Package org.example.dao

Class UserDAO

java.lang.Object

org.example.dao.UserDAO

public class UserDAO
extends Object

Data Access Object for User entities. Manages user authentication and registration.

Constructor Summary

Constructors

Constructor	Description
UserDAO()

Method Summary

Modifier and Type	Method	Description
void	registerUser(String nickname, String password, String email)	Registers a new user in the database.
String	validateUser(String email, String password)	Validates user credentials.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

UserDAO

public UserDAO()

Method Details

validateUser

public String validateUser(String email,
 String password)
                    throws InvalidCredentialsException

Validates user credentials.

Parameters:

email - User's email.

password - User's plain text password.

Returns:

User's nickname if credentials are valid.

Throws:

InvalidCredentialsException - if email or password does not match.

registerUser

public void registerUser(String nickname,
 String password,
 String email)
                  throws UserAlreadyExistsException

Registers a new user in the database.

Parameters:

nickname - Unique username.

password - Plain text password.

email - Unique email address.

Throws:

UserAlreadyExistsException - if nickname or email is already taken.