package com.oreilly.jent.struts.library.ui;

/**
 * In general, you may use the code in this book in your programs and 
 * documentation. You do not need to contact us for permission unless 
 * you're reproducing a significant portion of the code. For example, 
 * writing a program that uses several chunks of code from this book does 
 * not require permission. Selling or distributing a CD-ROM of examples 
 * from O'Reilly books does require permission. Answering a question by 
 * citing this book and quoting example code does not require permission. 
 * Incorporating a significant amount of example code from this book into 
 * your product's documentation does require permission.
 * 
 * We appreciate, but do not require, attribution. An attribution usually 
 * includes the title, author, publisher, and ISBN. For example: 
 * 
 *   "Java Enterprise in a Nutshell, Third Edition, 
 *    by Jim Farley and William Crawford 
 *    with Prakash Malani, John G. Norman, and Justin Gehtland. 
 *    Copyright 2006 O'Reilly Media, Inc., 0-596-10142-2."
 *  
 *  If you feel your use of code examples falls outside fair use or the 
 *  permission given above, feel free to contact us at 
 *  permissions@oreilly.com.
 */

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.DynaProperty;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.validator.DynaValidatorForm;

/**
 * @author jgn
 * @version $Id$
 */
public class SmartDynaValidatorForm extends DynaValidatorForm {

  private boolean calledOnce = false;
  
  public SmartDynaValidatorForm() {
    super();
  }

  public void reset(ActionMapping mapping, HttpServletRequest request) {
    
    if ( ! calledOnce) {
      calledOnce = true;
      return;
    }
    
    // Turn off all checkboxes (Booleans) when non-existent in form
    DynaProperty[] dps = getDynaClass().getDynaProperties();
    for (int i = 0; i < dps.length; i++) {
      DynaProperty dp = dps[i];
      String name = dp.getName();
      if (get(name) instanceof Boolean) {
        Boolean value = (Boolean) get(name);
        if (request.getParameter(name) == null) {
          set(name, Boolean.FALSE);
        }
      }
    }
    
  }
  
}