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Java > Open Source Codes > net > mlw > vlh > web > tag > DynaBeanColumnsTag


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.web.tag;
22
23 import javax.servlet.jsp.JspException JavaDoc;
24
25 import net.mlw.vlh.web.tag.support.ColumnInfo;
26 import net.mlw.vlh.web.util.JspUtils;
27
28 import org.apache.commons.beanutils.DynaBean;
29 import org.apache.commons.beanutils.DynaClass;
30 import org.apache.commons.logging.Log;
31 import org.apache.commons.logging.LogFactory;
32
33 /**
34  *
35  * @author Matthew L. Wilson
36  * @version $Revision: 1.10 $ $Date: 2005/11/23 15:02:16 $
37  */
38 public class DynaBeanColumnsTag extends DefaultColumnsTag
39 {
40
41    private static final long serialVersionUID = -6875591300948358739L;
42
43    /**
44     * Logger for this class
45     */
46    private static final Log LOGGER = LogFactory.getLog(DynaBeanColumnsTag.class);
47
48    /**
49     * @see javax.servlet.jsp.tagext.Tag#doEndTag()
50     */
51    public int doEndTag() throws JspException JavaDoc
52    {
53       ValueListSpaceTag rootTag = (ValueListSpaceTag) JspUtils.getParent(this, ValueListSpaceTag.class);
54
55       DefaultRowTag rowTag = (DefaultRowTag) JspUtils.getParent(this, DefaultRowTag.class);
56       DynaBean bean = (DynaBean) pageContext.getAttribute(rowTag.getBeanName());
57       if (bean == null)
58       {
59          LOGGER.error("Zero results where returned.");
60          return SKIP_BODY;
61       }
62
63       DynaClass dClass = bean.getDynaClass();
64
65       StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
66       for (int i = 0, length = dClass.getDynaProperties().length; i < length; i++)
67       {
68          String JavaDoc name = dClass.getDynaProperties()[i].getName();
69          if ((include.isEmpty() || include.contains(name)) && (exclude.isEmpty() || !exclude.contains(name)))
70          {
71             if (rowTag.getCurrentRowNumber() == 0)
72             {
73                String JavaDoc displayName = name.substring(0, 1).toUpperCase() + name.substring(1);
74                rowTag.addColumnInfo(new ColumnInfo(displayName, name, defaultSort, null));
75             }
76
77             sb.append(rowTag.getDisplayProvider().getCellPreProcess(null));
78             if (bean.get(name) == null)
79             {
80                sb.append(rootTag.getConfig().getNullToken());
81             }
82             else
83             {
84                sb.append(bean.get(name));
85             }
86
87             sb.append(rowTag.getDisplayProvider().getCellPostProcess());
88          }
89
90       }
91
92       JspUtils.write(pageContext, sb.toString());
93
94       release();
95
96       return EVAL_PAGE;
97    }
98 }
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