Struct DataModel 

pub struct DataModel { /* private fields */ }

A reactive JSON document store with JSON Pointer support.

The data model is always a JSON object at the root. Subscribers are notified when values change at specific paths.

Implementations

impl DataModel

pub fn new() -> Self

Create an empty data model (root is {}).

pub fn from_value(value: Value) -> Self

Create from an existing JSON value. If the value is not an object, wraps it.

pub fn as_value(&self) -> &Value

Get a reference to the root data.

pub fn get(&self, pointer: &str) -> Option<&Value>

Get a value at an absolute JSON Pointer path. Returns None if the path doesn’t exist.

pub fn set(&mut self, pointer: &str, value: Value)

Set a value at a JSON Pointer path with auto-vivification.

• Creates intermediate objects/arrays as needed.
• Setting Value::Null removes the key.
• Notifies subscribers with bubble & cascade strategy.

pub fn replace_all(&mut self, value: Value)

Replace the entire data model.

pub fn subscribe<F>(&self, callback: F) -> EventSubscription

where F: Fn(&DataModelEvent) + Send + Sync + 'static,

Subscribe to data changes.

Trait Implementations

impl Default for DataModel

fn default() -> Self

Returns the “default value” for a type.