Re: JSTL Question

[Jack Lauman]

David:
The 'field'(s) are defined in RestaurantBean.java if they're not there 
nothing happens.  cuisine and city field's are exact matches.  The name 
field is user input and is case insensitive and will any partial part of 
a matching name.

What I want to do is to have param.field or ${restaurant[param.field]} 
evaluated only once at the beginning of the table.  param.field only 
needs to be evaluated once as it becomes the name of the table.

Thanks,
Jack
Karr, David wrote:
It's a little hard to tell exactly what you're trying to do here, but it
might be helpful to know that '${restaurant.cuisine}' is the same as
'${restaurant[param.field]}' if "param.field" is equal to "cuisine".
With this, you would need only the single case.  This strategy is only
useful if you really can guarantee that you know all the possible values
of "param.field".  If you can't be certain, then this could produce
unexpected problems down the road.

-----Original Message-----
From: Jack Lauman [mailto:[EMAIL PROTECTED] 
Sent: Sunday, April 10, 2005 1:37 PM
To: Tag Libraries Users List
Subject: JSTL Question

I have the following 'working' code to produce a table.  The value of 
${param.field} determines which field will be displayed in column 3. 
Can I move this out of the c:forEach loop and assign a temp 
variable to 
it using c:if/c:set so that I only need to evaluate the value of 
${param.field} once and not on every line?  ${param.field} 
will always 
equal city, cuisine or name.

Thanks,
Jack
<c:forEach items="${restaurantInfo.restaurants}"
  var="restaurant">
<c:set target="${restaurant}"
  property="filterField" value="${param.field}" />
<c:if
  test="${fn:containsIgnoreCase(restaurant.filterValue, 
param.value)}">

......
<c:choose>
  <c:when
    test="${param.field eq 'city'}">
    <td width="79">
    <div align="left"><font size="1"
      face="Verdana, Arial, Helvetica, sans-serif">
    <c:out value="${restaurant.cuisine}" /> </font></div>
    </td>
  </c:when>
  <c:otherwise>
    <td width="79">
    <div align="left"><font size="1"
      face="Verdana, Arial, Helvetica, sans-serif">
    <c:out value="${restaurant.city}" /> </font></div>
    </td>
  </c:otherwise>
</c:choose>

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