1 /*
2 * $Source: /usr/cvsroot/melati/melati/src/main/java/org/melati/template/velocity/PropagateEvaluationExceptionHandler.java,v $
3 * $Revision: 1.1 $
4 *
5 * Copyright (C) 2008 Tim Pizey
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * Tim Pizey <timp At paneris.org>
42 * http://paneris.org/~timp
43 */
44
45 package org.melati.template.velocity;
46
47 import java.lang.reflect.Method;
48
49 import org.apache.velocity.app.event.InvalidReferenceEventHandler;
50 import org.apache.velocity.context.Context;
51 import org.apache.velocity.util.introspection.Info;
52 import org.melati.template.TemplateEngineException;
53
54 /**
55 * @author timp
56 * @since 1 Apr 2008
57 *
58 */
59 public class PropagateEvaluationExceptionHandler implements
60 InvalidReferenceEventHandler {
61
62 /**
63 * Constructor.
64 */
65 public PropagateEvaluationExceptionHandler() {
66 }
67
68 public Object invalidGetMethod(Context context, String reference,
69 Object object, String property, Info info) {
70 return null;
71 }
72
73 public Object invalidMethod(Context context, String reference, Object object,
74 String method, Info info) {
75 if(object != null) {
76 Method[] methods = object.getClass().getMethods();
77 for (int i = 0; i < methods.length; i++)
78 if (methods[i].getName().equals(method))
79 return null;
80 }
81 String message = "Invalid method ";
82 message += (method == null) ? "(null)" : method;
83 message += " called ";
84 message += (reference == null) ? "(null reference)" : reference;
85 message += (object == null) ? " (null object)" : " on object " + object;
86 message += " at " + info;
87 throw new TemplateEngineException(message);
88 }
89
90 public boolean invalidSetMethod(Context context, String leftreference,
91 String rightreference, Info info) {
92 return true;
93 /*
94 throw new TemplateEngineException("Invalid set method " +
95 (rightreference == null ? "null" : rightreference)
96 + " called setting " + leftreference + " at " + info);
97 */
98 }
99
100 }