585 lines
16 KiB
PHP
585 lines
16 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Loader
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* @subpackage Autoloader
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @version $Id: Autoloader.php 18339 2009-09-21 15:05:25Z matthew $
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/** Zend_Loader */
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require_once 'Zend/Loader.php';
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/**
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* Autoloader stack and namespace autoloader
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*
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* @uses Zend_Loader_Autoloader
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* @package Zend_Loader
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* @subpackage Autoloader
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Loader_Autoloader
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{
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/**
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* @var Zend_Loader_Autoloader Singleton instance
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*/
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protected static $_instance;
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/**
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* @var array Concrete autoloader callback implementations
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*/
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protected $_autoloaders = array();
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/**
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* @var array Default autoloader callback
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*/
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protected $_defaultAutoloader = array('Zend_Loader', 'loadClass');
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/**
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* @var bool Whether or not to act as a fallback autoloader
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*/
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protected $_fallbackAutoloader = false;
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/**
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* @var array Callback for internal autoloader implementation
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*/
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protected $_internalAutoloader;
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/**
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* @var array Supported namespaces 'Zend' and 'ZendX' by default.
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*/
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protected $_namespaces = array(
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'Zend_' => true,
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'ZendX_' => true,
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);
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/**
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* @var array Namespace-specific autoloaders
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*/
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protected $_namespaceAutoloaders = array();
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/**
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* @var bool Whether or not to suppress file not found warnings
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*/
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protected $_suppressNotFoundWarnings = false;
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/**
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* @var null|string
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*/
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protected $_zfPath;
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/**
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* Retrieve singleton instance
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*
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* @return Zend_Loader_Autoloader
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*/
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public static function getInstance()
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{
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if (null === self::$_instance) {
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self::$_instance = new self();
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}
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return self::$_instance;
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}
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/**
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* Reset the singleton instance
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*
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* @return void
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*/
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public static function resetInstance()
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{
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self::$_instance = null;
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}
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/**
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* Autoload a class
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*
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* @param string $class
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* @return bool
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*/
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public static function autoload($class)
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{
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$self = self::getInstance();
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foreach ($self->getClassAutoloaders($class) as $autoloader) {
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if ($autoloader instanceof Zend_Loader_Autoloader_Interface) {
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if ($autoloader->autoload($class)) {
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return true;
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}
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} elseif (is_string($autoloader)) {
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if ($autoloader($class)) {
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return true;
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}
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} elseif (is_array($autoloader)) {
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$object = array_shift($autoloader);
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$method = array_shift($autoloader);
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if (call_user_func(array($object, $method), $class)) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Set the default autoloader implementation
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*
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* @param string|array $callback PHP callback
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* @return void
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*/
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public function setDefaultAutoloader($callback)
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{
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if (!is_callable($callback)) {
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throw new Zend_Loader_Exception('Invalid callback specified for default autoloader');
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}
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$this->_defaultAutoloader = $callback;
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return $this;
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}
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/**
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* Retrieve the default autoloader callback
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*
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* @return string|array PHP Callback
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*/
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public function getDefaultAutoloader()
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{
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return $this->_defaultAutoloader;
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}
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/**
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* Set several autoloader callbacks at once
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*
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* @param array $autoloaders Array of PHP callbacks (or Zend_Loader_Autoloader_Interface implementations) to act as autoloaders
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* @return Zend_Loader_Autoloader
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*/
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public function setAutoloaders(array $autoloaders)
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{
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$this->_autoloaders = $autoloaders;
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return $this;
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}
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/**
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* Get attached autoloader implementations
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*
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* @return array
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*/
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public function getAutoloaders()
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{
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return $this->_autoloaders;
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}
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/**
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* Return all autoloaders for a given namespace
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*
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* @param string $namespace
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* @return array
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*/
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public function getNamespaceAutoloaders($namespace)
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{
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$namespace = (string) $namespace;
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if (!array_key_exists($namespace, $this->_namespaceAutoloaders)) {
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return array();
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}
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return $this->_namespaceAutoloaders[$namespace];
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}
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/**
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* Register a namespace to autoload
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*
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* @param string|array $namespace
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* @return Zend_Loader_Autoloader
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*/
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public function registerNamespace($namespace)
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{
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if (is_string($namespace)) {
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$namespace = (array) $namespace;
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} elseif (!is_array($namespace)) {
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throw new Zend_Loader_Exception('Invalid namespace provided');
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}
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foreach ($namespace as $ns) {
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if (!isset($this->_namespaces[$ns])) {
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$this->_namespaces[$ns] = true;
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}
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}
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return $this;
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}
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/**
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* Unload a registered autoload namespace
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*
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* @param string|array $namespace
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* @return Zend_Loader_Autoloader
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*/
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public function unregisterNamespace($namespace)
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{
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if (is_string($namespace)) {
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$namespace = (array) $namespace;
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} elseif (!is_array($namespace)) {
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throw new Zend_Loader_Exception('Invalid namespace provided');
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}
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foreach ($namespace as $ns) {
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if (isset($this->_namespaces[$ns])) {
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unset($this->_namespaces[$ns]);
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}
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}
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return $this;
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}
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/**
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* Get a list of registered autoload namespaces
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*
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* @return array
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*/
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public function getRegisteredNamespaces()
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{
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return array_keys($this->_namespaces);
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}
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public function setZfPath($spec, $version = 'latest')
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{
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$path = $spec;
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if (is_array($spec)) {
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if (!isset($spec['path'])) {
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throw new Zend_Loader_Exception('No path specified for ZF');
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}
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$path = $spec['path'];
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if (isset($spec['version'])) {
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$version = $spec['version'];
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}
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}
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$this->_zfPath = $this->_getVersionPath($path, $version);
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set_include_path(implode(PATH_SEPARATOR, array(
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$this->_zfPath,
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get_include_path(),
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)));
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return $this;
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}
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public function getZfPath()
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{
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return $this->_zfPath;
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}
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/**
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* Get or set the value of the "suppress not found warnings" flag
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*
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* @param null|bool $flag
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* @return bool|Zend_Loader_Autoloader Returns boolean if no argument is passed, object instance otherwise
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*/
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public function suppressNotFoundWarnings($flag = null)
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{
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if (null === $flag) {
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return $this->_suppressNotFoundWarnings;
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}
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$this->_suppressNotFoundWarnings = (bool) $flag;
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return $this;
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}
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/**
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* Indicate whether or not this autoloader should be a fallback autoloader
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*
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* @param bool $flag
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* @return Zend_Loader_Autoloader
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*/
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public function setFallbackAutoloader($flag)
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{
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$this->_fallbackAutoloader = (bool) $flag;
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return $this;
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}
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/**
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* Is this instance acting as a fallback autoloader?
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*
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* @return bool
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*/
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public function isFallbackAutoloader()
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{
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return $this->_fallbackAutoloader;
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}
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/**
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* Get autoloaders to use when matching class
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*
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* Determines if the class matches a registered namespace, and, if so,
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* returns only the autoloaders for that namespace. Otherwise, it returns
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* all non-namespaced autoloaders.
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*
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* @param string $class
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* @return array Array of autoloaders to use
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*/
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public function getClassAutoloaders($class)
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{
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$namespace = false;
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$autoloaders = array();
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// Add concrete namespaced autoloaders
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foreach (array_keys($this->_namespaceAutoloaders) as $ns) {
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if ('' == $ns) {
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continue;
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}
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if (0 === strpos($class, $ns)) {
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$namespace = $ns;
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$autoloaders = $autoloaders + $this->getNamespaceAutoloaders($ns);
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break;
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}
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}
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// Add internal namespaced autoloader
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foreach ($this->getRegisteredNamespaces() as $ns) {
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if (0 === strpos($class, $ns)) {
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$namespace = $ns;
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$autoloaders[] = $this->_internalAutoloader;
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break;
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}
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}
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// Add non-namespaced autoloaders
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$autoloaders = $autoloaders + $this->getNamespaceAutoloaders('');
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// Add fallback autoloader
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if (!$namespace && $this->isFallbackAutoloader()) {
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$autoloaders[] = $this->_internalAutoloader;
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}
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return $autoloaders;
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}
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/**
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* Add an autoloader to the beginning of the stack
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*
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* @param object|array|string $callback PHP callback or Zend_Loader_Autoloader_Interface implementation
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* @param string|array $namespace Specific namespace(s) under which to register callback
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* @return Zend_Loader_Autoloader
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*/
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public function unshiftAutoloader($callback, $namespace = '')
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{
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$autoloaders = $this->getAutoloaders();
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array_unshift($autoloaders, $callback);
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$this->setAutoloaders($autoloaders);
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$namespace = (array) $namespace;
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foreach ($namespace as $ns) {
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$autoloaders = $this->getNamespaceAutoloaders($ns);
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array_unshift($autoloaders, $callback);
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$this->_setNamespaceAutoloaders($autoloaders, $ns);
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}
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return $this;
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}
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/**
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* Append an autoloader to the autoloader stack
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*
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* @param object|array|string $callback PHP callback or Zend_Loader_Autoloader_Interface implementation
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* @param string|array $namespace Specific namespace(s) under which to register callback
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* @return Zend_Loader_Autoloader
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*/
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public function pushAutoloader($callback, $namespace = '')
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{
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$autoloaders = $this->getAutoloaders();
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array_push($autoloaders, $callback);
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$this->setAutoloaders($autoloaders);
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$namespace = (array) $namespace;
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foreach ($namespace as $ns) {
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||
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$autoloaders = $this->getNamespaceAutoloaders($ns);
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array_push($autoloaders, $callback);
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||
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$this->_setNamespaceAutoloaders($autoloaders, $ns);
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||
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}
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|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Remove an autoloader from the autoloader stack
|
||
|
|
*
|
||
|
|
* @param object|array|string $callback PHP callback or Zend_Loader_Autoloader_Interface implementation
|
||
|
|
* @param null|string|array $namespace Specific namespace(s) from which to remove autoloader
|
||
|
|
* @return Zend_Loader_Autoloader
|
||
|
|
*/
|
||
|
|
public function removeAutoloader($callback, $namespace = null)
|
||
|
|
{
|
||
|
|
if (null === $namespace) {
|
||
|
|
$autoloaders = $this->getAutoloaders();
|
||
|
|
if (false !== ($index = array_search($callback, $autoloaders, true))) {
|
||
|
|
unset($autoloaders[$index]);
|
||
|
|
$this->setAutoloaders($autoloaders);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($this->_namespaceAutoloaders as $ns => $autoloaders) {
|
||
|
|
if (false !== ($index = array_search($callback, $autoloaders, true))) {
|
||
|
|
unset($autoloaders[$index]);
|
||
|
|
$this->_setNamespaceAutoloaders($autoloaders, $ns);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$namespace = (array) $namespace;
|
||
|
|
foreach ($namespace as $ns) {
|
||
|
|
$autoloaders = $this->getNamespaceAutoloaders($ns);
|
||
|
|
if (false !== ($index = array_search($callback, $autoloaders, true))) {
|
||
|
|
unset($autoloaders[$index]);
|
||
|
|
$this->_setNamespaceAutoloaders($autoloaders, $ns);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Constructor
|
||
|
|
*
|
||
|
|
* Registers instance with spl_autoload stack
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function __construct()
|
||
|
|
{
|
||
|
|
spl_autoload_register(array(__CLASS__, 'autoload'));
|
||
|
|
$this->_internalAutoloader = array($this, '_autoload');
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Internal autoloader implementation
|
||
|
|
*
|
||
|
|
* @param string $class
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _autoload($class)
|
||
|
|
{
|
||
|
|
$callback = $this->getDefaultAutoloader();
|
||
|
|
try {
|
||
|
|
if ($this->suppressNotFoundWarnings()) {
|
||
|
|
@call_user_func($callback, $class);
|
||
|
|
} else {
|
||
|
|
call_user_func($callback, $class);
|
||
|
|
}
|
||
|
|
return $class;
|
||
|
|
} catch (Zend_Exception $e) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set autoloaders for a specific namespace
|
||
|
|
*
|
||
|
|
* @param array $autoloaders
|
||
|
|
* @param string $namespace
|
||
|
|
* @return Zend_Loader_Autoloader
|
||
|
|
*/
|
||
|
|
protected function _setNamespaceAutoloaders(array $autoloaders, $namespace = '')
|
||
|
|
{
|
||
|
|
$namespace = (string) $namespace;
|
||
|
|
$this->_namespaceAutoloaders[$namespace] = $autoloaders;
|
||
|
|
return $this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieve the filesystem path for the requested ZF version
|
||
|
|
*
|
||
|
|
* @param string $path
|
||
|
|
* @param string $version
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function _getVersionPath($path, $version)
|
||
|
|
{
|
||
|
|
$type = $this->_getVersionType($version);
|
||
|
|
|
||
|
|
if ($type == 'latest') {
|
||
|
|
$version = 'latest';
|
||
|
|
}
|
||
|
|
|
||
|
|
$availableVersions = $this->_getAvailableVersions($path, $version);
|
||
|
|
if (empty($availableVersions)) {
|
||
|
|
throw new Zend_Loader_Exception('No valid ZF installations discovered');
|
||
|
|
}
|
||
|
|
|
||
|
|
$matchedVersion = array_pop($availableVersions);
|
||
|
|
return $matchedVersion;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieve the ZF version type
|
||
|
|
*
|
||
|
|
* @param string $version
|
||
|
|
* @return string "latest", "major", "minor", or "specific"
|
||
|
|
* @throws Zend_Loader_Exception if version string contains too many dots
|
||
|
|
*/
|
||
|
|
protected function _getVersionType($version)
|
||
|
|
{
|
||
|
|
if (strtolower($version) == 'latest') {
|
||
|
|
return 'latest';
|
||
|
|
}
|
||
|
|
|
||
|
|
$parts = explode('.', $version);
|
||
|
|
$count = count($parts);
|
||
|
|
if (1 == $count) {
|
||
|
|
return 'major';
|
||
|
|
}
|
||
|
|
if (2 == $count) {
|
||
|
|
return 'minor';
|
||
|
|
}
|
||
|
|
if (3 < $count) {
|
||
|
|
throw new Zend_Loader_Exception('Invalid version string provided');
|
||
|
|
}
|
||
|
|
return 'specific';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get available versions for the version type requested
|
||
|
|
*
|
||
|
|
* @param string $path
|
||
|
|
* @param string $version
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
protected function _getAvailableVersions($path, $version)
|
||
|
|
{
|
||
|
|
if (!is_dir($path)) {
|
||
|
|
throw new Zend_Loader_Exception('Invalid ZF path provided');
|
||
|
|
}
|
||
|
|
|
||
|
|
$path = rtrim($path, '/');
|
||
|
|
$path = rtrim($path, '\\');
|
||
|
|
$versionLen = strlen($version);
|
||
|
|
$versions = array();
|
||
|
|
$dirs = glob("$path/*", GLOB_ONLYDIR);
|
||
|
|
foreach ($dirs as $dir) {
|
||
|
|
$dirName = substr($dir, strlen($path) + 1);
|
||
|
|
if (!preg_match('/^(?:ZendFramework-)?(\d+\.\d+\.\d+((a|b|pl|pr|p|rc)\d+)?)(?:-minimal)?$/i', $dirName, $matches)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$matchedVersion = $matches[1];
|
||
|
|
|
||
|
|
if (('latest' == $version)
|
||
|
|
|| ((strlen($matchedVersion) >= $versionLen)
|
||
|
|
&& (0 === strpos($matchedVersion, $version)))
|
||
|
|
) {
|
||
|
|
$versions[$matchedVersion] = $dir . '/library';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uksort($versions, 'version_compare');
|
||
|
|
return $versions;
|
||
|
|
}
|
||
|
|
}
|