RE: How to print an int with a c:out tag?
Thanks guys, I tried that and got a new error (below). I will probably just go the scriptlet route for now as maybe I have an old or incorrect JAR somewhere. Can any one tell me where the TagLib for FN is? What I did: 1. Changed web-app ... as per example. 2. Included FN taglib in my web.xml file as I do with the other ones I use: taglib taglib-uri/tags/fn/taglib-uri taglib-locationhttp://java.sun.com/jsp/jstl/functions/taglib-location /taglib taglib taglib-uri/tags/jstl-core/taglib-uri taglib-location/WEB-INF/c.tld/taglib-location /taglib Then I get File http://java.sun.com/jsp/jstl/functions; not found, OR, If I don't import the taglib in my web.xml file and just try to use it, I get: The attribute prefix fn does not correspond to any imported tag library Thanks again for you patience, you've been a great help and I've learned quite a bit. Thanks, Marius -Original Message- From: Christian Taylor [mailto:[EMAIL PROTECTED] Sent: 02 August 2005 07:59 To: Tag Libraries Users List Subject: Re: How to print an int with a c:out tag? My next guess was going to be one thing mentioned on the page Murray links to below. Regardless of whether you are using Tomcat 5, JSTL 1.1 and JSP 2.0... if your web.xml doesn't say it's a servlet 2.4 app it will revert to Servlet 2.3/JSP 1.2 (and trying to use JSTL 1.1 with JSP 1.2 probably introduces many other problems...). As the page says, make sure your webapp element starts like this: web-app 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; version=2.4 Otherwise the container will assume the servlet 2.3 spec and EL will not be allowed outside of JSTL (1.0) tags. The fn:length() function I originally mentioned is part of JSTL 1.1 anyway so it sounds like you just need to make sure everything is configured for the current specs and you should be good. Hope that will fix it up for you. -Christian Murray Steele wrote: Perhaps this page might provide the solution? http://www.oreillynet.com/cs/user/view/cs_msg/32931 Wrong taglib uri's or wrong webapp specification in your web.xml. Muz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to print an int with a c:out tag?
As far as I can tell the taglib-location for the fn taglib should probably be: /WEB-INF/fn.tld If fn.tld isn't in the WEB-INF of your webapp you should probably do a search on your filesystem for the file and copy it into your WEB-INF. It should be present *somewhere* on your system, most likely in the place you originally obtained c.tld (and the other JSTL tld files) from. The taglib-uri in your web.xml and the uri in your %@ taglib % statements have to match up and can be an ything you want (it's just a unique specifier), I think sun just recommend using their http://java.sun.com/jsp/jstl/functions urls, so that someone coming to your jsps later can look at your %@ taglib % statements and immediately realise Ah, he's using the jstl functions rather than some fn.tld that you have written yourself. (I might have this wrong tho' I'm still mainly a jsp 1.2 person) Muz On 3 Aug 2005, at 10:52, Marius Botha wrote: 2. Included FN taglib in my web.xml file as I do with the other ones I use: taglib taglib-uri/tags/fn/taglib-uri taglib-locationhttp://java.sun.com/jsp/jstl/functions/taglib- location /taglib taglib taglib-uri/tags/jstl-core/taglib-uri taglib-location/WEB-INF/c.tld/taglib-location /taglib -- Murray Steele Senior Developer Peoples Archive w: http://www.peoplesarchive.com t: 0207 323 0323 d: 0207 631 9147 This email has been scanned by Postini. For more information please visit http://www.postini.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How to print an int with a c:out tag?
