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

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<?php
Load::directories('view/widgets');

/**
 * Static view factory
 * 
 * @author Gerd Riesselmann
 * @ingroup View
 */
class ViewFactory {
        /**
         * Implementation to delegate view creation to
         *
         * @var IViewFactory
         */
        private static $implementation = null;
        
        /**
         * Change Implementation
         *
         * @param $implementation 
         *   The new implementation
         * @param $keep_old 
         *   If set to TRUE, an existing implementation will not get replaced.
         *   Don't mix this with a call to set_old_implementation() of the new factory implementation,
         *   since this will always be done.   
         */
        public static function set_implementation(IViewFactory $implementation, $keep_old = false) {
                // keep old, if told so 
                if (!empty(self::$implementation)) {
                        if ($keep_old) {
                                return;
                        }
                        $implementation->set_old_implementation(self::$implementation); 
                }
                self::$implementation = $implementation;
        }
        
        /**
         * Create a suitable view
         *
         * @param $type The type of view to create as a string, e.g. "page", or "content", or "XML" ...  
         * @param $template_name Name of the template
         * @param $params Params to pass to view, may depend on type
         * @return IView
         */
        public static function create_view($type, $template_name, $params= false) {
                if (empty(self::$implementation)) {
                        self::set_implementation(new ViewFactoryBase());
                }
                return self::$implementation->create_view($type, $template_name, $params);
        }
}

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