001/* 002 * Copyright 2002-2018 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.server.i18n; 018 019import java.util.Locale; 020import java.util.TimeZone; 021 022import org.springframework.context.i18n.LocaleContext; 023import org.springframework.context.i18n.TimeZoneAwareLocaleContext; 024import org.springframework.lang.Nullable; 025import org.springframework.util.Assert; 026import org.springframework.web.server.ServerWebExchange; 027 028/** 029 * {@link LocaleContextResolver} implementation that always returns a fixed locale 030 * and optionally time zone. Default is the current JVM's default locale. 031 * 032 * <p>Note: Does not support {@link #setLocaleContext}, as the fixed locale and 033 * time zone cannot be changed. 034 * 035 * @author Sebastien Deleuze 036 * @since 5.0 037 */ 038public class FixedLocaleContextResolver implements LocaleContextResolver { 039 040 private final Locale locale; 041 042 @Nullable 043 private final TimeZone timeZone; 044 045 046 /** 047 * Create a default FixedLocaleResolver, exposing a configured default 048 * locale (or the JVM's default locale as fallback). 049 */ 050 public FixedLocaleContextResolver() { 051 this(Locale.getDefault()); 052 } 053 054 /** 055 * Create a FixedLocaleResolver that exposes the given locale. 056 * @param locale the locale to expose 057 */ 058 public FixedLocaleContextResolver(Locale locale) { 059 this(locale, null); 060 } 061 062 /** 063 * Create a FixedLocaleResolver that exposes the given locale and time zone. 064 * @param locale the locale to expose 065 * @param timeZone the time zone to expose 066 */ 067 public FixedLocaleContextResolver(Locale locale, @Nullable TimeZone timeZone) { 068 Assert.notNull(locale, "Locale must not be null"); 069 this.locale = locale; 070 this.timeZone = timeZone; 071 } 072 073 074 @Override 075 public LocaleContext resolveLocaleContext(ServerWebExchange exchange) { 076 return new TimeZoneAwareLocaleContext() { 077 @Override 078 public Locale getLocale() { 079 return locale; 080 } 081 @Override 082 @Nullable 083 public TimeZone getTimeZone() { 084 return timeZone; 085 } 086 }; 087 } 088 089 @Override 090 public void setLocaleContext(ServerWebExchange exchange, @Nullable LocaleContext localeContext) { 091 throw new UnsupportedOperationException( 092 "Cannot change fixed locale - use a different locale context resolution strategy"); 093 } 094 095}