tomcat-taglibs-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Hans Bergsten <h...@gefionsoftware.com>
Subject Re: dynamic attributes
Date Thu, 23 Nov 2000 08:02:21 GMT
Jeff Turner wrote:
> 
> Hi,
> 
> Is there any way to dynamically create attributes for JSP taglib elements?
> 
> Eg, how would I do the following:
> 
> <util:include
> url="/servlet/MyServlet?q=<%request.getParameter("param");%>" />
> 
> ? I'd like Tomcat to first evaluate <% request.getParameter("param"); %>,
> and then feed that to <util:include url="..."/>.
> 
> Cocoon (http://xml.apache.org/cocoon) handles the above as follows:
> 
> <util:include>
>   <util:url>
>   /servlet/MyServlet?q=<xsp:expr>request.getParameter("param")</xsp:expr>
>   </util:url>
> </util:include>
> 
> So every attribute also has an equivalent "nested element" form. That's
> possible because Cocoon XSP taglibs are written in XSLT, whereas JSP has a
> more rigid API-based model.
> 
> Is any general way of doing this?

If you declare your attribute as a request-time attribute in the TLD,
you can assign it a value this way:

  <util:include
    url="<% "/servlet/MyServlet?q=" + request.getParameter("param") %>" />

See the JSP specification for details.

Hans
-- 
Hans Bergsten		hans@gefionsoftware.com
Gefion Software		http://www.gefionsoftware.com

Mime
View raw message