Spring Security 2, la configuración a la medida con DAO Hibernate II

UsernamePasswordAuthenticationToken authReq = new UsernamePasswordAuthenticationToken(userName, password);
.......
Authentication auth = getAuthenticationManager().authenticate(authReq);

<bean id="authenticationManager" class="paquete.MiAuthenticationManager">
	<property name="providerString" value="userDaoProvider" />
</bean>

public class MiAuthenticationManager extends ProviderManager {
protected String providerString;
public void setProviderString(String providerString) {
		this.providerString = providerString;
	}
 /**
  * Agrega al Manejador de Proveedores un listado
  */
public void afterPropertiesSet() throws Exception {
		if (providerString != null) {
			List<authenticationprovider> providers = new LinkedList();
			String[] names = providerString.split(",");
			for (String providerUnit : names) {
				AuthenticationProvider provider = (AuthenticationProvider) applicationContext
						.getBean(providerUnit.trim());
				if (provider == null) {
 
					throw new EnMeExpcetion("AuthenticationProvider "
							+ providerUnit + " don't exist");
				}
				providers.add(provider);
			}
			setProviders(providers);
		}
		super.afterPropertiesSet();
	}
}
 
</authenticationprovider>

<bean id="userDaoProvider"
		class="org.springframework.security.providers.dao.DaoAuthenticationProvider">
		<property name="userDetailsService" ref="dbUserService" />
	</bean>

 
<bean id="dbUserService" class="paquete.MiUserServiceImp">
		<property name="userDao" ref="userDao" />
	</bean>

public class MiUserServiceImp implements UserDetailsService {
         ......
        public UserDetails loadUserByUsername(String username)
			throws UsernameNotFoundException, DataAccessException {
		SecUsers user = userDao.getUser(username);
		if (user == null) {
			log.info("no encontrado...");
			throw new UsernameNotFoundException("username");
		}
		return convertToUserDetails(user);
	}
 
         ......
 
    protected UserDetails convertToUserDetails(SecUsers user){
         //lista de permisos,
         List<string> listPermissions = new ArrayList</string><string>();
        ...........
        GrantedAuthority[] authorities = new GrantedAuthority[listPermissions
				.size()];
		int i = 0;
		for (String permission : listPermissions) {
			authorities[i++] = new GrantedAuthorityImpl(permission.trim());
		}
 
		User userDetails = new User(user.getUsername(), user.getPassword(),
				user.isStatus() == null ? false : user.isStatus(), true,
				true,
				true,
				authorities);
		log.info("userDetails "+userDetails);
		return userDetails;
    }
}
</string>