Struct Extensions

pub struct Extensions(/* private fields */);

Extensions are available as part of Activity Definitions, as part of a Statement’s context or result properties. In each case, they’re intended to provide a natural way to extend those properties for some specialized use.

The contents of these Extensions might be something valuable to just one application, or it might be a convention used by an entire Community of Practice.

From 4.2.7 Additional Requirements for Data Types / Extension:

• The LRS shall reject any Statement where a key of an extensions map is not an IRI.
• An LRS shall not reject a Statement based on the values of the extensions map.

Implementations

impl Extensions

pub fn new() -> Self

Construct an empty instance.

pub fn is_empty(&self) -> bool

Whether this is an empty collection (TRUE) or not (FALSE).

pub fn get(&self, key: &IriStr) -> Option<&Value>

Return the Value associated w/ the given key if present in this collection; None otherwise.

pub fn len(&self) -> usize

Return the number of entries in the collection.

pub fn contains_key(&self, key: &IriStr) -> bool

Returns TRUE if the collection contains a value for the given key. Return FALSE otherwise.

pub fn add(&mut self, key_str: &str, v: &Value) -> Result<(), DataError>

Add a key-value pair to this collection.

pub fn append(&mut self, other: &mut Extensions)

Moves all elements from other into self, leaving other empty.

If a key from other is already present in self, the respective value from self will be overwritten with the respective value from other.

Trait Implementations

impl Clone for Extensions

fn clone(&self) -> Extensions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Extensions

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

Formats the value using the given formatter.

impl Default for Extensions

fn default() -> Extensions

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Extensions

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Extensions

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

Formats the value using the given formatter.

impl Fingerprint for Extensions

fn fingerprint<H: Hasher>(&self, state: &mut H)

Feed this value into the given Hasher.

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

where Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Extensions

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

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

const 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 Serialize for Extensions

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Extensions