1   /**
2    * Distribution License:
3    * JSword 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 or later
5    * as published by the Free Software Foundation. This program is distributed
6    * in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
7    * the 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/lgpl.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   * © CrossWire Bible Society, 2005 - 2016
18   *
19   */
20  package org.crosswire.jsword.util;
21  
22  import java.util.Map;
23  
24  import org.crosswire.common.util.PluginUtil;
25  import org.crosswire.common.xml.Converter;
26  import org.crosswire.jsword.JSOtherMsg;
27  
28  /**
29   * A factory for Converters.
30   * 
31   * @see gnu.lgpl.License The GNU Lesser General Public License for details.
32   * @author Joe Walker
33   * @see org.crosswire.common.xml.Converter
34   */
35  public final class ConverterFactory {
36      /**
37       * Prevent instantiation
38       */
39      private ConverterFactory() {
40      }
41  
42      /**
43       * Generate a converter for the current converter name
44       * @return the plugin converter
45       */
46      public static Converter getConverter() {
47          try {
48              Class<Converter> clazz = PluginUtil.getImplementorsMap(Converter.class).get(name);
49              assert clazz != null : JSOtherMsg.lookupText("No converter called: {0}", name);
50              return clazz.newInstance();
51          } catch (InstantiationException e) {
52              assert false : e;
53          } catch (IllegalAccessException e) {
54              assert false : e;
55          }
56          return null;
57      }
58  
59      /**
60       * Get a map of the known converters, by looking up the answers in Project
61       * 
62       * @return the map of known converters
63       */
64      public static Map<String, Class<Converter>> getKnownConverters() {
65          return PluginUtil.getImplementorsMap(Converter.class);
66      }
67  
68      /**
69       * For config to set the currently preferred converter implementation
70       * 
71       * @param name 
72       */
73      public static void setCurrentConverterName(String name) {
74          ConverterFactory.name = name;
75      }
76  
77      /**
78       * For config to read the currently preferred converter implementation
79       * 
80       * @return the current plugin converter
81       */
82      public static String getCurrentConverterName() {
83          return name;
84      }
85  
86      /**
87       * Current default converter implementation
88       */
89      private static String name = "Configurable";
90  }
91