I've never actually included my JSTL taglibs this way. I have just put jstl.jar and standard.jar in WEB-INF/lib. The TLD files are contained in standard.jar and should be automatically recognized by the container (Tomcat or otherwise). All I have to do then is include this line in any JSP: [EMAIL PROTECTED] uri=http://java.sun.com/jsp/jstl/core; prefix=c% (modify for the sql, fmt, xml and function taglibs of course) I wonder if trying to put your own entry in web.xml and use separate TLD files is causing problems? -Christian -Original Message- From: Marius Botha [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 03, 2005 6:52 AM To: 'Tag Libraries Users List' Subject: RE: How to print an int with a c:out tag? Thanks guys, I tried that and got a new error (below). I will probably just go the scriptlet route for now as maybe I have an old or incorrect JAR somewhere. Can any one tell me where the TagLib for FN is? What I did: 1. Changed web-app ... as per example. 2. Included FN taglib in my web.xml file as I do with the other ones I use: taglib taglib-uri/tags/fn/taglib-uri taglib-locationhttp://java.sun.com/jsp/jstl/functions/taglib-location /taglib taglib taglib-uri/tags/jstl-core/taglib-uri taglib-location/WEB-INF/c.tld/taglib-location /taglib Then I get File http://java.sun.com/jsp/jstl/functions; not found, OR, If I don't import the taglib in my web.xml file and just try to use it, I get: The attribute prefix fn does not correspond to any imported tag library Thanks again for you patience, you've been a great help and I've learned quite a bit. Thanks, Marius -Original Message- From: Christian Taylor [mailto:[EMAIL PROTECTED] Sent: 02 August 2005 07:59 To: Tag Libraries Users List Subject: Re: How to print an int with a c:out tag? My next guess was going to be one thing mentioned on the page Murray links to below. Regardless of whether you are using Tomcat 5, JSTL 1.1 and JSP 2.0... if your web.xml doesn't say it's a servlet 2.4 app it will revert to Servlet 2.3/JSP 1.2 (and trying to use JSTL 1.1 with JSP 1.2 probably introduces many other problems...). As the page says, make sure your webapp element starts like this: web-app 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; version=2.4 Otherwise the container will assume the servlet 2.3 spec and EL will not be allowed outside of JSTL (1.0) tags. The fn:length() function I originally mentioned is part of JSTL 1.1 anyway so it sounds like you just need to make sure everything is configured for the current specs and you should be good. Hope that will fix it up for you. -Christian Murray Steele wrote: Perhaps this page might provide the solution? http://www.oreillynet.com/cs/user/view/cs_msg/32931 Wrong taglib uri's or wrong webapp specification in your web.xml. Muz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to print an int with a c:out tag?
Hi Marius,
Check out the fn:length() function, this is what you are looking for.
size() is a method and you cannot call methods directly from JSTL (only
getters and setters), but the fn taglib provides a function for length
of Collections and strings. See the JSTL 1.1 documentation for more
information, but basically fn:length() is what you are looking for:
c:out value=${fn:length(myList)}/
Hope this helps.
-Christian
Marius Botha wrote:
Hi there,
Just a basic question. I am trying to print out the size() of a List, like
the tag below.
c:out value=${myList.size}/
But I am getting the following error: An error occurred while evaluating
custom action attribute value with value ${myList.size}: The .
operator was supplied with an index value of type java.lang.String to be
applied to a List or array, but that value cannot be converted to an
integer. (null)
Can the c:out tag not print int's or is it that I am calling size() which
does not have a getter/setter method? Please help.
Thanks,
Marius
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RE: How to print an int with a c:out tag?
Thanks, I'll try that.
Cheers,
Marius
-Original Message-
From: Christian Taylor [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 01:08
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
Hi Marius,
Check out the fn:length() function, this is what you are looking for.
size() is a method and you cannot call methods directly from JSTL (only
getters and setters), but the fn taglib provides a function for length
of Collections and strings. See the JSTL 1.1 documentation for more
information, but basically fn:length() is what you are looking for:
c:out value=${fn:length(myList)}/
Hope this helps.
-Christian
Marius Botha wrote:
Hi there,
Just a basic question. I am trying to print out the size() of a List, like
the tag below.
c:out value=${myList.size}/
But I am getting the following error: An error occurred while evaluating
custom action attribute value with value ${myList.size}: The .
operator was supplied with an index value of type java.lang.String to be
applied to a List or array, but that value cannot be converted to an
integer. (null)
Can the c:out tag not print int's or is it that I am calling size() which
does not have a getter/setter method? Please help.
Thanks,
Marius
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RE: How to print an int with a c:out tag?
My requirement is really a bit different. I have an expression, which
returns a List, the size of which I would like to display. I.e. I have
${myController.activitiesForResource}, which returns a list.
If I try c:out
value=${fn:length(${myController.activitiesForResource})}/ I get an error
saying EL expressions are not supported. Any ideas?
Thanks,
Marius
-Original Message-
From: Christian Taylor [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 01:08
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
Hi Marius,
Check out the fn:length() function, this is what you are looking for.
size() is a method and you cannot call methods directly from JSTL (only
getters and setters), but the fn taglib provides a function for length
of Collections and strings. See the JSTL 1.1 documentation for more
information, but basically fn:length() is what you are looking for:
c:out value=${fn:length(myList)}/
Hope this helps.
