1 /*
2 * EL4J, the Extension Library for the J2EE, adds incremental enhancements to
3 * the spring framework, http://el4j.sf.net
4 * Copyright (C) 2006 by ELCA Informatique SA, Av. de la Harpe 22-24,
5 * 1000 Lausanne, Switzerland, http://www.elca.ch
6 *
7 * EL4J is published under the GNU Lesser General Public License (LGPL)
8 * Version 2.1. See http://www.gnu.org/licenses/
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * For alternative licensing, please contact info@elca.ch
16 */
17 package ch.elca.el4j.services.persistence.hibernate.dialect;
18
19 import org.hibernate.dialect.DerbyDialect;
20 import org.hibernate.id.IdentityGenerator;
21 import org.hibernate.id.SequenceGenerator;
22 import org.hibernate.id.TableHiLoGenerator;
23
24 /**
25 * Temporary fix to re-enable flexible native key generation. Safety of this
26 * fix is currently beeing determined.
27 *
28 *
29 * @svnLink $Revision: 3882 $;$Date: 2009-08-04 15:24:14 +0200 (Di, 04. Aug 2009) $;$Author: swismer $;$URL: https://el4j.svn.sourceforge.net/svnroot/el4j/branches/el4j_3_1/el4j/framework/modules/hibernate/src/main/java/ch/elca/el4j/services/persistence/hibernate/dialect/PatchedDerbyDialect.java $
30 *
31 * @author Adrian Moos (AMS)
32 */
33 // TODO: verify safety of identity and sequence generation strategy.
34 // mail to hibernate mailing list currently pending.
35 //
36 // see http://opensource.atlassian.com/projects/hibernate/browse/HHH-1918
37 // and http://opensource.atlassian.com/projects/hibernate/browse/HHH-2347
38 public class PatchedDerbyDialect extends DerbyDialect {
39
40 /** {@inheritDoc} */
41 @Override
42 public Class getNativeIdentifierGeneratorClass() {
43 if (supportsIdentityColumns()) {
44 return IdentityGenerator.class;
45 } else if (supportsSequences()) {
46 return SequenceGenerator.class;
47 } else {
48 return TableHiLoGenerator.class;
49 }
50 }
51
52 }