1 /*
2 * Copyright 2004 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package javax.faces.convert;
17
18 import javax.faces.application.FacesMessage;
19 import javax.faces.context.FacesContext;
20 import java.text.MessageFormat;
21 import java.util.Locale;
22 import java.util.MissingResourceException;
23 import java.util.ResourceBundle;
24
25 /**
26 * @author Manfred Geiler (latest modification by $Author: grantsmith $)
27 * @version $Revision: 169646 $ $Date: 2005-05-11 11:34:57 -0400 (Wed, 11 May 2005) $
28 */
29 class _MessageUtils
30 {
31 private static final String DETAIL_SUFFIX = "_detail";
32
33 static FacesMessage getErrorMessage(FacesContext facesContext,
34 String messageId,
35 Object args[])
36 {
37 return getMessage(facesContext,
38 facesContext.getViewRoot().getLocale(),
39 FacesMessage.SEVERITY_ERROR,
40 messageId,
41 args);
42 }
43
44 static FacesMessage getMessage(FacesContext facesContext,
45 Locale locale,
46 FacesMessage.Severity severity,
47 String messageId,
48 Object args[])
49 {
50 ResourceBundle appBundle;
51 ResourceBundle defBundle;
52 String summary;
53 String detail;
54
55 appBundle = getApplicationBundle(facesContext, locale);
56 summary = getBundleString(appBundle, messageId);
57 if (summary != null)
58 {
59 detail = getBundleString(appBundle, messageId + DETAIL_SUFFIX);
60 }
61 else
62 {
63 defBundle = getDefaultBundle(facesContext, locale);
64 summary = getBundleString(defBundle, messageId);
65 if (summary != null)
66 {
67 detail = getBundleString(defBundle, messageId + DETAIL_SUFFIX);
68 }
69 else
70 {
71 //Try to find detail alone
72 detail = getBundleString(appBundle, messageId + DETAIL_SUFFIX);
73 if (detail != null)
74 {
75 summary = null;
76 }
77 else
78 {
79 detail = getBundleString(defBundle, messageId + DETAIL_SUFFIX);
80 if (detail != null)
81 {
82 summary = null;
83 }
84 else
85 {
86 //Neither detail nor summary found
87 return null;
88 }
89 }
90 }
91 }
92
93 if (args != null && args.length > 0)
94 {
95 MessageFormat format;
96
97 if (summary != null)
98 {
99 format = new MessageFormat(summary, locale);
100 summary = format.format(args);
101 }
102
103 if (detail != null)
104 {
105 format = new MessageFormat(detail, locale);
106 detail = format.format(args);
107 }
108 }
109
110 return new FacesMessage(severity, summary, detail);
111 }
112
113
114 private static String getBundleString(ResourceBundle bundle, String key)
115 {
116 try
117 {
118 return bundle == null ? null : bundle.getString(key);
119 }
120 catch (MissingResourceException e)
121 {
122 return null;
123 }
124 }
125
126
127 private static ResourceBundle getApplicationBundle(FacesContext facesContext, Locale locale)
128 {
129 String bundleName = facesContext.getApplication().getMessageBundle();
130 if (bundleName != null)
131 {
132 return getBundle(facesContext, locale, bundleName);
133 }
134 else
135 {
136 return null;
137 }
138 }
139
140 private static ResourceBundle getDefaultBundle(FacesContext facesContext,
141 Locale locale)
142 {
143 return getBundle(facesContext, locale, FacesMessage.FACES_MESSAGES);
144 }
145
146 private static ResourceBundle getBundle(FacesContext facesContext,
147 Locale locale,
148 String bundleName)
149 {
150 try
151 {
152 //First we try the JSF implementation class loader
153 return ResourceBundle.getBundle(bundleName,
154 locale,
155 facesContext.getClass().getClassLoader());
156 }
157 catch (MissingResourceException ignore1)
158 {
159 try
160 {
161 //Next we try the JSF API class loader
162 return ResourceBundle.getBundle(bundleName,
163 locale,
164 _MessageUtils.class.getClassLoader());
165 }
166 catch (MissingResourceException ignore2)
167 {
168 try
169 {
170 //Last resort is the context class loader
171 return ResourceBundle.getBundle(bundleName,
172 locale,
173 Thread.currentThread().getContextClassLoader());
174 }
175 catch (MissingResourceException damned)
176 {
177 facesContext.getExternalContext().log("resource bundle " + bundleName + " could not be found");
178 return null;
179 }
180 }
181 }
182 }
183
184 }
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