Spring Custom User Details from DAL - Casting

Question

I'm currently working on a System that makes use of Spring Security. I have the Authentication Provider setup but I'm having a problem creating a custom User Type which would store all the information I need.

In the Authentication Provider, I call a "User Service" which is a DAL to the users in the system. This then returns a "User" object. Which is fine and that's all working.

But I then have a MyCompanyUserDetails object defined which contains all the custom attributes I need. This Class extends the "User" class.

My Problem is I can't cast the User to CompanyUserDetails. Am I missing something here ?

The Custom User Details Type:

public class MyCompanyUserDetails extends User {

and in my Authentication Provider:

// Create / Update the user.
User raw_user_details = getUser(username_str, groups_of_user);

// Create our Custom user object filled with the parameters we need for the rest of the system.
MyCompanyUserDetails details = (MyCompanyUserDetails) raw_user_details;

The exception I receive:

java.lang.ClassCastException: User cannot be cast to MyCompanyUserDetails

Any help / guidance would be appreciated...

Answer 1

Was a simple DownCasting Problem as Stated by Shades88 in the Comments