Class IMediator

source code

object --+    
         |    
 INotifier --+
             |
            IMediator

Known Subclasses:

• patterns.mediator.Mediator

The interface definition for a PureMVC Mediator.

In PureMVC, IMediator implementors assume these responsibilities:

Implement a common method which returns a list of all INotifications the IMediator has interest in.

Implement a notification callback method.

Implement methods that are called when the IMediator is registered or removed from the View.

Additionally, IMediators typically:

Act as an intermediary between one or more view components such as text boxes or list controls, maintaining references and coordinating their behavior.

In Flash-based apps, this is often the place where event listeners are added to view components, and their handlers implemented.

Respond to and generate INotifications, interacting with of the rest of the PureMVC app.

When an IMediator is registered with the IView, the IView will call the IMediator's listNotificationInterests method. The IMediator will return an List of INotification names which it wishes to be notified about.

The IView will then create an Observer object encapsulating that IMediator's (handleNotification) method and register it as an Observer for each INotification name returned by listNotificationInterests.