Doctrine annotation loader fails - php

Question

I'm trying to run JMSSerializer. My simple code
use JMS\Serializer\Annotation\Type;
class Comment
{
private $msg;
public function __construct($msg)
{
$this->msg = $msg;
}
}
class Person
{
/**
* #Type("array<Comment>")
*/
private $commentList;
public function addComment(Comment $comment)
{
$this->commentList[] = $comment;
}
}
$type = new Type;
$serializer = JMS\Serializer\SerializerBuilder::create()->build();
$data = new Person();
$data->addComment(new Comment('hey'));
var_dump($serializer->serialize($data, 'json'));
fails with
PHP Fatal error: Uncaught exception 'Doctrine\Common\Annotations\AnnotationException' with message '[Semantical Error] The annotation "#JMS\Serializer\Annotation\Type" in property Person::$commentList does not exist, or could not be auto-loaded.' in xxx.php:52
OK, but if I add line
$type = new Type;
to trigger autoloader manually, it works:
string(32) "{"comment_list":[{"msg":"hey"}]}"
As I see AnnotationRegistry doesn't use autoloader, it tries to use some own autoloader. It looks ugly, what do I have to do to fix it?

Answer 1

OK, I answer my question myself. I have to register annotations somewhere in autoloader file:
\Doctrine\Common\Annotations\AnnotationRegistry::registerAutoloadNamespace(
'JMS\Serializer\Annotation', __DIR__.'/vendor/jms/serializer/src'
);
Other ways: http://docs.doctrine-project.org/projects/doctrine-common/en/latest/reference/annotations.html#registering-annotations

Answer 2

A full configuration sample for the standalone JMS serializer library could be:
<?php
namespace iMSCP\Service;
use JMS\Serializer\Serializer;
use JMS\Serializer\SerializerBuilder;
use Doctrine\Common\Annotations\AnnotationRegistry;
use iMSCP_Registry as Registry;
/**
* Class SerializerServiceFactory
* #package iMSCP\Service
*/
class SerializerServiceFactory
{
/**
* #var Serializer
*/
static $serialiszer;
public static function create()
{
if (static::$serialiszer === null) {
$config = Registry::get('config');
AnnotationRegistry::registerAutoloadNamespace(
'JMS\Serializer\Annotation', $config['CACHE_DATA_DIR'] . '/packages/vendor/jms/serializer/src'
);
static::$serialiszer = SerializerBuilder::create()
->setCacheDir(CACHE_PATH . '/serializer')
->setDebug($config['DEVMODE'])
->build();
}
return static::$serialiszer;
}
}
Here, I register the JMS\Serializer\Annotation namespace using the Annotation registry as provided by Doctrine. Once done, all is working as expected.