1 | <?php |
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2 | |
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3 | /** |
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4 | * Specialization of the BaseFactory class. |
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5 | * This class is used to instantiate classes for |
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6 | * processes. You cannot access this class directly, |
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7 | * but requests to the Factory frontend class in |
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8 | * 'secured mode' will be forwarded to this class. |
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9 | * It should be much more restrictive than its |
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10 | * older brother (or sister), WorkflowFactory... |
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11 | * |
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12 | * @author Pedro Eugênio Rocha |
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13 | * @package Factory |
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14 | */ |
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15 | final class ProcessFactory extends BaseFactory { |
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16 | |
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17 | |
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18 | /** |
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19 | * @var boolean $_instantiated Attribute that stores whether this |
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20 | * class was instantiated or not. This is used to limit the |
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21 | * instantiation of this class. |
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22 | * @access private |
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23 | * @static |
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24 | */ |
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25 | private static $_instantiated = false; |
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26 | |
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27 | /** |
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28 | * Construct the class. This function will inform which classes |
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29 | * you will be able to instantiate and where to find it. |
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30 | * This function implements a kind of singleton design pattern too. |
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31 | * @access public |
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32 | */ |
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33 | public function __construct() { |
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34 | |
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35 | /* don't let the user to instantiate this class more than once. */ |
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36 | if (self::$_instantiated) |
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37 | throw new Exception("You can't instantiate this class again."); |
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38 | |
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39 | /* registering allowed classes */ |
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40 | //$this->registerFileInfo('WorkflowObjects', 'class.WorkflowObjects.inc.php', 'inc'); |
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41 | |
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42 | /* ok. no more instances of this class.. */ |
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43 | self::$_instantiated = true; |
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44 | } |
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45 | } |
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46 | |
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47 | ?> |
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