1 /*
2 * XNap - A P2P framework and client.
3 *
4 * See the file AUTHORS for copyright information.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 package org.xnap.cmdl;
21
22 import java.util.Iterator;
23 import java.util.TreeSet;
24
25 public class DefaultCompleter implements Completer {
26
27 // --- Data Field(s) ---
28
29 private TreeSet completions = new TreeSet();
30 private Iterator possibleValues;
31
32 // --- Constructor(s) ---
33
34 public DefaultCompleter()
35 {
36 }
37
38 // --- Method(s) ---
39
40 public void add(String completion)
41 {
42 completions.add(completion);
43 }
44
45 public void remove(String completion)
46 {
47 completions.remove(completion);
48 }
49
50 public String[] getCompletions()
51 {
52 return (String[])completions.toArray(new String[0]);
53 }
54
55 /***
56 *
57 */
58 public String completer(String text, int state)
59 {
60 if (state == 0) {
61 // first call to completer(): initialize our choices-iterator
62 possibleValues = completions.tailSet(text).iterator();
63 }
64
65 if (possibleValues.hasNext()) {
66 String nextKey = (String)possibleValues.next();
67 if (nextKey.startsWith(text))
68 return nextKey;
69 }
70
71 return null;
72 }
73
74 }