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 com.google.common.base.Strings;
19 import com.google.common.collect.Lists;
20
21 import java.io.File;
22 import java.io.FilenameFilter;
23 import java.util.List;
24
25 /**
26 * Filter to prevent wrong files from being manipulated by this tool. Currently
27 * only files with the extensions {@link #EXTENSIONS}.
28 *
29 * @author hirsch
30 * @version 2011-04-02, 13:52
31 */
32 class ImageFilenameFilter implements FilenameFilter {
33
34 private static final List<String> EXTENSIONS = Lists.newArrayList("jpg", "png");
35
36 /**
37 * Filter filenames in a directory for images.
38 *
39 * @param dir Directory to filter filenames in.
40 * @param name Filename to filter.
41 * @return Return <code>true</code> if the given File is a directory and
42 * the file's prefix is part of {@link #EXTENSIONS}.
43 */
44 public final boolean accept(final File dir, final String name) {
45 return !(Strings.isNullOrEmpty(name) || dir == null) && new File(dir, name).isFile() && isSuffixExifExtractable(name);
46 }
47
48 private static boolean isSuffixExifExtractable(final String name) {
49 if (!Strings.isNullOrEmpty(name)) {
50 String file = name.trim().toLowerCase();
51 for (String suffix : EXTENSIONS) {
52 if (file.endsWith("." + suffix)) {
53 return true;
54 }
55 }
56 }
57 return false;
58
59 }
60 }