fetchController method for CMS Admin application to find classes using the new MVC paradigm

fetchController.php

	/**
	 * Method to get a controller object.
	 *
	 * @param   string  $task  The task being executed
	 *
	 * @return  JController
	 *
	 * @since   x.y
	 * @throws  RuntimeException
	 */
	protected function fetchController($task)
	{
		// Initialise variables
		$option = $this->input->get('option');
		$task = explode('.', $task);
		$cPath = JPATH_ADMINISTRATOR . '/components/' . $option . '/controller/' . $task[1] . '.php';

		// First, check if a class exists at the component level
		if (is_file($cPath))
		{
			require_once $cPath;

			// Build the class name
			$class = ucfirst(substr($option, 4)) . 'Controller' . ucfirst($base[1]);
		}
		// Check the core library now
		elseif (class_exists('JController' . ucfirst($task[1])))
		{
			$class = 'JController' . ucfirst($task[1]);
		}
		// We don't have a class, panic.
		else
		{
			// Nothing found. Panic.
			throw new RuntimeException('Class for method ' . $task[1] . ' not found', 500);
		}

		// Define the component paths for legacy MVC use
		define('JPATH_COMPONENT', JPATH_BASE . '/components/' . $option);
		define('JPATH_COMPONENT_SITE', JPATH_SITE . '/components/' . $option);
		define('JPATH_COMPONENT_ADMINISTRATOR', JPATH_ADMINISTRATOR . '/components/' . $option);

		// Load common and local language files.
		$lang = JFactory::getLanguage();
		$lang->load($option, JPATH_BASE, null, false, false)
			|| $lang->load($option, JPATH_COMPONENT, null, false, false)
			|| $lang->load($option, JPATH_BASE, $lang->getDefault(), false, false)
			|| $lang->load($option, JPATH_COMPONENT, $lang->getDefault(), false, false);

		return new $class;
	}