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Java > Open Source Codes > net > mlw > vlh > adapter > hibernate > util > setter > DoubleSetter


1 /**
2  * Copyright (c) 2003 held jointly by the individual authors.
3  *
4  * This library is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU Lesser General Public License as published
6  * by the Free Software Foundation; either version 2.1 of the License, or
7  * (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; with out even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with this library; if not, write to the Free Software Foundation,
16  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17  *
18  * > http://www.gnu.org/copyleft/lesser.html
19  * > http://www.opensource.org/licenses/lgpl-license.php
20  */
21 package net.mlw.vlh.adapter.hibernate.util.setter;
22
23 import java.text.ParseException JavaDoc;
24
25 import net.sf.hibernate.HibernateException;
26 import net.sf.hibernate.Query;
27
28 import org.apache.commons.logging.Log;
29 import org.apache.commons.logging.LogFactory;
30
31 /** Sets a <code>Double</code> on a <code>Query</code>. Conversion from a string is provided using <code>Double.parseDouble()</code>.
32  *
33  * @author Matthew L. Wilson
34  * @version $Revision: 1.5 $ $Date: 2005/12/19 12:22:30 $
35  */
36 public class DoubleSetter extends AbstractSetter
37 {
38    /**
39     * Logger for this class
40     */
41    private static final Log LOGGER = LogFactory.getLog(DoubleSetter.class);
42
43    /**
44     * @see net.mlw.vlh.adapter.hibernate.util.Setter#set(Query, String, Object)
45     */
46    public void set(Query query, String JavaDoc key, Object JavaDoc value) throws HibernateException, ParseException JavaDoc
47    {
48       if (value instanceof Double JavaDoc)
49       {
50          if (LOGGER.isInfoEnabled())
51          {
52             LOGGER.info("The key='" + key + "'s value is instance of a Double, now is converting to double.");
53          }
54          double doubleValue = ((Double JavaDoc) value).doubleValue();
55          query.setDouble(key, doubleValue);
56       }
57       else if (value instanceof String JavaDoc)
58       {
59          if (LOGGER.isInfoEnabled())
60          {
61             LOGGER.info("The key='" + key + "'s value is instance of a String, now is parsing to double.");
62          }
63          double doubleValue = Double.parseDouble((String JavaDoc) value);
64          query.setDouble(key, doubleValue);
65       }
66       else if (value == null)
67       {
68          if (LOGGER.isInfoEnabled())
69          {
70             LOGGER.info("The key='" + key + "'s value is null.");
71          }
72          query.setParameter(key, null);
73       }
74       else
75       {
76          throw new IllegalArgumentException JavaDoc("Cannot convert value of class " + value.getClass().getName() + " to double (key=" + key + ")");
77       }
78    }
79 }
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