selectlocale.java.svn-base

MVC开源框架

/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.struts.chain.commands.servlet;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.Globals;
import org.apache.struts.chain.commands.AbstractSelectLocale;
import org.apache.struts.chain.contexts.ActionContext;
import org.apache.struts.chain.contexts.ServletActionContext;

import javax.servlet.http.HttpSession;

import java.util.Locale;

/**
 * <p>Select the <code>Locale</code> to be used for this request.</p>
 *
 * @version $Rev$ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
 *          $
 */
public class SelectLocale extends AbstractSelectLocale {
    private static final Log log = LogFactory.getLog(SelectLocale.class);

    // ------------------------------------------------------- Protected Methods

    /**
     * <p>Return the <code>Locale</code> to be used for this request.</p>
     *
     * @param context The <code>Context</code> for this request
     */
    protected Locale getLocale(ActionContext context) {
        ServletActionContext saContext = (ServletActionContext) context;

        // Has a Locale already been selected?
        HttpSession session = saContext.getRequest().getSession();
        Locale locale = (Locale) session.getAttribute(Globals.LOCALE_KEY);

        if (locale != null) {
            return (locale);
        }

        // Select and cache the Locale to be used
        locale = saContext.getRequest().getLocale();

        if (locale == null) {
            locale = Locale.getDefault();
        }

        session.setAttribute(Globals.LOCALE_KEY, locale);

        return (locale);
    }
}