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1 package org.hibernate.ce.auction.dao;
2
3 import org.hibernate.*;
4 import org.hibernate.criterion.Example;
5 import org.hibernate.ce.auction.exceptions.InfrastructureException;
6 import org.hibernate.ce.auction.model.*;
7 import org.hibernate.ce.auction.persistence.HibernateUtil;
8
9 import java.util.Collection  ;
10
11
16 public class CommentDAO {
17
18 public CommentDAO() {
19 HibernateUtil.beginTransaction();
20 }
21
22
24 public Comment getCommentById(Long commentId, boolean lock)
25 throws InfrastructureException {
26
27 Session session = HibernateUtil.getSession();
28 Comment comment = null;
29 try {
30 if (lock) {
31 comment = (Comment) session.load(Comment.class, commentId, LockMode.UPGRADE);
32 } else {
33 comment = (Comment) session.load(Comment.class, commentId);
34 }
35 } catch (HibernateException ex) {
36 throw new InfrastructureException(ex);
37 }
38 return comment;
39 }
40
41
43 public Collection findAll()
44 throws InfrastructureException {
45
46 Collection comments;
47 try {
48 comments = HibernateUtil.getSession().createCriteria(Comment.class).list();
49 } catch (HibernateException ex) {
50 throw new InfrastructureException(ex);
51 }
52 return comments;
53 }
54
55
57 public Collection findByExample(Comment exampleComment)
58 throws InfrastructureException {
59
60 Collection comments;
61 try {
62 Criteria crit = HibernateUtil.getSession().createCriteria(Comment.class);
63 comments = crit.add(Example.create(exampleComment)).list();
64 } catch (HibernateException ex) {
65 throw new InfrastructureException(ex);
66 }
67 return comments;
68 }
69
70
72 public void makePersistent(Comment comment)
73 throws InfrastructureException {
74
75 try {
76 HibernateUtil.getSession().saveOrUpdate(comment);
77 } catch (HibernateException ex) {
78 throw new InfrastructureException(ex);
79 }
80 }
81
82
84 public void makeTransient(Comment comment)
85 throws InfrastructureException {
86
87 try {
88 HibernateUtil.getSession().delete(comment);
89 } catch (HibernateException ex) {
90 throw new InfrastructureException(ex);
91 }
92 }
93
94
95 }
96 |
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