| 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 |