CustomPropertyEditorManager


1   /*
2    * EJTools, the Enterprise Java Tools
3    *
4    * Distributable under LGPL license.
5    * See terms of license at www.gnu.org.
6    */
7   package org.ejtools.beans;
8   
9   import java.beans.PropertyEditor  ;
10  import java.beans.PropertyEditorManager  ;
11  import java.util.Arrays  ;
12  import java.util.Vector  ;
13  
14  /**
15   * Decorator class to enhance the functionnality of the {@link PropertyEditorManager}.
16   * If a PropertyEditor is not found, a PropertyEditor matching one of the implemented interfaces
17   * is searched.
18   *
19   * @author    Laurent Etiemble
20   * @version   $Revision: 1.8 $
21   */
22  public abstract class CustomPropertyEditorManager extends PropertyEditorManager  
23  {
24     /** Description of the Field */
25     public final static String   EDITORS_PACKAGE = "org.ejtools.adwt.editor";
26  
27  
28     /**
29      * Add super interfaces search when finding a PropertyEditor
30      *
31      * @param clazz  The class of the property
32      * @return       The PropertyEditor found, null otherwise
33      */
34     public static synchronized PropertyEditor   findEditor(Class   clazz)
35     {
36        PropertyEditor   result = PropertyEditorManager.findEditor(clazz);
37  
38        // If the PropertyEditor is not found in mapping, it is the first time it is required
39        // so fetch it by the PropertyEditorManager
40        if (result == null)
41        {
42           // Search among the interfaces if there is one that has a PropertyEditor
43           Class  [] interfaces = clazz.getInterfaces();
44           for (int i = 0; i < interfaces.length; i++)
45           {
46              Class   current = interfaces[i];
47              result = CustomPropertyEditorManager.findEditor(current);
48              if (result != null)
49              {
50                 PropertyEditorManager.registerEditor(clazz, result.getClass());
51                 break;
52              }
53           }
54        }
55  
56        return result;
57     }
58  
59     /** Add a new package for the search */
60     static
61     {
62        String  [] paths = PropertyEditorManager.getEditorSearchPath();
63        Vector   newPaths = new Vector  ();
64        newPaths.addAll(Arrays.asList(paths));
65        if (!newPaths.contains(EDITORS_PACKAGE))
66        {
67           newPaths.add(EDITORS_PACKAGE);
68        }
69        PropertyEditorManager.setEditorSearchPath((String  []) newPaths.toArray(new String  [0]));
70     }
71  }
72
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