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<?php
// /* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP Version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available through the world-wide-web at the following url: |
// | http://www.php.net/license/3_0.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Author: Stig Bakken <ssb@php.net> |
// | |
// +----------------------------------------------------------------------+
//
// $Id: Autoloader.php,v 1.11 2004/02/27 02:21:29 cellog Exp $
if (!extension_loaded("overload")) {
// die hard without ext/overload
die("Rebuild PHP with the `overload' extension to use PEAR_Autoloader");
}
require_once "PEAR.php";
/**
* This class is for objects where you want to separate the code for
* some methods into separate classes. This is useful if you have a
* class with not-frequently-used methods that contain lots of code
* that you would like to avoid always parsing.
*
* The PEAR_Autoloader class provides autoloading and aggregation.
* The autoloading lets you set up in which classes the separated
* methods are found. Aggregation is the technique used to import new
* methods, an instance of each class providing separated methods is
* stored and called every time the aggregated method is called.
*
* @author Stig Sæther Bakken <ssb@php.net>
*/
class PEAR_Autoloader extends PEAR
{
// {{{ properties
/**
* Map of methods and classes where they are defined
*
* @var array
*
* @access private
*/
var $_autoload_map = array();
/**
* Map of methods and aggregate objects
*
* @var array
*
* @access private
*/
var $_method_map = array();
// }}}
// {{{ addAutoload()
/**
* Add one or more autoload entries.
*
* @param string $method which method to autoload
*
* @param string $classname (optional) which class to find the method in.
* If the $method parameter is an array, this
* parameter may be omitted (and will be ignored
* if not), and the $method parameter will be
* treated as an associative array with method
* names as keys and class names as values.
*
* @return void
*
* @access public
*/
function addAutoload($method, $classname = null)
{
if (is_array($method)) {
array_walk($method, create_function('$a,&$b', '$b = strtolower($b);'));
$this->_autoload_map = array_merge($this->_autoload_map, $method);
} else {
$this->_autoload_map[strtolower($method)] = $classname;
}
}
// }}}
// {{{ removeAutoload()
/**
* Remove an autoload entry.
*
* @param string $method which method to remove the autoload entry for
*
* @return bool TRUE if an entry was removed, FALSE if not
*
* @access public
*/
function removeAutoload($method)
{
$method = strtolower($method);
$ok = isset($this->_autoload_map[$method]);
unset($this->_autoload_map[$method]);
return $ok;
}
// }}}
// {{{ addAggregateObject()
/**
* Add an aggregate object to this object. If the specified class
* is not defined, loading it will be attempted following PEAR's
* file naming scheme. All the methods in the class will be
* aggregated, except private ones (name starting with an
* underscore) and constructors.
*
* @param string $classname what class to instantiate for the object.
*
* @return void
*
* @access public
*/
function addAggregateObject($classname)
{
$classname = strtolower($classname);
if (!class_exists($classname)) {
$include_file = preg_replace('/[^a-z0-9]/i', '_', $classname);
include_once $include_file;
}
$obj =& new $classname;
$methods = get_class_methods($classname);
foreach ($methods as $method) {
// don't import priviate methods and constructors
if ($method{0} != '_' && $method != $classname) {
$this->_method_map[$method] = $obj;
}
}
}
// }}}
// {{{ removeAggregateObject()
/**
* Remove an aggregate object.
*
* @param string $classname the class of the object to remove
*
* @return bool TRUE if an object was removed, FALSE if not
*
* @access public
*/
function removeAggregateObject($classname)
{
$ok = false;
$classname = strtolower($classname);
reset($this->_method_map);
while (list($method, $obj) = each($this->_method_map)) {
if (is_a($obj, $classname)) {
unset($this->_method_map[$method]);
$ok = true;
}
}
return $ok;
}
// }}}
// {{{ __call()
/**
* Overloaded object call handler, called each time an
* undefined/aggregated method is invoked. This method repeats
* the call in the right aggregate object and passes on the return
* value.
*
* @param string $method which method that was called
*
* @param string $args An array of the parameters passed in the
* original call
*
* @return mixed The return value from the aggregated method, or a PEAR
* error if the called method was unknown.
*/
function __call($method, $args, &$retval)
{
$method = strtolower($method);
if (empty($this->_method_map[$method]) && isset($this->_autoload_map[$method])) {
$this->addAggregateObject($this->_autoload_map[$method]);
}
if (isset($this->_method_map[$method])) {
$retval = call_user_func_array(array($this->_method_map[$method], $method), $args);
return true;
}
return false;
}
// }}}
}
overload("PEAR_Autoloader");
?>
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