View Javadoc
1   /*
2    * JBoss, Home of Professional Open Source
3    * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
4    * contributors by the @authors tag. See the copyright.txt in the
5    * distribution for a full listing of individual contributors.
6    *
7    * Licensed under the Apache License, Version 2.0 (the "License");
8    * you may not use this file except in compliance with the License.
9    * You may obtain a copy of the License at
10   * http://www.apache.org/licenses/LICENSE-2.0
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.jboss.as.quickstarts.tasksrs.model;
18  
19  import java.util.List;
20  
21  import javax.ejb.Stateful;
22  import javax.inject.Inject;
23  import javax.persistence.EntityManager;
24  
25  /**
26   * Provides functionality for manipulation with users using persistence context from {@link Resources}.
27   *
28   * @author Lukas Fryc
29   * @author Oliver Kiss
30   *
31   */
32  @Stateful
33  public class UserDaoImpl implements UserDao {
34  
35      @Inject
36      private EntityManager em;
37  
38      public User getForUsername(String username) {
39          List<User> result = em.createQuery("select u from User u where u.username = ?1", User.class).setParameter(1, username)
40                  .getResultList();
41  
42          if (result.isEmpty()) {
43              return null;
44          }
45          return result.get(0);
46      }
47  
48      public void createUser(User user) {
49          em.persist(user);
50      }
51  }