AutoloaderFactory.php

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<?php
#require_once dirname(__FILE__) . '/SplAutoloader.php';

if (class_exists('Zend_Loader_AutoloaderFactory')) return;

abstract class Zend_Loader_AutoloaderFactory
{
    const STANDARD_AUTOLOADER  = 'Zend_Loader_StandardAutoloader';
    const CLASS_MAP_AUTOLOADER = 'Zend_Loader_ClassMapAutoloader';

    protected static $loaders = array();

    protected static $standardAutoloader;

    public static function factory($options = null)
    {
        if (null === $options) {
            if (!isset(self::$loaders[self::STANDARD_AUTOLOADER])) {
                $autoloader = self::getStandardAutoloader();
                $autoloader->register();
                self::$loaders[self::STANDARD_AUTOLOADER] = $autoloader;
            }

            // Return so we don't hit the next check's exception (we're done here anyway)
            return;
        }

        if (!is_array($options) && !($options instanceof Traversable)) {
            #require_once 'Exception/InvalidArgumentException.php';
            throw new Zend_Loader_Exception_InvalidArgumentException(
                'Options provided must be an array or Traversable'
            );
        }

        foreach ($options as $class => $options) {
            if (!isset(self::$loaders[$class])) {
                // Check class map autoloader
                if ($class == self::CLASS_MAP_AUTOLOADER) {
                    if (!class_exists(self::CLASS_MAP_AUTOLOADER)) {
                        // Extract the filename from the classname
                        $classMapLoader = substr(
                            strrchr(self::CLASS_MAP_AUTOLOADER, '_'), 1
                        );

                        require_once dirname(__FILE__) . "/$classMapLoader.php";
                    }
                }

                // Autoload with standard autoloader
                $autoloader = self::getStandardAutoloader();
                if (!class_exists($class) && !$autoloader->autoload($class)) {
                    #require_once 'Exception/InvalidArgumentException.php';
                    throw new Zend_Loader_Exception_InvalidArgumentException(sprintf(
                        'Autoloader class "%s" not loaded',
                        $class
                    ));
                }

                // unfortunately is_subclass_of is broken on some 5.3 versions
                // additionally instanceof is also broken for this use case
                if (version_compare(PHP_VERSION, '5.3.7', '>=')) {
                        if (!is_subclass_of($class, 'Zend_Loader_SplAutoloader')) {
                        #require_once 'Exception/InvalidArgumentException.php';
                        throw new Zend_Loader_Exception_InvalidArgumentException(sprintf(
                            'Autoloader class %s must implement Zend\\Loader\\SplAutoloader',
                            $class
                        ));
                    }
                }

                if ($class === self::STANDARD_AUTOLOADER) {
                    $autoloader->setOptions($options);
                } else {
                    $autoloader = new $class($options);
                }
                $autoloader->register();
                self::$loaders[$class] = $autoloader;
            } else {
                self::$loaders[$class]->setOptions($options);
            }
        }
    }

    public static function getRegisteredAutoloaders()
    {
        return self::$loaders;
    }

    public static function getRegisteredAutoloader($class)
    {
        if (!isset(self::$loaders[$class])) {
            #require_once 'Exception/InvalidArgumentException.php';
            throw new Zend_Loader_Exception_InvalidArgumentException(sprintf('Autoloader class "%s" not loaded', $class));
        }
        return self::$loaders[$class];
    }

    public static function unregisterAutoloaders()
    {
        foreach (self::getRegisteredAutoloaders() as $class => $autoloader) {
            spl_autoload_unregister(array($autoloader, 'autoload'));
            unset(self::$loaders[$class]);
        }
    }

    public static function unregisterAutoloader($autoloaderClass)
    {
        if (!isset(self::$loaders[$autoloaderClass])) {
            return false;
        }

        $autoloader = self::$loaders[$autoloaderClass];
        spl_autoload_unregister(array($autoloader, 'autoload'));
        unset(self::$loaders[$autoloaderClass]);
        return true;
    }

    protected static function getStandardAutoloader()
    {
        if (null !== self::$standardAutoloader) {
            return self::$standardAutoloader;
        }

        // Extract the filename from the classname
        $stdAutoloader = substr(strrchr(self::STANDARD_AUTOLOADER, '_'), 1);

        if (!class_exists(self::STANDARD_AUTOLOADER)) {
            #require_once dirname(__FILE__) . "/$stdAutoloader.php";
        }
        $loader = new Zend_Loader_StandardAutoloader();
        self::$standardAutoloader = $loader;
        return self::$standardAutoloader;
    }
}