spring ContentNegotiationStrategy 源码
spring ContentNegotiationStrategy 代码
文件路径：/spring-web/src/main/java/org/springframework/web/accept/ContentNegotiationStrategy.java
/*
* Copyright 2002-2018 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.accept;
import java.util.Collections;
import java.util.List;
import org.springframework.http.MediaType;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.context.request.NativeWebRequest;
/**
* A strategy for resolving the requested media types for a request.
*
* @author Rossen Stoyanchev
* @since 3.2
*/
@FunctionalInterface
public interface ContentNegotiationStrategy {
/**
* A singleton list with {@link MediaType#ALL} that is returned from
* {@link #resolveMediaTypes} when no specific media types are requested.
* @since 5.0.5
*/
List<MediaType> MEDIA_TYPE_ALL_LIST = Collections.singletonList(MediaType.ALL);
/**
* Resolve the given request to a list of media types. The returned list is
* ordered by specificity first and by quality parameter second.
* @param webRequest the current request
* @return the requested media types, or {@link #MEDIA_TYPE_ALL_LIST} if none
* were requested.
* @throws HttpMediaTypeNotAcceptableException if the requested media
* types cannot be parsed
*/
List<MediaType> resolveMediaTypes(NativeWebRequest webRequest)
throws HttpMediaTypeNotAcceptableException;
}
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