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1 | /* | |
2 | Chrysalis Web Framework [http://chrysalis.sourceforge.net] | |
3 | Copyright (c) 2002, 2003, 2004, Paul Strack | |
4 | ||
5 | All rights reserved. | |
6 | ||
7 | Redistribution and use in source and binary forms, with or without | |
8 | modification, are permitted provided that the following conditions are met: | |
9 | ||
10 | 1. Redistributions of source code must retain the above copyright notice, this | |
11 | list of conditions and the following disclaimer. | |
12 | ||
13 | 2. Redistributions in binary form must reproduce the above copyright notice, | |
14 | this list of conditions and the following disclaimer in the documentation | |
15 | and/or other materials provided with the distribution. | |
16 | ||
17 | 3. Neither the name of the copyright holder nor the names of its contributors | |
18 | may be used to endorse or promote products derived from this software without | |
19 | specific prior written permission. | |
20 | ||
21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
22 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
23 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | |
25 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
26 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
27 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
28 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
29 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
31 | */ | |
32 | ||
33 | package org.chwf.plugin; | |
34 | ||
35 | import org.chwf.config.ConfigFactory; | |
36 | import org.chwf.registry.RegistryException; | |
37 | import org.chwf.registry.UserRegistry; | |
38 | ||
39 | /** | |
40 | * An abstract superclass for custom user information. This plugin class | |
41 | * can be used to define custom authentication mechanisms for the Chrysalis | |
42 | * framework. Unlike most plugins, the <code>User</code> plugin is a | |
43 | * per-user singleton rather than a global singleton. | |
44 | * | |
45 | * @author <a href="mailto:pfstrack@users.sourceforge.net">Paul Strack</a> | |
46 | */ | |
47 | 1 | public abstract class User { |
48 | ||
49 | /** Special role requiring only authentication. */ | |
50 | public static final String AUTHENTICATED = "AUTHENTICATED"; | |
51 | ||
52 | /** The default user plugin. */ | |
53 | private static final String DEFAULT_USER = | |
54 | "org.chwf.plugin.defaults.DefaultUser"; | |
55 | ||
56 | /** The user class specified in the configuration. */ | |
57 | 1 | private static final String USER_CLASS = |
58 | ConfigFactory.getConfig(User.class).get("user.class", DEFAULT_USER); | |
59 | ||
60 | /** Parameter that stores post-login redirects. */ | |
61 | public static final String REDIRECT_PARAMETER = "redirect"; | |
62 | ||
63 | /** | |
64 | * Returns the current <code>User</code> object. This object will contain | |
65 | * no information if no user is currently logged in. Any custom login | |
66 | * operation should populate the <code>User</code> object with appropriate | |
67 | * authentication data.<p> | |
68 | * | |
69 | * @throws RegistryException If the user class cannot be initialized. | |
70 | * @return The user. | |
71 | */ | |
72 | public static User getInstance() throws RegistryException { | |
73 | 14 | return (User) UserRegistry.getSingleton(USER_CLASS); |
74 | } | |
75 | ||
76 | /** No-op constructor. */ | |
77 | 14 | protected User() { |
78 | 14 | } |
79 | ||
80 | /** | |
81 | * Retrieve the user ID (if available) used to log in this user.<p> | |
82 | * | |
83 | * @return User id or <code>null</code> if not logged in. | |
84 | */ | |
85 | public abstract String getUserID(); | |
86 | ||
87 | /** | |
88 | * True if the user is in the specified role.<p> | |
89 | * | |
90 | * @param role The role. | |
91 | * @return True if the user is in the specified role. | |
92 | */ | |
93 | public abstract boolean isInRole(String role); | |
94 | ||
95 | /** | |
96 | * True if the user has logged in.<p> | |
97 | * | |
98 | * @return True if the user has logged in. | |
99 | */ | |
100 | public abstract boolean isAuthenticated(); | |
101 | ||
102 | /** | |
103 | * A string name for the authentication mechanism.<p> | |
104 | * | |
105 | * @return The authentication mechanism or <code>null</code> if not logged in. | |
106 | */ | |
107 | public abstract String getAuthType(); | |
108 | ||
109 | /** | |
110 | * Log the user out. This method should also invalidate the user's session. | |
111 | * This method may not completely log out the user, because some mechanisms | |
112 | * (e.g. Basic HTTP authentication) will immediately log the user back in | |
113 | * for the next request.<p> | |
114 | */ | |
115 | public abstract void logout(); | |
116 | ||
117 | /** | |
118 | * <p>Method that checks roles user roles. This method should throw | |
119 | * a {@link SecurityException} if the user's role is invalid.</p> | |
120 | * | |
121 | * @param roles The expected security roles. | |
122 | * @throws AuthenticationException With error message for security failure. | |
123 | */ | |
124 | public abstract void check(String[] roles) throws AuthenticationException; | |
125 | } |
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