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1   package org.codehaus.plexus.component.configurator.converters.composite;
2   
3   /*
4    * The MIT License
5    *
6    * Copyright (c) 2004, The Codehaus
7    *
8    * Permission is hereby granted, free of charge, to any person obtaining a copy of
9    * this software and associated documentation files (the "Software"), to deal in
10   * the Software without restriction, including without limitation the rights to
11   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
12   * of the Software, and to permit persons to whom the Software is furnished to do
13   * so, subject to the following conditions:
14   *
15   * The above copyright notice and this permission notice shall be included in all
16   * copies or substantial portions of the Software.
17   *
18   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24   * SOFTWARE.
25   */
26  
27  import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
28  import org.codehaus.plexus.component.configurator.ConfigurationListener;
29  import org.codehaus.plexus.component.configurator.converters.AbstractConfigurationConverter;
30  import org.codehaus.plexus.component.configurator.converters.lookup.ConverterLookup;
31  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
32  import org.codehaus.plexus.configuration.PlexusConfiguration;
33  
34  import java.util.Map;
35  import java.util.Properties;
36  import java.util.TreeMap;
37  
38  /**
39   * Converter for <code>java.util.Properties</code>.
40   *
41   * @author <a href="mailto:michal@codehaus.org">Michal Maczka</a>
42   * @version $Id$
43   */
44  public class MapConverter
45      extends AbstractConfigurationConverter
46  {
47      public boolean canConvert( Class type )
48      {
49          return Map.class.isAssignableFrom( type ) && !Properties.class.isAssignableFrom( type );
50      }
51  
52      public Object fromConfiguration( ConverterLookup converterLookup, PlexusConfiguration configuration, Class type,
53                                       Class baseType, ClassLoader classLoader, ExpressionEvaluator expressionEvaluator,
54                                       ConfigurationListener listener )
55          throws ComponentConfigurationException
56      {
57          Object retValue;
58  
59          String expression = configuration.getValue( null );
60  
61          if ( expression == null )
62          {
63              expression = configuration.getAttribute( "default-value", null );
64          }
65  
66          if ( expression == null )
67          {
68              Map map = new TreeMap();
69  
70              PlexusConfiguration[] children = configuration.getChildren();
71  
72              for (PlexusConfiguration child : children) {
73                  String name = child.getName();
74  
75                  map.put(name, fromExpression(child, expressionEvaluator));
76              }
77              retValue = map;
78          }
79          else
80          {
81              retValue = fromExpression( configuration, expressionEvaluator );
82          }
83          return retValue;
84      }
85  
86  }