Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
PassbackEvaluationExceptionHandler |
|
| 3.4;3.4 |
1 | /* | |
2 | * $Source: /usr/cvsroot/melati/melati/src/site/resources/withWebmacro/org.melati.template.webmacro.PassbackEvaluationExceptionHandler.html,v $ | |
3 | * $Revision: 1.1 $ | |
4 | * | |
5 | * Copyright (C) 2000 Tim Joyce | |
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 Joyce <timj At paneris.org> | |
42 | */ | |
43 | ||
44 | package org.melati.template.webmacro; | |
45 | ||
46 | import org.melati.template.MarkupLanguage; | |
47 | ||
48 | import org.webmacro.PropertyException; | |
49 | import org.webmacro.Context; | |
50 | import org.webmacro.Broker; | |
51 | import org.webmacro.engine.EvaluationExceptionHandler; | |
52 | import org.webmacro.engine.Variable; | |
53 | import org.webmacro.util.Settings; | |
54 | ||
55 | /** | |
56 | * An implementation of EvaluationExceptionHandler which attempts to use a | |
57 | * templet to render the exception. | |
58 | */ | |
59 | 884 | public class PassbackEvaluationExceptionHandler |
60 | implements EvaluationExceptionHandler { | |
61 | ||
62 | /** | |
63 | * {@inheritDoc} | |
64 | * @see org.webmacro.engine.EvaluationExceptionHandler# | |
65 | * init(org.webmacro.Broker, org.webmacro.util.Settings) | |
66 | */ | |
67 | 0 | public void init(Broker b, Settings config) {} |
68 | ||
69 | /** | |
70 | * {@inheritDoc} | |
71 | * @see org.webmacro.engine.EvaluationExceptionHandler# | |
72 | * evaluate(org.webmacro.engine.Variable, org.webmacro.Context, java.lang.Exception) | |
73 | */ | |
74 | public void evaluate(Variable variable, | |
75 | Context context, | |
76 | Exception problem) | |
77 | throws PropertyException { | |
78 | 6 | if (problem instanceof PropertyException.NoSuchVariableException |
79 | || problem instanceof PropertyException.NullValueException | |
80 | || problem instanceof PropertyException.NullToStringException) | |
81 | 0 | return; |
82 | 6 | throw new PropertyException("Failed to evaluate " + |
83 | variable.getVariableName() + ": " + problem,problem); | |
84 | } | |
85 | ||
86 | /** | |
87 | * {@inheritDoc} | |
88 | * @see org.webmacro.engine.EvaluationExceptionHandler# | |
89 | * expand(org.webmacro.engine.Variable, | |
90 | * org.webmacro.Context, java.lang.Exception) | |
91 | */ | |
92 | public String expand(Variable variable, | |
93 | Context context, | |
94 | Exception problem) | |
95 | throws PropertyException { | |
96 | 6 | MarkupLanguage ml = (MarkupLanguage)context.get("ml"); |
97 | 6 | if (ml == null) throw new PropertyException( |
98 | "Error, to use the Passback Evaluation Exception Handler, you must " + | |
99 | "place your MarkupLanguage in the context as $ml" + | |
100 | variable.getVariableName() + ": " + problem, problem); | |
101 | 6 | Throwable underlying = problem; |
102 | 6 | if (problem instanceof PropertyException) { |
103 | 6 | PropertyException prob = (PropertyException)problem; |
104 | 6 | if (prob.getCause() != null) { |
105 | 6 | if (prob.getCause() instanceof PropertyException) |
106 | 6 | prob = (PropertyException)prob.getCause(); |
107 | 6 | underlying = prob.getCause(); |
108 | } | |
109 | } | |
110 | 6 | return ml.rendered(underlying); |
111 | } | |
112 | ||
113 | /** | |
114 | * {@inheritDoc} | |
115 | * @see org.webmacro.engine.EvaluationExceptionHandler#warningString(java.lang.String) | |
116 | */ | |
117 | public String warningString(String warningText) throws PropertyException { | |
118 | 0 | throw new PropertyException("Evaluation warning: " + warningText); |
119 | } | |
120 | ||
121 | /** | |
122 | * {@inheritDoc} | |
123 | * @see org.webmacro.engine.EvaluationExceptionHandler#errorString(java.lang.String) | |
124 | */ | |
125 | public String errorString(String errorText) throws PropertyException { | |
126 | 0 | throw new PropertyException("Evaluation error: " + errorText); |
127 | } | |
128 | } | |
129 |