import java.awt.event.*;
import java.beans.*;

/**
 * PhotonBeanInfo provides bean information for the Photon bean.
 *
 * @author Thornton Rose
 */
public class PhotonBeanInfo extends SimpleBeanInfo {
   private PropertyDescriptor[] propertyDescriptors;
   private EventSetDescriptor[] eventSetDescriptors;

   /**
    * Construct the bean info. object.
    */
   public PhotonBeanInfo() {
      // Create property descriptors.
      
      try {
         propertyDescriptors = new PropertyDescriptor[] {
            createPropertyDescriptor("size", "Size"),
            createPropertyDescriptor("color", "Color")
         };
      } catch(Exception ex) {
         System.out.println("PhotonBeanInfo(): " + ex);
         propertyDescriptors = null;
      }

      // Create event descriptors.

      try {
         eventSetDescriptors = new EventSetDescriptor[] {
            createEventSetDescriptor("action", "ActionEvent",
               ActionListener.class, "actionPerformed")
         };
      } catch(Exception ex) {
         System.out.println("PhotonBeanInfo(): " + ex);
         eventSetDescriptors = null;
      }
   }

   /**
    * Return the property descriptors for the bean.
    */
   public PropertyDescriptor[] getPropertyDescriptors() {
      return propertyDescriptors;
   }

   /**
    * Return the event set descriptors for the bean.
    */
   public EventSetDescriptor[] getEventSetDescriptors() {
      return eventSetDescriptors;
   }

   private PropertyDescriptor createPropertyDescriptor(
         String name, String displayName) throws IntrospectionException {
      PropertyDescriptor pd = new PropertyDescriptor(name, Photon.class);

      if (displayName != null) {
         pd.setDisplayName(displayName);
      }

      return pd;
   }

   private EventSetDescriptor createEventSetDescriptor(String name,
         String displayName, Class listenerClass, String listenerMethod)
         throws IntrospectionException {
      EventSetDescriptor esd = new EventSetDescriptor(Photon.class, name,
         listenerClass, listenerMethod);
         
      if (displayName != null) {
         esd.setDisplayName(displayName);
      }

      return esd;
   }
}