org.musicontroller.service
Interface UserService

All Known Implementing Classes:

UserServiceImpl

public interface UserService

Defines operations on Users.

Author:

Varienaja

Method Summary

void	addUser(IUser user) Persists a new User-object in the database.
IUser	getUserById(long id) Returns the User that was persisted under the ID given.
java.util.List<Role>	listRoles() Queries the database for a list of all Roles.
java.util.List<IUser>	listUsers() Queries the database for a list of all users.
void	saveUser(IUser user) Saves changs to an existing user.

Method Detail

getUserById

IUser getUserById(long id)

Returns the User that was persisted under the ID given.

Parameters:

id - The Id

Returns:

The User with that id, or null if there was no such user.

addUser

void addUser(IUser user)
             throws java.lang.Exception

Persists a new User-object in the database.

Parameters:

user - The new User

Throws:

java.lang.Exception - when the User's loginname is not unique.

saveUser

void saveUser(IUser user)

Saves changs to an existing user.

Parameters:

user - The changed user.

listUsers

java.util.List<IUser> listUsers()

Queries the database for a list of all users. The list returned is sorted by loginname.

Returns:

A list of users, sorted on loginname.

listRoles

java.util.List<Role> listRoles()

Queries the database for a list of all Roles.

Returns:

A list or roles.