Struct Entity 

pub struct Entity {
    pub id: EntityId,
    pub label: String,
    pub properties: HashMap<String, Value>,
}

A node in the knowledge graph.

Fields

id: EntityId

Unique identifier.

label: String

Human-readable label (e.g. “Person”, “Concept”).

properties: HashMap<String, Value>

Arbitrary key-value properties.

Implementations

impl Entity

pub fn new(id: impl Into<String>, label: impl Into<String>) -> Self

Construct a new entity with no properties.

pub fn with_properties( id: impl Into<String>, label: impl Into<String>, properties: HashMap<String, Value>, ) -> Self

Construct a new entity with the given properties.

pub fn with_property(self, key: impl Into<String>, value: Value) -> Self

Add a single key-value property, consuming and returning self.

Allows fluent builder-style construction:

let e = Entity::new("alice", "Person")
    .with_property("age", 30.into())
    .with_property("role", "engineer".into());

pub fn has_property(&self, key: &str) -> bool

Return true if the entity has a property with the given key.

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

Return a reference to the property value for key, or None if absent.

pub fn remove_property(&mut self, key: &str) -> Option<Value>

Remove the property with the given key, returning its previous value.

Returns None if the key was not present. Allows incremental property pruning without needing to reconstruct the entire entity.

pub fn property_count(&self) -> usize

Return the number of properties stored on this entity.

pub fn properties_is_empty(&self) -> bool

Return true if this entity has no properties.

pub fn property_keys(&self) -> Vec<&str>

Return a sorted list of property keys for this entity.

Useful for inspecting an entity’s schema without cloning all values.

Trait Implementations

impl Clone for Entity

fn clone(&self) -> Entity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Entity

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Entity

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Entity

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

Render as "Entity[id='...', label='...', props=n]".

impl Serialize for Entity

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

where __S: Serializer,

Serialize this value into the given Serde serializer.