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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Loader;
use Traversable;
// Grab SplAutoloader interface
require_once __DIR__ . '/SplAutoloader.php';
/**
* Class-map autoloader
*
* Utilizes class-map files to lookup classfile locations.
*/
class ClassMapAutoloader implements SplAutoloader
{
/**
* Registry of map files that have already been loaded
* @var array
*/
protected $mapsLoaded = array();
/**
* Class name/filename map
* @var array
*/
protected $map = array();
/**
* Constructor
*
* Create a new instance, and optionally configure the autoloader.
*
* @param null|array|Traversable $options
*/
public function __construct($options = null)
{
if (null !== $options) {
$this->setOptions($options);
}
}
/**
* Configure the autoloader
*
* Proxies to {@link registerAutoloadMaps()}.
*
* @param array|Traversable $options
* @return ClassMapAutoloader
*/
public function setOptions($options)
{
$this->registerAutoloadMaps($options);
return $this;
}
/**
* Register an autoload map
*
* An autoload map may be either an associative array, or a file returning
* an associative array.
*
* An autoload map should be an associative array containing
* classname/file pairs.
*
* @param string|array $map
* @throws Exception\InvalidArgumentException
* @return ClassMapAutoloader
*/
public function registerAutoloadMap($map)
{
if (is_string($map)) {
$location = $map;
if ($this === ($map = $this->loadMapFromFile($location))) {
return $this;
}
}
if (!is_array($map)) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException(sprintf(
'Map file provided does not return a map. Map file: "%s"',
(isset($location) && is_string($location) ? $location : 'unexpected type: ' . gettype($map))
));
}
$this->map = array_merge($this->map, $map);
if (isset($location)) {
$this->mapsLoaded[] = $location;
}
return $this;
}
/**
* Register many autoload maps at once
*
* @param array $locations
* @throws Exception\InvalidArgumentException
* @return ClassMapAutoloader
*/
public function registerAutoloadMaps($locations)
{
if (!is_array($locations) && !($locations instanceof Traversable)) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException('Map list must be an array or implement Traversable');
}
foreach ($locations as $location) {
$this->registerAutoloadMap($location);
}
return $this;
}
/**
* Retrieve current autoload map
*
* @return array
*/
public function getAutoloadMap()
{
return $this->map;
}
/**
* {@inheritDoc}
*/
public function autoload($class)
{
if (isset($this->map[$class])) {
require_once $this->map[$class];
return $class;
}
return false;
}
/**
* Register the autoloader with spl_autoload registry
*
* @return void
*/
public function register()
{
spl_autoload_register(array($this, 'autoload'), true, true);
}
/**
* Load a map from a file
*
* If the map has been previously loaded, returns the current instance;
* otherwise, returns whatever was returned by calling include() on the
* location.
*
* @param string $location
* @return ClassMapAutoloader|mixed
* @throws Exception\InvalidArgumentException for nonexistent locations
*/
protected function loadMapFromFile($location)
{
if (!file_exists($location)) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException(sprintf(
'Map file provided does not exist. Map file: "%s"',
(is_string($location) ? $location : 'unexpected type: ' . gettype($location))
));
}
if (!$path = static::realPharPath($location)) {
$path = realpath($location);
}
if (in_array($path, $this->mapsLoaded)) {
// Already loaded this map
return $this;
}
$map = include $path;
return $map;
}
/**
* Resolve the real_path() to a file within a phar.
*
* @see https://bugs.php.net/bug.php?id=52769
* @param string $path
* @return string
*/
public static function realPharPath($path)
{
if (!preg_match('|^phar:(/{2,3})|', $path, $match)) {
return;
}
$prefixLength = 5 + strlen($match[1]);
$parts = explode('/', str_replace(array('/', '\\'), '/', substr($path, $prefixLength)));
$parts = array_values(array_filter($parts, function ($p) {
return ($p !== '' && $p !== '.');
}));
array_walk($parts, function ($value, $key) use (&$parts) {
if ($value === '..') {
unset($parts[$key], $parts[$key-1]);
$parts = array_values($parts);
}
});
if (file_exists($realPath = str_pad('phar:', $prefixLength, '/') . implode('/', $parts))) {
return $realPath;
}
}
}