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<?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 - 2011, 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;

// Remove the CI_ prefix and lowercase

$lib_name = ucfirst(strtolower(str_replace('CI_', '', $this->lib_name)));

$driver_name = strtolower(str_replace('CI_', '', $child_class));

if (in_array($driver_name, 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)

{

// loves me some nesting!

foreach (array(ucfirst($driver_name), $driver_name) as $class)

{

$filepath = $path.'libraries/'.$lib_name.'/drivers/'.$class.'.php';

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 */