01: /**
02: * Copyright (c) 2003-2007, David A. Czarnecki
03: * All rights reserved.
04: *
05: * Redistribution and use in source and binary forms, with or without
06: * modification, are permitted provided that the following conditions are met:
07: *
08: * Redistributions of source code must retain the above copyright notice, this list of conditions and the
09: * 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: */package org.blojsom.plugin.permission;
31:
32: import org.blojsom.authorization.AuthorizationProvider;
33: import org.blojsom.authorization.AuthorizationException;
34: import org.blojsom.blog.Blog;
35:
36: import java.util.Map;
37:
38: /**
39: * Permission Checker plugin
40: *
41: * @author David Czarnecki
42: * @version $Id: PermissionChecker.java,v 1.2 2007/01/17 02:35:12 czarneckid Exp $
43: * @since blojsom 3.0
44: */
45: public class PermissionChecker {
46:
47: private Blog _blog;
48: private AuthorizationProvider _authorizationProvider;
49: private Map _permissionContext;
50:
51: /**
52: * Create a new permission checker for a given blog
53: *
54: * @param blogUser {@link Blog}
55: * @param authorizationProvider {@link AuthorizationProvider}
56: * @param permissionContext Context for permissions to be evaulated in (not-used)
57: */
58: public PermissionChecker(Blog blog,
59: AuthorizationProvider authorizationProvider,
60: Map permissionContext) {
61: _blog = blog;
62: _authorizationProvider = authorizationProvider;
63: _permissionContext = permissionContext;
64: }
65:
66: /**
67: * Check permission for a given username and permission
68: *
69: * @param username Username
70: * @param permission Permission to check
71: * @return <code>true</code> if <code>username</code> has given <code>permission</code>, <code>false</code> otherwise
72: */
73: public boolean checkPermission(String username, String permission) {
74: try {
75: _authorizationProvider.checkPermission(_blog,
76: _permissionContext, username, permission);
77: } catch (AuthorizationException e) {
78: return false;
79: }
80:
81: return true;
82: }
83: }
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