<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 5.1.6 or newer * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2006 - 2010, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * CodeIgniter Driver Library Class * * This class enables you to create "Driver" libraries that add runtime ability * to extend the capabilities of a class via additional driver objects * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link */ class CI_Driver_Library { protected $valid_drivers = array(); protected static $lib_name; // The first time a child is used it won't exist, so we instantiate it // subsequents calls will go straight to the proper child. function __get($child) { if (! isset($this->lib_name)) { $this->lib_name = get_class($this); } // The class will be prefixed with the parent lib $child_class = $this->lib_name.'_'.$child; if (in_array(strtolower($child_class), array_map('strtolower', $this->valid_drivers))) { // check and see if the driver is in a separate file if ( ! class_exists($child_class)) { // check application path first foreach (array(APPPATH, BASEPATH) as $path) { // and check for case sensitivity of both the parent and child libs foreach (array(ucfirst($this->lib_name), strtolower($this->lib_name)) as $lib) { // loves me some nesting! foreach (array(ucfirst($child_class), strtolower($child_class)) as $class) { $filepath = $path.'libraries/'.$this->lib_name.'/drivers/'.$child_class.EXT; if (file_exists($filepath)) { include_once $filepath; break; } } } } // it's a valid driver, but the file simply can't be found if ( ! class_exists($child_class)) { log_message('error', "Unable to load the requested driver: ".$child_class); show_error("Unable to load the requested driver: ".$child_class); } } $obj = new $child_class; $obj->decorate($this); $this->$child = $obj; return $this->$child; } // The requested driver isn't valid! log_message('error', "Invalid driver requested: ".$child_class); show_error("Invalid driver requested: ".$child_class); } // -------------------------------------------------------------------- } // END CI_Driver_Library CLASS /** * CodeIgniter Driver Class * * This class enables you to create drivers for a Library based on the Driver Library. * It handles the drivers' access to the parent library * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link */ class CI_Driver { protected $parent; private $methods = array(); private $properties = array(); private static $reflections = array(); /** * Decorate * * Decorates the child with the parent driver lib's methods and properties * * @param object * @return void */ public function decorate($parent) { $this->parent = $parent; // Lock down attributes to what is defined in the class // and speed up references in magic methods $class_name = get_class($parent); if ( ! isset(self::$reflections[$class_name])) { $r = new ReflectionObject($parent); foreach ($r->getMethods() as $method) { if ($method->isPublic()) { $this->methods[] = $method->getName(); } } foreach($r->getProperties() as $prop) { if ($prop->isPublic()) { $this->properties[] = $prop->getName(); } } self::$reflections[$class_name] = array($this->methods, $this->properties); } else { list($this->methods, $this->properties) = self::$reflections[$class_name]; } } // -------------------------------------------------------------------- /** * __call magic method * * Handles access to the parent driver library's methods * * @access public * @param string * @param array * @return mixed */ public function __call($method, $args = array()) { if (in_array($method, $this->methods)) { return call_user_func_array(array($this->parent, $method), $args); } $trace = debug_backtrace(); _exception_handler(E_ERROR, "No such method '{$method}'", $trace[1]['file'], $trace[1]['line']); exit; } // -------------------------------------------------------------------- /** * __get magic method * * Handles reading of the parent driver library's properties * * @param string * @return mixed */ public function __get($var) { if (in_array($var, $this->properties)) { return $this->parent->$var; } } // -------------------------------------------------------------------- /** * __set magic method * * Handles writing to the parent driver library's properties * * @param string * @param array * @return mixed */ public function __set($var, $val) { if (in_array($var, $this->properties)) { $this->parent->$var = $val; } } // -------------------------------------------------------------------- } // END CI_Driver CLASS /* End of file Driver.php */ /* Location: ./system/libraries/Driver.php */