gyro/core/view/base/viewfactorybase.cls.php

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00001 <?php
00002 
00003 /**
00004  * Default implementation of view factory
00005  * 
00006  * @author Gerd Riesselmann
00007  * @ingroup View
00008  */
00009 class ViewFactoryBase implements IViewFactory {
00010         /**
00011          * Old implementation to delegate to  
00012          *
00013          * @var IViewFactory
00014          */
00015         private $delegate = null;
00016         
00017         /**
00018          * Create a suitable view
00019          *
00020          * @param $type The type of view to create as string e.g. "page", or "content", or "XML" ...  
00021          * @param $template_name Name of the template
00022          * @param $params Params to pass to view, may depend on type
00023          * @return IView
00024          */
00025         public function create_view($type, $template_name, $params) {
00026                 if ($this->delegate) {
00027                         return $this->delegate->create_view($type, $template_name, $params);
00028                 }
00029                 else {
00030                         switch ($type) {
00031                                 case IViewFactory::PAGE:
00032                                         require_once(dirname(__FILE__) . '/pageviewbase.cls.php');
00033                                         return new PageViewBase($params, $template_name);
00034                                 case IViewFactory::CONTENT:
00035                                         require_once(dirname(__FILE__) . '/contentviewbase.cls.php');
00036                                         return new ContentViewBase($template_name, $params);
00037                                 case IViewFactory::MESSAGE:
00038                                         require_once(dirname(__FILE__) . '/messageviewbase.cls.php');
00039                                         return new MessageViewBase($template_name);
00040                                 case IViewFactory::XML:
00041                                         require_once(dirname(__FILE__) . '/xmlviewbase.cls.php');
00042                                         return new XmlViewBase($template_name, $params);
00043                         }
00044                 }
00045                 throw new Exception(tr('Unkown view type %t','core', array('%t' => $type)));
00046         }
00047 
00048         /**
00049          * Set old implementation. Requests not handled should be delegated to this
00050          *
00051          * @param $implementation Another IViewFactory
00052          */
00053         public function set_old_implementation(IViewFactory $implementation) {
00054                 $this->delegate = $implementation;
00055         }
00056 }