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/*
 * Copyright 2002-2006 the original author or authors.
 *
 * Licensed 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.springframework.web.servlet;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Interface for web-based locale resolution strategies that allows for
 * both locale resolution via the request and locale modification via
 * request and response.
 *
 * 

This interface allows for implementations based on request, session, * cookies, etc. The default implementation is AcceptHeaderLocaleResolver, * simply using the request's locale provided by the respective HTTP header. * *

Use RequestContext.getLocale() to retrieve the current locale * in controllers or views, independent of the actual resolution strategy. * * @author Juergen Hoeller * @since 27.02.2003 * @see org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver * @see org.springframework.web.servlet.support.RequestContext#getLocale */ public interface LocaleResolver { /** * Resolve the current locale via the given request. * Should return a default locale as fallback in any case. * @param request the request to resolve the locale for * @return the current locale (never null) */ Locale resolveLocale(HttpServletRequest request); /** * Set the current locale to the given one. * @param request the request to be used for locale modification * @param response the response to be used for locale modification * @param locale the new locale, or null to clear the locale * @throws UnsupportedOperationException if the LocaleResolver implementation * does not support dynamic changing of the theme */ void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale); }





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