Package org.apache.lucene.index

# Enum Class VectorEncoding

java.lang.Object
java.lang.Enum<VectorEncoding>
org.apache.lucene.index.VectorEncoding

All Implemented Interfaces:
  `Serializable`, `Comparable<VectorEncoding>`, `Constable`

public enum VectorEncoding extends Enum<VectorEncoding>
The numeric datatype of the vector values.

- ## Nested Class Summary

  ## Nested classes/interfaces inherited from class java.lang.Enum

  `Enum.EnumDesc<E extends Enum<E>>`

- ## Enum Constant Summary

  Enum Constants
  Enum Constant
  Description
  `BYTE`
  Encodes vector using 8 bits of precision per sample.
  `FLOAT32`
  Encodes vector using 32 bits of precision per sample in IEEE floating point format.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `final int`
  `byteSize`
  The number of bytes required to encode a scalar in this format.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static VectorEncoding`
  `valueOf(String name)`
  Returns the enum constant of this class with the specified name.
  `static VectorEncoding[]`
  `values()`
  Returns an array containing the constants of this enum class, in the order they are declared.

  ### Methods inherited from class java.lang.Enum

  `clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

  ### Methods inherited from class java.lang.Object

  `getClass, notify, notifyAll, wait, wait, wait`

- ## Enum Constant Details

  - ### BYTE

    public static final VectorEncoding BYTE
    Encodes vector using 8 bits of precision per sample. Values provided with higher precision (eg: queries provided as float) *must* be in the range [-128, 127]. NOTE: this can enable significant storage savings and faster searches, at the cost of some possible loss of precision.

  - ### FLOAT32

    public static final VectorEncoding FLOAT32
    Encodes vector using 32 bits of precision per sample in IEEE floating point format.

- ## Field Details

  - ### byteSize

    public final int byteSize
    The number of bytes required to encode a scalar in this format. A vector will nominally require dimension * byteSize bytes of storage.

- ## Method Details

  - ### values

    public static VectorEncoding[] values()
    Returns an array containing the constants of this enum class, in the order they are declared.
    Returns:
      an array containing the constants of this enum class, in the order they are declared

  - ### valueOf

    public static VectorEncoding valueOf(String name)
    Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
    Parameters:
      `name` - the name of the enum constant to be returned.
    Returns:
      the enum constant with the specified name
    Throws:
      `IllegalArgumentException` - if this enum class has no constant with the specified name
      `NullPointerException` - if the argument is null