Interface IObserver
- All Known Implementing Classes:
Observer
public interface IObserver
The interface definition for a PureMVC Observer.
In PureMVC, IObserver
implementors assume these responsibilities:
- Encapsulate the notification (callback) method of the interested object.
- Encapsulate the notification context (this) of the interested object.
- Provide methods for setting the interested object' notification method and context.
- Provide a method for notifying the interested object.
PureMVC does not rely upon underlying event models such as the one provided with Flash, and ActionScript 3 does not have an inherent event model.
The Observer Pattern as implemented within PureMVC exists to support event driven communication between the application and the actors of the MVC triad.
An Observer is an object that encapsulates information
about an interested object with a notification method that
should be called when an INotification
is broadcast. The Observer then
acts as a proxy for notifying the interested object.
Observers can receive Notification
s by having their
notifyObserver
method invoked, passing
in an object implementing the INotification
interface, such
as a subclass of Notification
.
- See Also:
IView
,INotification
-
Method Summary
Modifier and Type Method Description boolean
compareNotifyContext(java.lang.Object object)
Compare the given object to the notification context object.void
notifyObserver(INotification notification)
Notify the interested object.void
setNotifyContext(java.lang.Object notifyContext)
Set the notification context.void
setNotifyMethod(java.util.function.Consumer<INotification> notifyMethod)
Set the notification method.
-
Method Details
-
setNotifyMethod
Set the notification method.
The notification method should take one parameter of type
INotification
- Parameters:
notifyMethod
- the notification (callback) method of the interested object
-
setNotifyContext
void setNotifyContext(java.lang.Object notifyContext)Set the notification context.
- Parameters:
notifyContext
- the notification context (this) of the interested object
-
notifyObserver
Notify the interested object.
- Parameters:
notification
- theINotification
to pass to the interested object's notification method
-
compareNotifyContext
boolean compareNotifyContext(java.lang.Object object)Compare the given object to the notification context object.
- Parameters:
object
- the object to compare.- Returns:
- boolean indicating if the notification context and the object are the same.
-