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Diffstat (limited to 'inc/PEAR/Autoloader.php')
| -rwxr-xr-x | inc/PEAR/Autoloader.php | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/inc/PEAR/Autoloader.php b/inc/PEAR/Autoloader.php new file mode 100755 index 00000000000..de0278d6191 --- /dev/null +++ b/inc/PEAR/Autoloader.php @@ -0,0 +1,208 @@ +<?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"); + +?> |