com.pow2.user.dao
Class DBUserDAO

java.lang.Object
  com.pow2.dao.AbstractDAO
      com.pow2.user.dao.DBUserDAO

All Implemented Interfaces:

UserDAO

public class DBUserDAO

extends AbstractDAO

implements UserDAO

User Data access object.
Encapsulates data access methods for the User entity.
Extends AbstractDAO, and use the singleton design pattern to provide an unique object instance per vm.

Version:

$Id: DBUserDAO.java,v 1.1.1.1 2004/08/31 20:22:46 foxat Exp $

Author:

Luca Fossato

Field Summary

Fields inherited from class com.pow2.dao.AbstractDAO

cat

Constructor Summary

protected

DBUserDAO() Default private constructor.

Method Summary

void	deleteUser(String id) Delete the User having the input id from the database.
String	getProviderType() Get the data provider type
User	getUser(String login, String passwd) Update the input User object with the user informations retrieved from the data provider.
void	getUser(User user) Update the input User object with the user informations retrieved from the data provider.
protected static DBUserDAO	instance() Get the unique instance of UserDAO class.
boolean	loginExists(String login) Test if the input login property already exists into the application database.
boolean	loginExists(User user) Test if the input user login property already exists into the application database.
void	setUser(User user) Persist the user informations into the database.

Methods inherited from class com.pow2.dao.AbstractDAO

assertion, closeResources, closeResources, closeResources, count, count, delete, delete, encode, getConnection, getConnection, getNewKey, isDebugEnabled, populate, setLike, setLike

Methods inherited from class java.lang.Object

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

Constructor Detail

DBUserDAO

protected DBUserDAO()

Default private constructor.

Method Detail

instance

protected static DBUserDAO instance()

Get the unique instance of UserDAO class.
This method is protected; use UserDAOFactory.getUserDAO() instead.

Returns:

the instance of UserDAO class

getProviderType

public String getProviderType()

Get the data provider type

Specified by:

getProviderType in interface UserDAO

Returns:

the data provider type

getUser

public User getUser(String login,
                    String passwd)
             throws Exception

Update the input User object with the user informations retrieved from the data provider.
This method uses the User login and passwd properties to execute the login procedure.

Specified by:

getUser in interface UserDAO

Parameters:

login - the user login

passwd - the user password

Returns:

the retrieved User object if the login is succesfull; null if login fails

Throws:

Exception - if any error occurs

getUser

public void getUser(User user)
             throws Exception

Update the input User object with the user informations retrieved from the data provider.
This method uses the User login and passwd properties to execute the login procedure.

Specified by:

getUser in interface UserDAO

Parameters:

user - the user object with the login and passwd properties properly set.

Throws:

Exception - if any error occurs

setUser

public void setUser(User user)
             throws Exception

Persist the user informations into the database.
This method updates or insert a new User entry into the database depending on the user id value.

Specified by:

setUser in interface UserDAO

Parameters:

user - the user object to persist into the database

Throws:

Exception - if any error occurs

deleteUser

public void deleteUser(String id)
                throws Exception

Delete the User having the input id from the database.

Specified by:

deleteUser in interface UserDAO

Parameters:

id - the identifier of the user to remove from the database

Throws:

Exception - if any error occurs

loginExists

public boolean loginExists(User user)
                    throws Exception

Test if the input user login property already exists into the application database.

Specified by:

loginExists in interface UserDAO

Parameters:

user - the user object

Returns:

true if the input user login already exists into the application database; false otherwise

Throws:

Exception - if any error occurs

loginExists

public boolean loginExists(String login)
                    throws Exception

Test if the input login property already exists into the application database.

Specified by:

loginExists in interface UserDAO

Parameters:

login - the login string

Returns:

true if the input login already exists into the application database; false otherwise

Throws:

Exception - if any error occurs