-Christian
Marius Botha wrote:
Hi there,
Just a basic question. I am trying to print out the size() of a List, like
the tag below.
c:out value=${myList.size}/
But I am getting the following error: An error occurred while evaluating
custom action attribute value with value ${myList.size}: The .
operator was supplied with an index value of type java.lang.String to be
applied to a List or array, but that value cannot be converted to an
integer. (null)
Can the c:out tag not print int's or is it that I am calling size() which
does not have a getter/setter method? Please help.
Thanks,
Marius
-
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Re: How to print an int with a c:out tag?
I suspect that you are using either Tomcat 4.1.x and / or Standard 1.0x
for your JSTL. EL functions are part of the JSTL 1.1 spec (JSP 2.0)
and aren't supported on Tomcat 4.1.x or Standard 1.0x (JSP 1.2 and JSTL
1.0 respectively). If you want to use the fn:length you need to use
JSTL 1.1 and hence Standard 1.1 and / or Tomcat 5.x. (I think those
versions are correct, someone correct me if I'm wrong).
If you cant change the version of Tomcat / JSTL you use:
1. You could alter your myController.getOpenActivitiesForResource
method to return a class that extends list to provide a getSize() (and
hence your original c:out value=${myList.size}/ would work.
2. Find some other Tag lib that lets you output list sizes.
(unstandard from the sandbox does this)
3. Just use a scriptlet %= ((MyControllerClass)
pageContext.findAttribute(myController)).getOpenActivitiesForResource(
).size() %.
Muz
On 2 Aug 2005, at 13:06, Marius Botha wrote:
Ok, I feel like an idiot... I tried it with and without the nested ${}
as
you guys suggested and am still getting the same EL expressions not
supported error. I am including the c.tld tag library. Should I
maybe be
using c-rt.tld instead, or what can it be?
Thanks for your effort. Error below.
Marius
org.apache.jasper.JasperException: Validation error messages from
TagLibraryValidator for c38: tag = 'out' / attribute = 'value': An
error
occurred while parsing custom action attribute value with value
${fn:length(activityCtrl.openActivitiesForResource)}:
org.apache.taglibs.standard.lang.jstl.parser.ParseException: EL
functions
are not supported.
-Original Message-
From: Christian Taylor [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 01:38
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
You're using too many ${} combinations :) You only need them once to
signal an expression. Try this:
c:out value=${fn:length(myController.activitiesForResource)}/
You only need to use ${ ... } for the entire expression; it is not
necessary to use this syntax again inside the expression.
-Christian
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t: 0207 323 0323
d: 0207 631 9147
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RE: How to print an int with a c:out tag?
You know your stuff hey :)
I believe I do use Tomcat 5 (running inside JBoss 3.2) and as a result have
their JSTL (looks like 1.1) and JSP-2.0.jar. Where do I find or can I check
if I have the TLD for the functions library (so I can include it if
missing)? At the moment I am including the TLD's in my WAR project and
specify them in the web.xml file.
Thanks again.
Marius
-Original Message-
From: Murray Steele [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 02:31
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
I suspect that you are using either Tomcat 4.1.x and / or Standard 1.0x
for your JSTL. EL functions are part of the JSTL 1.1 spec (JSP 2.0)
and aren't supported on Tomcat 4.1.x or Standard 1.0x (JSP 1.2 and JSTL
1.0 respectively). If you want to use the fn:length you need to use
JSTL 1.1 and hence Standard 1.1 and / or Tomcat 5.x. (I think those
versions are correct, someone correct me if I'm wrong).
If you cant change the version of Tomcat / JSTL you use:
1. You could alter your myController.getOpenActivitiesForResource
method to return a class that extends list to provide a getSize() (and
hence your original c:out value=${myList.size}/ would work.
2. Find some other Tag lib that lets you output list sizes.
(unstandard from the sandbox does this)
3. Just use a scriptlet %= ((MyControllerClass)
pageContext.findAttribute(myController)).getOpenActivitiesForResource(
).size() %.
Muz
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Re: How to print an int with a c:out tag?
Perhaps this page might provide the solution?
http://www.oreillynet.com/cs/user/view/cs_msg/32931
Wrong taglib uri's or wrong webapp specification in your web.xml.
