/// <summary> Merge the TermVectors from each of the segments into the new one.</summary>
/// <throws> IOException </throws>
private void MergeVectors()
{
TermVectorsWriter termVectorsWriter = new TermVectorsWriter(directory, segment, fieldInfos);
try
{
int idx = 0;
for (System.Collections.IEnumerator iter = readers.GetEnumerator(); iter.MoveNext();)
{
SegmentReader matchingSegmentReader = matchingSegmentReaders[idx++];
TermVectorsReader matchingVectorsReader = null;
if (matchingSegmentReader != null)
{
TermVectorsReader vectorsReader = matchingSegmentReader.GetTermVectorsReaderOrig();
// If the TV* files are an older format then they cannot read raw docs:
if (vectorsReader != null && vectorsReader.CanReadRawDocs())
{
matchingVectorsReader = vectorsReader;
}
}
IndexReader reader = (IndexReader)iter.Current;
if (reader.HasDeletions())
{
CopyVectorsWithDeletions(termVectorsWriter, matchingVectorsReader, reader);
}
else
{
CopyVectorsNoDeletions(termVectorsWriter, matchingVectorsReader, reader);
}
}
}
finally
{
termVectorsWriter.Close();
}
System.String fileName = segment + "." + IndexFileNames.VECTORS_INDEX_EXTENSION;
long tvxSize = directory.FileLength(fileName);
if (4 + ((long)mergedDocs) * 16 != tvxSize)
{
// This is most likely a bug in Sun JRE 1.6.0_04/_05;
// we detect that the bug has struck, here, and
// throw an exception to prevent the corruption from
// entering the index. See LUCENE-1282 for
// details.
throw new System.SystemException("mergeVectors produced an invalid result: mergedDocs is " + mergedDocs + " but tvx size is " + tvxSize + " file=" + fileName + " file exists?=" + directory.FileExists(fileName) + "; now aborting this merge to prevent index corruption");
}
}