Kohana之异常编写

<?php defined('SYSPATH') or die('No direct script access.');

class Exception_Test extends Kohana_Exception {
        
}

<?php defined('SYSPATH') or die('No direct script access.');
class Model_Test extends Model{
        public function __construct($db=null){
                parent::__construct($db);
        }
        public function test(){
                throw new Exception_Test("test model exp in class :class",array(":class"=>get_class($this)));
        }
}

<?php
$test=Model::factory("test");
try{
        $test->test();
}catch(Exception_Test $e){
        echo $e->getMessage();
}