Snapshot class

Immutable snapshot of application state.

A snapshot contains:

• timestamp: When the snapshot was created (UTC)
• appVersion: Version of the application that created the snapshot
• schemaVersion: Version of the snapshot schema format
• states: Map of state keys to their serialized state data
• metadata: Optional custom metadata attached to the snapshot

Snapshots are immutable and can be safely shared or stored. They implement proper equality semantics based on all fields.

Constructors

Snapshot({required DateTime timestamp, required String appVersion, required int schemaVersion, required Map<String, dynamic> states, Map<String, dynamic>? metadata})

Creates a new snapshot with the given fields.

const

Properties

appVersion → String

Version of the application that created this snapshot.

final

hashCode → int

The hash code for this object.

no setter, override

metadata → Map<String, dynamic>?

Optional custom metadata attached to the snapshot.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

schemaVersion → int

Version of the snapshot schema format.

final

states → Map<String, dynamic>

Map of state keys to their serialized state data.

final

timestamp → DateTime

UTC timestamp when the snapshot was created.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

Converts this snapshot to a JSON-serializable map.

toJsonString({bool pretty = false}) → String

Converts this snapshot to a JSON string.

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override