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Java > Open Source Codes > dynaop > observer > Subject


1 package dynaop.observer;
2
3 /**
4  * Subject of observation.
5  *
6  * @author Bob Lee (crazybob@crazybob.org)
7  */
8 public interface Subject {
9
10     /**
11      * Adds an <code>Observer</code>.
12      */
13     void addObserver(Observer observer);
14
15     /**
16      * Removes an <code>Observer</code>.
17      */
18     void removeObserver(Observer observer);
19
20     /**
21      * Notifies <code>Observer</code>s of a change.
22      */
23     void notifyObservers(Object JavaDoc argument);
24 }
25
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