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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  }