org.apache.lucene.codecs.lucene42

Class Lucene42DocValuesFormat

java.lang.Object

org.apache.lucene.codecs.DocValuesFormat

org.apache.lucene.codecs.lucene42.Lucene42DocValuesFormat

All Implemented Interfaces:

NamedSPILoader.NamedSPI

Deprecated.

Only for reading old 4.2 segments

@Deprecated
public class Lucene42DocValuesFormat
extends DocValuesFormat

Lucene 4.2 DocValues format.

Constructor Summary

Constructors

Constructor and Description
Lucene42DocValuesFormat() Deprecated. Calls Lucene42DocValuesFormat(PackedInts.DEFAULT)
Lucene42DocValuesFormat(float acceptableOverheadRatio) Deprecated. Creates a new Lucene42DocValuesFormat with the specified acceptableOverheadRatio for NumericDocValues.

Method Summary

Modifier and Type	Method and Description
DocValuesConsumer	fieldsConsumer(SegmentWriteState state) Deprecated. Returns a DocValuesConsumer to write docvalues to the index.
DocValuesProducer	fieldsProducer(SegmentReadState state) Deprecated. Returns a DocValuesProducer to read docvalues from the index.

Methods inherited from class org.apache.lucene.codecs.DocValuesFormat

availableDocValuesFormats, forName, getName, reloadDocValuesFormats, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Lucene42DocValuesFormat

public Lucene42DocValuesFormat()

Deprecated.

Calls Lucene42DocValuesFormat(PackedInts.DEFAULT)

Lucene42DocValuesFormat

public Lucene42DocValuesFormat(float acceptableOverheadRatio)

Deprecated.

Creates a new Lucene42DocValuesFormat with the specified acceptableOverheadRatio for NumericDocValues.

Parameters:

acceptableOverheadRatio - compression parameter for numerics. Currently this is only used when the number of unique values is small.

Method Detail

fieldsConsumer

public DocValuesConsumer fieldsConsumer(SegmentWriteState state)
                                 throws IOException

Deprecated.

Description copied from class: DocValuesFormat

Returns a DocValuesConsumer to write docvalues to the index.

Specified by:

fieldsConsumer in class DocValuesFormat

Throws:

IOException

fieldsProducer

public final DocValuesProducer fieldsProducer(SegmentReadState state)
                                       throws IOException

Deprecated.

Description copied from class: DocValuesFormat

Returns a DocValuesProducer to read docvalues from the index.

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.

Specified by:

fieldsProducer in class DocValuesFormat

Throws:

IOException