1 /*
2 jGuard is a security framework based on top of jaas (java authentication and authorization security).
3 it is written for web applications, to resolve simply, access control problems.
4 version $Name$
5 http://sourceforge.net/projects/jguard/
6
7 Copyright (C) 2004 Charles GAY
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22
23
24 jGuard project home page:
25 http://sourceforge.net/projects/jguard/
26
27 */
28
29 package net.sf.jguard.core.authentication;
30
31 import java.util.HashMap;
32 import java.util.Iterator;
33 import java.util.Map;
34
35 /**
36 * contains a Map of identified Keys to reach some Objects bound in some specific contexts.
37 * for example, it is used to abstarct an HttpServletRequest and HttpServletResponse to not
38 * wire all the API to the servlet API, but to the AccessContext, to support
39 * further underlying technologies.
40 * this class should only be instantiated by technology anchors like AccessFilter and
41 * AccessListener.
42 * @author <a href="mailto:diabolo512@users.sourceforge.net">Charles Gay</a>
43 */
44 public class AccessContext implements Cloneable{
45
46 private Map<String,Object> parameters;
47
48 /** Creates a new instance of Context */
49 public AccessContext() {
50 parameters = new HashMap<String,Object>();
51 }
52
53 public Object getAttribute(String key) {
54 return parameters.get(key);
55 }
56
57 public void setAttribute(String key, Object value) {
58 parameters.put(key,value);
59 }
60
61 /**
62 * return a cloned context containing a shallow copy of the internal Map:
63 * keys and values themselves are not cloned.
64 */
65 @Override
66 public Object clone(){
67 AccessContext context = new AccessContext();
68 Iterator it = parameters.keySet().iterator();
69 while(it.hasNext()){
70 String key = (String)it.next();
71 Object value = parameters.get(key);
72 context.setAttribute(key, value);
73 }
74 return context;
75 }
76
77
78 }