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1 package org.objectweb.rentacar.persistance.dao;
2
3 import java.io.Serializable  ;
4 import java.util.ArrayList ;
5 import java.util.Iterator ;
6 import java.util.List ;
7
8 import org.hibernate.ObjectNotFoundException;
9 import org.hibernate.Session;
10 import org.hibernate.Transaction;
11 import org.objectweb.rentacar.persistance.util.HibernateUtil;
12
13 public class GenericDAO {
14
15 public String create(Object o) throws DAOException {
16 Session session = null;
17 try{
18 session = HibernateUtil.getSession();
19 }catch (ExceptionInInitializerError e){
20 throw new DAOException("Error in Hibernate Session instanciation", e);
21 }catch (Exception e){
22 throw new DAOException("Error in Hibernate Session instanciation", e);
23 }
24
25 Transaction tx = null;
26 try{
27 tx = session.beginTransaction();
28 Serializable s = session.save(o);
29 tx.commit();
30 return (String ) s;
31 }catch (Exception e) {
32 if (tx!=null) tx.rollback();
33 if (o!=null){
34 throw new DAOException("Error creating new "+o.getClass().getName(), e);
35 }
36 throw new DAOException("Error creating new Object of type null", e);
37 }
38 }
39
40 public String persist(Object o) throws DAOException {
41 Session session = null;
42 try{
43 session = HibernateUtil.getSession();
44 }catch (ExceptionInInitializerError e){
45 throw new DAOException("Error in Hibernate Session instanciation", e);
46 }catch (Exception e){
47 throw new DAOException("Error in Hibernate Session instanciation", e);
48 }
49
50 Transaction tx = null;
51 try{
52 tx = session.beginTransaction();
53 session.persist(o);
54 Serializable s = session.save(o);
55
56 tx.commit();
57 return (String ) s;
58 }catch (Exception e) {
59 if (tx!=null) tx.rollback();
60 if (o!=null){
61 throw new DAOException("Error creating new "+o.getClass().getName(), e);
62 }
63 throw new DAOException("Error creating new Object of type null", e);
64 }
65 }
66
67 public void delete(Object o) throws DAOException {
68 Session session = null;
69 try{
70 session = HibernateUtil.getSession();
71 }catch (ExceptionInInitializerError e){
72 throw new DAOException("Error in Hibernate Session instanciation", e);
73 }catch (Exception e){
74 throw new DAOException("Error in Hibernate Session instanciation", e);
75 }
76
77 Transaction tx = null;
78 try{
79 tx = session.beginTransaction();
80 session.delete(o);
81 tx.commit();
82 }catch (Exception e) {
83 if (tx!=null) tx.rollback();
84 if (o!=null){
85 throw new DAOException("Error deleting "+o.getClass().getName(), e);
86 }
87 throw new DAOException("Error deleting Object of type null", e);
88 }
89 }
90
91 public void update(Object o) throws DAOException {
92 Session session = null;
93 try{
94 session = HibernateUtil.getSession();
95 }catch (ExceptionInInitializerError e){
96 throw new DAOException("Error in Hibernate Session instanciation", e);
97 }catch (Exception e){
98 throw new DAOException("Error in Hibernate Session instanciation", e);
99 }
100
101 Transaction tx = null;
102 try{
103 tx = session.beginTransaction();
104 session.update(o);
105 tx.commit();
106 }catch (Exception e) {
107 if (tx!=null) tx.rollback();
108 if (o!=null){
109 throw new DAOException("Error updating "+o.getClass().getName(), e);
110 }
111 throw new DAOException("Error updating Object of type null", e);
112 }
113 }
114
115 public Object retrieveById(Class clazz, Serializable s) throws DAOException {
116 Session session = null;
117 try{
118 session = HibernateUtil.getSession();
119 }catch (ExceptionInInitializerError e){
120 throw new DAOException("Error in Hibernate Session instanciation", e);
121 }catch (Throwable e){
122 throw new DAOException("Error in Hibernate Session instanciation", e);
123 }
124
125 Object result;
126 try {
127 result = session.load(clazz, s);
128 }catch (ObjectNotFoundException e){
129 throw new DAOException("Error loading "+clazz.getName()+" with id : "+s, e);
130 }
131 catch (Throwable e){
132 if (clazz !=null){
133 throw new DAOException("Error loading "+clazz.getName()+" with id : "+s, e);
134 }
135 throw new DAOException("Error retrieving an Object of type null", e);
136 }
137
138 return result;
139 }
140
141 public List <Object > retrieveAll(Class clazz) throws DAOException {
142 Session session = null;
143 try{
144 session = HibernateUtil.getSession();
145 }catch (ExceptionInInitializerError e){
146 throw new DAOException("Error in Hibernate Session instanciation", e);
147 }
148 catch (Exception e){
149 throw new DAOException("Error in Hibernate Session instanciation", e);
150 }
151 try {
152 List list = session.createQuery("from "+clazz.getName()).list();
153 List <Object > result = new ArrayList <Object >();
154 for (Iterator iter = list.iterator();iter.hasNext();){
155 result.add((Object ) iter.next());
156 }
157 return result;
158 }catch (Exception e){
159 if (clazz !=null){
160 throw new DAOException("Error retrieving all"+clazz.getName(), e);
161 }
162 throw new DAOException("Error retrieving all Objects of type null", e);
163 }
164 }
166
167 }
168 |
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