Weird behaviour with jsp:forward and jsp:param

Question

I'm running Orion 1.5.3
Wanted to ask if anyone has insight into the following.
I'm trying to do a forward with a parameter. The parameter is something like a message string.
The following does not work.
<%
String result = "unsucessful"; // retrieved from external source... hardcoded for example's sake
%>
<jsp:forward page="<%=nextPage%>">
<jsp:param name="message" value="The result was <%=result%>"/>
</jsp:forward>
I've managed to deduce that the error is in the param value. Apparently, we cannot mix variables with static values inside the value parameter.
I've managed to get it working by doing this...
<%
String result = "unsucessful"; // retrieved from external source... hardcoded for example's sake
String message = "The result was " + result;
%>
<jsp:forward page="<%=nextPage%>">
<jsp:param name="message" value="<%=message%>"/>
</jsp:forward>
My question is, is this a bug or is it supposed to be this way ? Can we mix the value parameters ?

Answer 1

Hi Bernard,
Take a note of the following syntax -
<jsp:forward page={"relativeURL" | "<%= expression %>"} >
<jsp:param name="parameterName"
value="{parameterValue | <%= expression %>}" />+
</jsp:forward>
It is evident that either the value attribute can have an expression or simple text.
I have tried your example and I am also encountering the same kind of problem, but I have found a way out.
You can try the following in your code -
<%
String result = "unsucessful"; // retrieved from external source... hardcoded for example's sake
%>
<jsp:forward page="<%=nextPage%>">
<jsp:param name="message" value=' <%= "The result was" + result%>'/>
</jsp:forward>
Instead of using
value= "The result was <%=result%>" you can use
value= '<%= "The result was" + result%>'.
Hope this helps