Source Code Cross Referenced for SessionAttributes.java in  » Web-Framework » rife-1.6.1 » com » uwyn » rife » authentication » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » rife 1.6.1 » com.uwyn.rife.authentication 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright 2001-2007 Geert Bevin <gbevin[remove] at uwyn dot com>
03:         * Distributed under the terms of either:
04:         * - the common development and distribution license (CDDL), v1.0; or
05:         * - the GNU Lesser General Public License, v2.1 or later
06:         * $Id: SessionAttributes.java 3643 2007-01-12 15:29:45Z gbevin $
07:         */
08:        package com.uwyn.rife.authentication;
09:
10:        /**
11:         * This interface defines the methods that classes with
12:         * {@code SessionAttributes} functionalities have to implement.
13:         * <p>
14:         * A {@code SessionAttributes} class defines the context in which a session
15:         * is being validated. The presence and the value of certain attributes can
16:         * influence whether the access to a secured resource is authorized or
17:         * prohibited for a particular user.
18:         * <p>
19:         * For example, regular users have access to everything besides ithe
20:         * administration interface. Resources that are restricted to administrators can
21:         * for example have a {@code role} attribute that is set to
22:         * {@code admin}. A {@code SessionValidator} instance can detect the
23:         * presence of this attribute and act accordingly to verify if the user has the
24:         * authorities of the required role (in this case, administrator rights).
25:         *
26:         * @author Geert Bevin (gbevin[remove] at uwyn dot com)
27:         * @version $Revision: 3643 $
28:         * @see com.uwyn.rife.authentication.SessionValidator
29:         * @since 1.0
30:         */
31:        public interface SessionAttributes {
32:            /**
33:             * Checks if a certain attribute is present.
34:             *
35:             * @param key  The key that identifies the attribute.
36:             *
37:             * @return {@code true} if the attribute was present; or
38:             * <p>
39:             * {@code false} otherwise.
40:             *
41:             * @see #getAttribute(String)
42:             *
43:             * @since 1.0
44:             */
45:            public boolean hasAttribute(String key);
46:
47:            /**
48:             * Retrieves the value of a particular attribute.
49:             *
50:             * @param key  The key that identifies the attribute.
51:             *
52:             * @return A {@code String} instance with the value of the requested
53:             * attribute; or
54:             * <p>
55:             * {@code null} if the attribute couldn't be found.
56:             *
57:             * @see #hasAttribute(String)
58:             *
59:             * @since 1.0
60:             */
61:            public String getAttribute(String key);
62:        }
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