DTD/XSD Schema Generation and Validation

[beberlei]

This was a requested feature on Symfony Live, using the Metadata from JMS it is possible to create an XSD Schema.

Also It would be great to provide a way to validate againt an XSD schema during the deserialization process from XML.

[schmittjoh]

I hope you suggested him to send a pull request :)

[wjaspers]

How would you handle enumerated values?

Duplicating something like a class of nothing but constants in an annotation seems like it could be a maintenance problem.

How would you handle optional values? How would you handle structural depth?

Its not that I don't like the idea, in-fact it has actually piqued my interest. But, in the interest of flexibility, it seems like a very complicated problem.

For instance:

/**
 *
 */
class GroupRestriction {
  const PUBLIC_GROUP = "PUBLIC";
  const PRIVATE_GROUP = "PRIVATE";
  const MEMBERS_ONLY = "MEMBERS ONLY";
}

---

namespace MyBundle\Thingies;
use JMS\Serializer\Annotation as Serializer;
use MyBundle\Constants\GroupRestriction;

/**
 * @Serializer\Xml\Root("thingy", "prefix:", "http://blah.example.com/ns")
 * @Serializer\Xml\Xsd("name", "filepath???")
 */
class Thingy {
   /**
    * @Serializer\Expose
    * @Serializer\SerializedName("groupRestriction")
    * @Serializer\Xml\Enumeration("MyBundle\Constants\GroupRestriction")
    */
   public $groupRestriction = GroupRestriction::MEMBERS_ONLY;

   /**
    * @var SubThingy $subThingy
    * @Serializer\Expose
    * @Serializer\SerializedName("subThing")
    * @Serializer\Xml\AllowedType("SubThingy") ???
    */
  public $subThingy;
}

---

namespace MyBundle\Thingies;
use JMS\Serializer\Annotation as Serializer;
/**
 * @Serializer\XmlRoot("subThing")
 * How does this inherit the document's namespace?
 */
class SubThingy {
  /**
   * @Serializer\Xml\MinOccurs(0)
   * @Serializer\Xml\MaxOccurs(1)
   */
  public $myName = "blah";
}

class AnotherSubThingy extends SubThingy {
}

---

What would happen?

$thingy = new Thingy();
$thingy->subThingy = new AnotherSubThingy();
// Is this any different? Generating this on the fly again and again seems ill-performant.
$xsd = $serializer->serialize($thingy, 'xsd');
// Do I specify the DTD here? The XSD? My xml:ns?
$out = $serializer->serialize($thingy, 'xml', $xsd); 
var_dump($out);

[goetas]

hi! If someone is interested, I'm working on a little tool that generates JMS metadata starting from an XSD definition... https://github.com/goetas/xsd2php#serilize--unserialize

Any suggestion will be helpful :)