On Thu, 2 May 2002, Matt Raible wrote:
> I am trying to do the following:
>
> <c:when test="${topicForm.image == ''}">
>
> but it doesn't seem to work even when getImage() returns "".
This works in the general case. Consider the following example:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%!
public static class FooBean {
public String getValue() { return ""; }
}
%>
<% pageContext.setAttribute("foo", new FooBean()); %>
<c:if test="${foo.value == ''}">
foo.value returned an empty string
</c:if>
Are you sure your topicForm.image property really equals ""?
> I tried the keyword "empty" as well with no luck:
>
> <c:when test="${topicForm.image == empty}">
The syntax is 'empty foo', not 'foo == empty'. As in:
<c:if test="${empty foo.value}">
foo.value is null, the empty string, or an empty collection
</c:if>
--
Shawn Bayern
"JSP Standard Tag Library" http://www.jstlbook.com
(coming this summer from Manning Publications)
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