JDBCLongVersionFieldBridge


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4   * by the @authors tag. See the copyright.txt in the distribution for a
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8   * under the terms of the GNU Lesser General Public License as
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10  * the License, or (at your option) any later version.
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13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22  package org.jboss.ejb.plugins.cmp.jdbc.bridge;
23  
24  import org.jboss.ejb.EntityEnterpriseContext;
25  import org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager;
26  import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCCMPFieldMetaData;
27  import org.jboss.deployment.DeploymentException;
28  
29  /**
30   *
31   * @author <a HREF="mailto:alex@jboss.org">Alexey Loubyansky</a>
32   */
33  public class JDBCLongVersionFieldBridge extends JDBCCMP2xVersionFieldBridge
34  {
35     private static final Long   FIRST_VERSION = new Long  (1);
36  
37     public JDBCLongVersionFieldBridge(JDBCStoreManager manager,
38                                       JDBCCMPFieldMetaData metadata)
39        throws DeploymentException
40     {
41        super(manager, metadata);
42     }
43  
44     public JDBCLongVersionFieldBridge(JDBCCMP2xFieldBridge cmpField)
45        throws DeploymentException
46     {
47        super(cmpField);
48     }
49  
50     public void setFirstVersion(EntityEnterpriseContext ctx)
51     {
52        setInstanceValue(ctx, FIRST_VERSION);
53     }
54  
55     public Object   updateVersion(EntityEnterpriseContext ctx)
56     {
57        final Long   value = (Long  )getInstanceValue(ctx);
58        Long   next = value == null ? FIRST_VERSION : new Long  (value.longValue() + 1);
59        setInstanceValue(ctx, next);
60        return next;
61     }
62  }
63
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