Trait c2pa::AssertionBase

pub trait AssertionBase
where
    Self: Sized,
{
    const LABEL: &'static str = "unknown";
    const VERSION: Option<usize> = None;

    // Required methods
    fn to_assertion(&self) -> Result<Assertion>;
    fn from_assertion(assertion: &Assertion) -> Result<Self>;

    // Provided methods
    fn label(&self) -> &str { ... }
    fn version(&self) -> Option<usize> { ... }
}

The core required trait for all assertions.

This defines the label and version for the assertion and supplies the to/from converters for C2PA assertion format.

Provided Associated Constants

const LABEL: &'static str = "unknown"

const VERSION: Option<usize> = None

Required Methods

fn to_assertion(&self) -> Result<Assertion>

Returns an Assertion upon success or Error otherwise.

fn from_assertion(assertion: &Assertion) -> Result<Self>

Returns Self or AssertionDecode Result from an assertion

Provided Methods

fn label(&self) -> &str

Returns a label for this assertion.

fn version(&self) -> Option<usize>

Returns a version for this assertion.

Object Safety

This trait is not object safe.

Implementors

impl AssertionBase for Actions

const LABEL: &'static str = labels::ACTIONS

const VERSION: Option<usize> = _

impl AssertionBase for BmffHash

const LABEL: &'static str = Self::LABEL

const VERSION: Option<usize> = _

impl AssertionBase for BoxHash

const LABEL: &'static str = Self::LABEL

const VERSION: Option<usize> = _

impl AssertionBase for CreativeWork

const LABEL: &'static str = Self::LABEL

const VERSION: Option<usize> = _

impl AssertionBase for DataHash

const LABEL: &'static str = Self::LABEL

const VERSION: Option<usize> = _

impl AssertionBase for Exif

const LABEL: &'static str = labels::EXIF

impl AssertionBase for Metadata

const LABEL: &'static str = Self::LABEL

const VERSION: Option<usize> = _

impl AssertionBase for SchemaDotOrg

const LABEL: &'static str = labels::SCHEMA_ORG

const VERSION: Option<usize> = _