1   /**
2    * Distribution License:
3    * This is free software; you can redistribute it and/or modify it under
4    * the terms of the GNU Lesser General Public License, version 2.1 as published
5    * by the Free Software Foundation. This program is distributed in the hope
6    * that it will be useful, but WITHOUT ANY WARRANTY; without even the
7    * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
8    * See the GNU Lesser General Public License for more details.
9    *
10   * The License is available on the internet at:
11   *       http://www.gnu.org/copyleft/llgpl.html
12   * or by writing to:
13   *      Free Software Foundation, Inc.
14   *      59 Temple Place - Suite 330
15   *      Boston, MA 02111-1307, USA
16   *
17   * Copyright: 2005
18   *     The copyright to this program is held by it's authors.
19   *
20   * ID: $Id: ClassChoice.java 2050 2010-12-09 15:31:45Z dmsmith $
21   */
22  package org.crosswire.common.config;
23  
24  import org.crosswire.common.util.ClassUtil;
25  import org.crosswire.common.util.Logger;
26  
27  /**
28   * A class to convert between strings and objects of a type.
29   * 
30   * @see gnu.lgpl.License for license details.<br>
31   *      The copyright to this program is held by it's authors.
32   * @author Joe Walker [joe at eireneh dot com]
33   */
34  public class ClassChoice extends AbstractReflectedChoice {
35      /*
36       * (non-Javadoc)
37       * 
38       * @see org.crosswire.common.config.Choice#getConvertionClass()
39       */
40      public Class<?> getConversionClass() {
41          return Class.class;
42      }
43  
44      /*
45       * (non-Javadoc)
46       * 
47       * @see
48       * org.crosswire.common.config.AbstractReflectedChoice#convertToString(java
49       * .lang.Object)
50       */
51      @Override
52      public String convertToString(Object orig) {
53          if (orig == null) {
54              return null;
55          }
56  
57          return ((Class<?>) orig).getName();
58      }
59  
60      /*
61       * (non-Javadoc)
62       * 
63       * @see
64       * org.crosswire.common.config.AbstractReflectedChoice#convertToObject(java
65       * .lang.String)
66       */
67      @Override
68      public Object convertToObject(String orig) {
69          try {
70              return ClassUtil.forName(orig);
71          } catch (ClassNotFoundException ex) {
72              log.warn("Class not found: " + orig, ex);
73              return null;
74          }
75      }
76  
77      /**
78       * The log stream
79       */
80      private static final Logger log = Logger.getLogger(ClassChoice.class);
81  }
82