View Javadoc

1   /*
2    * $Id: PropertyChangeListenerTag.java,v 1.1 2007/01/05 17:09:51 oeuillot Exp $
3    */
4   package org.rcfaces.core.internal.taglib;
5   
6   import javax.faces.FacesException;
7   import javax.faces.component.UIComponent;
8   
9   import org.apache.commons.logging.Log;
10  import org.apache.commons.logging.LogFactory;
11  import org.rcfaces.core.component.capability.IPropertyChangeEventCapability;
12  import org.rcfaces.core.event.IPropertyChangeListener;
13  
14  /**
15   * 
16   * @author Olivier Oeuillot (latest modification by $Author: oeuillot $)
17   * @version $Revision: 1.1 $ $Date: 2007/01/05 17:09:51 $
18   */
19  public class PropertyChangeListenerTag extends AbstractListenerTag {
20      private static final String REVISION = "$Revision: 1.1 $";
21  
22      private static final long serialVersionUID = 5117953058731866439L;
23  
24      private static final Log LOG = LogFactory
25              .getLog(PropertyChangeListenerTag.class);
26  
27      protected void addListener(Object listener, UIComponent component) {
28          addPropertyChangeListener(listener, component);
29      }
30  
31      public static void addPropertyChangeListener(Object listener,
32              UIComponent component) {
33  
34          if ((listener instanceof IPropertyChangeListener) == false) {
35              throw new FacesException("Listener '" + listener
36                      + "' must implement IPropertyChangeListener.");
37          }
38  
39          IPropertyChangeListener propertyChangeListener = (IPropertyChangeListener) listener;
40  
41          if ((component instanceof IPropertyChangeEventCapability) == false) {
42              LOG.error("Component '" + component.getId()
43                      + "' does not implement IPropertyChangeEventCapability.");
44              return;
45          }
46  
47          ((IPropertyChangeEventCapability) component)
48                  .addPropertyChangeListener(propertyChangeListener);
49  
50          if (LOG.isDebugEnabled()) {
51              LOG.debug("Add propertyChangeListener '" + propertyChangeListener
52                      + "' to component '" + component.getId() + "'.");
53          }
54      }
55  
56      protected String getListenerName() {
57          return "propertyChange";
58      }
59  
60  }