001/*
002 * Copyright 2002-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.servlet.view.tiles3;
018
019import java.util.Locale;
020
021import javax.servlet.http.HttpServletRequest;
022
023import org.apache.tiles.locale.impl.DefaultLocaleResolver;
024import org.apache.tiles.request.Request;
025import org.apache.tiles.request.servlet.NotAServletEnvironmentException;
026import org.apache.tiles.request.servlet.ServletUtil;
027
028import org.springframework.web.servlet.support.RequestContextUtils;
029
030/**
031 * Tiles LocaleResolver adapter that delegates to a Spring
032 * {@link org.springframework.web.servlet.LocaleResolver}, exposing the
033 * DispatcherServlet-managed locale.
034 *
035 * <p>This adapter gets automatically registered by {@link TilesConfigurer}.
036 *
037 * @author Nicolas Le Bas
038 * @since 3.2
039 * @see org.apache.tiles.definition.UrlDefinitionsFactory#LOCALE_RESOLVER_IMPL_PROPERTY
040 */
041public class SpringLocaleResolver extends DefaultLocaleResolver {
042
043        @Override
044        public Locale resolveLocale(Request request) {
045                try {
046                        HttpServletRequest servletRequest = ServletUtil.getServletRequest(request).getRequest();
047                        if (servletRequest != null) {
048                                return RequestContextUtils.getLocale(servletRequest);
049                        }
050                }
051                catch (NotAServletEnvironmentException ex) {
052                        // ignore
053                }
054                return super.resolveLocale(request);
055        }
056
057}