001/*
002 * Copyright 2002-2017 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.messaging.converter;
018
019import org.springframework.messaging.MessageHeaders;
020import org.springframework.util.InvalidMimeTypeException;
021import org.springframework.util.MimeType;
022
023/**
024 * Resolve the content type for a message.
025 *
026 * @author Rossen Stoyanchev
027 * @since 4.0
028 */
029public interface ContentTypeResolver {
030
031        /**
032         * Determine the {@link MimeType} of a message from the given MessageHeaders.
033         * @param headers the headers to use for the resolution
034         * @return the resolved {@code MimeType}, or {@code null} if none found
035         * @throws InvalidMimeTypeException if the content type is a String that cannot be parsed
036         * @throws IllegalArgumentException if there is a content type but its type is unknown
037         */
038        MimeType resolve(MessageHeaders headers) throws InvalidMimeTypeException;
039
040}