finding length of the bean value using JSTL

[Naresh Talluri]

Hi folks
Here iam facing a problem while finding the length of the particular
bean value, here is the code snippet....

 <c:set var="comment_value" value="${historyTable.comment}"></c:set>
               <c:if test="${fn:length(comment_value) > 12 }">
                Length is >12
               </c:if>  

iam not able to do this can you please let me know how can i solve it..
is there any alternative to find the length of the bean value....!
and one more thing iam getting the bean value like
<code>
<bean:write name="historyTable" property="comment"/>
</code>
how can i find the length of this bean value
Thanks in advance

[ April 04, 2008: Message edited by: Naresh Talluri ]

[Pedro Erencia]

I think using an el-function just as you are doing is a pretty reasonable way to accomplish that, since you can't directly access length of a String in el. It should work if the tld and the taglib directive are correctly defined and bound.

[Naresh Talluri]

Here iam getting error like
Validation error messages from TagLibraryValidator for c
EL functions are not supported.
and iam putting jars like jstl,standard.jar's inside lib folder......
i configured in web.xml also like .......

 <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
        <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
    </taglib>
     <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/functions</taglib-uri>
        <taglib-location>/WEB-INF/tld/fn.tld</taglib-location>
    </taglib>

-Naresh

[ April 04, 2008: Message edited by: Naresh Talluri ]
[ April 04, 2008: Message edited by: Naresh Talluri ]

[Bear Bibeault]

Why are the TLD files there? Get rid of them and the web.xml entries. They are unnecessary and could get in the way. The TLD files exist in the jar files and the container will find them there. Have you followed the instructions in the JSP FAQ for setting up the JSTL properly?

[Naresh Talluri]

I tried like that also, but i haven't get O/P
i got the exception like...
According to TLD or attribute directive in tag file, attribute test does not accept any expressions..

[Bear Bibeault]

It sounds like your configuration is not correct. I ask again: have you followed the steps in the JSP FAQ to properly set up your web app to use the JSTL and EL?

If not, you are wasting your own and everybody else's time.

[Naresh Talluri]

Hi Bear
Iam following JSP faq, as you said but iam still getting the same problem
which i had mentioned below..
here iam giving all the details...


web.xml

<web-app xmlns:xsi=   "http://www.w3.org/2001/XMLSchema-instance"
xmlns= "http://java.sun.com/xml/ns/javaee "
xmlns:web= "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation= "http://java.sun.com/xml/ns/javaee 
[URL=http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd[/URL] id=    WebApp_ID"version="2.5">
    <display-name>web app name here</display-name></web-app>

jstl jar
Iam using jstl-1.2-sources.jar

JSP

In JSP the tag declaration is

<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

Can you please let me know the solution for this...

--Naresh



[ April 05, 2008: Message edited by: Naresh Talluri ]

[Pedro Erencia]

You should use the binaries jstl-1.2.jar, not the sources jstl-1.2-sources.jar.

[Naresh Talluri]

Originally posted by Pedro Erencia:
You should use the binaries jstl-1.2.jar, not the sources Pedro Erencia.

Hi Pedro Erencia

can you please let me know what is the difference between
jstl-1.2.jar and sources jstl-1.2.jar
-Naresh

[Bear Bibeault]

Why do you not open the jars and see for yourself?

[Naresh Talluri]

Hi
this issue is resolved..
the thing is i used
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
instead of
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

Thanks for all your impeccable ideas, thoughts.

--Naresh

[Bear Bibeault]

For those wondering what the difference is, the former is a JSTL 1.1 URI, while the latter is the correct JSTL 1.2 URI.