/* * Copyright 2002-2016 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.messaging.converter; import org.springframework.messaging.MessageHeaders; 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} of {@code null} if none found * * @throws org.springframework.util.InvalidMimeTypeException if the content type * is a String that cannot be parsed * @throws java.lang.IllegalArgumentException if there is a content type but * its type is unknown */ MimeType resolve(MessageHeaders headers); }