001// Licensed under the Apache License, Version 2.0 (the "License");
002// you may not use this file except in compliance with the License.
003// You may obtain a copy of the License at
004//
005// http://www.apache.org/licenses/LICENSE-2.0
006//
007// Unless required by applicable law or agreed to in writing, software
008// distributed under the License is distributed on an "AS IS" BASIS,
009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
010// See the License for the specific language governing permissions and
011// limitations under the License.
012
013package org.apache.tapestry5.services.assets;
014
015import org.apache.tapestry5.commons.Resource;
016import org.apache.tapestry5.http.services.Context;
017import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
018
019/**
020 * Used to determine the MIME content type for a resource. The service configuration is the first step,
021 * followed by {@link Context#getMimeType(String)}, and then (finally) "application/octet-stream"
022 * as a stop-gap.
023 *
024 * The service configuration maps the file extension (e.g., "png") to its corresponding MIME type (e.g., "image/png");
025 */
026@UsesMappedConfiguration(String.class)
027public interface ContentTypeAnalyzer
028{
029    /**
030     * Analyze the resource to determine its content type.
031     * 
032     * @param resource
033     *            to analyze
034     * @return a MIME content type
035     */
036    String getContentType(Resource resource);
037}