Class Lucene40LiveDocsFormat
Lucene 4.0 Live Documents Format.
The .del file is optional, and only exists when a segment contains deletions.
Although per-segment, this file is maintained exterior to compound segment files.
Deletions (.del) --> Format,Header,ByteCount,BitCount, Bits | DGaps (depending on Format)
- Format,ByteSize,BitCount --> Uint32 (WriteInt32(Int32))
- Bits --> < Byte (WriteByte(Byte)) > ByteCount
- DGaps --> <DGap,NonOnesByte> NonzeroBytesCount
- DGap --> VInt (WriteVInt32(Int32))
- NonOnesByte --> Byte(WriteByte(Byte))
- Header --> CodecHeader (WriteHeader(DataOutput, String, Int32))
Format is 1: indicates cleared DGaps.
ByteCount indicates the number of bytes in Bits. It is typically (SegSize/8)+1.
BitCount indicates the number of bits that are currently set in Bits.
Bits contains one bit for each document indexed. When the bit corresponding to a document number is cleared, that document is marked as deleted. Bit ordering is from least to most significant. Thus, if Bits contains two bytes, 0x00 and 0x02, then document 9 is marked as alive (not deleted).
DGaps represents sparse bit-vectors more efficiently than Bits. It is made of DGaps on indexes of nonOnes bytes in Bits, and the nonOnes bytes themselves. The number of nonOnes bytes in Bits (NonOnesBytesCount) is not stored.
For example, if there are 8000 bits and only bits 10,12,32 are cleared, DGaps would be used:
(VInt) 1 , (byte) 20 , (VInt) 3 , (Byte) 1
Namespace: Lucene.Net.Codecs.Lucene40
Assembly: Lucene.Net.dll
Syntax
public class Lucene40LiveDocsFormat : LiveDocsFormatConstructors
| Improve this Doc View SourceLucene40LiveDocsFormat()
Sole constructor.
Declaration
public Lucene40LiveDocsFormat()Methods
| Improve this Doc View SourceFiles(SegmentCommitInfo, ICollection<String>)
Declaration
public override void Files(SegmentCommitInfo info, ICollection<string> files)Parameters
| Type | Name | Description |
|---|---|---|
| SegmentCommitInfo | info | |
| ICollection<System.String> | files |
Overrides
| Improve this Doc View SourceNewLiveDocs(IBits)
Declaration
public override IMutableBits NewLiveDocs(IBits existing)Parameters
| Type | Name | Description |
|---|---|---|
| IBits | existing |
Returns
| Type | Description |
|---|---|
| IMutableBits |
Overrides
| Improve this Doc View SourceNewLiveDocs(Int32)
Declaration
public override IMutableBits NewLiveDocs(int size)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | size |
Returns
| Type | Description |
|---|---|
| IMutableBits |
Overrides
| Improve this Doc View SourceReadLiveDocs(Directory, SegmentCommitInfo, IOContext)
Declaration
public override IBits ReadLiveDocs(Directory dir, SegmentCommitInfo info, IOContext context)Parameters
| Type | Name | Description |
|---|---|---|
| Directory | dir | |
| SegmentCommitInfo | info | |
| IOContext | context |
Returns
| Type | Description |
|---|---|
| IBits |
Overrides
| Improve this Doc View SourceWriteLiveDocs(IMutableBits, Directory, SegmentCommitInfo, Int32, IOContext)
Declaration
public override void WriteLiveDocs(IMutableBits bits, Directory dir, SegmentCommitInfo info, int newDelCount, IOContext context)Parameters
| Type | Name | Description |
|---|---|---|
| IMutableBits | bits | |
| Directory | dir | |
| SegmentCommitInfo | info | |
| System.Int32 | newDelCount | |
| IOContext | context |