[s2] generator & iterator tags

[Kevin Wade <kw...@mindspring.com>]

Greetings all.  I am having difficulty crafting an struts 2 iterator  
using the generator tag.  I want to iterate over a set of string  
values and then test against the current one in the loop.  Something  
like this:

	<s:generator val="%{'wizards,dwarves,elves'}" separator=","  
id="myAttr">
		<s:iterator>
			<s:set name="groupname" value="#attr.myAttr.next" ></s:set>
  			< want to test groupname here, etc... >
		</s:iterator>
	</s:generator>

This doesn't work since the use of #attr.myAttr.next actually  
iterates the iterator (!) which means the iteration loop skips over  
one of the values.
I guess what I'm looking for is the correct ognl expression to get  
the current value of the iterator created by the generator.  Any ideas?

Kevin

Re: [s2] generator & iterator tags

[Kevin Wade <kw...@mindspring.com>]

Thanks for the reply.

I did indeed try to create an <s:iterator../> over an immediate list  
of those strings, but I could never get it to work.  I can get it to  
work over numbers (i.e. <s:iterator status="stat" value="{1,2,3,4,5}"  
 >), but not strings.  Probably user error.  I'd love to see a  
solution to that.

But your suggestion to use the id parameter w/in the generated  
iterator does indeed work.  I was attempting to use "id" w/in the  
generator tag which does not.  So, in the end, this works for me:

	<s:generator val="%{'wizards,dwarves,elves'}" separator=",">
		<s:iterator id="groupname">
  			groupname is: <s:property value="#groupname"/><br/>
		</s:iterator>
	</s:generator>

Thanks for your help.
Kevin

On Sep 21, 2007, at 11:58 AM, Dave Newton wrote:

> --- Kevin Wade <kw...@mindspring.com> wrote:
>> <s:generator val="%{'wizards,dwarves,elves'}"
>>              separator=","
>>              id="myAttr">
>>   <s:iterator>
>>     <s:set name="groupname"
> value="#attr.myAttr.next"/>
>>     < want to test groupname here, etc... >
>>    </s:iterator>
>> </s:generator>
>
> I'm not sure why you're using <s:generator.../> at all
> since you could <s:iterator.../> over an immediate
> list.
>
> <s:property/> will return the current iteration
> object. You should be able to use <s:iterator id="..."
> .../> to create a named object for the current
> iteration for use in comparisons, just like a
> non-generated iterator, but that's just theory at this
> point.
>
> d.
>
>
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Re: [s2] generator & iterator tags

[Dave Newton <ne...@yahoo.com>]

--- Kevin Wade <kw...@mindspring.com> wrote:
> <s:generator val="%{'wizards,dwarves,elves'}"
>              separator=","  
>              id="myAttr">
>   <s:iterator>
>     <s:set name="groupname"
value="#attr.myAttr.next"/>
>     < want to test groupname here, etc... >
>    </s:iterator>
> </s:generator>

I'm not sure why you're using <s:generator.../> at all
since you could <s:iterator.../> over an immediate
list.

<s:property/> will return the current iteration
object. You should be able to use <s:iterator id="..."
.../> to create a named object for the current
iteration for use in comparisons, just like a
non-generated iterator, but that's just theory at this
point.

d.


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