Order 2

Order.sol

contract Order implements DataStorageInterface{
	function Order(){
		//a private function only accessible internally
		this._setValue('address', 'owner', msg.sender)
		this._setValue('uint', 'timestamp', now)
	}

	function setValue(valueType,valueVar,value){ //a public function anyone can call
		var owner = this._getValue('address', 'owner');
		
		if(msg.sender != owner) throw;

		//dont allow the timestamp to be updated
		if(valueVar == 'timestamp') throw;

	}
}