Class Lucene40SegmentInfoFormat

Lucene 4.0 Segment info format.

Files:

  • .si: Header, SegVersion, SegSize, IsCompoundFile, Diagnostics, Attributes, Files

Data types:

Field Descriptions:

  • SegVersion is the code version that created the segment.
  • SegSize is the number of documents contained in the segment index.
  • IsCompoundFile records whether the segment is written as a compound file or not. If this is -1, the segment is not a compound file. If it is 1, the segment is a compound file.
  • Checksum contains the CRC32 checksum of all bytes in the segments_N file up until the checksum. This is used to verify integrity of the file on opening the index.
  • The Diagnostics Map is privately written by IndexWriter, as a debugging aid, for each segment it creates. It includes metadata like the current Lucene version, OS, .NET/Java version, why the segment was created (merge, flush, addIndexes), etc.
  • Attributes: a key-value map of codec-private attributes.
  • Files is a list of files referred to by this segment.

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
System.Object
SegmentInfoFormat
Lucene40SegmentInfoFormat
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Codecs.Lucene40
Assembly: Lucene.Net.dll
Syntax
[Obsolete("Only for reading old 4.0-4.5 segments, and supporting IndexWriter.AddIndexes()")]
public class Lucene40SegmentInfoFormat : SegmentInfoFormat

Constructors

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Lucene40SegmentInfoFormat()

Sole constructor.

Declaration
public Lucene40SegmentInfoFormat()

Fields

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SI_EXTENSION

File extension used to store SegmentInfo.

Declaration
public const string SI_EXTENSION = "si"
Field Value
Type Description
System.String

Properties

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SegmentInfoReader

Declaration
public override SegmentInfoReader SegmentInfoReader { get; }
Property Value
Type Description
SegmentInfoReader
Overrides
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SegmentInfoWriter

Declaration
public override SegmentInfoWriter SegmentInfoWriter { get; }
Property Value
Type Description
SegmentInfoWriter
Overrides

See Also