/*

 Copyright 2010 James Pether Sörling Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 

         $Id

 */

 package org.directdemocracyportal.democracy.service.dao.hibernate;

 import java.util.List;

 import org.directdemocracyportal.democracy.model.application.User;

 import org.directdemocracyportal.democracy.service.dao.UserDAO;

 import org.hibernate.criterion.DetachedCriteria;

 import org.hibernate.criterion.Restrictions;

 import org.springframework.dao.DataAccessException;

 import org.springframework.transaction.annotation.Propagation;

 import org.springframework.transaction.annotation.Transactional;

 /**

  * The Class HibernateUserDAO.

  */

 @Transactional(propagation = Propagation.MANDATORY)

 public class HibernateUserDAO extends GenericHibernateDAO<User, Long> implements

         UserDAO

 {

     /**

      * Instantiates a new hibernate user dao.

      */

     public HibernateUserDAO() {

         super(User.class);

     }

     /*

      * (non-Javadoc)

      *

      * @see org.directdemocracyportal.democracy.service.dao.UserDAO#findByUsername(java.lang.String)

      */

     @Transactional(readOnly = true)

     public User findByUsername(String username) throws DataAccessException {

         DetachedCriteria findUserByName = DetachedCriteria.forClass(User.class);

         findUserByName.add(Restrictions.eq("username", username));

         @SuppressWarnings("unchecked")

         List<User> result = this.getHibernateTemplate().findByCriteria(

                 findUserByName);

         return result.isEmpty() ? null : result.get(0);

     }

 }