org.puremvc.java.patterns.observer
Class Observer

java.lang.Object
  extended by org.puremvc.java.patterns.observer.Observer
All Implemented Interfaces:
IObserver

public class Observer
extends java.lang.Object
implements IObserver

A base IObserver implementation.

An Observer is an object that encapsulates information about an interested object with a method that should be called when a particular INotification is broadcast.

In PureMVC, the Observer class assumes these responsibilities:

See Also:
View, Notification

Constructor Summary
Observer(IFunction notify, java.lang.Object context)
          Constructor.
 
Method Summary
 boolean compareNotifyContext(java.lang.Object object)
          Compare an object to the notification context.
 java.lang.Object getNotifyContext()
          Get the notification context.
 IFunction getNotifyMethod()
          Get the notification method.
 void notifyObserver(INotification notification)
          Notify the interested object.
 void setNotifyContext(java.lang.Object notifyContext)
          Set the notification context.
 void setNotifyMethod(IFunction notifyMethod)
          Set the notification method.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Observer

public Observer(IFunction notify,
                java.lang.Object context)
Constructor.

The notification method on the interested object should take one parameter of type INotification

Parameters:
notify - the notification method of the interested object
context - the notification context of the interested object
Method Detail

compareNotifyContext

public boolean compareNotifyContext(java.lang.Object object)
Compare an object to the notification context.

Specified by:
compareNotifyContext in interface IObserver
Parameters:
object - the object to compare
Returns:
boolean indicating if the object and the notification context are the same

notifyObserver

public void notifyObserver(INotification notification)
Notify the interested object.

Specified by:
notifyObserver in interface IObserver
Parameters:
notification - the INotification to pass to the interested object's notification method.

setNotifyContext

public void setNotifyContext(java.lang.Object notifyContext)
Set the notification context.

Specified by:
setNotifyContext in interface IObserver
Parameters:
notifyContext - the notification context (this) of the interested object.

setNotifyMethod

public void setNotifyMethod(IFunction notifyMethod)
Set the notification method.

The notification method should take one parameter of type INotification.

Specified by:
setNotifyMethod in interface IObserver
Parameters:
notifyMethod - the notification (callback) method of the interested object.

getNotifyMethod

public IFunction getNotifyMethod()
Get the notification method.

Returns:
the notification (callback) method of the interested object.

getNotifyContext

public java.lang.Object getNotifyContext()
Get the notification context.

Returns:
the notification context (this) of the interested object.