JsonFilePersister<T> class Null safety

Persistence component that loads and saves data from/to flat file.

It is used by FilePersistence, but can be useful on its own.

Configuration parameters

  • path: path to the file where data is stored

Example

var persister = JsonFilePersister("./data/data.json");

await persister.save("123", ["A", "B", "C"]);
    ...
var items = await persister.load("123");
print(items);  // Result: ["A", "B", "C"]
Implemented types

Constructors

JsonFilePersister([String? path])
Creates a new instance of the persistence.

Properties

hashCode → int
The hash code for this object.
read-onlyinherited
path ↔ String?
Gets the file path where data is stored.
read / write
path_ ↔ String?
read / write
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

configure(ConfigParams config) → void
Configures component by passing configuration parameters.
override
load(String? correlation_id) → Future<List<T>>
Loads data items from external JSON file.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
save(String? correlation_id, List<T?> items) → Future
Saves given data items to external JSON file.
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited