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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* 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 license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Loader
* @subpackage PluginLoader
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: PluginLoader.php 18951 2009-11-12 16:26:19Z alexander $
*/
/** Zend_Loader_PluginLoader_Interface */
require_once 'Zend/Loader/PluginLoader/Interface.php';
/** Zend_Loader */
require_once 'Zend/Loader.php';
/**
* Generic plugin class loader
*
* @category Zend
* @package Zend_Loader
* @subpackage PluginLoader
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Loader_PluginLoader implements Zend_Loader_PluginLoader_Interface
{
/**
* Class map cache file
* @var string
*/
protected static $_includeFileCache;
/**
* Instance loaded plugin paths
*
* @var array
*/
protected $_loadedPluginPaths = array();
/**
* Instance loaded plugins
*
* @var array
*/
protected $_loadedPlugins = array();
/**
* Instance registry property
*
* @var array
*/
protected $_prefixToPaths = array();
/**
* Statically loaded plugin path mappings
*
* @var array
*/
protected static $_staticLoadedPluginPaths = array();
/**
* Statically loaded plugins
*
* @var array
*/
protected static $_staticLoadedPlugins = array();
/**
* Static registry property
*
* @var array
*/
protected static $_staticPrefixToPaths = array();
/**
* Whether to use a statically named registry for loading plugins
*
* @var string|null
*/
protected $_useStaticRegistry = null;
/**
* Constructor
*
* @param array $prefixToPaths
* @param string $staticRegistryName OPTIONAL
*/
public function __construct(Array $prefixToPaths = array(), $staticRegistryName = null)
{
if (is_string($staticRegistryName) && !empty($staticRegistryName)) {
$this->_useStaticRegistry = $staticRegistryName;
if(!isset(self::$_staticPrefixToPaths[$staticRegistryName])) {
self::$_staticPrefixToPaths[$staticRegistryName] = array();
}
if(!isset(self::$_staticLoadedPlugins[$staticRegistryName])) {
self::$_staticLoadedPlugins[$staticRegistryName] = array();
}
}
foreach ($prefixToPaths as $prefix => $path) {
$this->addPrefixPath($prefix, $path);
}
}
/**
* Format prefix for internal use
*
* @param string $prefix
* @return string
*/
protected function _formatPrefix($prefix)
{
if($prefix == "") {
return $prefix;
}
return rtrim($prefix, '_') . '_';
}
/**
* Add prefixed paths to the registry of paths
*
* @param string $prefix
* @param string $path
* @return Zend_Loader_PluginLoader
*/
public function addPrefixPath($prefix, $path)
{
if (!is_string($prefix) || !is_string($path)) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Zend_Loader_PluginLoader::addPrefixPath() method only takes strings for prefix and path.');
}
$prefix = $this->_formatPrefix($prefix);
$path = rtrim($path, '/\\') . '/';
if ($this->_useStaticRegistry) {
self::$_staticPrefixToPaths[$this->_useStaticRegistry][$prefix][] = $path;
} else {
if (!isset($this->_prefixToPaths[$prefix])) {
$this->_prefixToPaths[$prefix] = array();
}
if (!in_array($path, $this->_prefixToPaths[$prefix])) {
$this->_prefixToPaths[$prefix][] = $path;
}
}
return $this;
}
/**
* Get path stack
*
* @param string $prefix
* @return false|array False if prefix does not exist, array otherwise
*/
public function getPaths($prefix = null)
{
if ((null !== $prefix) && is_string($prefix)) {
$prefix = $this->_formatPrefix($prefix);
if ($this->_useStaticRegistry) {
if (isset(self::$_staticPrefixToPaths[$this->_useStaticRegistry][$prefix])) {
return self::$_staticPrefixToPaths[$this->_useStaticRegistry][$prefix];
}
return false;
}
if (isset($this->_prefixToPaths[$prefix])) {
return $this->_prefixToPaths[$prefix];
}
return false;
}
if ($this->_useStaticRegistry) {
return self::$_staticPrefixToPaths[$this->_useStaticRegistry];
}
return $this->_prefixToPaths;
}
/**
* Clear path stack
*
* @param string $prefix
* @return bool False only if $prefix does not exist
*/
public function clearPaths($prefix = null)
{
if ((null !== $prefix) && is_string($prefix)) {
$prefix = $this->_formatPrefix($prefix);
if ($this->_useStaticRegistry) {
if (isset(self::$_staticPrefixToPaths[$this->_useStaticRegistry][$prefix])) {
unset(self::$_staticPrefixToPaths[$this->_useStaticRegistry][$prefix]);
return true;
}
return false;
}
if (isset($this->_prefixToPaths[$prefix])) {
unset($this->_prefixToPaths[$prefix]);
return true;
}
return false;
}
if ($this->_useStaticRegistry) {
self::$_staticPrefixToPaths[$this->_useStaticRegistry] = array();
} else {
$this->_prefixToPaths = array();
}
return true;
}
/**
* Remove a prefix (or prefixed-path) from the registry
*
* @param string $prefix
* @param string $path OPTIONAL
* @return Zend_Loader_PluginLoader
*/
public function removePrefixPath($prefix, $path = null)
{
$prefix = $this->_formatPrefix($prefix);
if ($this->_useStaticRegistry) {
$registry =& self::$_staticPrefixToPaths[$this->_useStaticRegistry];
} else {
$registry =& $this->_prefixToPaths;
}
if (!isset($registry[$prefix])) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Prefix ' . $prefix . ' was not found in the PluginLoader.');
}
if ($path != null) {
$pos = array_search($path, $registry[$prefix]);
if ($pos === null) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Prefix ' . $prefix . ' / Path ' . $path . ' was not found in the PluginLoader.');
}
unset($registry[$prefix][$pos]);
} else {
unset($registry[$prefix]);
}
return $this;
}
/**
* Normalize plugin name
*
* @param string $name
* @return string
*/
protected function _formatName($name)
{
return ucfirst((string) $name);
}
/**
* Whether or not a Plugin by a specific name is loaded
*
* @param string $name
* @return Zend_Loader_PluginLoader
*/
public function isLoaded($name)
{
$name = $this->_formatName($name);
if ($this->_useStaticRegistry) {
return isset(self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name]);
}
return isset($this->_loadedPlugins[$name]);
}
/**
* Return full class name for a named plugin
*
* @param string $name
* @return string|false False if class not found, class name otherwise
*/
public function getClassName($name)
{
$name = $this->_formatName($name);
if ($this->_useStaticRegistry
&& isset(self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name])
) {
return self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name];
} elseif (isset($this->_loadedPlugins[$name])) {
return $this->_loadedPlugins[$name];
}
return false;
}
/**
* Get path to plugin class
*
* @param mixed $name
* @return string|false False if not found
*/
public function getClassPath($name)
{
$name = $this->_formatName($name);
if ($this->_useStaticRegistry
&& !empty(self::$_staticLoadedPluginPaths[$this->_useStaticRegistry][$name])
) {
return self::$_staticLoadedPluginPaths[$this->_useStaticRegistry][$name];
} elseif (!empty($this->_loadedPluginPaths[$name])) {
return $this->_loadedPluginPaths[$name];
}
if ($this->isLoaded($name)) {
$class = $this->getClassName($name);
$r = new ReflectionClass($class);
$path = $r->getFileName();
if ($this->_useStaticRegistry) {
self::$_staticLoadedPluginPaths[$this->_useStaticRegistry][$name] = $path;
} else {
$this->_loadedPluginPaths[$name] = $path;
}
return $path;
}
return false;
}
/**
* Load a plugin via the name provided
*
* @param string $name
* @param bool $throwExceptions Whether or not to throw exceptions if the
* class is not resolved
* @return string|false Class name of loaded class; false if $throwExceptions
* if false and no class found
* @throws Zend_Loader_Exception if class not found
*/
public function load($name, $throwExceptions = true)
{
$name = $this->_formatName($name);
if ($this->isLoaded($name)) {
return $this->getClassName($name);
}
if ($this->_useStaticRegistry) {
$registry = self::$_staticPrefixToPaths[$this->_useStaticRegistry];
} else {
$registry = $this->_prefixToPaths;
}
$registry = array_reverse($registry, true);
$found = false;
$classFile = str_replace('_', DIRECTORY_SEPARATOR, $name) . '.php';
$incFile = self::getIncludeFileCache();
foreach ($registry as $prefix => $paths) {
$className = $prefix . $name;
if (class_exists($className, false)) {
$found = true;
break;
}
$paths = array_reverse($paths, true);
foreach ($paths as $path) {
$loadFile = $path . $classFile;
if (Zend_Loader::isReadable($loadFile)) {
include_once $loadFile;
if (class_exists($className, false)) {
if (null !== $incFile) {
self::_appendIncFile($loadFile);
}
$found = true;
break 2;
}
}
}
}
if (!$found) {
if (!$throwExceptions) {
return false;
}
$message = "Plugin by name '$name' was not found in the registry; used paths:";
foreach ($registry as $prefix => $paths) {
$message .= "\n$prefix: " . implode(PATH_SEPARATOR, $paths);
}
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception($message);
}
if ($this->_useStaticRegistry) {
self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name] = $className;
self::$_staticLoadedPluginPaths[$this->_useStaticRegistry][$name] = (isset($loadFile) ? $loadFile : '');
} else {
$this->_loadedPlugins[$name] = $className;
$this->_loadedPluginPaths[$name] = (isset($loadFile) ? $loadFile : '');
}
return $className;
}
/**
* Set path to class file cache
*
* Specify a path to a file that will add include_once statements for each
* plugin class loaded. This is an opt-in feature for performance purposes.
*
* @param string $file
* @return void
* @throws Zend_Loader_PluginLoader_Exception if file is not writeable or path does not exist
*/
public static function setIncludeFileCache($file)
{
if (null === $file) {
self::$_includeFileCache = null;
return;
}
if (!file_exists($file) && !file_exists(dirname($file))) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Specified file does not exist and/or directory does not exist (' . $file . ')');
}
if (file_exists($file) && !is_writable($file)) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Specified file is not writeable (' . $file . ')');
}
if (!file_exists($file) && file_exists(dirname($file)) && !is_writable(dirname($file))) {
require_once 'Zend/Loader/PluginLoader/Exception.php';
throw new Zend_Loader_PluginLoader_Exception('Specified file is not writeable (' . $file . ')');
}
self::$_includeFileCache = $file;
}
/**
* Retrieve class file cache path
*
* @return string|null
*/
public static function getIncludeFileCache()
{
return self::$_includeFileCache;
}
/**
* Append an include_once statement to the class file cache
*
* @param string $incFile
* @return void
*/
protected static function _appendIncFile($incFile)
{
if (!file_exists(self::$_includeFileCache)) {
$file = '<?php';
} else {
$file = file_get_contents(self::$_includeFileCache);
}
if (!strstr($file, $incFile)) {
$file .= "\ninclude_once '$incFile';";
file_put_contents(self::$_includeFileCache, $file);
}
}
}
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