/// <summary>Increments the enumeration to the next element. True if one exists.</summary>
public override bool Next()
{
if (position++ >= size - 1)
{
prevBuffer.Set(termBuffer);
termBuffer.Reset();
return(false);
}
prevBuffer.Set(termBuffer);
termBuffer.Read(input, fieldInfos);
termInfo.docFreq = input.ReadVInt(); // read doc freq
termInfo.freqPointer += input.ReadVLong(); // read freq pointer
termInfo.proxPointer += input.ReadVLong(); // read prox pointer
if (format == -1)
{
// just read skipOffset in order to increment file pointer;
// value is never used since skipTo is switched off
if (!isIndex)
{
if (termInfo.docFreq > formatM1SkipInterval)
{
termInfo.skipOffset = input.ReadVInt();
}
}
}
else
{
if (termInfo.docFreq >= skipInterval)
{
termInfo.skipOffset = input.ReadVInt();
}
}
if (isIndex)
{
indexPointer += input.ReadVLong(); // read index pointer
}
return(true);
}
/// <summary> Retrieve the term vector for the given document and field</summary>
/// <param name="docNum">The document number to retrieve the vector for
/// </param>
/// <param name="field">The field within the document to retrieve
/// </param>
/// <returns> The TermFreqVector for the document and field or null if there is no termVector for this field.
/// </returns>
/// <throws> IOException if there is an error reading the term vector files </throws>
public /*internal*/ virtual TermFreqVector Get(int docNum, System.String field)
{
// Check if no term vectors are available for this segment at all
int fieldNumber = fieldInfos.FieldNumber(field);
TermFreqVector result = null;
if (tvx != null)
{
//We need to account for the FORMAT_SIZE at when seeking in the tvx
//We don't need to do this in other seeks because we already have the
// file pointer
//that was written in another file
tvx.Seek((docNum * 8L) + TermVectorsWriter.FORMAT_SIZE);
//System.out.println("TVX Pointer: " + tvx.getFilePointer());
long position = tvx.ReadLong();
tvd.Seek(position);
int fieldCount = tvd.ReadVInt();
//System.out.println("Num Fields: " + fieldCount);
// There are only a few fields per document. We opt for a full scan
// rather then requiring that they be ordered. We need to read through
// all of the fields anyway to get to the tvf pointers.
int number = 0;
int found = -1;
for (int i = 0; i < fieldCount; i++)
{
if (tvdFormat == TermVectorsWriter.FORMAT_VERSION)
{
number = tvd.ReadVInt();
}
else
{
number += tvd.ReadVInt();
}
if (number == fieldNumber)
{
found = i;
}
}
// This field, although valid in the segment, was not found in this
// document
if (found != -1)
{
// Compute position in the tvf file
position = 0;
for (int i = 0; i <= found; i++)
{
position += tvd.ReadVLong();
}
result = ReadTermVector(field, position);
}
else
{
//System.out.println("Field not found");
}
}
else
{
//System.out.println("No tvx file");
}
return(result);
}
public virtual void Get(int docNum, System.String field, TermVectorMapper mapper)
{
if (tvx != null)
{
int fieldNumber = fieldInfos.FieldNumber(field);
//We need to account for the FORMAT_SIZE at when seeking in the tvx
//We don't need to do this in other seeks because we already have the
// file pointer
//that was written in another file
SeekTvx(docNum);
//System.out.println("TVX Pointer: " + tvx.getFilePointer());
long tvdPosition = tvx.ReadLong();
tvd.Seek(tvdPosition);
int fieldCount = tvd.ReadVInt();
//System.out.println("Num Fields: " + fieldCount);
// There are only a few fields per document. We opt for a full scan
// rather then requiring that they be ordered. We need to read through
// all of the fields anyway to get to the tvf pointers.
