/// <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
{
for (int r = 0; r < readers.Count; r++)
{
Monodoc.Lucene.Net.Index.IndexReader reader = (Monodoc.Lucene.Net.Index.IndexReader)readers[r];
int maxDoc = reader.MaxDoc();
for (int docNum = 0; docNum < maxDoc; docNum++)
{
// skip deleted docs
if (reader.IsDeleted(docNum))
{
continue;
}
termVectorsWriter.OpenDocument();
// get all term vectors
TermFreqVector[] sourceTermVector = reader.GetTermFreqVectors(docNum);
if (sourceTermVector != null)
{
for (int f = 0; f < sourceTermVector.Length; f++)
{
// translate Field numbers
TermFreqVector termVector = sourceTermVector[f];
termVectorsWriter.OpenField(termVector.GetField());
System.String[] terms = termVector.GetTerms();
int[] freqs = termVector.GetTermFrequencies();
for (int t = 0; t < terms.Length; t++)
{
termVectorsWriter.AddTerm(terms[t], freqs[t]);
}
}
termVectorsWriter.CloseDocument();
}
}
}
}
finally
{
termVectorsWriter.Close();
}
}
private void WritePostings(Posting[] postings, System.String segment)
{
OutputStream freq = null, prox = null;
TermInfosWriter tis = null;
TermVectorsWriter termVectorWriter = null;
try
{
//open files for inverse index storage
freq = directory.CreateFile(segment + ".frq");
prox = directory.CreateFile(segment + ".prx");
tis = new TermInfosWriter(directory, segment, fieldInfos);
TermInfo ti = new TermInfo();
System.String currentField = null;
for (int i = 0; i < postings.Length; i++)
{
Posting posting = postings[i];
// add an entry to the dictionary with pointers to prox and freq files
ti.Set(1, freq.GetFilePointer(), prox.GetFilePointer(), -1);
tis.Add(posting.term, ti);
// add an entry to the freq file
int postingFreq = posting.freq;
if (postingFreq == 1)
{
// optimize freq=1
freq.WriteVInt(1);
}
// set low bit of doc num.
else
{
freq.WriteVInt(0); // the document number
freq.WriteVInt(postingFreq); // frequency in doc
}
int lastPosition = 0; // write positions
int[] positions = posting.positions;
for (int j = 0; j < postingFreq; j++)
{
// use delta-encoding
int position = positions[j];
prox.WriteVInt(position - lastPosition);
lastPosition = position;
}
// check to see if we switched to a new Field
System.String termField = posting.term.Field();
if ((System.Object)currentField != (System.Object)termField)
{
// changing Field - see if there is something to save
currentField = termField;
FieldInfo fi = fieldInfos.FieldInfo(currentField);
if (fi.storeTermVector)
{
if (termVectorWriter == null)
{
termVectorWriter = new TermVectorsWriter(directory, segment, fieldInfos);
termVectorWriter.OpenDocument();
}
termVectorWriter.OpenField(currentField);
}
else if (termVectorWriter != null)
{
termVectorWriter.CloseField();
}
}
if (termVectorWriter != null && termVectorWriter.IsFieldOpen())
{
termVectorWriter.AddTerm(posting.term.Text(), postingFreq);
}
}
if (termVectorWriter != null)
{
termVectorWriter.CloseDocument();
}
}
finally
{
// make an effort to close all streams we can but remember and re-throw
// the first exception encountered in this process
System.IO.IOException keep = null;
if (freq != null)
{
try
{
freq.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
{
keep = e;
}
}
}
if (prox != null)
{
try
{
prox.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
{
keep = e;
}
}
}
if (tis != null)
{
try
{
tis.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
{
keep = e;
}
}
}
if (termVectorWriter != null)
{
try
{
termVectorWriter.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
{
keep = e;
}
}
}
if (keep != null)
{
throw new System.IO.IOException(keep.StackTrace);
