In a merged iterator, know which iterator current item belongs

[Anton Pussep <an...@pussep.de>]

Hello,

I want to successively call several iterators. This works perfectly fine
with a merged iterator, but now I need to know to which iterator the
currently processed entry belongs to, since they have to be treated
differently.

See the small example below that illustrates my intention. Currently I
just check if the current entry is an odd number or not, but this does
not work if numbers.length>operators.length+1 or even
operators.length<numbers.length; do you have any suggestion how to solve
this?

<s:merge id="mergedIterator">
  <s:param value="numbers" />
  <s:param value="operators" />
</s:merge>
<s:iterator value="%{#mergedIterator}" status="iterStatus">
  <s:if test="#iterStatus.odd">
    NUMBER
  </s:if>
  <s:else>
    OPERATOR
  </s:else>
</s:iterator>

Thanks,
Anton

Re: In a merged iterator, know which iterator current item belongs

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

--- Anton Pussep <an...@pussep.de> wrote:
> In this case numbers is of type double[] and
> operators is of type String[]. Would be great if you

> could tell me how to check for the type.

OGNL.

<s:if test="#foo.class.name == 'java.lang.String'">

d.



 
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Re: In a merged iterator, know which iterator current item belongs

[Anton Pussep <an...@pussep.de>]

>> but now I need to know to which iterator the
>> currently processed entry belongs to, since they
>> have to be treated differently.
> 
> Are the items of the same type?
> 
> If so, I'm not sure what you can do.
> 

In this case numbers is of type double[] and operators is of type
String[]. Would be great if you could tell me how to check for the type.

Actually I thought of another solution. If not using tags but JSP I
would write:

for(int i=0; i<Math.max(numbers.length, operators.length); i++) {
  // check if index exists for numbers and print out "NUMBER"
  // check if index exists for operators and print out "OPERATOR"
}

And I think it is possible to write the same peace of code with tags.
But would you recommend me to go with tags or use JSP?

Best,
Anton

Re: In a merged iterator, know which iterator current item belongs

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

--- Anton Pussep <an...@pussep.de> wrote:
> but now I need to know to which iterator the
> currently processed entry belongs to, since they
> have to be treated differently.

Are the items of the same type?

If so, I'm not sure what you can do.

d.



 
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