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1 package org.hibernate.id;
3
4 import java.io.Serializable  ;
5 import java.sql.PreparedStatement ;
6 import java.sql.ResultSet ;
7 import java.sql.SQLException ;
8
9 import org.apache.commons.logging.Log;
10 import org.apache.commons.logging.LogFactory;
11 import org.hibernate.HibernateException;
12 import org.hibernate.engine.SessionImplementor;
13 import org.hibernate.exception.JDBCExceptionHelper;
14
15
20 public class GUIDGenerator implements IdentifierGenerator {
21
22 private static final Log log = LogFactory.getLog(GUIDGenerator.class);
23
24 public Serializable generate(SessionImplementor session, Object obj)
25 throws HibernateException {
26
27 final String sql = session.getFactory().getDialect().getSelectGUIDString();
28 try {
29 PreparedStatement st = session.getBatcher().prepareSelectStatement(sql);
30 try {
31 ResultSet rs = st.executeQuery();
32 final String result;
33 try {
34 rs.next();
35 result = rs.getString(1);
36 }
37 finally {
38 rs.close();
39 }
40 log.debug("GUID identifier generated: " + result);
41 return result;
42 }
43 finally {
44 session.getBatcher().closeStatement(st);
45 }
46 }
47 catch (SQLException sqle) {
48 throw JDBCExceptionHelper.convert(
49 session.getFactory().getSQLExceptionConverter(),
50 sqle,
51 "could not retrieve GUID",
52 sql
53 );
54 }
55 }
56
57 }
58 |
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