1 /**
2 * Copyright 2011, Aiki IT, FotoRenamer
3 * <p/>
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 * <p/>
8 * http://www.apache.org/licenses/LICENSE-2.0
9 * <p/>
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.aikiit.fotorenamer.image;
17
18 import de.aikiit.fotorenamer.exception.InvalidDirectoryException;
19 import de.aikiit.fotorenamer.exception.NoFilesFoundException;
20 import org.apache.logging.log4j.LogManager;
21 import org.apache.logging.log4j.Logger;
22
23 import java.io.File;
24 import java.io.IOException;
25
26 /**
27 * This class transforms picture file names. All relevant files
28 * in the target directory get a new file name - if correct
29 * metadata can be extracted from the files' EXIF file headers.
30 * <br>
31 * A picture <code>foo.jpg</code> is renamed to
32 * <code>201108111100_foo.jpg</code> if the picture's creation date
33 * was 2011-08-11 11:00.
34 * <br>
35 * Files without EXIF metadata are not touched at all.
36 *
37 * @author hirsch
38 * @version 2011-06-02, 13:22
39 */
40 public final class CreationDateFromExifImageRenamer extends AbstractImageRenamer {
41
42 /** Logger for this class. */
43 private static final Logger LOG =
44 LogManager.getLogger(CreationDateFromExifImageRenamer.class);
45
46 /**
47 * The given directory is scanned for image files that
48 * are processed.
49 *
50 * @param targetDirectory Name of the directory to work on.
51 * @throws InvalidDirectoryException If there's a problem with the directory
52 * selected.
53 * @throws NoFilesFoundException if the selected directory is empty.
54 */
55 public CreationDateFromExifImageRenamer(final String targetDirectory) throws
56 InvalidDirectoryException, NoFilesFoundException {
57 super(targetDirectory);
58 }
59
60 /**
61 * Extracts creation date from EXIF information and returns new filename. If
62 * an error occurs during EXIF data extraction the original filename is
63 * returned.
64 *
65 * @param imageFile Filename to renameFiles according to the subclass
66 * implementation.
67 * @return New filename that includes the image's creation date.
68 * @see MetaDataExtractor for more information about the file format.
69 */
70 @Override
71 public final String renameImage(final File imageFile) {
72 String newImageName = imageFile.getName();
73 LOG.info("Start renaming in CreationDateFromExifImageRenamer");
74
75 try {
76 newImageName = MetaDataExtractor.generateCreationDateInCorrectFormat(imageFile);
77 } catch (IOException e) {
78 LOG.error("Error during exif date extraction: ", e);
79 return newImageName;
80 }
81
82 return newImageName;
83 }
84 }