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February 14, 2015 17:10
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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 = strtolower(preg_replace('/^CI_/', '', $this->lib_name)); | |
$driver_name = strtolower(preg_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/'.$class.EXT; | |
if (file_exists($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 */ |
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