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}