WALL Integration with JSTL
by Luca Passani
passani at eunet dot no

The JavaServer Pages Standard Tag Library (JSTL) encapsulates as simple tags the core functionality common to many Web applications.
JSTL has support for common, structural tasks such as iteration and conditionals, tags for manipulating XML documents, internationalization tags, and SQL tags. It also provides a framework for integrating existing custom tags with JSTL tags. For more info, check out the following documents:
http://java.sun.com/products/jsp/jstl/ and
http://jakarta.apache.org/taglibs/doc/standard-doc/intro.html .

WALL integrates with the JSTL. In particular, you can use conditional tags to query WURFL capabilities and use the Expression Language (EL) to pass values to WALL tags inside JSPs.

Example of use of the conditional tag is:

<%@ taglib uri="/WEB-INF/tld/wall.tld" prefix="wall" %>
<%@ taglib uri="/WEB-INF/tld/c.tld" prefix="c" %>
  :
<wall:load_capabilities />
  :
<c:if test="${capabilities.midp_10} && ${capabilities.j2me_colors > 8}">
  Your device supports color Java games!
</c:if>

   <c:url var="url2" value="http://someurl"> 
     <c:param name="usr" value="lp"/> 
     <c:param name="passwd" value="secret"/> 
   </c:url>
     :  
   <wall:a href="${url2}" title="Login">Auto-login</wall:a>