Struct BufferCompression 

pub struct BufferCompression {
    pub scheme: i32,
    pub level: Option<i32>,
}

Compression applied to a single buffer of data

A buffer is the leaf of the compression tree. Unlike data blocks, which can be further compressed with a variety of techniques, a buffer cannot be understood in any particular way.

A general compression scheme may be applied to a buffer. This is something like zstd, lz4, etc. The entire buffer is compressed as a single unit. If this happens then any parent encoding becomes opaque, even if it would normally be transparent.

This is a leaf, no further compression is applied to the data.

Fields

scheme: i32

A general compression scheme to apply to the buffer

level: Option<i32>

The compression level

Optional, if not present a scheme-specific default value will be used.

Interpretation of this value depends on the compression scheme. Generally, larger values indicate more compression at the expense of more CPU time.

Implementations

impl BufferCompression

pub fn scheme(&self) -> CompressionScheme

Returns the enum value of scheme, or the default if the field is set to an invalid enum value.

pub fn set_scheme(&mut self, value: CompressionScheme)

Sets scheme to the provided enum value.

pub fn level(&self) -> i32

Returns the value of level, or the default value if level is unset.

Trait Implementations

impl Clone for BufferCompression

fn clone(&self) -> BufferCompression

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BufferCompression

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BufferCompression

fn default() -> Self

Returns the “default value” for a type.

impl Message for BufferCompression

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl Name for BufferCompression

const NAME: &'static str = "BufferCompression"

Simple name for this Message. This name is the same as it appears in the source .proto file, e.g. FooBar.

const PACKAGE: &'static str = "lance.encodings21"

Package name this message type is contained in. They are domain-like and delimited by ., e.g. google.protobuf.

fn full_name() -> String

Fully-qualified unique name for this Message. It’s prefixed with the package name and names of any parent messages, e.g. google.rpc.BadRequest.FieldViolation. By default, this is the package name followed by the message name. Fully-qualified names must be unique within a domain of Type URLs.

fn type_url() -> String

Type URL for this Message, which by default is the full name with a leading slash, but may also include a leading domain name, e.g. type.googleapis.com/google.profile.Person. This can be used when serializing into the google.protobuf.Any type.

impl PartialEq for BufferCompression

fn eq(&self, other: &BufferCompression) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BufferCompression

impl StructuralPartialEq for BufferCompression