Hi,
Answering my own question.
The code to check if an indexed property is null or not in Struts
1.0.2/JSTL seems to be so long. I am just using two date checks here. This
seems to be so even if we use JSTL. I think that this type of logic is quite
commonplace in web projects.
Should it be so complex ? Am I making it so complex? It works anyway.
<!-- Get current date and format it appropriately -->
<jsp:useBean id="now" class="java.util.Date" />
<fmt:formatDate var="currentdate" value="${now}"
pattern="dd/MM/yyyy"/>
<!-- Use the variable once. Why doesn't JSTL above do that
automatically ? -->
<jsp:useBean id="currentdate" class="java.lang.String" />
<!-- Declare two variables at the beginning. Why is type
necessary here?
These two variables are manipulated below. Why is this
declaration
necessary ? -->
<bean:define id="startdate" value="<%=currentdate%>"
type="java.lang.Object"/>
<bean:define id="enddate" value="<%=currentdate%>"
type="java.lang.Object"/>
<!-- The logic to check if the indexed property is null or not.
If it is null, use the current date. -->
<c:choose>
<c:when test="${reportForm.startDate[0] != null}">
<bean:define id="startdate" name="reportForm"
property='<%= "startDate[" + 0 + "]" %>'/>
</c:when>
<c:when test="${reportForm.startDate[0] == null}">
<bean:define id="startdate"
value="<%=currentdate.toString()%>"/>
</c:when>
<c:otherwise>
<bean:define id="startdate"
value="<%=currentdate.toString()%>"/>
</c:otherwise>
</c:choose>
<!-- The logic to check if the indexed property is null or not.
If it is null, use the current date. -->
<c:choose>
<c:when test="${reportForm.endDate[0] != null}">
<bean:define id="enddate" name="reportForm"
property='<%= "endDate[" + 0 + "]" %>'/>
</c:when>
<c:when test="${reportForm.endDate[0] == null}">
<bean:define id="enddate"
value="<%=currentdate.toString()%>"/>
</c:when>
<c:otherwise>
<bean:define id="enddate"
value="<%=currentdate.toString()%>"/>
</c:otherwise>
</c:choose>
Mohan
-----Original Message-----
From: Mohan Radhakrishnan [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 2:07 PM
To: 'Struts Users Mailing List'
Subject: bean:define and el tags
Hi
I am trying to use simple if-else logic here.
Date formatter -
<jsp:useBean id="now" class="java.util.Date" />
<fmt:formatDate var="currentdate" value="${now}"
pattern="dd/MM/yyyy"/>
If my indexed property in the form returns null, I use the current date.
<c:choose>
<c:when test="${form.startDate[0] != null}">
<bean:define id="date" name="form" property='<%= "startDate[" + 0 + "]"
%>'/>
</c:when>
<c:when test="${form.startDate[0] == null}">
<bean:define id="date" value="<%=currentdate%>"/>
</c:when>
</c:choose>
This is to populate my html:text box like this
<html:text value="<%=date.toString()%>"
Is something wrong here ? It seems that the variable "date" is not found
at runtime.
Thanks,
Mohan
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