|
1 package org.hibernate.ce.auction.dao;
2
3 import org.hibernate.*;
4 import org.hibernate.criterion.*;
5 import org.hibernate.ce.auction.exceptions.InfrastructureException;
6 import org.hibernate.ce.auction.model.Category;
7 import org.hibernate.ce.auction.persistence.HibernateUtil;
8
9 import java.util.Collection  ;
10
11
16 public class CategoryDAO {
17
18 public CategoryDAO() {
19 HibernateUtil.beginTransaction();
20 }
21
22
24 public Category getCategoryById(Long categoryId, boolean lock)
25 throws InfrastructureException {
26
27 Session session = HibernateUtil.getSession();
28 Category cat = null;
29 try {
30 if (lock) {
31 cat = (Category) session.load(Category.class, categoryId, LockMode.UPGRADE);
32 } else {
33 cat = (Category) session.load(Category.class, categoryId);
34 }
35 } catch (HibernateException ex) {
36 throw new InfrastructureException(ex);
37 }
38 return cat;
39 }
40
41
43 public Collection findAll(boolean onlyRootCategories)
44 throws InfrastructureException {
45
46 Collection categories;
47 try {
48 if (onlyRootCategories) {
49 Criteria crit = HibernateUtil.getSession().createCriteria(Category.class);
50 categories = crit.add(Expression.isNull("parentCategory")).list();
51 } else {
52 categories = HibernateUtil.getSession().createCriteria(Category.class).list();
53 }
54 } catch (HibernateException ex) {
55 throw new InfrastructureException(ex);
56 }
57 return categories;
58 }
59
60
62 public Collection findByExample(Category exampleCategory)
63 throws InfrastructureException {
64
65 Collection categories;
66 try {
67 Criteria crit = HibernateUtil.getSession().createCriteria(Category.class);
68 categories = crit.add(Example.create(exampleCategory)).list();
69 } catch (HibernateException ex) {
70 throw new InfrastructureException(ex);
71 }
72 return categories;
73 }
74
75
77 public void makePersistent(Category category)
78 throws InfrastructureException {
79
80 try {
81 HibernateUtil.getSession().saveOrUpdate(category);
82 } catch (HibernateException ex) {
83 throw new InfrastructureException(ex);
84 }
85 }
86
87
89 public void makeTransient(Category category)
90 throws InfrastructureException {
91
92 try {
93 HibernateUtil.getSession().delete(category);
94 } catch (HibernateException ex) {
95 throw new InfrastructureException(ex);
96 }
97 }
98
99 }
100 |
Popular Tags |
Java API By Example, From Geeks To Geeks.