spring LocaleContextResolver 源码

2022-08-08
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spring LocaleContextResolver 代码

文件路径：/spring-web/src/main/java/org/springframework/web/server/i18n/LocaleContextResolver.java

/*
 * Copyright 2002-2017 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
 *
 *      https://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.server.i18n;

import org.springframework.context.i18n.LocaleContext;
import org.springframework.lang.Nullable;
import org.springframework.web.server.ServerWebExchange;

/**
 * Interface for web-based locale context resolution strategies that allows
 * for both locale context resolution via the request and locale context modification
 * via the HTTP exchange.
 *
 * <p>The {@link org.springframework.context.i18n.LocaleContext} object can potentially
 * include associated time zone and other locale related information.
 *
 * @author Sebastien Deleuze
 * @since 5.0
 * @see LocaleContext
 */
public interface LocaleContextResolver {

	/**
	 * Resolve the current locale context via the given exchange.
	 * <p>The returned context may be a
	 * {@link org.springframework.context.i18n.TimeZoneAwareLocaleContext},
	 * containing a locale with associated time zone information.
	 * Simply apply an {@code instanceof} check and downcast accordingly.
	 * <p>Custom resolver implementations may also return extra settings in
	 * the returned context, which again can be accessed through downcasting.
	 * @param exchange current server exchange
	 * @return the current locale context (never {@code null})
	 */
	LocaleContext resolveLocaleContext(ServerWebExchange exchange);

	/**
	 * Set the current locale context to the given one,
	 * potentially including a locale with associated time zone information.
	 * @param exchange current server exchange
	 * @param localeContext the new locale context, or {@code null} to clear the locale
	 * @throws UnsupportedOperationException if the LocaleResolver implementation
	 * does not support dynamic changing of the locale or time zone
	 * @see org.springframework.context.i18n.SimpleLocaleContext
	 * @see org.springframework.context.i18n.SimpleTimeZoneAwareLocaleContext
	 */
	void setLocaleContext(ServerWebExchange exchange, @Nullable LocaleContext localeContext);

}

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所属分类： 后端技术
本文标签： Java Spring
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