Enum Fingerprint 

pub enum Fingerprint {
    Rabin(u64),
    Id(u32),
    Id64(u64),
    MD5([u8; 16]),
    SHA256([u8; 32]),
}

A schema fingerprint in one of the supported formats.

This is used as the key inside SchemaStore HashMap. Each SchemaStore instance always stores only one variant, matching its configured FingerprintAlgorithm, but the enum makes the API uniform.

https://avro.apache.org/docs/1.11.1/specification/#schema-fingerprints https://docs.confluent.io/platform/current/schema-registry/fundamentals/serdes-develop/index.html#wire-format

Variants

Rabin(u64)

A 64-bit Rabin fingerprint.

Id(u32)

A 32-bit Schema Registry ID.

Id64(u64)

A 64-bit Schema Registry ID.

MD5([u8; 16])

A 128-bit MD5 fingerprint.

SHA256([u8; 32])

A 256-bit SHA-256 fingerprint.

Implementations

impl Fingerprint

pub fn load_fingerprint_id(id: u32) -> Self

Loads the 32-bit Schema Registry fingerprint (Confluent Schema Registry ID).

The provided id is in big-endian wire order; this converts it to host order and returns Fingerprint::Id.

Returns

A Fingerprint::Id variant containing the 32-bit fingerprint.

pub fn load_fingerprint_id64(id: u64) -> Self

Loads the 64-bit Schema Registry fingerprint (Apicurio Schema Registry ID).

The provided id is in big-endian wire order; this converts it to host order and returns Fingerprint::Id64.

Returns

A Fingerprint::Id64 variant containing the 64-bit fingerprint.

pub(crate) fn make_prefix(&self) -> Prefix

Constructs a serialized prefix represented as a Vec<u8> based on the variant of the enum.

This method serializes data in different formats depending on the variant of self:

• Id(id): Uses the Confluent wire format, which includes a predefined magic header (CONFLUENT_MAGIC) followed by the big-endian byte representation of the id.
• Id64(id): Uses the Apicurio wire format, which includes a predefined magic header (CONFLUENT_MAGIC) followed by the big-endian 8-byte representation of the id.
• Rabin(val): Uses the Avro single-object specification format. This includes a different magic header (SINGLE_OBJECT_MAGIC) followed by the little-endian byte representation of the val.
• MD5(bytes) (optional, md5 feature enabled): A non-standard extension that adds the SINGLE_OBJECT_MAGIC header followed by the provided bytes.
• SHA256(bytes) (optional, sha256 feature enabled): Similar to the MD5 variant, this is a non-standard extension that attaches the SINGLE_OBJECT_MAGIC header followed by the given bytes.

Returns

A Prefix containing the serialized prefix data.

Features

• You can optionally enable the md5 feature to include the MD5 variant.
• You can optionally enable the sha256 feature to include the SHA256 variant.

Trait Implementations

impl Clone for Fingerprint

fn clone(&self) -> Fingerprint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Fingerprint

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

Formats the value using the given formatter.

impl From<&Fingerprint> for FingerprintAlgorithm

Allow easy extraction of the algorithm used to create a fingerprint.

fn from(fp: &Fingerprint) -> Self

Converts to this type from the input type.

impl From<&Fingerprint> for FingerprintStrategy

fn from(f: &Fingerprint) -> Self

Converts to this type from the input type.

impl From<&FingerprintStrategy> for Fingerprint

fn from(s: &FingerprintStrategy) -> Self

Converts to this type from the input type.

impl From<Fingerprint> for FingerprintStrategy

fn from(f: Fingerprint) -> Self

Converts to this type from the input type.

impl From<FingerprintAlgorithm> for Fingerprint

fn from(s: FingerprintAlgorithm) -> Self

Converts to this type from the input type.

impl From<FingerprintStrategy> for Fingerprint

fn from(s: FingerprintStrategy) -> Self

Converts to this type from the input type.

impl Hash for Fingerprint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Fingerprint

fn eq(&self, other: &Fingerprint) -> 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 Fingerprint

impl Eq for Fingerprint

impl StructuralPartialEq for Fingerprint