NumberedRepositoryFileFilter


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17  
18  package org.apache.james.mailrepository.filepair;
19  
20  import java.io.File  ;
21  import java.io.FilenameFilter  ;
22  
23  /**
24   * This filters files based on the extension and is tailored to provide
25   * backwards compatibility of the numbered repositories that Avalon does.
26   *
27   */
28  public class NumberedRepositoryFileFilter implements FilenameFilter   {
29      private String   postfix;
30      private String   prefix;
31  
32      public NumberedRepositoryFileFilter(final String   extension) {
33          postfix = extension;
34          prefix = "." + RepositoryManager.getName();
35      }
36  
37      public boolean accept(final File   file, final String   name) {
38          //System.out.println("check: " + name);
39          //System.out.println("post: " + postfix);
40          if (!name.endsWith(postfix)) {
41              return false;
42          }
43          //Look for a couple of digits next
44          int pos = name.length() - postfix.length();
45          //We have to find at least one digit... if not then this isn't what we want
46          if (!Character.isDigit(name.charAt(pos - 1))) {
47              return false;
48          }
49          pos--;
50          while (pos >= 1 && Character.isDigit(name.charAt(pos - 1))) {
51              //System.out.println("back one");
52              pos--;
53          }
54          //System.out.println("sub: " + name.substring(0, pos));
55          //Now want to check that we match the rest
56          return name.substring(0, pos).endsWith(prefix);
57      }
58  }
59  
60  
61
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