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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.listener;
19  
20  /**
21   * Helper class for {@link ContextListener}s.
22   * 
23   * @author sanjin
24   */
25  public abstract class BaseListener implements ContextListener {
26  
27      private final String name;
28  
29      /**
30       * Use specified <code>name</code> as return value for
31       * {@link BaseListener#getName()} method.
32       * 
33       * @param name the name of the context listener.
34       * @throws NullPointerException if specified name is <code>null</code>.
35       * @throws IllegalArgumentException if specified name is an empty or blank
36       *         string.
37       */
38      protected BaseListener(final String name) {
39          super();
40  
41          if (null == name) {
42              throw new NullPointerException("Name cannot be null.");
43          }
44          if (name.trim().isEmpty()) {
45              throw new IllegalArgumentException(
46                      "Name cannot be an empty blank string.");
47          }
48  
49          this.name = name;
50      }
51  
52      @Override
53      public final String getName() {
54          return this.name;
55      }
56  }