[jboss-user] [Beginner's Corner] - java.lang.ClassCastException: javax.servlet.jsp.tagext.TagSupport tag incompatible with javax.faces.component.UIComponent

[Viswanath Rajashekar]

Viswanath Rajashekar [http://community.jboss.org/people/a.r.viswanath] created the discussion

"java.lang.ClassCastException: javax.servlet.jsp.tagext.TagSupport tag incompatible with javax.faces.component.UIComponent"

To view the discussion, visit: http://community.jboss.org/message/596145#596145

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Hi All,

  I am using facelets in our application. While I'm trying to include the tag returned from class implementing javax.servlet.jsp.tagext.TagSupport, I'm getting *java.lang.ClassCastException: class name (implementing javax.servlet.jsp.tagext.TagSupport tag) incompatible with javax.faces.component.UIComponent*. The configuration being made as follows :

*xhtml file:* 
<ui:composition xmlns=" http://www.w3.org/1999/xhtml http://www.w3.org/1999/xhtml"
xmlns:ui=" http://java.sun.com/jsf/facelets http://java.sun.com/jsf/facelets"
xmlns:h=" http://java.sun.com/jsf/html http://java.sun.com/jsf/html"
xmlns:f=" http://java.sun.com/jsf/core http://java.sun.com/jsf/core"
xmlns:rich=" http://richfaces.org/rich http://richfaces.org/rich"
xmlns:a4j=" http://richfaces.org/a4j http://richfaces.org/a4j"
xmlns:sf=" http://www.springframework.org/tags/faces http://www.springframework.org/tags/faces"
xmlns:melalogin=" http://sovelluksenvaihtolistatag.tag/customTags http://sovelluksenvaihtolistatag.tag/customTags">

*tag used as :* <melalogin:sovelluksenvaihtolistatag /> 

*taglib.xml:*
<facelet-taglib> 
<namespace> http://sovelluksenvaihtolistatag.tag/customTags http://sovelluksenvaihtolistatag.tag/customTags</namespace> 
<tag> 
<tag-name>sovelluksenvaihtolistatag</tag-name> 
<component> 
<component-type>sovelluksenvaihtolistatag.component</component-type> 
</component> 
</tag> 
</facelet-taglib>

*faces-config.xml:* 
** 
<component>
   <component-type>sovelluksenvaihtolistatag.component</component-type>
   <component-class>com.tieto.tkp.login.SovelluksenVaihtoListaTag</component-class>
  </component>

*web.xml:*
** 
<context-param>
  <param-name>facelets.LIBRARIES</param-name>
  <param-value>/WEB-INF/sovelluksenvaihtolistatag.taglib.xml</param-value>
</context-param>

Does the facelet support the jsp tag? Is there any additional configurations to be made?

Regards
Viswanath
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