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1 /*
2 * $Id: ActionListenerImpl.java,v 1.25 2007/04/27 22:00:53 ofung Exp $
3 */
4
5 /*
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
7 *
8 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
9 *
10 * The contents of this file are subject to the terms of either the GNU
11 * General Public License Version 2 only ("GPL") or the Common Development
12 * and Distribution License("CDDL") (collectively, the "License"). You
13 * may not use this file except in compliance with the License. You can obtain
14 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
15 * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
16 * language governing permissions and limitations under the License.
17 *
18 * When distributing the software, include this License Header Notice in each
19 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
20 * Sun designates this particular file as subject to the "Classpath" exception
21 * as provided by Sun in the GPL Version 2 section of the License file that
22 * accompanied this code. If applicable, add the following below the License
23 * Header, with the fields enclosed by brackets [] replaced by your own
24 * identifying information: "Portions Copyrighted [year]
25 * [name of copyright owner]"
26 *
27 * Contributor(s):
28 *
29 * If you wish your version of this file to be governed by only the CDDL or
30 * only the GPL Version 2, indicate your decision by adding "[Contributor]
31 * elects to include this software in this distribution under the [CDDL or GPL
32 * Version 2] license." If you don't indicate a single choice of license, a
33 * recipient has the option to distribute your version of this file under
34 * either the CDDL, the GPL Version 2 or to extend the choice of license to
35 * its licensees as provided above. However, if you add GPL Version 2 code
36 * and therefore, elected the GPL Version 2 license, then the option applies
37 * only if the new code is made subject to such option by the copyright
38 * holder.
39 */
40
41 package com.sun.faces.application;
42
43 import javax.faces.FacesException;
44 import javax.faces.application.Application;
45 import javax.faces.application.NavigationHandler;
46 import javax.faces.component.ActionSource;
47 import javax.faces.component.UIComponent;
48 import javax.faces.context.FacesContext;
49 import javax.faces.el.EvaluationException;
50 import javax.faces.el.MethodBinding;
51 import javax.faces.el.MethodNotFoundException;
52 import javax.faces.event.ActionEvent;
53 import javax.faces.event.ActionListener;
54
55 import java.util.logging.Level;
56 import java.util.logging.Logger;
57 import java.text.MessageFormat;
58
59 import com.sun.faces.util.Util;
60 import com.sun.faces.util.FacesLogger;
61
62 /**
63 * This action listener implementation processes action events during the
64 * <em>Apply Request Values</em> or <em>Invoke Application</em>
65 * phase of the request processing lifecycle (depending upon the
66 * <code>immediate</code> property of the {@link ActionSource} that
67 * queued this event. It invokes the specified application action method,
68 * and uses the logical outcome value to invoke the default navigation handler
69 * mechanism to determine which view should be displayed next.</p>
70 */
71 public class ActionListenerImpl implements ActionListener {
72
73
74 // Log instance for this class
75 private static final Logger LOGGER = FacesLogger.APPLICATION.getLogger();
76
77
78 // --------------------------------------------- Methods From ActionListener
79
80
81
82 @SuppressWarnings("deprecation")
83 public void processAction(ActionEvent event) {
84
85 if (LOGGER.isLoggable(Level.FINE)) {
86 LOGGER.fine(MessageFormat.format("processAction({0})",
87 event.getComponent().getId()));
88 }
89 UIComponent source = event.getComponent();
90 ActionSource actionSource = (ActionSource) source;
91 FacesContext context = FacesContext.getCurrentInstance();
92
93 Application application = context.getApplication();
94
95 Object invokeResult;
96 String outcome = null;
97 MethodBinding binding;
98
99 binding = actionSource.getAction();
100 if (binding != null) {
101 try {
102 if (null != (invokeResult = binding.invoke(context, null))) {
103 outcome = invokeResult.toString();
104 }
105 // else, default to null, as assigned above.
106 } catch (MethodNotFoundException e) {
107 if (LOGGER.isLoggable(Level.SEVERE)) {
108 LOGGER.log(Level.SEVERE, e.getMessage(), e);
109 }
110 throw new FacesException
111 (binding.getExpressionString() + ": " + e.getMessage(),
112 e);
113 }
114 catch (EvaluationException e) {
115 if (LOGGER.isLoggable(Level.SEVERE)) {
116 LOGGER.log(Level.SEVERE, e.getMessage(), e);
117 }
118 throw new FacesException
119 (binding.getExpressionString() + ": " + e.getMessage(),
120 e);
121 }
122 }
123
124 // Retrieve the NavigationHandler instance..
125
126 NavigationHandler navHandler = application.getNavigationHandler();
127
128 // Invoke nav handling..
129
130 navHandler.handleNavigation(context,
131 (null != binding) ?
132 binding.getExpressionString() : null,
133 outcome);
134
135 // Trigger a switch to Render Response if needed
136 context.renderResponse();
137
138 }
139
140 }