Source code: juju/reattore/util/MapOfLists.java
1 /* Reattore HTTP Server
2
3 Copyright (C) 2002 Michael Hope <michaelh@juju.net.nz>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
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 $Id: MapOfLists.java,v 1.2 2003/03/05 05:06:16 michaelh Exp $
20 */
21 package juju.reattore.util;
22
23 import java.util.*;
24
25 /** Indexed set of Lists.
26 */
27 public class MapOfLists {
28
29 private Map top = new LinkedHashMap();
30
31 private List subGet(Object key) {
32 List ret = (List)top.get(key);
33
34 if (ret == null) {
35 ret = new ArrayList();
36 top.put(key, ret);
37 }
38
39 return ret;
40 }
41
42 /** Adds a new element to the List identified by 'obj'
43
44 @param key List key
45 @param obj Object to add.
46 */
47 public void add(Object key, Object obj) {
48 subGet(key).add(obj);
49 }
50
51 /** All of the lists in order created.
52
53 @return Set of Map.Entry
54 */
55 public Set entrySet() {
56 return top.entrySet();
57 }
58
59 /** Fetch a list by key.
60
61 @param key List key
62 @return The list for the key.
63 */
64 public List get(Object key) {
65 return subGet(key);
66 }
67 }
68