spring ContentTypeResolver 源码
spring ContentTypeResolver 代码
文件路径：/spring-messaging/src/main/java/org/springframework/messaging/converter/ContentTypeResolver.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.messaging.converter;
import org.springframework.lang.Nullable;
import org.springframework.messaging.MessageHeaders;
import org.springframework.util.InvalidMimeTypeException;
import org.springframework.util.MimeType;
/**
* Resolve the content type for a message.
*
* @author Rossen Stoyanchev
* @since 4.0
*/
@FunctionalInterface
public interface ContentTypeResolver {
/**
* Determine the {@link MimeType} of a message from the given MessageHeaders.
* @param headers the headers to use for the resolution
* @return the resolved {@code MimeType}, or {@code null} if none found
* @throws InvalidMimeTypeException if the content type is a String that cannot be parsed
* @throws IllegalArgumentException if there is a content type but its type is unknown
*/
@Nullable
MimeType resolve(@Nullable MessageHeaders headers) throws InvalidMimeTypeException;
}
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