org.apache.lucene.codecs

Class PointsFormat

java.lang.Object

org.apache.lucene.codecs.PointsFormat

Direct Known Subclasses:

AssertingPointsFormat, Lucene60PointsFormat, SimpleTextPointsFormat

public abstract class PointsFormat
extends java.lang.Object

Encodes/decodes indexed points.

Field Summary

Fields

Modifier and Type	Field and Description
static PointsFormat	EMPTY A PointsFormat that has nothing indexed

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PointsFormat() Creates a new point format.

Method Summary

Modifier and Type	Method and Description
abstract PointsReader	fieldsReader(SegmentReadState state) Reads a segment.
abstract PointsWriter	fieldsWriter(SegmentWriteState state) Writes a new segment

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final PointsFormat EMPTY

A PointsFormat that has nothing indexed

Constructor Detail

PointsFormat

protected PointsFormat()

Creates a new point format.

Method Detail

fieldsWriter

public abstract PointsWriter fieldsWriter(SegmentWriteState state)
                                   throws java.io.IOException

Writes a new segment

Throws:

java.io.IOException

fieldsReader

public abstract PointsReader fieldsReader(SegmentReadState state)
                                   throws java.io.IOException

Reads a segment. NOTE: by the time this call returns, it must hold open any files it will need to use; else, those files may be deleted. Additionally, required files may be deleted during the execution of this call before there is a chance to open them. Under these circumstances an IOException should be thrown by the implementation. IOExceptions are expected and will automatically cause a retry of the segment opening logic with the newly revised segments.

Throws:

java.io.IOException