1 /*
2 * $Id: ErrorTag.java 130 2004-11-28 13:00:44Z josem $
3 *
4 * Tarsis
5 * Copyright (C) 2002 Talika Open Source Group
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23 package org.talika.tarsis.taglib.util;
24
25 import java.io.IOException;
26
27 import javax.servlet.jsp.JspWriter;
28 import javax.servlet.jsp.tagext.TagSupport;
29
30 /**
31 * Implementation of <util:error> tag.
32 *
33 * @author Jose M. Palomar
34 * @version $Revision: 130 $
35 */
36 public class ErrorTag extends TagSupport {
37
38 // Fields
39
40 // Methods
41 /**
42 * Process the start tag for this instance.
43 *
44 * @return int SKIP_BODY.
45 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
46 */
47 public int doStartTag() {
48
49 try {
50
51 JspWriter out = pageContext.getOut();
52
53 Throwable t = (Throwable) pageContext.findAttribute("javax.servlet.jsp.jspException");
54 if (t != null) {
55 if (t.getMessage() != null) {
56 out.print(t.getMessage());
57 }
58 else {
59 out.print(t.toString());
60 }
61 }
62
63 }
64 catch (IOException ioe) {
65 // Bad luck
66 }
67
68 return SKIP_BODY;
69
70 }
71
72 }