Package org.apache.lucene.codecs.lucene99

Class Lucene99ScalarQuantizedVectorsWriter

java.lang.Object

org.apache.lucene.codecs.FlatVectorsWriter

org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter

All Implemented Interfaces:

Closeable, AutoCloseable, Accountable

public final class Lucene99ScalarQuantizedVectorsWriter
extends FlatVectorsWriter

Writes quantized vector values and metadata to index segments.

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

Field Summary

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
Lucene99ScalarQuantizedVectorsWriter(SegmentWriteState state, Float confidenceInterval, FlatVectorsWriter rawVectorDelegate)

Method Summary

Modifier and Type	Method	Description
FlatFieldVectorsWriter<?>	addField(FieldInfo fieldInfo, KnnFieldVectorsWriter<?> indexWriter)	Add a new field for indexing, allowing the user to provide a writer that the flat vectors writer can delegate to if additional indexing logic is required.
void	close()
void	finish()	Called once at the end before close
void	flush(int maxDoc, Sorter.DocMap sortMap)	Flush all buffered data on disk *
static ScalarQuantizer	mergeAndRecalculateQuantiles(MergeState mergeState, FieldInfo fieldInfo, float confidenceInterval)	Merges the quantiles of the segments and recalculates the quantiles if necessary.
void	mergeOneField(FieldInfo fieldInfo, MergeState mergeState)	Write field for merging
CloseableRandomVectorScorerSupplier	mergeOneFieldToIndex(FieldInfo fieldInfo, MergeState mergeState)	Write the field for merging, providing a scorer over the newly merged flat vectors.
long	ramBytesUsed()	Return the memory usage of this object in bytes.
static DocsWithFieldSet	writeQuantizedVectorData(IndexOutput output, QuantizedByteVectorValues quantizedByteVectorValues)	Writes the vector values to the output and returns a set of documents that contains vectors.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Constructor Detail

Lucene99ScalarQuantizedVectorsWriter

public Lucene99ScalarQuantizedVectorsWriter(SegmentWriteState state,
                                            Float confidenceInterval,
                                            FlatVectorsWriter rawVectorDelegate)
                                     throws IOException

Throws:

IOException

Method Detail

addField

public FlatFieldVectorsWriter<?> addField(FieldInfo fieldInfo,
                                          KnnFieldVectorsWriter<?> indexWriter)
                                   throws IOException

Description copied from class: FlatVectorsWriter

Add a new field for indexing, allowing the user to provide a writer that the flat vectors writer can delegate to if additional indexing logic is required.

Specified by:

addField in class FlatVectorsWriter

Parameters:

fieldInfo - fieldInfo of the field to add

indexWriter - the writer to delegate to, can be null

Returns:

a writer for the field

Throws:

IOException - if an I/O error occurs when adding the field

mergeOneField

public void mergeOneField(FieldInfo fieldInfo,
                          MergeState mergeState)
                   throws IOException

Description copied from class: FlatVectorsWriter

Write field for merging

Overrides:

mergeOneField in class FlatVectorsWriter

Throws:

IOException

mergeOneFieldToIndex

public CloseableRandomVectorScorerSupplier mergeOneFieldToIndex(FieldInfo fieldInfo,
                                                                MergeState mergeState)
                                                         throws IOException

Description copied from class: FlatVectorsWriter

Write the field for merging, providing a scorer over the newly merged flat vectors. This way any additional merging logic can be implemented by the user of this class.

Specified by:

mergeOneFieldToIndex in class FlatVectorsWriter

Parameters:

fieldInfo - fieldInfo of the field to merge

mergeState - mergeState of the segments to merge

Returns:

a scorer over the newly merged flat vectors, which should be closed as it holds a temporary file handle to read over the newly merged vectors

Throws:

IOException - if an I/O error occurs when merging

flush

public void flush(int maxDoc,
                  Sorter.DocMap sortMap)
           throws IOException

Description copied from class: FlatVectorsWriter

Flush all buffered data on disk *

Specified by:

flush in class FlatVectorsWriter

Throws:

IOException

finish

public void finish()
            throws IOException

Description copied from class: FlatVectorsWriter

Called once at the end before close

Specified by:

finish in class FlatVectorsWriter

Throws:

IOException

ramBytesUsed

public long ramBytesUsed()

Description copied from interface: Accountable

Return the memory usage of this object in bytes. Negative values are illegal.

mergeAndRecalculateQuantiles

public static ScalarQuantizer mergeAndRecalculateQuantiles(MergeState mergeState,
                                                           FieldInfo fieldInfo,
                                                           float confidenceInterval)
                                                    throws IOException

Merges the quantiles of the segments and recalculates the quantiles if necessary.

Parameters:

mergeState - The merge state

fieldInfo - The field info

confidenceInterval - The confidence interval

Returns:

The merged quantiles

Throws:

IOException - If there is a low-level I/O error

writeQuantizedVectorData

public static DocsWithFieldSet writeQuantizedVectorData(IndexOutput output,
                                                        QuantizedByteVectorValues quantizedByteVectorValues)
                                                 throws IOException

Writes the vector values to the output and returns a set of documents that contains vectors.

Throws:

IOException

close

public void close()
           throws IOException

Throws:

IOException