> -----Original Message-----
> From: Stefan [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, October 10, 2002 10:52 PM
> To: Tag Libraries Users List
> Subject: Re: Is there a way to call
> java.lang.String.substring on a <c:
> ou t ?
>
>
> Hi,
>
> I have a weird behavior using the jakarta tag-lib with the
> JSTL forEach tag
> where when I apply the substring tag to a c:out tag the
> substring tag only
> works on the first iteration?
>
>
> <c:forEach items="${r.rows}" var="value" varStatus="status" >
>
> <tr align='center' >
> <td><c:out value="${value.sex}"/> </td>
> <td><c:out value="${value.name}"/> </td>
> <td><str:substring start="0" end="4"><c:out
> value='${value.lastName}'/></str:substring></td>
> </tr>
> </c:forEach>
> </table>
>
> Any ideas?
There's a bug in the String taglib which will cause this to happen whenever
you're running in a container which reuses tag handler instances. The
problem will show up with other tags in this taglib as well.
The bug is actually in StringTagSupport.java, where initAttributes() is
being called from within doEndTag(). Since the container is not required to
reinitialise the attributes if they have the same values - which they do in
your loop - you'll get incorrect results after the first call. (In your
case, I think what you'll see is the entire string, instead of the substring
you expected.)
The fix is simply to remove the call to initAttributes() from doEndTag().
--
Martin Cooper
>
>
> ----- Original Message -----
> From: "Martin Cooper" <[EMAIL PROTECTED]>
> To: "'Tag Libraries Users List'" <[EMAIL PROTECTED]>
> Sent: Friday, October 11, 2002 1:31 AM
> Subject: RE: Is there a way to call
> java.lang.String.substring on a <c: ou t
> ?
>
>
> > As the documentation for the String taglib states, it is
> built on the
> > Commons Lang component. The error you are seeing suggests
> that you have
> not
> > included Commons Lang in your web app.
> >
> > --
> > Martin Cooper
> >
> >
> > > -----Original Message-----
> > > From: Stefan [mailto:[EMAIL PROTECTED]]
> > > Sent: Thursday, October 10, 2002 9:46 PM
> > > To: Tag Libraries Users List
> > > Subject: Re: Is there a way to call
> > > java.lang.String.substring on a <c:
> > > out ?
> > >
> > >
> > > Hi,
> > >
> > > I just installed the string taglib and tried the simple
> > > example as found in
> > > the docs:
> > >
> > > <str:substring start="4" end="8">The tree is
> green.</str:substring>
> > >
> > > And I get this error:
> > >
> > > org/apache/commons/lang/NumberUtils
> > >
> > > I am using Resin 2.1.4 and placed the string.jar file into the web
> > > applications WEB-INF\lib folder and added the discriptor file to:
> > >
> > > WEB-INF\classes\tlds
> > >
> > > And finally I added this to the web.xml file:
> > >
> > > <taglib>
> > >
> > >
> <taglib-uri>http://jakarta.apache.org/taglibs/string-1.0</taglib-uri>
> > > <taglib-location>/WEB-INF/string.tld</taglib-location>
> > > </taglib>
> > >
> > >
> > > Any ideas what I am doing wrong?
> > >
> > > Thanks
> > >
> > > ----- Original Message -----
> > > From: "Tim Kettering" <[EMAIL PROTECTED]>
> > > To: "Tag Libraries Users List" <[EMAIL PROTECTED]>
> > > Sent: Friday, October 11, 2002 12:17 AM
> > > Subject: Re: Is there a way to call
> > > java.lang.String.substring on a <c:out ?
> > >
> > >
> > > >
> > > > http://jakarta.apache.org/taglibs/doc/string-doc/intro.html
> > > >
> > > > I'd suggest using the Strings taglib. Its really very
> > > nice, and comes
> > > with
> > > > a whole lot of other goodies you can use as well, rather
> > > than making a
> > > > one-off bean method that does the same thing.
> > > >
> > > > <str:substring start="4" end="8">
> > > > <c:out value="${param.name}"/></str:substring>
> > > >
> > > > Or something like that.
> > > >
> > > >
> > > > > So I would wrap the <c:out value="${}}"/> tag with a
> > > JSTL string taglib
> > > or
> > > > > perhaps a bean method that returns a string like so:
> > > > >
> > > > > <%= myBean.myStringMethod(<c:out
> value="${param.name}}"/>) %>
> > > > >
> > > > >
> > > > > Thanks
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Shawn Bayern" <[EMAIL PROTECTED]>
> > > > > To: "Tag Libraries Users List"
> <[EMAIL PROTECTED]>
> > > > > Sent: Thursday, October 10, 2002 11:36 PM
> > > > > Subject: Re: Is there a way to call
> > > java.lang.String.substring on a <c:
> > > out
> > > > > ?
> > > > >
> > > > >
> > > > >> On Thu, 10 Oct 2002, Stefan wrote:
> > > > >>
> > > > >>> So is there a way to extract a sub string from the
> > > result of a <c:out
> > > > >>> value="${}}"/> tag?
> > > > >>
> > > > >> No, not alone; you'd need to use the String Taglib or
> > > handle it with a
> > > > >> servlet or other custom Java logic (e.g., a bean or servlet).
> > > > >>
> > > > >> --
> > > > >> Shawn Bayern
> > > > >> "JSTL in Action" http://www.jstlbook.com
> > > > >>
> > > > >>
> > > > >> --
> > > > >> To unsubscribe, e-mail:
> > > > > <mailto:[EMAIL PROTECTED]>
> > > > >> For additional commands, e-mail:
> > > > > <mailto:[EMAIL PROTECTED]>
> > > > >>
> > > > >
> > > > >
> > > > > --
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> > > > >
> > > >
> > > > --
> > > > Tim Kettering
> > > > [EMAIL PROTECTED]
> > > >
> > > >
> > > > --
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> > > >
> > >
> > >
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> > >
> >
> >
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>
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