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1   /* This file is part of COPAL (COntext Provisioning for All).
2    *
3    * COPAL is a part of SM4All (Smart hoMes for All) project.
4    *
5    * COPAL is free software: you can redistribute it and/or modify
6    * it under the terms of the GNU Lesser General Public License as published by
7    * the Free Software Foundation, either version 3 of the License, or
8    * (at your option) any later version.
9    *
10   * COPAL is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   * GNU Lesser General Public License for more details.
14   *
15   * You should have received a copy of the GNU Lesser General Public License
16   * along with COPAL. If not, see <http://www.gnu.org/licenses/>.
17   */
18  package at.ac.tuwien.infosys.sm4all.copal.api.security;
19  
20  import java.util.Map;
21  import at.ac.tuwien.infosys.sm4all.copal.api.event.ContextEvent;
22  import at.ac.tuwien.infosys.sm4all.copal.api.listener.ContextListener;
23  import static at.ac.tuwien.infosys.sm4all.copal.api.security.AuthorizationResult.Allow;
24  import static at.ac.tuwien.infosys.sm4all.copal.api.security.AuthorizationResult.Deny;
25  
26  /**
27   * Implementation of {@link AuthorizationMethod} that checks whether a
28   * {@link ContextListener} has expected class name.
29   * 
30   * @author sanjin
31   */
32  public class HasClassName implements AuthorizationMethod {
33  
34      private static final String CLASS_NAME_ATTRIBUTE = "name";
35  
36      @Override
37      public String getName() {
38          return "hasClass";
39      }
40  
41      @Override
42      public AuthorizationResult authorize(final ContextListener listener,
43              final ContextEvent event, final Map<String, String> attributes) {
44          AuthorizationResult result = Allow;
45  
46          if (attributes.containsKey(CLASS_NAME_ATTRIBUTE)) {
47              if (!listener.getClass().getSimpleName().equals(
48                      attributes.get(CLASS_NAME_ATTRIBUTE))) {
49                  result = Deny;
50              }
51          }
52  
53          return result;
54      }
55  }