[PHP5] Validation system richiesta parere ....

[whisher]

Ciao.
Da un articolo di Fabio Sutto ho eleborato questa bozza di codice:

<?php
error_reporting(E_ALL | E_STRICT);
define("IS_REQUIRED", '"%s" è un campo obbligatorio') ;
define('NOT_NUM', '"%s" non contiene un numero valido') ;
class ValidatorFactory{
    public function createValidator($validator,$field,$value){
        if(!class_exists($validator)){
        throw new Exception('Invalid object parameters');
    }
           return new $validator($field,$value);
   }
}
abstract class AbstractValidator{
    public static $error= array();
    abstract function validate();
    public function setError($msg){
        self::$error[]= $msg;
    }
    public static function getErrors(){
        return self::$error;
    }
    public static function getError(){
        return array_shift(self::$error);
    }
    public static function isValid(){
        return !(bool)count(self::$error) ;
      }
}//
class IsEmpty extends AbstractValidator{
    private $value= '';
    private $field= '';
    public function __construct($field,$value){
        $this->field= $field;
        $this->value= $value;
    }
    public function validate(){
        if(empty($this->value)){
            parent::setError(sprintf(IS_REQUIRED, $this->field));
        }
    }
}//
class IsNumeric extends AbstractValidator{
    private $value= '';
    private $field= '';
    public function __construct($field,$value){
        $this->field= $field;
        $this->value= $value;
    }
    public function validate(){
        if(!is_numeric($this->value)){
            parent::setError(sprintf(NOT_NUM, $this->field));
        }
    }
}//
try{
      $valFactory=new ValidatorFactory();
    $valFactory->createValidator('IsEmpty','Username','')->validate();
    $valFactory->createValidator('IsNumeric','Age','xxx')->validate();
    if(AbstractValidator::isValid()){
        //insert data
    }
    else{
        foreach(AbstractValidator::getErrors() as $error)
        {
            echo "

".$error."</p>";
        }
    }
}
catch(Exception $e){
  echo $e->getMessage();
  exit();
}


?>

Che ne pensate suggerimenti ?