ArcaneFieldProvider<T> class abstract

The abstract base class for form field providers in the Arcane form system.

This class defines the interface for getting and setting form values, enabling dynamic validation and custom storage backends. Subclasses like ArcaneFieldMapProvider and ArcaneFieldDirectProvider implement the abstract onGetValue and onSetValue for specific persistence needs.

Implementers

• ArcaneFieldDirectProvider
• ArcaneFieldMapProvider

Constructors

ArcaneFieldProvider({required T defaultValue})

Properties

currentValue → T

Current value or default.

no setter

defaultValue → T

The default value used as a fallback when value retrieval fails.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

stream → Stream<T>

Stream of value changes.

no setter

Methods

dispose() → void

Dispose resources.

getValue(String k) → Future<T>

Retrieves the value for the given key, falling back to defaultValue on error.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onGetValue(String k) → Future<T>

Abstract method to retrieve the value associated with a key.

onSetValue(String k, T value) → Future<void>

Abstract method to set the value for a key.

setValue(String k, T value) → Future<void>

Sets the value for the given key and emits the new value.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited