ObjectRouteLoader.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\Config\Loader\Loader;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Routing\RouteCollection;
/**
* A route loader that calls a method on an object to load the routes.
*
* @author Ryan Weaver <ryan@knpuniversity.com>
*/
abstract class ObjectRouteLoader extends Loader
{
/**
* Returns the object that the method will be called on to load routes.
*
* For example, if your application uses a service container,
* the $id may be a service id.
*
* @param string $id
*
* @return object
*/
abstract protected function getServiceObject($id);
/**
* Calls the service that will load the routes.
*
* @param mixed $resource Some value that will resolve to a callable
* @param string|null $type The resource type
*
* @return RouteCollection
*/
public function load($resource, $type = null)
{
$parts = explode(':', $resource);
if (count($parts) != 2) {
throw new \InvalidArgumentException(sprintf('Invalid resource "%s" passed to the "service" route loader: use the format "service_name:methodName"', $resource));
}
$serviceString = $parts[0];
$method = $parts[1];
$loaderObject = $this->getServiceObject($serviceString);
if (!is_object($loaderObject)) {
throw new \LogicException(sprintf('%s:getServiceObject() must return an object: %s returned', get_class($this), gettype($loaderObject)));
}
if (!method_exists($loaderObject, $method)) {
throw new \BadMethodCallException(sprintf('Method "%s" not found on "%s" when importing routing resource "%s"', $method, get_class($loaderObject), $resource));
}
$routeCollection = call_user_func(array($loaderObject, $method), $this);
if (!$routeCollection instanceof RouteCollection) {
$type = is_object($routeCollection) ? get_class($routeCollection) : gettype($routeCollection);
throw new \LogicException(sprintf('The %s::%s method must return a RouteCollection: %s returned', get_class($loaderObject), $method, $type));
}
// make the service file tracked so that if it changes, the cache rebuilds
$this->addClassResource(new \ReflectionClass($loaderObject), $routeCollection);
return $routeCollection;
}
/**
* {@inheritdoc}
*/
public function supports($resource, $type = null)
{
return 'service' === $type;
}
private function addClassResource(\ReflectionClass $class, RouteCollection $collection)
{
do {
if (is_file($class->getFileName())) {
$collection->addResource(new FileResource($class->getFileName()));
}
} while ($class = $class->getParentClass());
}
}