Struct Metadata 

pub struct Metadata { /* private fields */ }

Advanced metadata container with rich functionality

Implementations

impl Metadata

pub fn new() -> Self

Create a new empty metadata container

pub fn with_schema(version: &str) -> Self

Create metadata with a specific schema version

pub fn set(&mut self, key: impl Into<String>, value: impl Into<MetadataValue>)

Set a metadata value

pub fn get(&self, key: &str) -> Option<&MetadataValue>

Get a metadata value

pub fn get_string(&self, key: &str) -> Option<&str>

Get a typed metadata value

pub fn get_integer(&self, key: &str) -> Option<i64>

Get integer metadata value

pub fn get_float(&self, key: &str) -> Option<f64>

Get float metadata value

pub fn set_extension( &mut self, format: &str, key: impl Into<String>, value: impl Into<MetadataValue>, )

Set format-specific extension metadata

pub fn get_extension( &self, format: &str, ) -> Option<&IndexMap<String, MetadataValue>>

Get format-specific extension metadata

pub fn merge(&mut self, other: &Metadata)

Merge metadata from another container

pub fn validate(&self, schema: &MetadataSchema) -> Result<()>

Validate metadata against a schema

pub fn to_format(&self, format: MetadataFormat) -> Result<String>

Convert metadata to a specific format

pub fn from_file(path: impl AsRef<Path>) -> Result<Self>

Load metadata from a file

pub fn to_file(&self, path: impl AsRef<Path>) -> Result<()>

Save metadata to a file

pub fn add_processing_history( &mut self, entry: ProcessingHistoryEntry, ) -> Result<()>

Add processing history entry

pub fn update_modification_date(&mut self)

Update modification timestamp

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.

impl Default for Metadata

fn default() -> Metadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Metadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Metadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.