Lucene40SegmentInfoFormat (Lucene 4.7.0 API)

java.lang.Object
- org.apache.lucene.codecs.SegmentInfoFormat
- - org.apache.lucene.codecs.lucene40.Lucene40SegmentInfoFormat

Deprecated.
Only for reading old 4.0-4.5 segments, and supporting IndexWriter.addIndexes
```
@Deprecated
public class Lucene40SegmentInfoFormat
extends SegmentInfoFormat
```
Lucene 4.0 Segment info format.
Files:
- .si: Header, SegVersion, SegSize, IsCompoundFile, Diagnostics, Attributes, Files
Data types:
- Header --> CodecHeader
- SegSize --> Int32
- SegVersion --> String
- Files --> Set<String>
- Diagnostics, Attributes --> Map<String,String>
- IsCompoundFile --> Int8
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, 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.
See Also:
SegmentInfos
WARNING: This API is experimental and might change in incompatible ways in the next release.

Fields
Modifier and Type	Field and Description
`static String`	`SI_EXTENSION` Deprecated. File extension used to store `SegmentInfo`.

Constructors
Constructor and Description
`Lucene40SegmentInfoFormat()` Deprecated. Sole constructor.

Methods
Modifier and Type	Method and Description
`SegmentInfoReader`	`getSegmentInfoReader()` Deprecated. Returns the `SegmentInfoReader` for reading `SegmentInfo` instances.
`SegmentInfoWriter`	`getSegmentInfoWriter()` Deprecated. Returns the `SegmentInfoWriter` for writing `SegmentInfo` instances.

Class Lucene40SegmentInfoFormat