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Java > Open Source Codes > net > mlw > vlh > adapter > hibernate3 > 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.hibernate3.util.setter;
22
23 import java.text.ParseException JavaDoc;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.hibernate.HibernateException;
28 import org.hibernate.Query;
29
30 /** Sets a <code>Double</code> on a <code>Query</code>. Conversion from a string is provided using <code>Double.parseDouble()</code>.
31  *
32  * @author Matthew L. Wilson
33  * @version $Revision: 1.3 $ $Date: 2005/12/19 12:22:26 $
34  */
35 public class DoubleSetter extends AbstractSetter
36 {
37    /**
38     * Logger for this class
39     */
40    private static final Log LOGGER = LogFactory.getLog(DoubleSetter.class);
41
42    /**
43     * @see net.mlw.vlh.adapter.hibernate3.util.Setter#set(Query, String, Object)
44     */
45    public void set(Query query, String JavaDoc key, Object JavaDoc value) throws HibernateException, ParseException JavaDoc
46    {
47       if (value instanceof Double JavaDoc)
48       {
49          if (LOGGER.isInfoEnabled())
50          {
51             LOGGER.info("The key='" + key + "'s value is instance of a Double, now is converting to double.");
52          }
53          double doubleValue = ((Double JavaDoc) value).doubleValue();
54          query.setDouble(key, doubleValue);
55       }
56       else if (value instanceof String JavaDoc)
57       {
58          if (LOGGER.isInfoEnabled())
59          {
60             LOGGER.info("The key='" + key + "'s value is instance of a String, now is parsing to double.");
61          }
62          double doubleValue = Double.parseDouble((String JavaDoc) value);
63          query.setDouble(key, doubleValue);
64       }
65       else if (value == null)
66       {
67          if (LOGGER.isInfoEnabled())
68          {
69             LOGGER.info("The key='" + key + "'s value is null.");
70          }
71          query.setParameter(key, null);
72       }
73       else
74       {
75          throw new IllegalArgumentException JavaDoc("Cannot convert value of class " + value.getClass().getName() + " to double (key=" + key + ")");
76       }
77    }
78 }
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