Package org.apache.lucene.util.hnsw

Interface RandomAccessVectorValues

All Known Subinterfaces:

RandomAccessQuantizedByteVectorValues, RandomAccessVectorValues.Bytes, RandomAccessVectorValues.Floats

All Known Implementing Classes:

OffHeapByteVectorValues, OffHeapByteVectorValues.DenseOffHeapVectorValues, OffHeapFloatVectorValues, OffHeapFloatVectorValues.DenseOffHeapVectorValues, OffHeapQuantizedByteVectorValues, OffHeapQuantizedByteVectorValues.DenseOffHeapVectorValues

public interface RandomAccessVectorValues

Provides random access to vectors by dense ordinal. This interface is used by HNSW-based implementations of KNN search.

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

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	RandomAccessVectorValues.Bytes	Byte vector values.
static interface	RandomAccessVectorValues.Floats	Float vector values.

Method Summary

Modifier and Type	Method	Description
RandomAccessVectorValues	copy()	Creates a new copy of this RandomAccessVectorValues.
int	dimension()	Return the dimension of the returned vector values
static RandomAccessVectorValues.Bytes	fromBytes(List<byte[]> vectors, int dim)	Creates a RandomAccessVectorValues.Bytes from a list of byte arrays.
static RandomAccessVectorValues.Floats	fromFloats(List<float[]> vectors, int dim)	Creates a RandomAccessVectorValues.Floats from a list of float arrays.
default Bits	getAcceptOrds(Bits acceptDocs)	Returns the Bits representing live documents.
default IndexInput	getSlice()	Returns a slice of the underlying IndexInput that contains the vector values if available
int	getVectorByteLength()	Returns the byte length of the vector values.
default int	ordToDoc(int ord)	Translates vector ordinal to the correct document ID.
int	size()	Return the number of vector values

Method Details

size

int size()

Return the number of vector values

dimension

int dimension()

Return the dimension of the returned vector values

copy

RandomAccessVectorValues copy()
                       throws IOException

Creates a new copy of this RandomAccessVectorValues. This is helpful when you need to access different values at once, to avoid overwriting the underlying vector returned.

Throws:

IOException

getSlice

default IndexInput getSlice()

Returns a slice of the underlying IndexInput that contains the vector values if available

getVectorByteLength

int getVectorByteLength()

Returns the byte length of the vector values.

ordToDoc

default int ordToDoc(int ord)

Translates vector ordinal to the correct document ID. By default, this is an identity function.

Parameters:

ord - the vector ordinal

Returns:

the document Id for that vector ordinal

getAcceptOrds

default Bits getAcceptOrds(Bits acceptDocs)

Returns the Bits representing live documents. By default, this is an identity function.

Parameters:

acceptDocs - the accept docs

Returns:

the accept docs

fromFloats

static RandomAccessVectorValues.Floats fromFloats(List<float[]> vectors,
 int dim)

Creates a RandomAccessVectorValues.Floats from a list of float arrays.

Parameters:

vectors - the list of float arrays

dim - the dimension of the vectors

Returns:

a RandomAccessVectorValues.Floats instance

fromBytes

static RandomAccessVectorValues.Bytes fromBytes(List<byte[]> vectors,
 int dim)

Creates a RandomAccessVectorValues.Bytes from a list of byte arrays.

Parameters:

vectors - the list of byte arrays

dim - the dimension of the vectors

Returns:

a RandomAccessVectorValues.Bytes instance