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Java > Open Source Codes > com > Yasna > forum > ForumModeratorIteratorProxy


1 /**
2  * Copyright (C) 2001 Yasna.com. All rights reserved.
3  *
4  * ===================================================================
5  * The Apache Software License, Version 1.1
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  *
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in
16  * the documentation and/or other materials provided with the
17  * distribution.
18  *
19  * 3. The end-user documentation included with the redistribution,
20  * if any, must include the following acknowledgment:
21  * "This product includes software developed by
22  * Yasna.com (http://www.Yasna.com)."
23  * Alternately, this acknowledgment may appear in the software itself,
24  * if and wherever such third-party acknowledgments normally appear.
25  *
26  * 4. The names "Yazd" and "Yasna.com" must not be used to
27  * endorse or promote products derived from this software without
28  * prior written permission. For written permission, please
29  * contact support@Yasna.com.
30  *
31  * 5. Products derived from this software may not be called "Yazd",
32  * nor may "Yazd" appear in their name, without prior written
33  * permission of Yasna.com.
34  *
35  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38  * DISCLAIMED. IN NO EVENT SHALL YASNA.COM OR
39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46  * SUCH DAMAGE.
47  * ====================================================================
48  *
49  * This software consists of voluntary contributions made by many
50  * individuals on behalf of Yasna.com. For more information
51  * on Yasna.com, please see <http://www.yasna.com>.
52  */
53
54 package com.Yasna.forum;
55
56 import java.util.*;
57
58 /**
59  * Protection proxy for Forum Moderator iterators. This is a special case
60  * iterator proxy because users might not have read access to some of the
61  * forums that we need to proxy. The expected behavior is that only forums
62  * that users <b>do</b> have read access for will be returned. Therefore,
63  * we need to read in the results and only return an iterator for forums
64  * that the user can read.
65  */
66 class ForumModeratorIteratorProxy extends IteratorProxy {
67
68     private ArrayList forums = new ArrayList();
69
70     public ForumModeratorIteratorProxy(Iterator iterator, Authorization
71         authorization, ForumPermissions permissions)
72     {
73         //Dummy call to super-class. This specialized iterator proxy doesn't
74 //use the superclass like the other iterators do.
75 super(iterator, authorization, permissions);
76
77         while (iterator.hasNext()) {
78             Forum forum = (Forum)iterator.next();
79             ForumPermissions forumPermissions = forum.getPermissions(authorization);
80             //Create a new permissions object with the combination of the
81 //permissions of this object and tempPermissions.
82 //Check and see if the user has READ permissions. If not, throw an
83 //an UnauthorizedException.
84 if (forumPermissions.get(ForumPermissions.SYSTEM_ADMIN)||
85         forumPermissions.get(ForumPermissions.FORUM_ADMIN)||
86         forumPermissions.get(ForumPermissions.MODERATOR)){
87                 ForumProxy proxy = new ForumProxy(forum, authorization, forumPermissions);
88                 forums.add(proxy);
89         }
90         }
91
92         this.iterator = forums.listIterator();
93     }
94
95     public Object JavaDoc next() throws java.util.NoSuchElementException JavaDoc {
96         return iterator.next();
97     }
98 }
99
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