Hello!
I am trying to decorate one base-template mit varying
extra-functionality. For example one listing of objects, with different
additional informations, depending on the access rights granted to the user.
My idea was, to use a nested anonymous definition, which pics up a
page-context variable via an EL-expression. Here is a simplified
version, of what I have put together:
The definition:
--------------------
<definition name="list" template="/WEB-INF/templates/list.jsp">
<put-attribute name="dynamic">
<definition template="/WEB-INF/templates/dynamic.jsp">
<put-attribute name="var" expression="${i}"/>
</definition>
</put-attribute>
</definition>
---------------------
list.jsp:
---------------------
<%@page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"
session="false" %>
<%@taglib uri="http://tiles.apache.org/tags-tiles"; prefix="t" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core"; prefix="c" %>
<html>
<head><title>test</title></head>
<body>
<ul>
<c:forEach var="i" begin="1" end="10" step="1">
<li><em>Loop #${i}:</em><t:insertAttribute name="dynamic"/></li>
</c:forEach>
</ul>
</body>
</html>
---------------------
dynamic.jsp:
---------------------
<%@page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"
session="false" %>
<%@taglib uri="http://tiles.apache.org/tags-tiles"; prefix="t" %>
<t:importAttribute name="var" toName="x" ignore="true"/>
Dynamic variable in nested definition: <strong>${x}</strong>
---------------------
The problem ist:
The EL-expression ${i} does not pick up the variable from the page-scope!
If I push the variable to request-scope with an <c:set var="i"
value="${i}" scope="request"/> inside the <c:forEach>-loop, everything
works fine. But that would polute the "global namespace" and might
therefore lead to other hard to find errors later on. Besides, using the
EL-expression would be pretty pointless than, because the variable is
visible in the nested definition anyway.
Am I missing something, is this a bug, or why is it not possible to pick
up variables from page-scope via EL-expressions in definitions?
Greetings Kai
