Possible Entity / Mapper architecture

gistfile1.aw

<?php
class AccountData
{
	private
		$_data = array(),
		$_fields = array(
			'active' => array(
				'default' => false
			),
			'email' => array(),
			'password' => array(),
			'salt' => array(),
			'validated' => array(
				'default' => false
			),
		);
		
	public function __construct(array $data=array())
	{
		foreach($this->_fields as $field => $meta) {
			if(isset($data[$field])) {
				$this->set($field,$data[$field]);
			}elseif(isset($meta['default'])) {
				$this->set($field,$meta['default']);
			}
		}
	}
	
	public function __get($field)
	{
		return $this->get($field);
	}
	
	public function __set($field,$val)
	{
		$this->set($field,$val);
	}
	
	public function get($field)
	{
		if(!isset($this->_fields[$field])) {
			// DO EXCEPTION
			return false;
		}
		return isset($this->_data[$field]) ? $this->_data[$field] : null;
	}

	public function set($field,$val)
	{
		if(!isset($this->_fields[$field])) {
			// DO EXCEPTION
			return false;
		}
		$this->_data[$field] = $val;
		return $this;
	}
}


class AccountEntity
{
	private	
		$_data,
		$_id;
		
	public function __construct($id,AccountData $data)
	{
		$this->_id = $id;
		$this->_data = $data;
	}

	public function active()
	{
		return $this->_data->get('active');
	}
	
	public function data()
	{
		return $this->_data;
	}
	
	public function email()
	{
		return $this->_data->get('email');
	}
	
	public function hash($str) {
		return hash('sha256',$this->salt().$str); 
	}
	
	public function id()
	{
		return $this->_id;
	}
}
?>