01 package net.sourceforge.pmd.util;
02
03 import java.io.File;
04 import java.io.FilenameFilter;
05 import java.util.ArrayList;
06 import java.util.List;
07
08 /**
09 * A utility class for finding files within a directory.
10 */
11 public class FileFinder {
12
13 private FilenameFilter filter;
14 private static final String FILE_SEP = System.getProperty("file.separator");
15
16 public List<File> findFilesFrom(String dir, FilenameFilter filter, boolean recurse) {
17 this.filter = filter;
18 List<File> files = new ArrayList<File>();
19 scanDirectory(new File(dir), files, recurse);
20 return files;
21 }
22
23 /**
24 * Implements a tail recursive file scanner
25 */
26 private void scanDirectory(File dir, List<File> list, boolean recurse) {
27 String[] candidates = dir.list(filter);
28 if (candidates == null) {
29 return;
30 }
31 for (int i = 0; i < candidates.length; i++) {
32 File tmp = new File(dir + FILE_SEP + candidates[i]);
33 if (tmp.isDirectory()) {
34 if (recurse) {
35 scanDirectory(tmp, list, true);
36 }
37 } else {
38 list.add(new File(dir + FILE_SEP + candidates[i]));
39 }
40 }
41 }
42 }
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