
mergeState.CheckAbort.Work(300);
}
}
public override int Merge(MergeState mergeState)
{
int docCount = 0;
int idx = 0;
foreach (AtomicReader reader in mergeState.Readers)
{
SegmentReader matchingSegmentReader = mergeState.MatchingSegmentReaders[idx++];
CompressingStoredFieldsReader matchingFieldsReader = null;
if (matchingSegmentReader != null)
{
StoredFieldsReader fieldsReader = matchingSegmentReader.FieldsReader;
// we can only bulk-copy if the matching reader is also a CompressingStoredFieldsReader
if (fieldsReader != null && fieldsReader is CompressingStoredFieldsReader compressingStoredFieldsReader)
{
matchingFieldsReader = compressingStoredFieldsReader;
}
}
int maxDoc = reader.MaxDoc;
IBits liveDocs = reader.LiveDocs;
if (matchingFieldsReader == null || matchingFieldsReader.Version != VERSION_CURRENT || matchingFieldsReader.CompressionMode != compressionMode || matchingFieldsReader.ChunkSize != chunkSize) // the way data is decompressed depends on the chunk size - means reader version is not the same as the writer version
{
// naive merge...
for (int i = NextLiveDoc(0, liveDocs, maxDoc); i < maxDoc; i = NextLiveDoc(i + 1, liveDocs, maxDoc))
{
Document doc = reader.Document(i);
AddDocument(doc, mergeState.FieldInfos);
++docCount;
mergeState.CheckAbort.Work(300);
}
}
else
{
int docID = NextLiveDoc(0, liveDocs, maxDoc);
if (docID < maxDoc)
{
// not all docs were deleted
CompressingStoredFieldsReader.ChunkIterator it = matchingFieldsReader.GetChunkIterator(docID);
int[] startOffsets = Arrays.Empty <int>();
do
{
// go to the next chunk that contains docID
it.Next(docID);
// transform lengths into offsets
if (startOffsets.Length < it.chunkDocs)
{
startOffsets = new int[ArrayUtil.Oversize(it.chunkDocs, 4)];
}
for (int i = 1; i < it.chunkDocs; ++i)
{
startOffsets[i] = startOffsets[i - 1] + it.lengths[i - 1];
}
if (numBufferedDocs == 0 && startOffsets[it.chunkDocs - 1] < chunkSize && startOffsets[it.chunkDocs - 1] + it.lengths[it.chunkDocs - 1] >= chunkSize && NextDeletedDoc(it.docBase, liveDocs, it.docBase + it.chunkDocs) == it.docBase + it.chunkDocs) // no deletion in the chunk - chunk is large enough - chunk is small enough - starting a new chunk
{
if (Debugging.AssertsEnabled)
{
Debugging.Assert(docID == it.docBase);
}
// no need to decompress, just copy data
indexWriter.WriteIndex(it.chunkDocs, fieldsStream.Position); // LUCENENET specific: Renamed from getFilePointer() to match FileStream
WriteHeader(this.docBase, it.chunkDocs, it.numStoredFields, it.lengths);
it.CopyCompressedData(fieldsStream);
this.docBase += it.chunkDocs;
docID = NextLiveDoc(it.docBase + it.chunkDocs, liveDocs, maxDoc);
docCount += it.chunkDocs;
mergeState.CheckAbort.Work(300 * it.chunkDocs);
}
else
{
// decompress
it.Decompress();
if (startOffsets[it.chunkDocs - 1] + it.lengths[it.chunkDocs - 1] != it.bytes.Length)
{
throw new CorruptIndexException("Corrupted: expected chunk size=" + startOffsets[it.chunkDocs - 1] + it.lengths[it.chunkDocs - 1] + ", got " + it.bytes.Length);
}
// copy non-deleted docs
for (; docID < it.docBase + it.chunkDocs; docID = NextLiveDoc(docID + 1, liveDocs, maxDoc))
{
int diff = docID - it.docBase;
StartDocument(it.numStoredFields[diff]);
bufferedDocs.WriteBytes(it.bytes.Bytes, it.bytes.Offset + startOffsets[diff], it.lengths[diff]);
FinishDocument();
++docCount;
mergeState.CheckAbort.Work(300);
}
}
} while (docID < maxDoc);
it.CheckIntegrity();
}
}
}
Finish(mergeState.FieldInfos, docCount);
return(docCount);
}
