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Java > Open Source Codes > net > sf > jguard > core > authorization > policy > ProtectionDomainUtils


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 package net.sf.jguard.core.authorization.policy;
29
30 import java.lang.reflect.Array JavaDoc;
31 import java.net.URL JavaDoc;
32 import java.security.CodeSource JavaDoc;
33 import java.security.Principal JavaDoc;
34 import java.security.ProtectionDomain JavaDoc;
35 import java.security.cert.Certificate JavaDoc;
36 import java.util.Collection JavaDoc;
37
38 /**
39  *
40  * Utility class related to {@link ProtectionDomain}.
41  * @author <a HREF="mailto:diabolo512@users.sourceforge.net">Charles Gay</a>
42  *
43  */
44 public class ProtectionDomainUtils {
45
46     /**
47        * return a {@link ProtectionDomain} mapping permissions from principal but not {@link CodeSource}.
48        * @param principal
49        * @return an empty ProtectionDomain with the principal
50        */
51       public static ProtectionDomain JavaDoc getEmptyProtectionDomain(Principal JavaDoc principal) {
52           URL JavaDoc url = null;
53           Certificate JavaDoc[] certs = null;
54           CodeSource JavaDoc cs = new CodeSource JavaDoc(url,certs);
55           Principal JavaDoc[] array = (Principal JavaDoc[])Array.newInstance(principal.getClass(),1);
56           Array.set(array,0,principal);
57           ProtectionDomain JavaDoc pd = new ProtectionDomain JavaDoc(cs,null,Thread.currentThread().getContextClassLoader(),array);
58           return pd;
59       }
60
61     /**
62        * return a {@link ProtectionDomain} mapping permissions from the collection of principals but not {@link CodeSource}.
63        * @param principals
64        * @return an empty ProtectionDomain with the principals
65        */
66       public static ProtectionDomain JavaDoc getEmptyProtectionDomain(Collection JavaDoc principals) {
67           Principal JavaDoc[] ppals = (Principal JavaDoc[])principals.toArray(new Principal JavaDoc[principals.size()]);
68           URL JavaDoc url = null;
69           Certificate JavaDoc[] certs = null;
70           CodeSource JavaDoc cs = new CodeSource JavaDoc(url,certs);
71           ProtectionDomain JavaDoc pd = new ProtectionDomain JavaDoc(cs,null,Thread.currentThread().getContextClassLoader(),ppals);
72           return pd;
73       }
74
75 }
76
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