nested datatables with s:link

[lcoetzee]

Hi,

I want to nest datatable, with the inside loop containing a s:link with an action.

Something like:

<t:dataList value="#{sections}" var="currentSection" layout="simple"
 rendered="#{not empty sections}" id="dt1">
 <li>#{currentSection.sectionLabel}
 <t:dataList value="#{currentSection.questions}"
 var="currentQuestion" layout="simple"
 rendered="#{not empty currentSection.questions}" id="dt2">
 <li><s:link action="#{questionSelectionBean.selectQuestion}" id="selectQuestion">#{currentQuestion.questionLabel}</s:link></li>
 </t:dataList>

 </ul>
 </li>
 </t:dataList>

Each section has several questions associated with it (section is annotated with a @DataModel).
It displays nicely, but as yet I have no clue how to get hold of the selected "currentQuestion" in my SFSB method (questionSelectionBean.selectQuestion).

Any ideas ?

Thanks
Louis

[lcoetzee]

I have found a way using MyFaces Tomahawk's updateActionListener. Something like:

<h:form id="section_questions">
 <ul id="linkslist">
 <t:dataList value="#{sections}" var="currentSection" layout="simple"
 rendered="#{not empty sections}" id="dt1"
 rowIndexVar="sectionRowIndex">
 <li><h:outputText value="#{currentSection.sectionLabel}" />

 <ul>
 <t:dataList value="#{currentSection.questions}"
 var="currentQuestion" layout="simple"
 rowIndexVar="questionRowIndex"
 rendered="#{not empty currentSection.questions}" id="dt2">
 <li><h:commandLink
 action="#{questionSelectionBean.selectQuestion}" id="cl1">
 <h:outputText value="#{currentQuestion.questionLabel}" />
 <t:updateActionListener id="sectionListener"
 property="#{sectionSelectionBean.sectionRowIndex}"
 value="#{sectionRowIndex}" />

 <t:updateActionListener id="questionListener"
 property="#{sectionSelectionBean.questionRowIndex}"
 value="#{questionRowIndex}" />

 </h:commandLink></li>
 </t:dataList>

 </ul>
 </li>
 </t:dataList>

 </ul>
 </h:form>

Unfortunately the solution forces me to use a form/commandLink action. I get the following exception when trying to use the s:link.

 ERROR [STDERR] 2006/07/17 03:23:34 com.sun.facelets.FaceletViewHandler handleRenderException
SEVERE: Error Rendering View[/secure/questionnaire/sections.xhtml]
java.lang.ClassCastException: org.jboss.seam.ui.HtmlLink
 at csir.utils.taghandlers.TomahawkUpdateActionListenerHandler.apply(TomahawkUpdateActionListenerHandler.java:76)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:295)
 at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:165)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:295)
 at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:165)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:295)
 at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:165)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.tag.ui.DefineHandler.apply(DefineHandler.java:58)
 at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:128)
 at com.sun.facelets.impl.DefaultFaceletContext$TemplateManager.apply(DefaultFaceletContext.java:306)
 at com.sun.facelets.impl.DefaultFaceletContext.includeDefinition(DefaultFaceletContext.java:279)
 at com.sun.facelets.tag.ui.InsertHandler.apply(InsertHandler.java:68)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
 at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
 at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
 at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
 at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
 at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
 at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:143)
 at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:113)
 at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
 at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
 at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
 at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:510)
 at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:553)
 at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
 at java.lang.Thread.run(Thread.java:595)

I am using a TomahawkUpdateActionListenerHandler as written by Andrew Robinson (http://www.mail-archive.com/[e-mail]/msg09735.html)


Any ideas ? Ideally I would like to work with s:link and not have the whole form with javascript as generated by the commandLink.

Regards

Louis

[pmuir]

What about f:param's?

<s:link action="#{questionSelectionBean.selectQuestion}" id="selectQuestion">
 <f:param name="sectionRowIndex" value="#{sectionRowIndex}" />
 <f:param name="questionRowIndex" value="#{questionRowIndex}" />
</s:link>

inject using

@RequestParam private Integer sectionRowIndex;
@RequestParam private Integer questionRowIndex;

[lcoetzee]

Jip, it will work. My one fear of using the RequestParameter stuff is that I need to add a bit more error handling to ensure that somebody isn't messing with the url (e.g sending a bogus row value).

Thanks

L

[gavin.king]

Is this yet another case of the Tomahawk stuff just not playing nicely with others?

I'm really really getting close to adding a big "don't use tomahawk components because they are too broken" warning in the Seam docs.

I'm really waiting for the Trinidad stuff to finally get released....

[lcoetzee]

Jip. I think in this case it is more a case of getting Tomahawk working with Facelets. The whole thing falls apart in a specific class that was written to allow for the usage in Facelets.

I will keep an eye on the Trinidad stuff.

With regard to the current solution:
I am still searching for good ways to handle the f:param for possible error handling.. with the @RequestParameter it gets converted to an int, but fails if somebody bookmarked and then changed the url (e.g. replacing the int with say a string... resulting in a number conversion exception). Any suggestions ?

Regards

Louis

[gavin.king]

"lcoetzee" wrote:

I am still searching for good ways to handle the f:param for possible error handling.. with the @RequestParameter it gets converted to an int, but fails if somebody bookmarked and then changed the url (e.g. replacing the int with say a string... resulting in a number conversion exception). Any suggestions ?

http://jira.jboss.com/jira/browse/JBSEAM-305

[lcoetzee]

Excellent. thanks Gavin.


Later

Louis