Re: jsp:attribute usage within c:set

[Rina Magro]

Hi
im testing usage of jsp:attribute within c:set.
Can somebody please tell me why the first code snippet works fine while the second code snipped gives me error:

%Map myMap=new HashMap();%>
<c:set var="newatt" value="<%=myMap%>"/>
<c:set target="${newatt}" property="firstkey">
<jsp:attribute name="value">firstvalue</jsp:attribute>
</c:set>
[B]<%--Above code works fine--%>[/B]

<%Map myMap=new HashMap();%>
<c:set var="newatt" value="<%=myMap%>"/>
<c:set property="firstkey" value=""firstvalue">
<jsp:attribute name="target">${newatt}</jsp:attribute>
</c:set>
[B]<%--this gives error: Encountered Illegal body of "c:set" tag, given its attributes--%>[/B]

Please help
thanks lots
Rina

[Dagbj�rn Nogva]

Hi Rina,

According to the JSTL 1.2 spec, the valid formats of <c:set> are the following when used to set bean properties/map values:

Syntax 3: Set a property of a target object using attribute value
<c:set value=�value�
target=�target� property=�propertyName�/>
 
Syntax 4: Set a property of a target object using body content
<c:set target=�target� property=�propertyName�>
body content
</c:set>

As you can see, both target and property are required tag attributes. It is only the value attribute that alternatively can be specified by the tag body. Hence, your second code snippet is a violation of the spec.

Cheers,
Dagbj�rn

[Rina Magro]

Thanks Dagbj�rn, that was what i call a spot on answer.
regards
Rina