/**
* 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 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
*/
package org.exolab.jms.tools.migration.proxy;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.jms.JMSException;
import org.exolab.jms.authentication.User;
import org.exolab.jms.persistence.PersistenceException;
import org.exolab.jms.persistence.SQLHelper;
import org.exolab.jms.tools.migration.IteratorAdapter;
import org.exolab.jms.tools.migration.Store;
import org.exolab.jms.tools.migration.StoreIterator;
/**
* Provides persistency for {@link User} instances.
*
* @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
* @version $Revision: 1.1 $ $Date: 2005/10/20 14:07:03 $
*/
public class UserStore implements Store, DBConstants {
/**
* The database connection.
*/
private final Connection _connection;
/**
* Construct a new <code>UserStore</code>.
*
* @param connection the database connection
*/
public UserStore(Connection connection) {
_connection = connection;
}
/**
* Export the users.
*
* @return an iterator over the collection
* @throws JMSException for any JMS error
* @throws PersistenceException for any persistence error
*/
public StoreIterator exportCollection() throws JMSException,
PersistenceException {
List users = getUsers();
return new IteratorAdapter(users.iterator());
}
/**
* Import users into the store.
*
* @param iterator an iterator over the collection
* @throws JMSException for any JMS error
* @throws PersistenceException for any persistence error
*/
public void importCollection(StoreIterator iterator) throws JMSException,
PersistenceException {
while (iterator.hasNext()) {
User user = (User) iterator.next();
add(user);
}
}
/**
* Returns the number of elements in the collection.
*
* @return the number of elements in the collection
* @throws PersistenceException for any persistence error
*/
public int size() throws PersistenceException {
return getUsers().size();
}
/**
* Add a new user.
*
* @param user the user to add
* @throws PersistenceException for any persistence error
*/
private void add(User user) throws PersistenceException {
PreparedStatement insert = null;
try {
insert = _connection.prepareStatement(
"insert into " + USER_TABLE + " values (?, ?)");
insert.setString(1, user.getUsername());
insert.setString(2, user.getPassword());
insert.executeUpdate();
} catch (SQLException exception) {
throw new PersistenceException("Failed to add consumer",
exception);
} finally {
SQLHelper.close(insert);
}
}
/**
* Returns the users.
*
* @return a list of {@link User} instances
* @throws PersistenceException for any persistence error
*/
private List getUsers() throws PersistenceException {
ArrayList result = new ArrayList();
PreparedStatement select = null;
ResultSet set = null;
try {
select = _connection.prepareStatement(
"select * from " + USER_TABLE);
set = select.executeQuery();
while (set.next()) {
String user = set.getString("username");
String password = set.getString("password");
result.add(new User(user, password));
}
} catch (SQLException exception) {
throw new PersistenceException("Failed to retrieve users",
exception);
} finally {
SQLHelper.close(set);
SQLHelper.close(select);
}
return result;
}
}