1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.vfs2.impl;
18
19 import java.net.URLConnection;
20
21 import org.apache.commons.vfs2.FileContent;
22 import org.apache.commons.vfs2.FileContentInfo;
23 import org.apache.commons.vfs2.FileContentInfoFactory;
24
25 /**
26 * The FileContentInfoFilenameFactory.
27 * <p>
28 * Uses the file name extension to determine the content-type. The content-encoding is not resolved.
29 * </p>
30 */
31 public class FileContentInfoFilenameFactory implements FileContentInfoFactory {
32
33 private static final FileContentInfo NULL_INSTANCE = new DefaultFileContentInfo(null, null);
34
35 @Override
36 public FileContentInfo create(final FileContent fileContent) {
37 String contentType = null;
38
39 final String name = fileContent.getFile().getName().getBaseName();
40 if (name != null) {
41 contentType = URLConnection.getFileNameMap().getContentTypeFor(name);
42 }
43
44 // optimize object creation for common case
45 if (contentType == null) {
46 return NULL_INSTANCE;
47 }
48 return new DefaultFileContentInfo(contentType, null);
49 }
50 }