Package org.apache.lucene.codecs

Class SegmentInfoFormat

java.lang.Object

org.apache.lucene.codecs.SegmentInfoFormat

Direct Known Subclasses:

Lucene99SegmentInfoFormat

public abstract class SegmentInfoFormat
extends Object

Expert: Controls the format of the SegmentInfo (segment metadata file).

See Also:

• SegmentInfo

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

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SegmentInfoFormat()	Sole constructor.

Method Summary

Modifier and Type	Method	Description
abstract SegmentInfo	read(Directory directory, String segmentName, byte[] segmentID, IOContext context)	Read SegmentInfo data from a directory.
abstract void	write(Directory dir, SegmentInfo info, IOContext ioContext)	Write SegmentInfo data.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SegmentInfoFormat

protected SegmentInfoFormat()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Details

read

public abstract SegmentInfo read(Directory directory,
 String segmentName,
 byte[] segmentID,
 IOContext context)
                          throws IOException

Read SegmentInfo data from a directory.

Parameters:

directory - directory to read from

segmentName - name of the segment to read

segmentID - expected identifier for the segment

Returns:

infos instance to be populated with data

Throws:

IOException - If an I/O error occurs

write

public abstract void write(Directory dir,
 SegmentInfo info,
 IOContext ioContext)
                    throws IOException

Write SegmentInfo data. The codec must add its SegmentInfo filename(s) to info before doing i/o.

Throws:

IOException - If an I/O error occurs