system/libraries/Driver.php - code-igniter-v3-giggi - Gitiles

 <?php
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
  * Licensed under the Open Software License version 3.0
  *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
  * http://opensource.org/licenses/OSL-3.0
  * If you did not receive a copy of the license and are unable to obtain it
  * through the world wide web, please send an email to
  * licensing@ellislab.com so we can send you a copy immediately.
  *
  * @package		CodeIgniter
  * @author		EllisLab Dev Team
  * @copyright	Copyright (c) 2006 - 2014, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 1.0
  * @filesource
  */
 defined('BASEPATH') OR exit('No direct script access allowed');

 /**
  * 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 {

 	/**
 	 * Array of drivers that are available to use with the driver class
 	 *
 	 * @var array
 	 */
 	protected $valid_drivers = array();

 	/**
 	 * Name of the current class - usually the driver class
 	 *
 	 * @var string
 	 */
 	protected $lib_name;

 	/**
 	 * Get magic method
 	 *
 	 * The first time a child is used it won't exist, so we instantiate it
 	 * subsequents calls will go straight to the proper child.
 	 *
 	 * @param	string	Child class name
 	 * @return	object	Child class
 	 */
 	public function __get($child)
 	{
 		// Try to load the driver
 		return $this->load_driver($child);
 	}

 	/**
 	 * Load driver
 	 *
 	 * Separate load_driver call to support explicit driver load by library or user
 	 *
 	 * @param	string	Driver name (w/o parent prefix)
 	 * @return	object	Child class
 	 */
 	public function load_driver($child)
 	{
 		// Get CodeIgniter instance and subclass prefix
 		$prefix = config_item('subclass_prefix');

 		if ( ! isset($this->lib_name))
 		{
 			// Get library name without any prefix
 			$this->lib_name = str_replace(array('CI_', $prefix), '', get_class($this));
 		}

 		// The child will be prefixed with the parent lib
 		$child_name = $this->lib_name.'_'.$child;

 		// See if requested child is a valid driver
 		if ( ! in_array($child, $this->valid_drivers))
 		{
 			// The requested driver isn't valid!
 			$msg = 'Invalid driver requested: '.$child_name;
 			log_message('error', $msg);
 			show_error($msg);
 		}

 		// Get package paths and filename case variations to search
 		$CI = get_instance();
 		$paths = $CI->load->get_package_paths(TRUE);

 		// Is there an extension?
 		$class_name = $prefix.$child_name;
 		$found = class_exists($class_name, FALSE);
 		if ( ! $found)
 		{
 			// Check for subclass file
 			foreach ($paths as $path)
 			{
 				// Does the file exist?
 				$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$prefix.$child_name.'.php';
 				if (file_exists($file))
 				{
 					// Yes - require base class from BASEPATH
 					$basepath = BASEPATH.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';
 					if ( ! file_exists($basepath))
 					{
 						$msg = 'Unable to load the requested class: CI_'.$child_name;
 						log_message('error', $msg);
 						show_error($msg);
 					}

 					// Include both sources and mark found
 					include_once($basepath);
 					include_once($file);
 					$found = TRUE;
 					break;
 				}
 			}
 		}

 		// Do we need to search for the class?
 		if ( ! $found)
 		{
 			// Use standard class name
 			$class_name = 'CI_'.$child_name;
 			if ( ! class_exists($class_name, FALSE))
 			{
 				// Check package paths
 				foreach ($paths as $path)
 				{
 					// Does the file exist?
 					$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';
 					if (file_exists($file))
 					{
 						// Include source
 						include_once($file);
 						break;
 					}
 				}
 			}
 		}

 		// Did we finally find the class?
 		if ( ! class_exists($class_name, FALSE))
 		{
 			if (class_exists($child_name, FALSE))
 			{
 				$class_name = $child_name;
 			}
 			else
 			{
 				$msg = 'Unable to load the requested driver: '.$class_name;
 				log_message('error', $msg);
 				show_error($msg);
 			}
 		}

 		// Instantiate, decorate and add child
 		$obj = new $class_name();
 		$obj->decorate($this);
 		$this->$child = $obj;
 		return $this->$child;
 	}

 }

 // --------------------------------------------------------------------------

 /**
  * 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 {

 	/**
 	 * Instance of the parent class
 	 *
 	 * @var object
 	 */
 	protected $_parent;

 	/**
 	 * List of methods in the parent class
 	 *
 	 * @var array
 	 */
 	protected $_methods = array();

 	/**
 	 * List of properties in the parent class
 	 *
 	 * @var array
 	 */
 	protected $_properties = array();

