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1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  *
3  * This file is part of the compiler and core tools for the AspectJ(tm)
4  * programming language; see http://aspectj.org
5  *
6  * The contents of this file are subject to the Mozilla Public License
7  * Version 1.1 (the "License"); you may not use this file except in
8  * compliance with the License. You may obtain a copy of the License at
9  * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is AspectJ.
17  *
18  * The Initial Developer of the Original Code is Xerox Corporation. Portions
19  * created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
20  * All Rights Reserved.
21  *
22  * Contributor(s):
23  */
24
25 package org.aspectj.util;
26
27
28 import java.util.*;
29
30 public class CollectionUtil {
31     public static List getListInMap(Map map, Object JavaDoc key) {
32         List list = (List)map.get(key);
33         if (list == null) {
34             list = new ArrayList();
35             map.put(key, list);
36         }
37         return list;
38     }
39
40     public static SortedSet getSortedSetInMap(Map map, Object JavaDoc key) {
41         SortedSet list = (SortedSet)map.get(key);
42         if (list == null) {
43             list = new TreeSet();
44             map.put(key, list);
45         }
46         return list;
47     }
48
49     public static Set getSetInMap(Map map, Object JavaDoc key) {
50         Set list = (Set)map.get(key);
51         if (list == null) {
52             list = new HashSet();
53             map.put(key, list);
54         }
55         return list;
56     }
57
58     public static Map getMapInMap(Map map, Object JavaDoc key) {
59         Map list = (Map)map.get(key);
60         if (list == null) {
61             list = new HashMap();
62             map.put(key, list);
63         }
64         return list;
65     }
66 }
67
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