/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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.
*/
package br.com.caelum.vraptor.musicjungle.dao;
import java.util.List;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import org.hibernate.Session;
import br.com.caelum.vraptor.musicjungle.model.User;
/**
* Default implementation for UserDao
*
* @author Lucas Cavalcanti
* @author Rodrigo Turini
*/
public class DefaultUserDao implements UserDao {
private final EntityManager entityManager;
/**
* @deprecated CDI eyes only
*/
protected DefaultUserDao() {
this(null);
}
/**
* Creates a new UserDao. You can receive dependencies
* through constructor adding CDI's \@Inject annotation.
*
* @param entityManager JPA's EntityManager.
*/
@Inject
public DefaultUserDao(EntityManager entityManager) {
this.entityManager = entityManager;
}
@Override
public User find(String login, String password) {
try {
User user = entityManager
.createQuery("select u from User u where u.login = :login and u.password = :password", User.class)
.setParameter("login", login)
.setParameter("password", password)
.getSingleResult();
return user;
} catch (NoResultException e) {
return null;
}
}
@Override
public User find(String login) {
return entityManager.find(User.class, login);
}
@Override
public List<User> listAll() {
return entityManager.createQuery("select u from User u", User.class).getResultList();
}
@Override
public boolean containsUserWithLogin(String login) {
Long count = entityManager
.createQuery("select count(u) from User u where u.login = :login", Long.class)
.setParameter("login", login)
.getSingleResult();
return count > 0;
}
@Override
public void add(User user) {
entityManager.persist(user);
}
@Override
public void refresh(User user) {
getSession().refresh(user); // You still can use Hibernate Session
}
@Override
public void update(User user) {
entityManager.merge(user);
}
private Session getSession() {
return entityManager.unwrap(Session.class);
}
}