Viewing file:  Driver.php (5.28 KB) -rw-r--r--
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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 */
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