| 1 | <?php |
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| 2 | /**************************************************************************\ |
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| 3 | * eGroupWare * |
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| 4 | * http://www.egroupware.org * |
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| 5 | * -------------------------------------------- * |
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| 6 | * This program is free software; you can redistribute it and/or modify it * |
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| 7 | * under the terms of the GNU General Public License as published by the * |
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| 8 | * Free Software Foundation; either version 2 of the License, or (at your * |
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| 9 | * option) any later version. * |
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| 10 | \**************************************************************************/ |
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| 11 | |
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| 12 | /** |
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| 13 | * Specialization of the BaseFactory class. |
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| 14 | * This class is used to instantiate classes by |
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| 15 | * the workflow module (not by processes). You |
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| 16 | * cannot access this class directly, but requests |
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| 17 | * to the Factory frontend class in 'unsecured mode' |
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| 18 | * will be forwarded to this class. |
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| 19 | * |
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| 20 | * @package Factory |
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| 21 | * @license http://www.gnu.org/copyleft/gpl.html GPL |
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| 22 | * @author Pedro Eugênio Rocha - pedro.eugenio.rocha@gmail.com |
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| 23 | */ |
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| 24 | final class WorkflowFactory extends BaseFactory { |
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| 25 | |
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| 26 | |
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| 27 | /** |
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| 28 | * @var boolean $_instantiated Attribute that stores whether this |
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| 29 | * class was instantiated or not. This is used to limit the |
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| 30 | * instantiation of this class. |
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| 31 | * @access private |
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| 32 | * @static |
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| 33 | */ |
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| 34 | private static $_instantiated = false; |
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| 35 | |
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| 36 | |
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| 37 | /** |
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| 38 | * Construct the class. This function will inform which classes |
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| 39 | * you will be able to instantiate and where to find it. |
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| 40 | * This function implements a kind of singleton design pattern too. |
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| 41 | * @access public |
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| 42 | */ |
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| 43 | public function __construct() { |
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| 44 | |
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| 45 | /* don't let the user to instantiate this class more than once. */ |
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| 46 | if (self::$_instantiated) |
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| 47 | throw new Exception("You can't instantiate this class again."); |
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| 48 | |
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| 49 | /* registering allowed classes */ |
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| 50 | $this->registerFileInfo('WorkflowObjects', 'class.WorkflowObjects.inc.php', 'inc'); |
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| 51 | |
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| 52 | $this->registerFileInfo('db', 'x', 'inc', PHPGW_API_INC); |
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| 53 | |
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| 54 | /* ok. no more instances of this class.. */ |
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| 55 | self::$_instantiated = true; |
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| 56 | } |
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| 57 | } |
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| 58 | |
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| 59 | ?> |
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