I don't know about Custom Tag Libraries, but I do know about installing and
configuring JSTL 1.1 on Tomcat 5.5.x
Have you tried something like this with JSTL , before attempting Custom Tags ?
<c:set var="someVariable" value="some string value"/>
${someVariable}
In the above case do you see "some string value" , or do you see
${someVariable} ?
If you see ${someVariable} , then EL is not evaluating because your project's
web.xml might not be configured correctly to Servlet 2.4 spec.
Your project's web.xml for Tomcat 5.5 should be like this:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";>
</web-app>
For JSTL1.1 and Custom Tag libs I recommend these forums/ mailing lists:
http://forum.java.sun.com/forum.jspa?forumID=45&start=0
http://jakarta.apache.org/taglibs/#MailingLists
-Rashmi
----- Original Message ----
From: David Diehl <[EMAIL PROTECTED]>
To: Tomcat Users List <users@tomcat.apache.org>
Sent: Friday, March 16, 2007 2:26:32 PM
Subject: Re: Should EL (Expression Language) expressions result in the
TagData.REQUEST_TIME_VALUE object?
Sorry to be a pest, but no replies in 2 days. Any
tomcat developers willing to help me? Should I just
post this as a bug? Any advice is appreciated.
thanks.
dave
--- David Diehl <[EMAIL PROTECTED]> wrote:
> I have a custom tag with attributes defined in the
> TLD
> file as allowing run-time expression values,
> meaning:
>
> <rtexprvalue>true</rtexprvalue>
>
>
> I also have a TagExtraInfo class that I am using to
> validate the values provided.
>
> Inside my TagExtraInfo sub-class I have code such as
> this:
>
> Object attr = data.getAttribute("groupSize");
>
> if ( attr != null &&
> !attr.equals(TagData.REQUEST_TIME_VALUE)
> {
>
> and so on. When, in my JSP, I provide attribute
> values such as "<%= 10 * 14 %>" (JSP scriplet) I do
> indeed get the TagData.REQUEST_TIME_VALUE object
> back
> on this call.
>
> However, when I instead have an EL value, something
> like "${groupSizeValue}", I do not received the
> REQUEST_TIME_VALUE distinguished object back. I
> receive a String object, containing the text
> "${groupSizeValue}". Is this the correct behavior?
> Everything I have read (books, Google searches,
> etc.)
> seems to point me in the thinking that this is a
> bug.
>
>
> From looking at the tomcat 5.5.20 and 5.5.23 source
> code, I see where the JspAttribute (nested class of
> Node) is created. In the Validator class, line
> 1117,
> is the creation for this object passing the constant
> "false" for the "expr" argument (5th argument to the
> 1st ctor of this class). I believe it is line 1117
> that would be getting executed since the if
> statement
> preceding this is:
>
> if (el.containsEL() && !pageInfo.isELIgnored()) {
>
>
> So, my question is, why would an EL expression when
> EL
> is not being ignored be considered not an
> expression?
>
> Thanks in advance.
>
> dave
>
>
>
>
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