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Java > Open Source Codes > edu > rice > cs > drjava > ui > InteractionsHistoryFilter


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33
34 package edu.rice.cs.drjava.ui;
35
36 import java.io.File JavaDoc;
37 import javax.swing.filechooser.FileFilter JavaDoc;
38
39
40 /**
41  * A file filter for files with extensions ".hist".
42  * Used in the file choosers for the Interactions History.
43  * @version $Id: InteractionsHistoryFilter.java 3344 2005-07-05 19:07:29Z coolpipe $
44  */
45 public class InteractionsHistoryFilter extends FileFilter JavaDoc {
46
47   /**
48    * Extension to match for History files.
49    */
50   public static final String JavaDoc HIST_EXTENSION = "hist";
51   
52   /**
53    * Returns true if the file matches the Interactions History filter.
54    */
55   public boolean accept(File JavaDoc f) {
56     if (f.isDirectory()) {
57       return true;
58     }
59     String JavaDoc ext = getExtension(f);
60     if ((ext != null) && (ext.equals(HIST_EXTENSION))) {
61       return true;
62     }
63     return false;
64   }
65
66   /**
67    * @return A description of this filter to display
68    */
69   public String JavaDoc getDescription() {
70     return "Interaction History Files";
71   }
72
73   /*
74    * Get the extension of a file.
75    */
76   public static String JavaDoc getExtension(File JavaDoc f) {
77     String JavaDoc ext = null;
78     String JavaDoc s = f.getName();
79     int i = s.lastIndexOf('.');
80     if (i > 0 && i < s.length() - 1) {
81       ext = s.substring(i + 1).toLowerCase();
82     }
83     return ext;
84   }
85 }
86
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