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[hub.git] / application / hub / main / factories / node / class_NodeObjectFactory.php
1 <?php
2 /**
3  * A factory class for nodes
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.0.0
7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
8  * @license             GNU GPL 3.0 or any newer version
9  * @link                http://www.ship-simu.org
10  *
11  * This program is free software: you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation, either version 3 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program. If not, see <http://www.gnu.org/licenses/>.
23  */
24 class NodeObjectFactory extends ObjectFactory {
25         /**
26          * Protected constructor
27          *
28          * @return      void
29          */
30         protected function __construct () {
31                 // Call parent constructor
32                 parent::__construct(__CLASS__);
33         }
34
35         /**
36          * Returns a singleton (registry-based) NodeHelper instance
37          *
38          * @param       $requestInstance        An instance of a class with an Requestable interface
39          * @param       $responseInstance       An instance of a class with an Responseable interface
40          * @return      $nodeInstance           An instance of a NodeHelper class
41          * @throws      FactoryRequiredParameterException       If not all parameters are set and no instance 'node' is set.
42          */
43         public static final function createNodeInstance (Requestable $requestInstance = NULL, Responseable $responseInstance = NULL) {
44                 // If there is no handler?
45                 if (Registry::getRegistry()->instanceExists('node')) {
46                         // Get handler from registry
47                         $nodeInstance = NodeObjectFactory::createNodeInstance();
48                 } elseif (($requestInstance instanceof Requestable) && ($responseInstance instanceof Responseable)) {
49                         // The default node-mode is from our configuration
50                         $nodeMode = $this->getConfigInstance()->getConfigEntry('node_default_mode');
51
52                         // Is the node 'mode' parameter set?
53                         if ($requestInstance->isRequestElementSet('mode')) {
54                                 // Then use this which overrides the config entry temporarily
55                                 $nodeMode = $requestInstance->getRequestElement('mode');
56                         } else {
57                                 // Set it for easier re-usage
58                                 $requestInstance->setRequestElement('mode', $nodeMode);
59                         }
60
61                         // Now convert the node-mode in a class name
62                         $className = 'Hub' . $this->convertToClassName($nodeMode) . 'Node';
63
64                         // Get the node instance
65                         $nodeInstance = ObjectFactory::createObjectByName($className, array($requestInstance));
66
67                         // Get a registry
68                         $applicationInstance = Registry::getRegistry()->getInstance('app');
69
70                         // Set the app instance
71                         $nodeInstance->setApplicationInstance($applicationInstance);
72
73                         // Add node-specific filters
74                         $nodeInstance->addExtraFilters($applicationInstance->getControllerInstance(), $responseInstance);
75
76                         // Add it to the registry
77                         Registry::getRegistry()->addInstance('node', $nodeInstance);
78                 } else {
79                         // Throw an exception here
80                         throw new FactoryRequiredParameterException(new NodeObjectFactory(), self::EXCEPTION_FACTORY_REQUIRE_PARAMETER);
81                 }
82
83                 // Return the instance
84                 return $nodeInstance;
85         }
86 }
87
88 // [EOF]
89 ?>