Nested tags confusion

[David Miller]

Greetings.

I'm having extreme difficulty getting my application to work with nested
tags.

My form is very simple: it consists of a string and a DTO Object. The DTO
Object in turn contains a List that holds another DTO Object: Form -> Bean
-> List.
Currently I can display data with no trouble but updating data does not
work. I get a variety of very informative errors but and occasionally get no
errors at all. In either case, I am not able to retrieve any updated data in
my Action.

My guess is that I need something to help Struts auto-populate the form. I'm
very new to Struts though so all of this is still pretty mysterious.

Additionally I'm stuck with Struts 1.1x and am unable to update/change/add
any jars.

code:

*The Form*
public class UserInfoForm extends ActionForm
{
private String callType;
private UserInfoDTO userInfoDTO = new UserInfoDTO();

public UsocMaintenanceForm() {
 super();
}

public UserInfoDTO getUsocMaintenanceDTO() {
 return userInfoDTO;
}

public void setUserInfoDTO(UserInfoDTO userInfoDTO) {
 this.userInfoDTO = userInfoDTO;
}

public void setCallType(String callType) {
 this.callType = callType;
}

public String getCallType() {
 return callType;
}
}

*UserInfoDTO*
public class UserInfoDTO
{
 private String userName;
 private List gadgetList;

 public UserInfoDTO() {
 }

 public String getUserName() {
   return userName;
 }

 public void setUserName(List gadgetList) {
   this.gadgetList= gadgetList;
 }

 public List getGadgetList() {
   return gadgetList;
 }

 public void setGadgetList(String userName) {
   this.userName = userName;
 }

 public GadgetDTO getCreateGadgetDTO( int index )
 {
while( gadgetList.size() <= index )
{
 gadgetList.add( new GadgetDTO() );
}

return (GadgetDTO)gadgetList.get( index );
 }
}

*GadgetDTO
*public class GadgetDTO
{
private String description;
private String cost;

public String getDescription() {
  return description;
}

public void setDescription( String description ) {
  this.description = description;
}

public void setCost( String cost ) {
  this.cost = cost;
}

public String getCost() {
  return cost;
}
}
*Part of the JSP*
<html:form action="/gadgetAction.do">
...
<nested:nest property="userInfoDTO">
 <nested:iterate property="gadgetList" type="com.foo.dto.GadgetDTO"
id="createGadgetDTO">
   <tr>
     <td><nested:text name="createGadgetDTO" property="description"
indexed="true" /></td>
   </tr>
     <td><nested:text name="createGadgetDTO" property="cost" indexed="true"
/></td>
   <tr>
   </tr>
 </nested:iterate>
</nested:nest>
...
<%-- buttons --%>
...
</html:form>