Muz
On 2 Aug 2005, at 14:32, Marius Botha wrote:
You know your stuff hey :)
I believe I do use Tomcat 5 (running inside JBoss 3.2) and as a result
have
their JSTL (looks like 1.1) and JSP-2.0.jar. Where do I find or can I
check
if I have the TLD for the functions library (so I can include it if
missing)? At the moment I am including the TLD's in my WAR project and
specify them in the web.xml file.
Thanks again.
Marius
-Original Message-
From: Murray Steele [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 02:31
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
I suspect that you are using either Tomcat 4.1.x and / or Standard 1.0x
for your JSTL. EL functions are part of the JSTL 1.1 spec (JSP 2.0)
and aren't supported on Tomcat 4.1.x or Standard 1.0x (JSP 1.2 and JSTL
1.0 respectively). If you want to use the fn:length you need to use
JSTL 1.1 and hence Standard 1.1 and / or Tomcat 5.x. (I think those
versions are correct, someone correct me if I'm wrong).
If you cant change the version of Tomcat / JSTL you use:
1. You could alter your myController.getOpenActivitiesForResource
method to return a class that extends list to provide a getSize() (and
hence your original c:out value=${myList.size}/ would work.
2. Find some other Tag lib that lets you output list sizes.
(unstandard from the sandbox does this)
3. Just use a scriptlet %= ((MyControllerClass)
pageContext.findAttribute(myController)).getOpenActivitiesForResource
(
).size() %.
Muz
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--
Murray Steele
Senior Developer
Peoples Archive
w: http://www.peoplesarchive.com
t: 0207 323 0323
d: 0207 631 9147
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Re: How to print an int with a c:out tag?
My next guess was going to be one thing mentioned on the page Murray
links to below. Regardless of whether you are using Tomcat 5, JSTL 1.1
and JSP 2.0... if your web.xml doesn't say it's a servlet 2.4 app it
will revert to Servlet 2.3/JSP 1.2 (and trying to use JSTL 1.1 with JSP
1.2 probably introduces many other problems...). As the page says, make
sure your webapp element starts like this:
web-app 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; version=2.4
Otherwise the container will assume the servlet 2.3 spec and EL will not
be allowed outside of JSTL (1.0) tags. The fn:length() function I
originally mentioned is part of JSTL 1.1 anyway so it sounds like you
just need to make sure everything is configured for the current specs
and you should be good. Hope that will fix it up for you.
-Christian
Murray Steele wrote:
Perhaps this page might provide the solution?
http://www.oreillynet.com/cs/user/view/cs_msg/32931
Wrong taglib uri's or wrong webapp specification in your web.xml.
Muz
On 2 Aug 2005, at 14:32, Marius Botha wrote:
You know your stuff hey :)
I believe I do use Tomcat 5 (running inside JBoss 3.2) and as a result
have
their JSTL (looks like 1.1) and JSP-2.0.jar. Where do I find or can I
check
if I have the TLD for the functions library (so I can include it if
missing)? At the moment I am including the TLD's in my WAR project and
specify them in the web.xml file.
Thanks again.
Marius
-Original Message-
From: Murray Steele [mailto:[EMAIL PROTECTED]
Sent: 02 August 2005 02:31
To: Tag Libraries Users List
Subject: Re: How to print an int with a c:out tag?
I suspect that you are using either Tomcat 4.1.x and / or Standard 1.0x
for your JSTL. EL functions are part of the JSTL 1.1 spec (JSP 2.0)
and aren't supported on Tomcat 4.1.x or Standard 1.0x (JSP 1.2 and JSTL
1.0 respectively). If you want to use the fn:length you need to use
JSTL 1.1 and hence Standard 1.1 and / or Tomcat 5.x. (I think those
versions are correct, someone correct me if I'm wrong).
If you cant change the version of Tomcat / JSTL you use:
1. You could alter your myController.getOpenActivitiesForResource
method to return a class that extends list to provide a getSize() (and
hence your original c:out value=${myList.size}/ would work.
2. Find some other Tag lib that lets you output list sizes.
(unstandard from the sandbox does this)
3. Just use a scriptlet %= ((MyControllerClass)
pageContext.findAttribute(myController)).getOpenActivitiesForResource
(
).size() %.
Muz
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--
Murray Steele
Senior Developer
Peoples Archive
w: http://www.peoplesarchive.com
t: 0207 323 0323
d: 0207 631 9147
This email has been scanned by Postini.
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