portal/patient/fwk/libs/verysimple/Phreeze/Observable.php

   1 <?php
   2 /** @package    verysimple::Phreeze */
   3
   4 /**
   5  * import supporting libraries
   6  */
   7 require_once ("IObservable.php");
   8
   9 /**
  10  * Observable is an abstract implementation of IObservable
  11  *
  12  * @package verysimple::Phreeze
  13  * @author VerySimple Inc.
  14  * @copyright 1997-2005 VerySimple, Inc.
  15  * @license http://www.gnu.org/licenses/lgpl.html LGPL
  16  * @version 2.0
  17  */
  18 abstract class Observable implements IObservable {
  19         private $_observers = Array ();
  20
  21         /**
  22          * Registers an observer with this object
  23          *
  24          * @param IObserver $observer
  25          */
  26         public function AttachObserver($observer) {
  27                 if ($observer) {
  28                         $this->_observers [] = & $observer;
  29                 }
  30         }
  31
  32         /**
  33          * Fires and observable event.
  34          * All registered observers will be notified
  35          *
  36          * @param variant $obj
  37          *              a string, numeric or object that contains the observable message
  38          * @param int $ltype
  39          *              specified the "level" as defined in IObservable
  40          */
  41         public function Observe($obj, $ltype = OBSERVE_INFO) {
  42                 foreach ( $this->_observers as $observer ) {
  43                         $observer->Observe ( $obj, $ltype );
  44                 }
  45         }
  46 }
  47
  48 ?>