How to check if a class is a Doctrine entity?

Question

Given a class name, say Domain\Model\User, is there a programmatic way to know whether this class is marked as a Doctrine entity?

I could check for the presence of the @Entity annotation, but I'm looking for a generic way that would work with any metadata driver (annotations, YAML, XML, etc.)

Answer 1

As an addition to Benjamin his answer...
If you know for sure that you are handling doctrine entities, but you are not sure whether you have a proxy or a instance of the real class you can easily retrieve the real class by using the Doctrine Common ClassUtils:

use Doctrine\Common\Util\ClassUtils;

and then you can get the real class through the static getClass method like this:

$proxyOrEntity;

$className = ClassUtils::getClass($proxyOrEntity);

So this means @Benjamin his isEntity function can be written like this:

/**
 * @param EntityManager $em
 * @param string|object $class
 *
 * @return boolean
 */
function isEntity(EntityManager $em, $class)
{
    if(is_object($class)){
        $class = ClassUtils::getClass($class);
    }
    return ! $em->getMetadataFactory()->isTransient($class);
}

Which will give you true/false depending on whether the class is a doctrine entity or not.

Answer 2

One work around would be to test if you can generate a Repository. This is 'bullet proof' in that it will fail if the current schema and mapping does not know about the object class in question.

// Get the entity manager. I don't know how you do it
$em = new Doctrine\ORM\EntityManager();

try {
    $repo = $em->getRepository('YourClassModel');
} catch (Doctrine\Common\Persistence\Mapping\MappingException $e) {
    // NOPE! Not a mapped model
}