RE: Maps and Nested Properties problems

[Mathias, Merlyn]

Hi David and Rand,

Thank you very much for your help. I fixed my problem by referring to the
property name by address[index]{street} instead of address[index].street. It
worked. 

Thanks Again,
Merlyn.

-----Original Message-----
From: WILLIAMS,RAND (HP-USA,ex1) [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, February 25, 2003 1:40 PM
To: 'Struts Users Mailing List'
Subject: RE: Maps and Nested Properties problems

Hello Merlyn,

I am having trouble with modifying the Map.Entry.value, but this might help
you:

>From the docs
http://jakarta.apache.org/struts/userGuide/struts-logic.html#iterate

[ Normally, each object exposed by the iterate tag is an element of the
underlying collection you are iterating over. However, if you iterate over a
Map, the exposed object is of type Map.Entry that has two properties:

key - The key under which this item is stored in the underlying Map. 
value - The value that corresponds to this key. 
So, if you wish to iterate over the values of a Hashtable, you would
implement code like the following:

<logic:iterate id="element" name="myhashtable">
Next element is <bean:write name="element" property="value"/>
</logic:iterate> ]

I have used this: 

[hmtest.jsp] 
(note that type="..Entry" is reslly implicit - I did it for the sake of the
<%=..%> chunk)

<logic:notEmpty name="_engineerHM" property="products" >
 <logic:iterate name="_engineerHM" property="products" id="product"
type="java.util.Map.Entry" >
  <html:text name="product" property="key" /> 
  <html:text name="product" property="value" />
  <html:multibox name="_engineerHM" property="products_selected" 
                 value='<%=(String)roduct.getKey()%>' /> <br>
 </logic:iterate>
</logic:notEmpty>

[struts-config.xml]
        <form-bean
                name="_engineerHM" 
                type="org.apache.struts.action.DynaActionForm">
                <!-- want to test iteration on a HashMap -->
                <form-property 
                        name="products" 
                        type="java.util.HashMap" />
                <form-property 
                        name="products_selected" 
                        type="java.lang.String[]" />
        </form-bean>

[DynaActionFormHashMapTest.java]
(you will need to make a new hash map if one doesn't exist,
 this would be in the ActionForm reset() if I wasn't using DynaActionForm)
            if ( pHM == null ) {
                  log.info(" creating new HashMap for products");
                  pHM = new HashMap();
                }

-----Original Message-----
From: Mathias, Merlyn [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 25, 2003 12:57 PM
To: '[EMAIL PROTECTED]'
Subject: Maps and Nested Properties problems


Hi,
 
I would like to know how to use a Map with nested properties.  I have an
ArrayList of Maps in my ActionForm. I want to do something like this in my
JSP page.
 
<logic:iterate id="address" name="addressList" indexId="index">
 
Street: <html:text property="address[index].street" />
City : <html:text property=" address[index].city" />

 
And so on .......................
 
</logic:iterate> 
 
public class MyActionForm extends ActionForm
{
            private ArrayList addressList;
 
public MyActionForm()
{
            addressList = new ArrayList;
            addressList.add(new HashMap());
}
 
public Object getAddress(int index)
  {
    return addressList.get(index);
  }
 
public void setAddress(int index, Object value)
  {
    addressList.set(index,value);
  }
 
            
}
 
I don't get any errors but the input values are not getting saved. The
ActionForm is in session scope.  
 
I know this works if I have an ArrayList of 'Address' beans with getters and
setters.  Is there any way to do this with Map?
 
Thanks a lot,
Merlyn.

---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]