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19
20
21
22 package org.apache.james.mailrepository.filepair;
23
24 import java.io.File;
25 import java.io.FilenameFilter;
26
27 /**
28 * This filters files based on the extension and is tailored to provide
29 * backwards compatibility of the numbered repositories that Avalon does.
30 *
31 */
32 public class NumberedRepositoryFileFilter implements FilenameFilter {
33 private String postfix;
34 private String prefix;
35
36 /**
37 * Default Constructor
38 *
39 * @param extension the extension for which checked
40 */
41 public NumberedRepositoryFileFilter(final String extension) {
42 postfix = extension;
43 prefix = ".Repository";
44 }
45
46 /**
47 * @see java.io.FilenameFilter#accept(File, String)
48 */
49 public boolean accept(final File file, final String name) {
50 //System.out.println("check: " + name);
51 //System.out.println("post: " + postfix);
52 if (!name.endsWith(postfix)) {
53 return false;
54 }
55 //Look for a couple of digits next
56 int pos = name.length() - postfix.length();
57 //We have to find at least one digit... if not then this isn't what we want
58 if (!Character.isDigit(name.charAt(pos - 1))) {
59 return false;
60 }
61 pos--;
62 while (pos >= 1 && Character.isDigit(name.charAt(pos - 1))) {
63 //System.out.println("back one");
64 pos--;
65 }
66 //System.out.println("sub: " + name.substring(0, pos));
67 //Now want to check that we match the rest
68 return name.substring(0, pos).endsWith(prefix);
69 }
70 }
71
72