CODEWITHSUNDEEP
javajspel
Gandalf StormCrow
Gandalf StormCrow

Reputation: 26212

Iterating through map and checking if key is present in another map

I'm iterating through my map:

I put my map in the controller model attribute like:

model.addAttribute("myMap", realMapObject);

JSP Code:

<c:forEach items="${myMap}" var="entry">
..... works perfectly iteration itself
.....

And I need to check if myMap entry key is present in another map (anotherMap). I tried this :

model.addAttribute("anotherMap", realMapObjectAnotherMap);

JSP Code:

<c:forEach items="${myMap}" var="entry">
    .....
    .....works perfectly 
 <c:choose>
 <c:when test="${not empty ${anotherMap['${entry.key}']}}">
        <h2>${entry.key} - YES</h2>
 </c:when>

 <c:otherwise>
        <h2>${entry.key} - NOT</h2>
 </c:otherwise>
 </c:choose>

I'm getting this error:

contains invalid expression(s): javax.el.ELException: Error Parsing:

Upvotes: 0

Views: 668

Answers (1)

BalusC
BalusC

Reputation: 1108742

You can't nest EL expressions like ${ ${ } }. You need to do it in the same single EL expression.

<c:when test="${not empty anotherMap[entry.key]}">

See also:

Upvotes: 3

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