[This mail was original sent to the tomcat-users list, but solicited no
response, so I now put it to the tomcat-dev list to confirm there isn't
something blatantly wrong with my understanding of how *.TAG files
work. My original post:
http://marc.theaimsgroup.com/?l=tomcat-user&m=114407501224248&w=2 ]
My question is about the use of *.tag files, to have the container (TC)
automatically
build tag libraries from my test.tag file. But some aspects don't work as I
would
naturally expect and I don't know if this is my lack of understanding or a
genuine
bug.
When I use <%@ attribute name="vvAbcDefGhi" required="false" ... %> I have no
problem.
Now when I start to alter the name="" value so that it uses the values:
vvAbcDefGhi (no problem here)
vvabcdefghi (no problem here)
vAbcDefGhi (does not work for me, I would expect this to be ok, this is the
principal bug)
AbcDefGhi (does not work for me, I'm less sure if this is ok but can't see any
reason
why it isn't allowed providing the name does not clash with another defined
attribute
called abcDefGhi; as that would make substitution of ${abcDefGhi} ambiguous
because it gets
normalized to getAbcDefGhi() in the generated code; worst case scenario if this
isn't allow and
is spotted TC should emit an error and refuse to compile the *.TAG code)
When I say it does not work for me I can get an error out of TC about being
unable to find the
setter function of the generated tag library.
STACK: org.apache.jasper.JasperException: /test.jsp(*5,0*) Unable to find
setter method for attribute: vAbcDefGhi
There is a function in org/apache/jasper/compiler/Generator.java which seems to
do
the business #generateTagHandlerAttributes(TagInfo tagInfo) converts it into
code. I
have tested the methods #toGetterMethod(String) and #toSetterMethodName(String)
with
my tag attribute names above and I get expected case conversion.
Here is a cut and paste of the parts I think are relevant to allow you to see
the bug, I have tested with 5.5.17.
WEB-INF/tags/test.tag:
<%@ tag language="java" pageEncoding="UTF-8" body-content="scriptless" %>
<%@ attribute name="vvAbcDefGhi" required="false" rtexprvalue="true" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core";
<http://java.sun.com/jsp/jstl/core> %>
...SNIP...
My HTML is here ${vvAbcDefGhi}
...SNIP...
test.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd"; <http://www.w3.org/TR/html4/loose.dtd>>
<%@ taglib prefix="tags" tagdir="/WEB-INF/tags" %>
...SNIP2...
<tags:test vvAbcDefGhi="value1" />
...SNIP2...
--
Darryl L. Miles
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