KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > struts > webapp > validator > LocaleAction


1 /*
2  * $Id: LocaleAction.java 157397 2005-03-14 06:20:47Z martinc $
3  *
4  * Copyright 2000-2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19
20 package org.apache.struts.webapp.validator;
21
22 import java.util.Locale JavaDoc;
23
24 import javax.servlet.http.HttpServletRequest JavaDoc;
25 import javax.servlet.http.HttpServletResponse JavaDoc;
26 import javax.servlet.http.HttpSession JavaDoc;
27
28 import org.apache.commons.beanutils.PropertyUtils;
29 import org.apache.commons.logging.Log;
30 import org.apache.commons.logging.LogFactory;
31 import org.apache.struts.Globals;
32 import org.apache.struts.action.Action;
33 import org.apache.struts.action.ActionForm;
34 import org.apache.struts.action.ActionForward;
35 import org.apache.struts.action.ActionMapping;
36
37
38 /**
39  * Implementation of <strong>Action</strong> that changes the user's
40  * {@link java.util.Locale} and forwards to a page, based on request level
41  * parameters that are set (language, country, &amp; page).
42  *
43 */
44 public final class LocaleAction extends Action {
45
46     /**
47      * Commons Logging instance.
48     */
49     private Log log = LogFactory.getFactory().getInstance(this.getClass().getName());
50
51     /**
52      * <p>
53      * Change the user's {@link java.util.Locale} based on {@link ActionForm}
54      * properties.
55      * </p>
56      * <p>
57      * This <code>Action</code> looks for <code>language</code> and
58      * <code>country</code> properties on the given form, constructs an
59      * appropriate Locale object, and sets it as the Struts Locale for this
60      * user's session.
61      * Any <code>ActionForm, including a {@link DynaActionForm}, may be used.
62      * </p>
63      * <p>
64      * If a <code>page</code> property is also provided, then after
65      * setting the Locale, control is forwarded to that URI path.
66      * Otherwise, control is forwarded to "success".
67      * </p>
68      *
69      * @param mapping The ActionMapping used to select this instance
70      * @param form The optional ActionForm bean for this request (if any)
71      * @param request The HTTP request we are processing
72      * @param response The HTTP response we are creating
73      *
74      * @return Action to forward to
75      * @exception java.lang.Exception if an input/output error or servlet exception occurs
76      */
77     public ActionForward execute(ActionMapping mapping,
78                  ActionForm form,
79                  HttpServletRequest JavaDoc request,
80                  HttpServletResponse JavaDoc response)
81     throws Exception JavaDoc {
82
83     // Extract attributes we will need
84 HttpSession JavaDoc session = request.getSession();
85     Locale JavaDoc locale = getLocale(request);
86
87     String JavaDoc language = null;
88     String JavaDoc country = null;
89     String JavaDoc page = null;
90
91     try {
92             language = (String JavaDoc)
93               PropertyUtils.getSimpleProperty(form, "language");
94             country = (String JavaDoc)
95               PropertyUtils.getSimpleProperty(form, "country");
96             page = (String JavaDoc)
97               PropertyUtils.getSimpleProperty(form, "page");
98         } catch (Exception JavaDoc e) {
99            log.error(e.getMessage(), e);
100         }
101
102         if ((language != null && language.length() > 0) &&
103             (country != null && country.length() > 0)) {
104            locale = new java.util.Locale JavaDoc(language, country);
105         } else if (language != null && language.length() > 0) {
106            locale = new java.util.Locale JavaDoc(language, "");
107     }
108
109         session.setAttribute(Globals.LOCALE_KEY, locale);
110
111         if (null==page) return mapping.findForward("success");
112         else return new ActionForward(page);
113
114     }
115
116 }
117
Popular Tags