/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Exoffice Technologies. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Exoffice Technologies. Exolab is a registered
* trademark of Exoffice Technologies.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2003-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
*/
package org.exolab.jms.persistence;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Vector;
import org.exolab.jms.authentication.User;
/**
* This class provides persistency for Users objects
* in an RDBMS database
*
* @version $Revision: 1.4 $ $Date: 2005/08/31 05:45:50 $
* @author <a href="mailto:knut@lerpold.no">Knut Lerpold</a>
*/
class Users {
/**
* Construct a new <code>Users</code>.
*/
public Users() {
}
/**
* Add a new user to the database.
*
* @param connection - the connection to use.
* @param user - the user to add
* @throws PersistenceException - if the user cannot be added
*/
public synchronized void add(Connection connection,
User user)
throws PersistenceException {
PreparedStatement insert = null;
try {
insert = connection.prepareStatement(
"insert into users values (?, ?)");
insert.setString(1, user.getUsername());
insert.setString(2, user.getPassword());
insert.executeUpdate();
} catch (Exception error) {
throw new PersistenceException("Users.add failed with "
+ error.toString());
} finally {
SQLHelper.close(insert);
}
}
/**
* Update a a user in the database.
*
* @param connection - the connection to use
* @param user - the user
* @throws PersistenceException - if the request fails
*/
public synchronized void update(Connection connection,
User user)
throws PersistenceException {
PreparedStatement update = null;
try {
update = connection.prepareStatement(
"update users set password=? where username=?");
update.setString(1, user.getPassword());
update.setString(2, user.getUsername());
update.executeUpdate();
} catch (Exception error) {
throw new PersistenceException("Users.add failed with "
+ error.toString());
} finally {
SQLHelper.close(update);
}
}
/**
* Remove a user from the database.
*
* @param connection - the connection to use
* @param user - the user
* @return boolean - <tt>true</tt> if it was removed
* @throws PersistenceException - if the request fails
*/
public synchronized boolean remove(Connection connection,
User user)
throws PersistenceException {
boolean success = false;
PreparedStatement deleteUsers = null;
if (user != null) {
try {
deleteUsers = connection.prepareStatement(
"delete from users where username=?");
deleteUsers.setString(1, user.getUsername());
deleteUsers.executeUpdate();
} catch (Exception error) {
throw new PersistenceException("Users.remove failed "
+ error.toString());
} finally {
SQLHelper.close(deleteUsers);
}
}
return success;
}
/**
* Get a user from DB.
*
* @param connection - the connection to use
* @param user - the user
* @return boolean - <tt>true</tt> if it was removed
* @throws PersistenceException - if the request fails
*/
public synchronized User get(Connection connection,
User user)
throws PersistenceException {
PreparedStatement getUser = null;
ResultSet set = null;
User result = null;
if (user != null) {
try {
getUser = connection.prepareStatement(
"select * from users where username=?");
getUser.setString(1, user.getUsername());
set = getUser.executeQuery();
if (set.next()) {
result = new User(set.getString(1), set.getString(2));
}
} catch (Exception error) {
throw new PersistenceException("Users.get failed "
+ error.toString());
} finally {
SQLHelper.close(set);
SQLHelper.close(getUser);
}
}
return result;
}
/**
* List of all users from DB.
*
* @param connection - the connection to use
* @return Vector - all users
* @throws PersistenceException - if the request fails
*/
public synchronized Vector getAllUsers(Connection connection)
throws PersistenceException {
PreparedStatement getUsers = null;
ResultSet set = null;
User user = null;
Vector result = new Vector();
try {
getUsers = connection.prepareStatement(
"select * from users");
set = getUsers.executeQuery();
while (set.next()) {
user = new User(set.getString(1), set.getString(2));
result.add(user);
}
} catch (Exception error) {
throw new PersistenceException("Users.getAllUsers failed ",
error);
} finally {
SQLHelper.close(set);
SQLHelper.close(getUsers);
}
return result;
}
}