01: /**
02: * Copyright (C) 2001 Yasna.com. All rights reserved.
03: *
04: * ===================================================================
05: * The Apache Software License, Version 1.1
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions
09: * 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: */package com.Yasna.forum;
53:
54: import java.util.*;
55:
56: /**
57: * Protection proxy for Forum Moderator iterators. This is a special case
58: * iterator proxy because users might not have read access to some of the
59: * forums that we need to proxy. The expected behavior is that only forums
60: * that users <b>do</b> have read access for will be returned. Therefore,
61: * we need to read in the results and only return an iterator for forums
62: * that the user can read.
63: */
64: class ForumModeratorIteratorProxy extends IteratorProxy {
65:
66: private ArrayList forums = new ArrayList();
67:
68: public ForumModeratorIteratorProxy(Iterator iterator,
69: Authorization authorization, ForumPermissions permissions) {
70: //Dummy call to super-class. This specialized iterator proxy doesn't
71: //use the superclass like the other iterators do.
72: super (iterator, authorization, permissions);
73:
74: while (iterator.hasNext()) {
75: Forum forum = (Forum) iterator.next();
76: ForumPermissions forumPermissions = forum
77: .getPermissions(authorization);
78: //Create a new permissions object with the combination of the
79: //permissions of this object and tempPermissions.
80: //Check and see if the user has READ permissions. If not, throw an
81: //an UnauthorizedException.
82: if (forumPermissions.get(ForumPermissions.SYSTEM_ADMIN)
83: || forumPermissions
84: .get(ForumPermissions.FORUM_ADMIN)
85: || forumPermissions.get(ForumPermissions.MODERATOR)) {
86: ForumProxy proxy = new ForumProxy(forum, authorization,
87: forumPermissions);
88: forums.add(proxy);
89: }
90: }
91:
92: this .iterator = forums.listIterator();
93: }
94:
95: public Object next() throws java.util.NoSuchElementException {
96: return iterator.next();
97: }
98: }
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