org.springframework.web.reactive.accept.RequestedContentTypeResolver Maven / Gradle / Ivy
/*
* 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
*
* 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.reactive.accept;
import java.util.Collections;
import java.util.List;
import org.springframework.http.MediaType;
import org.springframework.web.server.NotAcceptableStatusException;
import org.springframework.web.server.ServerWebExchange;
/**
* Strategy to resolve the requested media types for a {@code ServerWebExchange}.
*
* See {@link RequestedContentTypeResolverBuilder} to create a sequence of
* strategies.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public interface RequestedContentTypeResolver {
/**
* 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 MEDIA_TYPE_ALL_LIST = Collections.singletonList(MediaType.ALL);
/**
* Resolve the given request to a list of requested media types. The returned
* list is ordered by specificity first and by quality parameter second.
* @param exchange the current exchange
* @return the requested media types, or {@link #MEDIA_TYPE_ALL_LIST} if none
* were requested.
* @throws NotAcceptableStatusException if the requested media type is invalid
*/
List resolveMediaTypes(ServerWebExchange exchange);
}