[TYPO3-mvc] Own Domain Model Validator - whats the right way as of 1.4.1?

[Tim Schoch | GSTALTIG]

Hello List

I'm a little lost here and need some help about what's the «right» way to validate a domain model.

Current state: 
I have an Domain Model that needs it's custom Validator. My first guess was to take a look at the 
GenericObjectValidator to see how its done, but seeing as it extends a depreciated class I wonder what 
would be the right was as of 1.4.1 to do this.
Am I right when I extend the GenericObjectValidator, overriding the validate() and canValidate() methods?

Also, I wonder what's the best practice for the error handling inside my validator? I would return general 
errors (eg. wrong Class passed) like this. (as in the genericObjectValidator)
$messages = new Tx_Extbase_Error_Result();
$messages->addError(new Tx_Extbase_Validation_Error('Object expected, ' . gettype($object) . ' given.', 1241099149));
return $messages;

But how do I handle Property Errors? I validate them inside the DomainModelValidator and would like to 
be able to use them with the new fluid error viewhelpers.

Any hint is very appreciated.

Tim