int number = 0;
int found = -1;
for (int i = 0; i < fieldCount; i++)
{
if (format >= FORMAT_VERSION)
{
number = tvd.ReadVInt();
}
else
{
number += tvd.ReadVInt();
}
if (number == fieldNumber)
{
found = i;
}
}
// This field, although valid in the segment, was not found in this
// document
if (found != -1)
{
// Compute position in the tvf file
long position;
if (format >= FORMAT_VERSION2)
{
position = tvx.ReadLong();
}
else
{
position = tvd.ReadVLong();
}
for (int i = 1; i <= found; i++)
{
position += tvd.ReadVLong();
}
mapper.SetDocumentNumber(docNum);
ReadTermVector(field, position, mapper);
}
else
{
//System.out.println("Fieldable not found");
}
}
else
{
//System.out.println("No tvx file");
}
}
internal readonly PackedInts.Reader[] StartPointersDeltas; // delta from the avg
#endregion Fields
#region Constructors
// It is the responsibility of the caller to close fieldsIndexIn after this constructor
// has been called
internal CompressingStoredFieldsIndexReader(IndexInput fieldsIndexIn, SegmentInfo si)
{
MaxDoc = si.DocCount;
int[] docBases = new int[16];
long[] startPointers = new long[16];
int[] avgChunkDocs = new int[16];
long[] avgChunkSizes = new long[16];
PackedInts.Reader[] docBasesDeltas = new PackedInts.Reader[16];
PackedInts.Reader[] startPointersDeltas = new PackedInts.Reader[16];
int packedIntsVersion = fieldsIndexIn.ReadVInt();
int blockCount = 0;
for (; ; )
{
int numChunks = fieldsIndexIn.ReadVInt();
if (numChunks == 0)
{
break;
}
if (blockCount == docBases.Length)
{
int newSize = ArrayUtil.Oversize(blockCount + 1, 8);
docBases = Arrays.CopyOf(docBases, newSize);
startPointers = Arrays.CopyOf(startPointers, newSize);
avgChunkDocs = Arrays.CopyOf(avgChunkDocs, newSize);
avgChunkSizes = Arrays.CopyOf(avgChunkSizes, newSize);
docBasesDeltas = Arrays.CopyOf(docBasesDeltas, newSize);
startPointersDeltas = Arrays.CopyOf(startPointersDeltas, newSize);
}
// doc bases
docBases[blockCount] = fieldsIndexIn.ReadVInt();
avgChunkDocs[blockCount] = fieldsIndexIn.ReadVInt();
int bitsPerDocBase = fieldsIndexIn.ReadVInt();
if (bitsPerDocBase > 32)
{
throw new CorruptIndexException("Corrupted bitsPerDocBase (resource=" + fieldsIndexIn + ")");
}
docBasesDeltas[blockCount] = PackedInts.GetReaderNoHeader(fieldsIndexIn, PackedInts.Format.PACKED, packedIntsVersion, numChunks, bitsPerDocBase);
// start pointers
startPointers[blockCount] = fieldsIndexIn.ReadVLong();
avgChunkSizes[blockCount] = fieldsIndexIn.ReadVLong();
int bitsPerStartPointer = fieldsIndexIn.ReadVInt();
if (bitsPerStartPointer > 64)
{
throw new CorruptIndexException("Corrupted bitsPerStartPointer (resource=" + fieldsIndexIn + ")");
}
startPointersDeltas[blockCount] = PackedInts.GetReaderNoHeader(fieldsIndexIn, PackedInts.Format.PACKED, packedIntsVersion, numChunks, bitsPerStartPointer);
++blockCount;
}
this.DocBases = Arrays.CopyOf(docBases, blockCount);
this.StartPointers = Arrays.CopyOf(startPointers, blockCount);
this.AvgChunkDocs = Arrays.CopyOf(avgChunkDocs, blockCount);
this.AvgChunkSizes = Arrays.CopyOf(avgChunkSizes, blockCount);
this.DocBasesDeltas = Arrays.CopyOf(docBasesDeltas, blockCount);
this.StartPointersDeltas = Arrays.CopyOf(startPointersDeltas, blockCount);
}
internal static NumericEntry ReadNumericEntry(IndexInput meta)
{
NumericEntry entry = new NumericEntry();
entry.Format = meta.ReadVInt();
entry.MissingOffset = meta.ReadLong();
entry.PackedIntsVersion = meta.ReadVInt();
entry.Offset = meta.ReadLong();
entry.Count = meta.ReadVLong();
entry.BlockSize = meta.ReadVInt();
switch (entry.Format)
{
case Lucene45DocValuesConsumer.GCD_COMPRESSED:
entry.MinValue = meta.ReadLong();
entry.Gcd = meta.ReadLong();
break;
case Lucene45DocValuesConsumer.TABLE_COMPRESSED:
if (entry.Count > int.MaxValue)
{
throw new Exception("Cannot use TABLE_COMPRESSED with more than MAX_VALUE values, input=" + meta);
}
int uniqueValues = meta.ReadVInt();
if (uniqueValues > 256)
{
throw new Exception("TABLE_COMPRESSED cannot have more than 256 distinct values, input=" + meta);
}
entry.Table = new long[uniqueValues];
for (int i = 0; i < uniqueValues; ++i)
{
entry.Table[i] = meta.ReadLong();
}
break;
case Lucene45DocValuesConsumer.DELTA_COMPRESSED:
break;
default:
throw new Exception("Unknown format: " + entry.Format + ", input=" + meta);
}
return entry;
}
internal static BinaryEntry ReadBinaryEntry(IndexInput meta)
{
BinaryEntry entry = new BinaryEntry();
entry.Format = meta.ReadVInt();
entry.MissingOffset = meta.ReadLong();
entry.MinLength = meta.ReadVInt();
entry.MaxLength = meta.ReadVInt();
entry.Count = meta.ReadVLong();
entry.Offset = meta.ReadLong();
switch (entry.Format)
{
case Lucene45DocValuesConsumer.BINARY_FIXED_UNCOMPRESSED:
break;
case Lucene45DocValuesConsumer.BINARY_PREFIX_COMPRESSED:
entry.AddressInterval = meta.ReadVInt();
entry.AddressesOffset = meta.ReadLong();
entry.PackedIntsVersion = meta.ReadVInt();
entry.BlockSize = meta.ReadVInt();
break;
case Lucene45DocValuesConsumer.BINARY_VARIABLE_UNCOMPRESSED:
entry.AddressesOffset = meta.ReadLong();
entry.PackedIntsVersion = meta.ReadVInt();
entry.BlockSize = meta.ReadVInt();
break;
default:
throw new Exception("Unknown format: " + entry.Format + ", input=" + meta);
}
return entry;
}
