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20 package org.apache.struts.webapp.validator;
21
22 import java.util.Locale;
23
24 import javax.servlet.http.HttpServletRequest;
25 import javax.servlet.http.HttpServletResponse;
26 import javax.servlet.http.HttpSession;
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, & 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 request,
80 HttpServletResponse response)
81 throws Exception {
82
83
84 HttpSession session = request.getSession();
85 Locale locale = getLocale(request);
86
87 String language = null;
88 String country = null;
89 String page = null;
90
91 try {
92 language = (String)
93 PropertyUtils.getSimpleProperty(form, "language");
94 country = (String)
95 PropertyUtils.getSimpleProperty(form, "country");
96 page = (String)
97 PropertyUtils.getSimpleProperty(form, "page");
98 } catch (Exception 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(language, country);
105 } else if (language != null && language.length() > 0) {
106 locale = new java.util.Locale(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 }