001: /*
002: * $Id: LocaleAction.java 471754 2006-11-06 14:55:09Z husted $
003: *
004: * Licensed to the Apache Software Foundation (ASF) under one
005: * or more contributor license agreements. See the NOTICE file
006: * distributed with this work for additional information
007: * regarding copyright ownership. The ASF licenses this file
008: * to you under the Apache License, Version 2.0 (the
009: * "License"); you may not use this file except in compliance
010: * with the License. You may obtain a copy of the License at
011: *
012: * http://www.apache.org/licenses/LICENSE-2.0
013: *
014: * Unless required by applicable law or agreed to in writing,
015: * software distributed under the License is distributed on an
016: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017: * KIND, either express or implied. See the License for the
018: * specific language governing permissions and limitations
019: * under the License.
020: */
021:
022: package org.apache.struts.webapp.validator;
023:
024: import java.util.Locale;
025:
026: import javax.servlet.http.HttpServletRequest;
027: import javax.servlet.http.HttpServletResponse;
028: import javax.servlet.http.HttpSession;
029:
030: import org.apache.commons.beanutils.PropertyUtils;
031: import org.apache.commons.logging.Log;
032: import org.apache.commons.logging.LogFactory;
033: import org.apache.struts.Globals;
034: import org.apache.struts.action.Action;
035: import org.apache.struts.action.ActionForm;
036: import org.apache.struts.action.ActionForward;
037: import org.apache.struts.action.ActionMapping;
038:
039: /**
040: * Implementation of <strong>Action</strong> that changes the user's
041: * {@link java.util.Locale} and forwards to a page, based on request level
042: * parameters that are set (language, country, & page).
043: *
044: */
045: public final class LocaleAction extends Action {
046:
047: /**
048: * Commons Logging instance.
049: */
050: private Log log = LogFactory.getFactory().getInstance(
051: this .getClass().getName());
052:
053: /**
054: * <p>
055: * Change the user's {@link java.util.Locale} based on {@link ActionForm}
056: * properties.
057: * </p>
058: * <p>
059: * This <code>Action</code> looks for <code>language</code> and
060: * <code>country</code> properties on the given form, constructs an
061: * appropriate Locale object, and sets it as the Struts Locale for this
062: * user's session.
063: * Any <code>ActionForm, including a {@link DynaActionForm}, may be used.
064: * </p>
065: * <p>
066: * If a <code>page</code> property is also provided, then after
067: * setting the Locale, control is forwarded to that URI path.
068: * Otherwise, control is forwarded to "success".
069: * </p>
070: *
071: * @param mapping The ActionMapping used to select this instance
072: * @param form The optional ActionForm bean for this request (if any)
073: * @param request The HTTP request we are processing
074: * @param response The HTTP response we are creating
075: *
076: * @return Action to forward to
077: * @exception java.lang.Exception if an input/output error or servlet exception occurs
078: */
079: public ActionForward execute(ActionMapping mapping,
080: ActionForm form, HttpServletRequest request,
081: HttpServletResponse response) throws Exception {
082:
083: // Extract attributes we will need
084: HttpSession session = request.getSession();
085: Locale locale = getLocale(request);
086:
087: String language = null;
088: String country = null;
089: String page = null;
090:
091: try {
092: language = (String) PropertyUtils.getSimpleProperty(form,
093: "language");
094: country = (String) PropertyUtils.getSimpleProperty(form,
095: "country");
096: page = (String) PropertyUtils.getSimpleProperty(form,
097: "page");
098: } catch (Exception e) {
099: 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)
112: return mapping.findForward("success");
113: else
114: return new ActionForward(page);
115:
116: }
117:
118: }
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