/**
* Copyright (c) 2005-2011, Rory Ye
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the Jdkcn.com nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS 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 THE COPYRIGHT OWNER OR 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.
*/
package com.jdkcn.myblog.service.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import org.apache.commons.lang.StringUtils;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.persist.Transactional;
import com.jdkcn.myblog.domain.User;
import com.jdkcn.myblog.exception.DuplicateException;
import com.jdkcn.myblog.service.UserService;
/**
* @author <a href="mailto:rory.cn@gmail.com">Rory</a>
* @version $Id: UserServiceImpl.java 427 2011-05-13 09:28:19Z rory.cn $
*/
public class UserServiceImpl implements UserService {
@Inject
private Provider<EntityManager> entityManagerProvider;
/**
* {@inheritDoc}
*/
@Transactional
public User saveOrUpdate(User user) {
User exist = getByUsername(user.getUsername());
if (exist != null && !StringUtils.equals(user.getId(), exist.getId())) {
throw new DuplicateException(User.class.getName(), "username", user.getUsername());
}
exist = getByEmail(user.getEmail());
if (exist != null && !StringUtils.equals(user.getId(), exist.getId())) {
throw new DuplicateException(User.class.getName(), "email", user.getEmail());
}
return entityManagerProvider.get().merge(user);
}
/**
* {@inheritDoc}
*/
public User get(String id) {
return entityManagerProvider.get().find(User.class, id);
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public User getByUsername(String username) {
Query query = entityManagerProvider.get().createQuery("from User u where u.username = :username");
query.setParameter("username", username);
List<User> users = query.getResultList();
if (users.isEmpty()) {
return null;
}
return users.get(0);
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public User getByEmail(String email) {
Query query = entityManagerProvider.get().createQuery("from User u where u.email = :email");
query.setParameter("email", email);
List<User> users = query.getResultList();
if (users.isEmpty()) {
return null;
}
return users.get(0);
}
}