AnnotationFileLoader.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Routing\Loader;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Config\Loader\FileLoader;
use Symfony\Component\Config\FileLocatorInterface;
/**
* AnnotationFileLoader loads routing information from annotations set
* on a PHP class and its methods.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class AnnotationFileLoader extends FileLoader
{
protected $loader;
/**
* Constructor.
*
* @param FileLocatorInterface $locator A FileLocator instance
* @param AnnotationClassLoader $loader An AnnotationClassLoader instance
*
* @throws \RuntimeException
*/
public function __construct(FileLocatorInterface $locator, AnnotationClassLoader $loader)
{
if (!function_exists('token_get_all')) {
throw new \RuntimeException('The Tokenizer extension is required for the routing annotation loaders.');
}
parent::__construct($locator);
$this->loader = $loader;
}
/**
* Loads from annotations from a file.
*
* @param string $file A PHP file path
* @param string|null $type The resource type
*
* @return RouteCollection A RouteCollection instance
*
* @throws \InvalidArgumentException When the file does not exist or its routes cannot be parsed
*/
public function load($file, $type = null)
{
$path = $this->locator->locate($file);
$collection = new RouteCollection();
if ($class = $this->findClass($path)) {
$collection->addResource(new FileResource($path));
$collection->addCollection($this->loader->load($class, $type));
}
if (PHP_VERSION_ID >= 70000) {
// PHP 7 memory manager will not release after token_get_all(), see https://bugs.php.net/70098
gc_mem_caches();
}
return $collection;
}
/**
* {@inheritdoc}
*/
public function supports($resource, $type = null)
{
return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'annotation' === $type);
}
/**
* Returns the full class name for the first class in the file.
*
* @param string $file A PHP file path
*
* @return string|false Full class name if found, false otherwise
*/
protected function findClass($file)
{
$class = false;
$namespace = false;
$tokens = token_get_all(file_get_contents($file));
for ($i = 0; isset($tokens[$i]); ++$i) {
$token = $tokens[$i];
if (!isset($token[1])) {
continue;
}
if (true === $class && T_STRING === $token[0]) {
return $namespace.'\\'.$token[1];
}
if (true === $namespace && T_STRING === $token[0]) {
$namespace = $token[1];
while (isset($tokens[++$i][1]) && in_array($tokens[$i][0], array(T_NS_SEPARATOR, T_STRING))) {
$namespace .= $tokens[$i][1];
}
$token = $tokens[$i];
}
if (T_CLASS === $token[0]) {
// Skip usage of ::class constant
$isClassConstant = false;
for ($j = $i - 1; $j > 0; --$j) {
if (!isset($tokens[$j][1])) {
break;
}
if (T_DOUBLE_COLON === $tokens[$j][0]) {
$isClassConstant = true;
break;
} elseif (!in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
break;
}
}
if (!$isClassConstant) {
$class = true;
}
}
if (T_NAMESPACE === $token[0]) {
$namespace = true;
}
}
return false;
}
}