AccessTree


1   /*************************************************************************
2    *                                                                       *
3    *  EJBCA: The OpenSource Certificate Authority                          *
4    *                                                                       *
5    *  This software is free software; you can redistribute it and/or       *
6    *  modify it under the terms of the GNU Lesser General Public           *
7    *  License as published by the Free Software Foundation; either         *
8    *  version 2.1 of the License, or any later version.                    *
9    *                                                                       *
10   *  See terms of license at gnu.org.                                     *
11   *                                                                       *
12   *************************************************************************/
13   
14  package org.ejbca.core.model.authorization;
15  
16  import java.io.Serializable  ;
17  import java.util.Collection  ;
18  import java.util.Iterator  ;
19  /**
20   * A class that builds and maintains an accesstree. It should be used to check if a
21   * client certificate has access rights to a resource or not. isAthorized metod is the one to use.
22   *
23   * @author  Philip Vendil
24   * @version $Id: AccessTree.java,v 1.1 2006/01/17 20:30:56 anatom Exp $
25   */
26  public class AccessTree implements Serializable   {
27      /** Creates a new instance of AccessTree */
28      public AccessTree() {}
29  
30      // Public methods
31      /** Builds an accesstree out of the given admingroup data. */
32      public void buildTree(Collection   admingroups) {
33          rootnode = new AccessTreeNode("/");
34                    
35          Iterator   iter = admingroups.iterator();
36          // Add all admingroups accessrules.
37          while(iter.hasNext()){
38            AdminGroup admingroup = (AdminGroup) iter.next(); 
39            Iterator   iter2 = admingroup.getAccessRules().iterator();
40            while(iter2.hasNext()){
41              AccessRule accessrule = (AccessRule) iter2.next();  
42              rootnode.addAccessRule(accessrule.getAccessRule(),accessrule,admingroup); // Without heading '/' 
43            }
44          }
45      }
46  
47      /** A method to check if someone is athorized to view the given resource */
48      public boolean isAuthorized(AdminInformation admininformation, String   resource){
49            String   checkresource = resource;
50          // Must begin with '/'.
51          if((checkresource.toCharArray())[0] != '/')
52            checkresource = "/" + checkresource;
53  
54          // Check if user is athorized in the tree.
55          boolean retval = rootnode.isAuthorized(admininformation, checkresource);
56          return retval;
57      }
58  
59  
60  
61      // Private fields
62      private AccessTreeNode rootnode = null;
63  
64  }
65
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