how to use Struts validator to this action form-please help me

[hem hem <he...@yahoo.com>]

hi all,
i am new to struts validation.
i foung some nice tutorials which validates action forms using validator-rules.xml and validation.xml(which connects  validator-rules.xml and formbean name in stuts-config.xml).
 
but my form bean looks like this(i am using 2 more beans in my action form) which results in nested properties.
 
here is my UsersForm:
 
 
 
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.validator.ValidatorForm;
 
public class UsersForm extends ValidatorForm {
 
 private static final int MAX_NUMBER_OF_USERS = 5;
 private int numberOfUsers = 0;
 private static final String mandatoryFields = "madatory field"; // Mandatory error category
 private static final String dateFormat = "date error"; // user error category
 private ProductBean product = new ProductBean();
 private String purpose = "";
 private List users = new ArrayList(MAX_NUMBER_OF_USERS);
 public UsersForm() {
  super();
  
  for (int i = 0; i < MAX_NUMBER_OF_USERS; i++) {
   UsersBean ub = new UsersBean();
   users.add(ub);
  }
 }
 public void reset(ActionMapping mapping, HttpServletRequest request) {
 }
 public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
  ActionErrors errors = null;
  
  boolean mandatoryError = false;
  Iterator i = users.iterator();
  while (i.hasNext()) {
   UsersBean bean = (UsersBean)i.next();
   
   if (bean.getSurname() != null && !bean.getSurname().equals("")) {
    ++numberOfUsers;
    
    if (! mandatoryError){
     
     if ((bean.getDob() == null) || (bean.getDob().equals(""))) {
      errors = addError(errors, UsersForm.mandatoryFields);      
      
      mandatoryError = true;
     } else {
      
      
      SimpleDateFormat sdf = new SimpleDateFormat(DateHelper.dateFormatddmmyyyy);
      sdf.setLenient(false);
      try {
       Date dob = sdf.parse(bean.getDob());
      } catch (ParseException e) {
       errors = addError(errors, UsersForm.dateFormat);
      }
     }
    }
   }
   
   if (numberOfUsers == 0 && mandatoryError == false) {
    errors = addError(errors, UsersForm.mandatoryFields);
    
    mandatoryError = true;
   }
  }
  
  return errors;
 }
 
 private ActionErrors addError(ActionErrors errors, String messageKey) { 
  if (errors == null) {
   errors = new ActionErrors();
  }
  ActionMessage error = new ActionMessage(messageKey);
  errors.add(messageKey, error);
  return errors;
 }
 
 /**
  * @return
  */
 public String getPurpose() {
  return basis;
 }
 /**
  * @param string
  */
 public void setPurpose(String string) {
  purpose = string;
 }
 /**
  * @return
  */
 public ProductBean getProduct() {
  return product;
 }
 /**
  * @param bean
  */
 public void setProduct(ProductBean bean) {
  product = bean;
 }
 /**
  * @return
  */
 public List getUsers() {
  return users;
 }
 /**
  * @param list
  */
 public void setUsers(List list) {
  users = list;
 }
 public void setUsers(int index, Object value) {
  users.add(index, value);
 }
 
 public Object getUsers(int index) {
  return users.get(index);
 }
 /**
  * @return
  */
 public int getNumberOfUsers() {
  return numberOfUsers;
 }
}

 
and here is my ProductBean:
 
 

public class ProductBean {
 private String code;
 /**
  * 
  */
 public ProductBean() {
  super();
  
 }
 public ProductBean(String aCode) {
  this.code = aCode;
 }
 /**
  * @return
  */
 public String getCode() {
  return code;
 }
 /**
  * @param string
  */
 public void setCode(String string) {
  code = string;
 }
}

and here is my UsersBean:
 

public class UsersBean {
 private String title = null;
 private String forename = null;
 private String surname = null;
 private String dob = null;
 
 public UsersBean() {
  super();
 }
 /**
  * @return
  */
 public String getDob() {
  return dob;
 }
 
 /**
  * @return
  */
 public String getTitle() {
  return title;
 }
 /**
  * @param string
  */
 public void setDob(String string) {
  dob = string;
 }
 
 /**
  * @param string
  */
 public void setTitle(String string) {
  title = string;
 }
 /**
  * @return
  */
 public String getForename() {
  return forename;
 }
 
 /**
  * @return
  */
 public String getSurname() {
  return surname;
 }
 /**
  * @param string
  */
 public void setForename(String string) {
  forename = string;
 }
 
 /**
  * @param string
  */
 public void setSurname(String string) {
  surname = string;
 }

 
}

 
i want to validate all the fields 5users*4 =20 and purpose filed and code in productbean and save the errors?
 
can any one give me an out line idea to do validation using struts(using the files validator-rules.xml,validation.xml and struts-config.xml where we write form bean definitions
 
 
regards and many thanks advance

		
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