transferbeaninfo.java

来自「webwork source」· Java 代码 · 共 74 行

/*
 * WebWork, Web Application Framework
 *
 * Distributable under Apache license.
 * See terms of license at opensource.org
 */
package webwork.examples.bank;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.beans.SimpleBeanInfo;
import java.util.ArrayList;

/**
 * This code is an adaptation of the Struts example from the JavaWorld article by Thor Kristmundsson.
 * http://www.javaworld.com/javaworld/jw-12-2000/jw-1201-struts_p.html
 */
public class TransferBeanInfo
   extends SimpleBeanInfo
{
   // Public  -------------------------------------------------------
   
   public PropertyDescriptor[] getPropertyDescriptors()
   {
      // Create a list of property descriptors
      // The main reason is to provide input validation through PropertyEditors
      // This will give transparent validation to the Actions
      // The validation requirements can then be changed without having
      // to change the Actions at all, which is a big win, especially if the
      // same Actions are to be reused in a similar project but with different
      // input validation requirements, which is common
      try
      {
         ArrayList list = new ArrayList();
         
         PropertyDescriptor descriptor;
      
         descriptor = new PropertyDescriptor("receiver", Transfer.class);
         descriptor.setPropertyEditorClass(NameEditor.class);
         list.add(descriptor);
      
         descriptor = new PropertyDescriptor("account", Transfer.class);
         descriptor.setPropertyEditorClass(AccountEditor.class);
         list.add(descriptor);
      
         descriptor = new PropertyDescriptor("amount", Transfer.class);
         descriptor.setPropertyEditorClass(AmountEditor.class);
         list.add(descriptor);

         descriptor = new PropertyDescriptor("date", Transfer.class);
         list.add(descriptor);
      
         return (PropertyDescriptor[])list.toArray(new PropertyDescriptor[list.size()]);
      } catch (Exception e)
      {
         e.printStackTrace();
         return super.getPropertyDescriptors();
      }
   }
   
   public BeanInfo[] getAdditionalBeanInfo()
   {
      try
      {
         return new BeanInfo[] { Introspector.getBeanInfo(Transfer.class.getSuperclass()) };
      } catch (Exception e)
      {
         e.printStackTrace();
         return super.getAdditionalBeanInfo();
      }
   }
   
}