[S2] Multiple problem

[Wei Xu <ta...@hotmail.com>]

First, you can look through next jsp codes:

<s:iterator status="stat" value="destObjects">
<tr>
   <s:iterator value="visibleColumns">
     <td>
       <s:property value="destObjects[%{#stat.index}].%{fieldDefName}" />
     </td>
   </s:iterator>
</tr>
</s:iterator>

Variable "destObejcts" is a <LIST> type which contains a serial of objects 
named "destObject".

Variable "visibleColumns" is also a LIST of objects named "visibleColumn", 
and "fieldDefName" is a property of "visibleColumn".

And thus value of expression "visibleColumn.fieldDefName" will be a property 
name of object "destObject".

Above relationship between two objects sounds a bit boring. As a trouble, I 
failed to get the correct values of these dynamic fields of "destObejct", 
and I had tried in many ways, and next Struts2 expressions ALL could not 
work:

<s:property value="destObjects[%{#stat.index}].%{fieldDefName}" />
<s:property value="%{destObjects[#stat.index].%{fieldDefName}}" />
<s:property value="%{fieldDefName}" />


Is there anyone could help me? Thanks.

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Re: [S2] Multiple problem

[Laurie Harper <la...@holoweb.net>]

Please keep related messages within the same thread and try to avoid 
re-posting a question without the context of any prior discussion. See 
below for another suggestion:

Wei Xu wrote:
> First, you can look through next jsp codes:
> 
> <s:iterator status="stat" value="destObjects">
> <tr>
>   <s:iterator value="visibleColumns">
>     <td>
>       <s:property value="destObjects[%{#stat.index}].%{fieldDefName}" />
>     </td>
>   </s:iterator>
> </tr>
> </s:iterator>

Why do the indexing into destObjects manually when s:iterator is already 
doing it for you? How about something like this:

   <s:iterator id="do" value="destObjects">
   <tr>
     <s:iterator value="visibleColumns">
       <td>
         <s:property value="%{#do[fieldDefName]}"/>
       </td>
     </s:iterator>
   </tr>
   </s:iterator>

or, being a little more explicit if you prefer:

   <s:iterator id="do" value="destObjects">
   <tr>
     <s:iterator id="vc" value="visibleColumns">
       <td>
         <s:property value="%{#do[#vc.fieldDefName]}"/>
       </td>
     </s:iterator>
   </tr>
   </s:iterator>

> ALL could not work:
> 
> <s:property value="destObjects[%{#stat.index}].%{fieldDefName}" />
> <s:property value="%{destObjects[#stat.index].%{fieldDefName}}" />
> <s:property value="%{fieldDefName}" />

The first two don't look like valid OGNL expressions to me; I don't know 
OGNL very well, but I wouldn't expect it to support nested expressions 
(%{...%{...}...}).

L.


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