problem while seting properties of beans in collections in formulat

[Marek Lapin]

Hello

I encountered recently problem I am not able to solve.
I have an JSP page, using struts to build an form. In the form I hawe some text boxes in which i am writing som properties of some beans that i store in collections. When i change the fields in the form (i put there some values) and submit the form and redisplay the same page the values are unchanged. If I change some property of the bean (connected to the form) that is not collection than it is working as it should, but the properties that are in collections do not change

example

  
class FormBean
{
  private HashSet myFields = new HasSet();
  private String name = "";
 
  public HashSet getMyFields()
  {
     return myFields;
  }
 
  public void setMyFields(HashSet newFields)
  {
    myFields = newFields;
  }
 
  public String getName()
  {
     return name;
  }
 
  public void setName(String newName)
  {
     name = newName;
  }
  
}
 
class Field
{
  int number;
  public int getNumber()
  {
    return number;
  }
 
  public void setNumber(int newNumber)
  {
     number = newNumber;
  }
}

I put some instances of Field into myField

then i write the numbers into the html:text boxes in the jsp page. I change someof them, redisplay the page (on chceck the values in the ActionClass for this form) and the values are the same.
If I change the name field in the jsp, the value changes. But not the values of the beans stored in enumeration

form example

<html:form action="someAction">
Name : <html:text name="formBean" property="name"/>
Numbers:
<logic:iterate id=num name="formBean" property="myFields">
  Number: <html:text name="num" property="number"/>
</logic:iterate>
<html:submit value="pls change the values!"/>
</html:form>
 

after changing all the fields and forwarding to the same page, the only values that changes is the the name property of the formBean. The numbers (corectly displaying the value) property are the same... unchanged.

Am I doing something wrong or have I missed something in the struts ?

Thanks for answer

[Bear Bibeault]

Moving to the Web Frameworks forum.

[Marek Lapin]

I solved my problem by switching to "nested" struts extensions.

All though I had to convert ale my collections to indexed (I used Set, now I am using Array)

Is there a mean to use with nested struts extension non-indexed collections ?
I have not found iny information about the use of indexed or non-indexed collections anywhere when studying nested extensions, so I am wondering whether i missed something or it is just not mensioned anywhere.

[Sheldon Fernandes]

Hi,

You can use a "Set" only if you need to display values in the view. If an update of these values, back to the form, is required, there seems to be no option but to use arrays, Lists or Maps. I guess the "index" is the only way to identify which data in the collection has been updated.

Sheldon