/*
 * Copyright 2002-2019 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.web.accept;

import java.util.List;

import org.springframework.http.MediaType;

/**
 * Strategy to resolve a {@link MediaType} to a list of file extensions &mdash;
 * for example, to resolve "application/json" to "json".
 *
 * @author Rossen Stoyanchev
 * @since 3.2
 */
public interface MediaTypeFileExtensionResolver {

	/**
	 * Resolve the given media type to a list of file extensions.
	 * @param mediaType the media type to resolve
	 * @return a list of extensions or an empty list (never {@code null})
	 */
	List<String> resolveFileExtensions(MediaType mediaType);

	/**
	 * Get all registered file extensions.
	 * @return a list of extensions or an empty list (never {@code null})
	 */
	List<String> getAllFileExtensions();

}
