CallbackHandler<CallbackInputType, CallbackReturnType> class

Implementation of ICallbackHandler for managing callbacks with generic types.

This class provides a high-performance callback management system using FastMap for O(1) registration and removal operations.

Type parameters:

• CallbackInputType - The input parameter type accepted by callbacks
• CallbackReturnType - The return type produced by callbacks

Example:

final handler = CallbackHandler<String, int>();
handler.register((input) => input.length);
final results = handler.call('Hello');
print(results); // {callback_hashCode: 5}

Performance characteristics:

• Register: O(1) amortized
• Unregister: O(1)
• Invoke/Call: O(n) where n is the number of registered callbacks
• Clear: O(n)

Implemented types

• ICallbackHandler<CallbackInputType, CallbackReturnType>

Constructors

CallbackHandler()

Creates a new CallbackHandler instance.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

map → FastMap<int, CallbackWithReturn<CallbackInputType, CallbackReturnType>>

Internal storage for registered callbacks.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call(CallbackInputType input) → Map<int, CallbackReturnType>

Make the handler callable as a function

override

clear() → void

Clear all registered callbacks

override

invoke(CallbackInputType input) → Map<int, CallbackReturnType>

Invoke all registered callbacks with the given input (deprecated).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

register(CallbackWithReturn<CallbackInputType, CallbackReturnType> callback) → void

Register a callback

override

toString() → String

A string representation of this object.

inherited

unregister(CallbackWithReturn<CallbackInputType, CallbackReturnType> callback) → void

Unregister a callback

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited