JGPositivePermissionCollection


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.permissions;
29  
30  import java.security.Permission  ;
31  import java.util.Iterator  ;
32  import java.util.Set  ;
33  
34  /**
35   * JGPermissionCollection with an <strong>additive</strong> mechanism.
36   * @author <a HREF="mailto:vberetti@users.sourceforge.net">Vincent Beretti</a>
37   * @author <a HREF="mailto:diabolo512@users.sourceforge.net ">Charles Gay</a>
38   * @see net.sf.jguard.core.authorization.permissions.JGPermissionCollection
39   */
40  public final class JGPositivePermissionCollection extends JGPermissionCollection{
41  
42  
43      private static final long serialVersionUID = -8614536023543936476L;
44  
45  
46      public JGPositivePermissionCollection() {
47          super();
48      }
49  
50      public JGPositivePermissionCollection(Set   permissionsSet) {
51          super(permissionsSet);
52      }
53  
54      /** verify if this permission implies the other permission.
55       * @see java.security.PermissionCollection#implies(java.security.Permission)
56       */
57      public boolean implies(Permission   permission) {
58          Iterator   it = permissions.iterator();
59          Permission   p;
60  
61          while(it.hasNext()){
62              p = (Permission  ) it.next();
63              if (p.implies(permission)) {
64                  return true;
65              }
66          }
67          return false;
68      }
69  
70  }
71
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