001/* 002 * Copyright 2002-2017 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.i18n; 018 019import java.util.Locale; 020import java.util.TimeZone; 021 022import javax.servlet.http.HttpServletRequest; 023import javax.servlet.http.HttpServletResponse; 024 025import org.springframework.context.i18n.SimpleLocaleContext; 026import org.springframework.lang.Nullable; 027import org.springframework.web.servlet.LocaleContextResolver; 028 029/** 030 * Abstract base class for {@link LocaleContextResolver} implementations. 031 * Provides support for a default locale and a default time zone. 032 * 033 * <p>Also provides pre-implemented versions of {@link #resolveLocale} and {@link #setLocale}, 034 * delegating to {@link #resolveLocaleContext} and {@link #setLocaleContext}. 035 * 036 * @author Juergen Hoeller 037 * @since 4.0 038 * @see #setDefaultLocale 039 * @see #setDefaultTimeZone 040 */ 041public abstract class AbstractLocaleContextResolver extends AbstractLocaleResolver implements LocaleContextResolver { 042 043 @Nullable 044 private TimeZone defaultTimeZone; 045 046 047 /** 048 * Set a default TimeZone that this resolver will return if no other time zone found. 049 */ 050 public void setDefaultTimeZone(@Nullable TimeZone defaultTimeZone) { 051 this.defaultTimeZone = defaultTimeZone; 052 } 053 054 /** 055 * Return the default TimeZone that this resolver is supposed to fall back to, if any. 056 */ 057 @Nullable 058 public TimeZone getDefaultTimeZone() { 059 return this.defaultTimeZone; 060 } 061 062 063 @Override 064 public Locale resolveLocale(HttpServletRequest request) { 065 Locale locale = resolveLocaleContext(request).getLocale(); 066 return (locale != null ? locale : request.getLocale()); 067 } 068 069 @Override 070 public void setLocale(HttpServletRequest request, @Nullable HttpServletResponse response, @Nullable Locale locale) { 071 setLocaleContext(request, response, (locale != null ? new SimpleLocaleContext(locale) : null)); 072 } 073 074}