public function delete($con = null)
{
try {
$con = Propel::getConnection();
$con->begin();
//deletes generic document
$genericDocument = Document::getGenericDocument($this);
$genericDocument->delete();
parent::delete();
Document::deleteObjCache($this);
$con->commit();
return true;
} catch (Exception $e) {
$con->rollback();
throw $e;
}
}