1 /*
2 * $Id: MessageRenderer.java 471754 2006-11-06 14:55:09Z husted $
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 package org.apache.struts.faces.renderer;
23
24
25 import java.util.ArrayList;
26 import java.util.Iterator;
27
28 import javax.faces.component.UIComponent;
29 import javax.faces.component.UIParameter;
30 import javax.faces.component.ValueHolder;
31 import javax.faces.context.FacesContext;
32
33 import org.apache.commons.logging.Log;
34 import org.apache.commons.logging.LogFactory;
35 import org.apache.struts.Globals;
36 import org.apache.struts.util.MessageResources;
37 import org.apache.struts.util.ResponseUtils;
38
39
40 /**
41 * <p><code>Renderer</code> implementation for the <code>message</code> tag
42 * from the <em>Struts-Faces Integration Library</em>.</p>
43 *
44 * @version $Rev: 471754 $ $Date: 2006-11-06 08:55:09 -0600 (Mon, 06 Nov 2006) $
45 */
46
47 public class MessageRenderer extends WriteRenderer {
48
49
50 // -------------------------------------------------------- Static Variables
51
52
53 /**
54 * <p>The <code>Log</code> instance for this class.</p>
55 */
56 private static Log log = LogFactory.getLog(MessageRenderer.class);
57
58
59 // ---------------------------------------------------------- Public Methods
60
61
62 // ------------------------------------------------------- Protected Methods
63
64
65 /**
66 * <p>Return the message format String to be processed for this message.
67 * </p>
68 *
69 * @param context FacesContext for the response we are creating
70 * @param component Component to be rendered
71 *
72 * @exception IllegalArgumentException if no MessageResources bundle
73 * can be found
74 * @exception IllegalArgumentException if no message key can be found
75 */
76 protected String getText(FacesContext context, UIComponent component) {
77
78 // Look up the MessageResources bundle to be used
79 String bundle = (String) component.getAttributes().get("bundle");
80 if (bundle == null) {
81 bundle = Globals.MESSAGES_KEY;
82 }
83 MessageResources resources = (MessageResources)
84 context.getExternalContext().getApplicationMap().get(bundle);
85 if (resources == null) { // FIXME - i18n
86 throw new IllegalArgumentException("MessageResources bundle " +
87 bundle + " not found");
88 }
89
90 // Look up the message key to be used
91 Object value = component.getAttributes().get("key");
92 if (value == null) {
93 value = ((ValueHolder) component).getValue();
94 }
95 if (value == null) { // FIXME - i18n
96 throw new NullPointerException("Component '" +
97 component.getClientId(context) +
98 "' has no current value");
99 }
100 String key = value.toString();
101
102 // Build the substitution arguments list
103 ArrayList list = new ArrayList();
104 Iterator kids = component.getChildren().iterator();
105 while (kids.hasNext()) {
106 UIComponent kid = (UIComponent) kids.next();
107 if (!(kid instanceof UIParameter)) {
108 continue;
109 }
110 list.add(((UIParameter) kid).getValue());
111 }
112 Object args[] = list.toArray(new Object[list.size()]);
113
114 // Look up the requested message
115 String text = resources.getMessage(context.getViewRoot().getLocale(),
116 key, args);
117 Boolean filter = (Boolean) component.getAttributes().get("filter");
118 if (filter == null) {
119 filter = Boolean.FALSE;
120 }
121 if (filter.booleanValue()) {
122 return (ResponseUtils.filter(text));
123 } else {
124 return (text);
125 }
126
127 }
128
129
130 }