1 //
2 //Copyright (c) 2003, Caltha - Gajda, Krzewski, Mach, Potempski Sp.J.
3 //All rights reserved.
4 //
5 //Redistribution and use in source and binary forms, with or without modification,
6 //are permitted provided that the following conditions are met:
7 //
8 //* Redistributions of source code must retain the above copyright notice,
9 //this list of conditions and the following disclaimer.
10 //* Redistributions in binary form must reproduce the above copyright notice,
11 //this list of conditions and the following disclaimer in the documentation
12 //and/or other materials provided with the distribution.
13 //* Neither the name of the Caltha - Gajda, Krzewski, Mach, Potempski Sp.J.
14 //nor the names of its contributors may be used to endorse or promote products
15 //derived from this software without specific prior written permission.
16 //
17 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 //AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 //WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 //IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21 //INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 //BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
23 //OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 //WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 //ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 //POSSIBILITY OF SUCH DAMAGE.
27 //
28
29 package org.objectledge.utils;
30
31 import java.util.HashMap;
32 import java.util.Iterator;
33 import java.util.List;
34 import java.util.Map;
35
36 /**
37 * This class contains various functions for collections.
38 *
39 * @author <a href="mailto:damian@caltha.pl">Damian Gajda</a>
40 * @author <a href="mailto:rafal@caltha.pl">Rafal Krzewski</a>
41 * @author <a href="mailto:pablo@caltha.pl">Pawel Potempski</a>
42 *
43 * @version $Id: CollectionUtils.java,v 1.2 2005/03/04 18:52:31 zwierzem Exp $
44 */
45 public class CollectionUtils
46 {
47 /***
48 * A private constructor to prevent instantiation of this static method only class.
49 */
50 private CollectionUtils()
51 {
52 // static access only
53 }
54
55 /***
56 * Converst a list of two element lists (key, value) into a map.
57 *
58 * @param list the list
59 * @return a map
60 */
61 public static Map listToMap(List list)
62 {
63 Map map = new HashMap(list.size());
64 Iterator i = list.iterator();
65 while(i.hasNext())
66 {
67 List l = (List)i.next();
68 map.put(l.get(0), l.get(1));
69 }
70 return map;
71 }
72 }