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Java > Open Source Codes > org > blojsom > plugin > permission > PermissionChecker


1 /**
2  * Copyright (c) 2003-2006, David A. Czarnecki
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * Redistributions of source code must retain the above copyright notice, this list of conditions and the
9  * following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
11  * following disclaimer in the documentation and/or other materials provided with the distribution.
12  * Neither the name of "David A. Czarnecki" and "blojsom" nor the names of its contributors may be used to
13  * endorse or promote products derived from this software without specific prior written permission.
14  * Products derived from this software may not be called "blojsom", nor may "blojsom" appear in their name,
15  * without prior written permission of David A. Czarnecki.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
18  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
19  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21  * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 package org.blojsom.plugin.permission;
32
33 import org.blojsom.authorization.AuthorizationProvider;
34 import org.blojsom.authorization.AuthorizationException;
35 import org.blojsom.blog.Blog;
36
37 import java.util.Map JavaDoc;
38
39 /**
40  * Permission Checker plugin
41  *
42  * @author David Czarnecki
43  * @version $Id: PermissionChecker.java,v 1.1 2006/03/20 21:30:57 czarneckid Exp $
44  * @since blojsom 3.0
45  */
46 public class PermissionChecker {
47
48     private Blog _blog;
49     private AuthorizationProvider _authorizationProvider;
50     private Map JavaDoc _permissionContext;
51
52     /**
53      * Create a new permission checker for a given blog
54      *
55      * @param blogUser {@link Blog}
56      * @param authorizationProvider {@link AuthorizationProvider}
57      * @param permissionContext Context for permissions to be evaulated in (not-used)
58      */
59     public PermissionChecker(Blog blog, AuthorizationProvider authorizationProvider, Map JavaDoc permissionContext) {
60         _blog = blog;
61         _authorizationProvider = authorizationProvider;
62         _permissionContext = permissionContext;
63     }
64
65     /**
66      * Check permission for a given username and permission
67      *
68      * @param username Username
69      * @param permission Permission to check
70      * @return <code>true</code> if <code>username</code> has given <code>permission</code>, <code>false</code> otherwise
71      */
72     public boolean checkPermission(String JavaDoc username, String JavaDoc permission) {
73         try {
74             _authorizationProvider.checkPermission(_blog, _permissionContext, username, permission);
75         } catch (AuthorizationException e) {
76             return false;
77         }
78
79         return true;
80     }
81 }
82
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