org.puremvc.java.multicore.patterns.observer
Class Notification

java.lang.Object
  extended by org.puremvc.java.multicore.patterns.observer.Notification
All Implemented Interfaces:
INotification

public class Notification
extends Object
implements INotification

A base INotification implementation.

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.

Notifications are not meant to be a replacement for Events in Flex/Flash/Apollo. Generally, IMediator implementors place event listeners on their view components, which they then handle in the usual way. This may lead to the broadcast of Notifications to trigger ICommands or to communicate with other IMediators. IProxy and ICommand instances communicate with each other and IMediators by broadcasting INotifications.

A key difference between Flash Events and PureMVC Notifications is that Events follow the 'Chain of Responsibility' pattern, 'bubbling' up the display hierarchy until some parent component handles the Event, while PureMVC Notifications follow a 'Publish/Subscribe' pattern. PureMVC classes need not be related to each other in a parent/child relationship in order to communicate with one another using Notifications.

See Also:
Observer

Constructor Summary
Notification(String name)
          Constructor.
Notification(String name, Object body)
          Constructor.
Notification(String name, Object body, String type)
          Constructor.
 
Method Summary
 Object getBody()
          Get the body of the Notification instance.
 String getName()
          Get the name of the Notification instance.
 String getType()
          Get the type of the Notification instance.
 void setBody(Object body)
          Set the body of the Notification instance.
 void setType(String type)
          Set the type of the Notification instance.
 String toString()
          Get the string representation of the Notification instance.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Notification

public Notification(String name,
                    Object body,
                    String type)
Constructor.

Parameters:
name - name of the Notification instance. (required)
body - the Notification body. (optional)
type - the type of the Notification (optional)

Notification

public Notification(String name)
Constructor.

Parameters:
name - name of the Notification instance. (required)

Notification

public Notification(String name,
                    Object body)
Constructor.

Parameters:
name - name of the Notification instance. (required)
body - the Notification body. (optional)
Method Detail

getBody

public Object getBody()
Get the body of the Notification instance.

Specified by:
getBody in interface INotification
Returns:
the body object.

getName

public String getName()
Get the name of the Notification instance.

Specified by:
getName in interface INotification
Returns:
the name of the Notification instance.

getType

public String getType()
Get the type of the Notification instance.

Specified by:
getType in interface INotification
Returns:
the type

setBody

public void setBody(Object body)
Set the body of the Notification instance.

Specified by:
setBody in interface INotification
Parameters:
body -

setType

public void setType(String type)
Set the type of the Notification instance.

Specified by:
setType in interface INotification
Parameters:
type -

toString

public String toString()
Get the string representation of the Notification instance.

Specified by:
toString in interface INotification
Overrides:
toString in class Object
Returns:
the string representation of the Notification instance.


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