 	/**
 	 * Array of methods and properties for the parent class(es)
 	 *
 	 * @static
 	 * @var	array
 	 */
 	protected 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
 	 *
 	 * @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(EXIT_UNKNOWN_METHOD);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * __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 of file Driver.php */
 /* Location: ./system/libraries/Driver.php */
	<?php
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP 5.2.4 or newer
	*
	* NOTICE OF LICENSE
	*
	* Licensed under the Open Software License version 3.0
	*
	* This source file is subject to the Open Software License (OSL 3.0) that is
	* bundled with this package in the files license.txt / license.rst. It is
	* also available through the world wide web at this URL:
	* http://opensource.org/licenses/OSL-3.0
	* If you did not receive a copy of the license and are unable to obtain it
	* through the world wide web, please send an email to
	* licensing@ellislab.com so we can send you a copy immediately.
	*
	* @package CodeIgniter
	* @author EllisLab Dev Team
	* @copyright Copyright (c) 2006 - 2014, EllisLab, Inc. (http://ellislab.com/)
	* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
	* @link http://codeigniter.com
	* @since Version 1.0
	* @filesource
	*/
	defined('BASEPATH') OR exit('No direct script access allowed');

	/**
	* 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 {

	/**
	* Array of drivers that are available to use with the driver class
	*
	* @var array
	*/
	protected $valid_drivers = array();

	/**
	* Name of the current class - usually the driver class
	*
	* @var string
	*/
	protected $lib_name;

	/**
	* Get magic method
	*
	* The first time a child is used it won't exist, so we instantiate it
	* subsequents calls will go straight to the proper child.
	*
	* @param string Child class name
	* @return object Child class
	*/
	public function __get($child)
	{
	// Try to load the driver
	return $this->load_driver($child);
	}

	/**
	* Load driver
	*
	* Separate load_driver call to support explicit driver load by library or user
	*
	* @param string Driver name (w/o parent prefix)
	* @return object Child class
	*/
	public function load_driver($child)
	{
	// Get CodeIgniter instance and subclass prefix
	$prefix = config_item('subclass_prefix');

	if ( ! isset($this->lib_name))
	{
	// Get library name without any prefix
	$this->lib_name = str_replace(array('CI_', $prefix), '', get_class($this));
	}

	// The child will be prefixed with the parent lib
	$child_name = $this->lib_name.'_'.$child;

	// See if requested child is a valid driver
	if ( ! in_array($child, $this->valid_drivers))
	{
	// The requested driver isn't valid!
	$msg = 'Invalid driver requested: '.$child_name;
	log_message('error', $msg);
	show_error($msg);
	}

	// Get package paths and filename case variations to search
	$CI = get_instance();
	$paths = $CI->load->get_package_paths(TRUE);

	// Is there an extension?
	$class_name = $prefix.$child_name;
	$found = class_exists($class_name, FALSE);
	if ( ! $found)
	{
	// Check for subclass file
	foreach ($paths as $path)
	{
	// Does the file exist?
	$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$prefix.$child_name.'.php';
	if (file_exists($file))
	{
	// Yes - require base class from BASEPATH
	$basepath = BASEPATH.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';
	if ( ! file_exists($basepath))
	{
	$msg = 'Unable to load the requested class: CI_'.$child_name;
	log_message('error', $msg);
	show_error($msg);
	}

	// Include both sources and mark found
	include_once($basepath);
	include_once($file);
	$found = TRUE;
	break;
	}
	}
	}

	// Do we need to search for the class?
	if ( ! $found)
	{
	// Use standard class name
	$class_name = 'CI_'.$child_name;
	if ( ! class_exists($class_name, FALSE))
	{
	// Check package paths
	foreach ($paths as $path)
	{
	// Does the file exist?
	$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';
	if (file_exists($file))
	{
	// Include source
	include_once($file);
	break;
	}
	}
	}
	}

	// Did we finally find the class?
	if ( ! class_exists($class_name, FALSE))
	{
	if (class_exists($child_name, FALSE))
	{
	$class_name = $child_name;
	}
	else
	{
	$msg = 'Unable to load the requested driver: '.$class_name;
	log_message('error', $msg);
	show_error($msg);
	}
	}

	// Instantiate, decorate and add child
	$obj = new $class_name();
	$obj->decorate($this);
	$this->$child = $obj;
	return $this->$child;
	}

	}

	// --------------------------------------------------------------------------

	/**
	* 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 {

	/**
	* Instance of the parent class
	*
	* @var object
	*/
	protected $_parent;

	/**
	* List of methods in the parent class
	*
	* @var array
	*/
	protected $_methods = array();

	/**
	* List of properties in the parent class
	*
	* @var array
	*/
	protected $_properties = array();

	/**
	* Array of methods and properties for the parent class(es)
	*
	* @static
	* @var array
	*/
	protected 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
	*
	* @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(EXIT_UNKNOWN_METHOD);
	}

	// --------------------------------------------------------------------

	/**
	* __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 of file Driver.php */
	/* Location: ./system/libraries/Driver.php */