}
}
}
/// <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
{
for (int r = 0; r < readers.Count; r++)
{
Monodoc.Lucene.Net.Index.IndexReader reader = (Monodoc.Lucene.Net.Index.IndexReader) readers[r];
int maxDoc = reader.MaxDoc();
for (int docNum = 0; docNum < maxDoc; docNum++)
{
// skip deleted docs
if (reader.IsDeleted(docNum))
{
continue;
}
termVectorsWriter.OpenDocument();
// get all term vectors
TermFreqVector[] sourceTermVector = reader.GetTermFreqVectors(docNum);
if (sourceTermVector != null)
{
for (int f = 0; f < sourceTermVector.Length; f++)
{
// translate Field numbers
TermFreqVector termVector = sourceTermVector[f];
termVectorsWriter.OpenField(termVector.GetField());
System.String[] terms = termVector.GetTerms();
int[] freqs = termVector.GetTermFrequencies();
for (int t = 0; t < terms.Length; t++)
{
termVectorsWriter.AddTerm(terms[t], freqs[t]);
}
}
termVectorsWriter.CloseDocument();
}
}
}
}
finally
{
termVectorsWriter.Close();
}
}
private void WritePostings(Posting[] postings, System.String segment)
{
OutputStream freq = null, prox = null;
TermInfosWriter tis = null;
TermVectorsWriter termVectorWriter = null;
try
{
//open files for inverse index storage
freq = directory.CreateFile(segment + ".frq");
prox = directory.CreateFile(segment + ".prx");
tis = new TermInfosWriter(directory, segment, fieldInfos);
TermInfo ti = new TermInfo();
System.String currentField = null;
for (int i = 0; i < postings.Length; i++)
{
Posting posting = postings[i];
// add an entry to the dictionary with pointers to prox and freq files
ti.Set(1, freq.GetFilePointer(), prox.GetFilePointer(), - 1);
tis.Add(posting.term, ti);
// add an entry to the freq file
int postingFreq = posting.freq;
if (postingFreq == 1)
// optimize freq=1
freq.WriteVInt(1);
// set low bit of doc num.
else
{
freq.WriteVInt(0); // the document number
freq.WriteVInt(postingFreq); // frequency in doc
}
int lastPosition = 0; // write positions
int[] positions = posting.positions;
for (int j = 0; j < postingFreq; j++)
{
// use delta-encoding
int position = positions[j];
prox.WriteVInt(position - lastPosition);
lastPosition = position;
}
// check to see if we switched to a new Field
System.String termField = posting.term.Field();
if ((System.Object) currentField != (System.Object) termField)
{
// changing Field - see if there is something to save
currentField = termField;
FieldInfo fi = fieldInfos.FieldInfo(currentField);
if (fi.storeTermVector)
{
if (termVectorWriter == null)
{
termVectorWriter = new TermVectorsWriter(directory, segment, fieldInfos);
termVectorWriter.OpenDocument();
}
termVectorWriter.OpenField(currentField);
}
else if (termVectorWriter != null)
{
termVectorWriter.CloseField();
}
}
if (termVectorWriter != null && termVectorWriter.IsFieldOpen())
{
termVectorWriter.AddTerm(posting.term.Text(), postingFreq);
}
}
if (termVectorWriter != null)
termVectorWriter.CloseDocument();
}
finally
{
// make an effort to close all streams we can but remember and re-throw
// the first exception encountered in this process
System.IO.IOException keep = null;
if (freq != null)
try
{
freq.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
keep = e;
}
if (prox != null)
try
{
prox.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
keep = e;
}
if (tis != null)
try
{
tis.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
keep = e;
}
if (termVectorWriter != null)
try
{
termVectorWriter.Close();
}
catch (System.IO.IOException e)
{
if (keep == null)
keep = e;
}
if (keep != null)
{
throw new System.IO.IOException(keep.StackTrace);
}
}
}